1→# Anchor Implementation Plan
     2→
     3→C engine with YueScript scripting, OpenGL rendering, targeting Windows and Web.
     4→
     5→---
     6→
     7→## Summary of Key Decisions
     8→
     9→| Area | Decision | Rationale |
    10→|------|----------|-----------|
    11→| Renderer | OpenGL | Smooth rotation, additive blending, performance headroom, console-portable |
    12→| Audio | miniaudio + stb_vorbis | Single-header, pitch shifting, OGG support |
    13→| Physics | Box2D 3.1 | Already used, true ball-to-ball collisions needed |
    14→| Scripting | Lua 5.4 + YueScript | Build-time compilation with `-r` flag for line numbers |
    15→| Timestep | Fixed 120Hz physics, 60Hz render | Decoupled for pixel-perfect visuals with responsive input |
    16→| Resolution | Per-game configurable | 480×270, 640×360, or custom; aspect-ratio scaling with letterboxing |
    17→| C Structure | Single anchor.c | Monolithic file, easier navigation |
    18→| Resources | Live forever | Games are small enough; no unloading needed |
    19→| Linking | Static | No DLLs; SDL2, Lua, audio all compiled in |
    20→| Distribution | Single executable | Zip-append for game content, extractable by modders |
    21→
    22→---
    23→
    24→## Build Strategy
    25→
    26→### YueScript Compilation
    27→
    28→**Build-time compilation** — compile `.yue` → `.lua` during build, not at runtime.
    29→
    30→```
... [1295 more lines]

No files found

Web search results for query: "Box2D 3.1 documentation API reference"

Links: [{"title":"Box2D: Overview","url":"https://box2d.org/documentation/"},{"title":"Box2D: Box2D API Documentation","url":"http://louis-langholtz.github.io/Box2D/API/index.html"},{"title":"Box2D - Box2D Documentation","url":"https://documentation.help/Box2D/"},{"title":"Box2D: Box2D API Documentation","url":"https://jesse.tg/Box2D-Docs/"},{"title":"Box2D - Gymnasium Documentation","url":"https://gymnasium.farama.org/environments/box2d/"},{"title":"Box2D for Processing API Reference? Manual? - Processing 2.x and 3.x Forum","url":"https://forum.processing.org/two/discussion/26182/box2d-for-processing-api-reference-manual.html"},{"title":"gdx-box2d 3.1.1-0 API","url":"https://javadoc.io/doc/com.badlogicgames.gdx/gdx-box2d/latest/index.html"},{"title":"API Reference — box2d-python 2025 documentation","url":"https://box2d-py.readthedocs.io/en/latest/api/api.html"},{"title":"Box2D: v3.1 Release Notes","url":"https://box2d.org/documentation/md_release__notes__v310.html"},{"title":"Box2D: E:/github/box2d/include/box2d/box2d.h Source File","url":"https://box2d.org/documentation/box2d_8h_source.html"}]

Based on the search results, here's what I found about Box2D 3.1 documentation and API reference:

## Official Box2D Documentation

Box2D works with floating point numbers and tolerances have to be used to make Box2D perform well. These tolerances have been tuned to work well with meters-kilogram-second (MKS) units. In particular, Box2D has been tuned to work well with moving shapes between 0.1 and 10 meters, so objects between soup cans and buses in size should work well.

The main official documentation is available at:

- **https://box2d.org/documentation/** - The official Box2D overview and documentation

## Box2D v3.1 Release Notes

The v3.1 Release Notes include API Changes such as 64-bit filter categories and masks, 64-bit dynamic tree user data, renamed b2SmoothSegment to b2ChainSegment, and cast and overlap functions modified for argument consistency.

The release notes are available at: https://box2d.org/documentation/md_release__notes__v310.html

## API Reference Details

The Box2D API includes functions like:

- b2CreateCircleShape - Create a circle shape and attach it to a body
- b2CreatePolygonShape - Create a polygon shape and attach it to a body
- b2World_SetCustomFilterCallback - Register the custom filter callback (optional)

The full source header file can be viewed at: https://box2d.org/documentation/box2d_8h_source.html

## Other Resources

... [5 more lines]

# Box2D 3.1.0 API Overview

## Core Architecture

Box2D 3.x uses an **ID-based handle system** rather than direct pointers. When creating worlds, bodies, shapes, or joints, you receive opaque IDs that provide safety checks and 64k generation support.

## World & Body Creation

Bodies are created via definition structures:

- Initialize with `b2DefaultBodyDef()` (C doesn't support zero initialization)
- Set properties like position: `bodyDef.position = (b2Vec2){10.0f, 5.0f}`
- Create via `b2CreateBody(worldId, &bodyDef)`, receiving a `b2BodyId`
- Destroy with `b2DestroyBody(bodyId)`

## Shape System

Shapes bind collision geometry to bodies with material properties:

- Initialize `b2ShapeDef` via `b2DefaultShapeDef()`
- Configure friction, density, and restitution
- Create polygons (e.g., `b2MakeBox()`) and attach via `b2CreatePolygonShape()`
- Shapes auto-destroy when their body is destroyed

## Fundamental Concepts

The documentation defines several core types:

| Concept | Purpose |
|---------|---------|
| **Rigid Body** | "A chunk of matter...the distance between any two bits is constant" |
| **Constraint** | Removes degrees of freedom via joints or contacts |
... [19 more lines]

# Box2D Core Function Declarations

## World Management

- `b2WorldId b2CreateWorld(const b2WorldDef *def)` - Create simulation world
- `void b2DestroyWorld(b2WorldId worldId)` - Destroy world
- `bool b2World_IsValid(b2WorldId id)` - Validate world identifier
- `void b2World_Step(b2WorldId worldId, float timeStep, int subStepCount)` - Advance simulation

## Body Operations

- `b2BodyId b2CreateBody(b2WorldId worldId, const b2BodyDef *def)` - Create rigid body
- `void b2DestroyBody(b2BodyId bodyId)` - Destroy body
- `bool b2Body_IsValid(b2BodyId id)` - Validate body identifier
- `b2BodyType b2Body_GetType(b2BodyId bodyId)` - Retrieve body type
- `void b2Body_SetType(b2BodyId bodyId, b2BodyType type)` - Modify body type

## Shape Creation

- `b2ShapeId b2CreateCircleShape(b2BodyId bodyId, const b2ShapeDef *def, const b2Circle *circle)`
- `b2ShapeId b2CreateSegmentShape(b2BodyId bodyId, const b2ShapeDef *def, const b2Segment *segment)`
- `b2ShapeId b2CreateCapsuleShape(b2BodyId bodyId, const b2ShapeDef *def, const b2Capsule *capsule)`
- `b2ShapeId b2CreatePolygonShape(b2BodyId bodyId, const b2ShapeDef *def, const b2Polygon *polygon)`
- `void b2DestroyShape(b2ShapeId shapeId, bool updateBodyMass)` - Remove shape

## Event Retrieval

- `b2BodyEvents b2World_GetBodyEvents(b2WorldId worldId)` - Body lifecycle events
- `b2SensorEvents b2World_GetSensorEvents(b2WorldId worldId)` - Sensor overlap events
- `b2ContactEvents b2World_GetContactEvents(b2WorldId worldId)` - Contact events

## Spatial Queries

- `b2TreeStats b2World_OverlapAABB(b2WorldId worldId, b2AABB aabb, b2QueryFilter filter, b2OverlapResultFcn *fcn, void *context)`
- `b2TreeStats b2World_OverlapShape(b2WorldId worldId, const b2ShapeProxy *proxy, b2QueryFilter filter, b2OverlapResultFcn *fcn, void *context)`
... [7 more lines]

Web search results for query: "Box2D 3.0 events system sensor contact begin end tutorial"

Links: [{"title":"Box2D: Events","url":"https://box2d.org/documentation/group__events.html"},{"title":"Sensors - Box2D tutorials - iforce2d","url":"https://www.iforce2d.net/b2dtut/sensors"},{"title":"Phaser - Box2D Tutorials","url":"https://phaser.io/tutorials/box2d-tutorials/sensors"},{"title":"Box2D: Simulation","url":"https://box2d.org/documentation/md_simulation.html"},{"title":"Box2D 3.1 :: Box2D","url":"https://box2d.org/posts/2025/04/box2d-3.1/"},{"title":"Sensor end event sometimes missing · Issue #867 · erincatto/box2d","url":"https://github.com/erincatto/box2d/issues/867"},{"title":"Box2D BeginContact & Sensor Fixtures","url":"http://wizardfu.com/book/cocos2d-x/box2d-begincontact-sensor-fixtures/"},{"title":"box2d_sys - Rust","url":"https://docs.rs/box2d_sys#:~:text=A begin touch event is generated when a,to overlap a sensor shape.&text=b2SensorEndTouchEvent-,An end touch event is generated when,stops overlapping a sensor shape."},{"title":"Full LibGDX Game Tutorial - Box2D Contact Listener - Game Development","url":"https://www.gamedevelopment.blog/full-libgdx-game-tutorial-box2d-contact-listener/"},{"title":"Sensors · GuidebeeGameEngine/Box2D Wiki · GitHub","url":"https://github.com/GuidebeeGameEngine/Box2D/wiki/Sensors"}]

Here are the search results for Box2D 3.0 events system and sensor contact begin/end tutorials:

## Official Box2D Documentation

A begin touch event is generated when a shape starts to overlap a sensor shape.(no content)An end touch event is generated when a shape stops overlapping a sensor shape.(no content)Sensor events are buffered in the Box2D world and are available as begin/end overlap event arrays after the time step is complete.(no content)You will also get an end event if the sensor or visitor are destroyed. Therefore you should always confirm the shape id is valid using `b2Shape_IsValid`.

## Key Information from Box2D Simulation Docs

Sensors are processed at the end of the world step and generate begin and end events without delay. User operations may cause overlaps to begin or end. These are processed the next time step.(no content)Sensors do not detect objects that pass through the sensor shape within one time step. So sensors do not have continuous collision detection. If you have fast moving object and/or small sensors then you should use a ray or shape cast to detect these events.(no content)Note: A shape cannot start or stop being a sensor. Such a feature would break sensor events, potentially causing bugs in game logic.

## Creating Sensors (Phaser Tutorial)

A shape can be made into a 'sensor' by setting the `isSensor` property of the shape definition to true when you create it, or by calling `b2Shape_SetSensor()` on the shape after it has been created. Sensors behave as if their maskBits is set to zero - they never collide with anything. But they do generate sensor events to let us know when they start or stop overlapping another shape.

## Handling Sensor Events (Code Example)

Set up a collision callback to tell the friendly entities when their radar sensor begins or ends contact with an enemy aircraft: `function handleSensorEvents(world) { const sensorEvents = b2World_GetSensorEvents(world); for (const event ...`

## Box2D 3.1 Improvements

The new sensor system now runs at the end of the update, so the overlap events are not delayed. Sensors produce reliable begin and end touch events and you can also access the current overlaps on a sensor shape. This system is multithreaded and deterministic.

## Important Validation Note

You can access the current sensor overlaps. Be careful because some shape ids may be invalid due to a shape being destroyed. Use `b2Shape_IsValid` to ensure an overlapping shape is still valid.

... [2 more lines]

# Box2D 3.x Simulation System

## World Stepping

Box2D uses a fixed timestep model with sub-stepping for accuracy:

```c
b2World_Step(worldId, timeStep, subStepCount);
```

The engine divides each frame into smaller increments. "A time step of 1/60 seconds (60Hz) will usually deliver a high quality simulation," with sub-step counts of 4 recommended, though complex structures benefit from higher values (e.g., 8 sub-steps for scissor lifts).

## Body Types

Box2D implements three distinct body classifications:

- **Static**: Zero mass, infinite inertia, doesn't move under simulation
- **Kinematic**: User-controlled velocity, zero mass, infinite inertia, responds to velocity only
- **Dynamic**: Finite mass, fully simulated, responds to forces and collisions

> "A dynamic body is fully simulated and moves according to forces and torques. A dynamic body can collide with all body types."

## Collision Filtering

The filtering system uses three mechanisms:

### Categories and Masks
Each shape belongs to one category (64 available). Collision occurs when:
```c
if ((catA & maskB) != 0 && (catB & maskA) != 0)
... [94 more lines]

Web search results for query: "Box2D 3 raycast shape cast overlap query AABB tutorial"

Links: [{"title":"Phaser - Box2D Tutorials","url":"https://phaser.io/tutorials/box2d-tutorials/world-querying"},{"title":"Box2D: Collision","url":"https://box2d.org/documentation/md_collision.html"},{"title":"World querying - Box2D tutorials - iforce2d","url":"https://www.iforce2d.net/b2dtut/world-querying"},{"title":"Ray casting - Box2D tutorials - iforce2d","url":"https://www.iforce2d.net/b2dtut/raycasting"},{"title":"Box2D: Collision Module","url":"https://box2d.org/doc_version_2_4/md__e_1_2github_2box2d__24_2docs_2collision.html"},{"title":"Box2D: Dynamic Tree","url":"https://box2d.org/documentation/group__tree.html"},{"title":"cython-box2d/docs/source/getting_started.md at master · pybox2d/cython-box2d","url":"https://github.com/pybox2d/cython-box2d/blob/master/docs/source/getting_started.md"},{"title":"pybox2d/Box2D/Collision/b2BroadPhase.h at master · pybox2d/pybox2d","url":"https://github.com/pybox2d/pybox2d/blob/master/Box2D/Collision/b2BroadPhase.h"},{"title":"Box2D: box2d::World Class Reference","url":"http://louis-langholtz.github.io/Box2D/API/classbox2d_1_1_world.html"},{"title":"Box2D.Dynamics.b2World","url":"https://www.boristhebrave.com/permanent/09/Box2DFlashAS3Docs/Box2D/Dynamics/b2World.html"}]

Here are the search results for Box2D 3 raycast, shape cast, overlap query, and AABB tutorials:

## Key Tutorials and Documentation Found

### Phaser Box2D Tutorial (World Querying)
Box2D provides two tools for world querying - ray casting and AABB testing.(no content)Manually looping through every shape can be very inefficient when you have a large number of shapes in the scene. A better way is to use the CastRay function of the world itself, which allows the engine to focus on shapes which it knows are near the ray's path.

**Ray Cast Function:**
The function looks like: `b2World_CastRay(worldId, origin, translation, filter, resultCallback, context);`(no content)If your ray is long enough there could be many shapes that it intersects with, and your callback could be called many times during one CastRay. Very importantly, this raycast does not detect shapes in order of nearest to furthest, it just gives them to you in any old order - this helps it to be efficient for very large scenes.

**AABB Query:**
The Box2D world has another function for finding shapes overlapping a given area, the AABB query. The tutorial shows using `b2World_OverlapAABB(worldId, aabb, filter, queryCallback, null)` to find all shapes overlapping a rectangular region.

### Official Box2D Collision Documentation

You can perform geometric queries on a single shape. You can test a point for overlap with a shape by providing a transform for the shape and a world point.

**Ray Casting:**
You can cast a ray at a shape to get the point of first intersection and normal vector. Caution: No hit will register if the ray starts inside a convex shape like a circle or polygon. This is consistent with Box2D treating convex shapes as solid.

**Shape Casting:**
You can also cast a shape at another shape. You can use fixed rotations to perform a shape cast. In this case, the time of impact function will not miss any collisions.(no content)Even more generic, you can use `b2ShapeCast()` to linearly cast one point cloud at another point cloud. All shape cast functions use this internally.

### Dynamic Tree (AABB Organization)

The dynamic tree is a binary AABB tree to organize and query large numbers of geometric objects. Box2D uses the dynamic tree internally to sort collision shapes into a binary bounding volume hierarchy. This data structure may have uses in games for organizing other geometry data and may be used independently of Box2D rigid body simulation.(no content)A dynamic tree arranges data in a binary tree to accelerate queries such as AABB queries and ray casts. Leaf nodes are proxies with an AABB.
... [12 more lines]

# Box2D 3.x Collision Queries Overview

Based on the provided documentation, Box2D 3.x offers several geometric query types for collision detection:

## Ray Casting

Ray casting determines where a ray intersects a shape. The process uses `b2RayCastInput` to define the ray parameters:

- **Origin**: Starting point of the ray
- **Translation**: Direction and distance vector
- **maxFraction**: Typically 1.0 to consider the full translation

The function returns `b2CastOutput` with a `hit` boolean and intersection data. **Important limitation**: "No hit will register if the ray starts inside a convex shape like a circle or polygon."

Specific ray cast functions include `b2RayCastPolygon()` for polygon shapes, with comparable functions for circles and capsules.

## Shape Casting

Shape casting extends ray casting by casting a moving convex shape against static geometry. The `b2ShapeCastInput` structure includes:

- **points[]**: Point cloud defining the shape
- **radius**: Convex radius around the point cloud
- **translation**: Movement vector
- **maxFraction**: Maximum travel distance

The generic `b2ShapeCast()` function handles point cloud-to-point cloud casting with linear motion.

## Distance Queries

`b2ShapeDistance()` computes "the closest points between two shapes represented as point clouds." This function supports caching for warm-starting repeated queries on slowly-moving shapes.
... [12 more lines]

Web search results for query: "Box2D 3 b2QueryFilter b2World_OverlapAABB b2World_CastRay functions"

Web search error: unavailable

I apologize, but the web search tool is currently unavailable. However, I can share what I know from my training data about Box2D 3 (also known as Box2D v3.0):

## Box2D 3 Query Functions

**b2QueryFilter** is a struct used to filter which shapes are included in queries. It typically contains:
- `categoryBits` - The collision category bits
- `maskBits` - The collision mask bits (what categories to collide with)

**b2World_OverlapAABB** is used to query all shapes that overlap with a given axis-aligned bounding box (AABB). The typical signature is:
```c
void b2World_OverlapAABB(b2WorldId worldId, b2AABB aabb, b2QueryFilter filter, b2OverlapResultFcn* fcn, void* context);
```

**b2World_CastRay** performs a ray cast against shapes in the world. It's commonly used for:
- Line-of-sight checks
- Shooting mechanics
- Ground detection

The typical signature is:
```c
b2RayResult b2World_CastRay(b2WorldId worldId, b2Vec2 origin, b2Vec2 translation, b2QueryFilter filter);
```

For the most accurate and up-to-date API documentation, I'd recommend checking:
1. The official Box2D GitHub repository: https://github.com/erincatto/box2d
2. The Box2D header files (especially `box2d.h`)
... [5 more lines]

# Box2D World Query Functions and Types

Based on the header file content, here are the world query-related declarations:

## World Query Functions

```c
B2_API b2TreeStats b2World_OverlapAABB(b2WorldId worldId, b2AABB aabb, 
    b2QueryFilter filter, b2OverlapResultFcn* fcn, void* context);

B2_API b2TreeStats b2World_OverlapShape(b2WorldId worldId, 
    const b2ShapeProxy* proxy, b2QueryFilter filter, 
    b2OverlapResultFcn* fcn, void* context);

B2_API b2TreeStats b2World_CastRay(b2WorldId worldId, b2Vec2 origin, 
    b2Vec2 translation, b2QueryFilter filter, 
    b2CastResultFcn* fcn, void* context);

B2_API b2RayResult b2World_CastRayClosest(b2WorldId worldId, 
    b2Vec2 origin, b2Vec2 translation, b2QueryFilter filter);

B2_API b2TreeStats b2World_CastShape(b2WorldId worldId, 
    const b2ShapeProxy* proxy, b2Vec2 translation, 
    b2QueryFilter filter, b2CastResultFcn* fcn, void* context);
```

## Specialized Query Functions

```c
B2_API float b2World_CastMover(b2WorldId worldId, 
... [8 more lines]

# Box2D Type Definitions Extract

## Query and Ray Cast Structures

**b2QueryFilter** - Filters collisions during queries:
```c
typedef struct b2QueryFilter {
    uint64_t categoryBits;  // Query's collision category bits
    uint64_t maskBits;      // Shape categories this query accepts
} b2QueryFilter;
```

**b2RayResult** - Results from ray casting operations:
```c
typedef struct b2RayResult {
    b2ShapeId shapeId;
    b2Vec2 point;
    b2Vec2 normal;
    float fraction;
    int nodeVisits;
    int leafVisits;
    bool hit;
} b2RayResult;
```

## Callback Function Prototypes

**b2OverlapResultFcn** - "Called for each shape found in the query":
```c
typedef bool b2OverlapResultFcn(b2ShapeId shapeId, void* context);
... [127 more lines]

Web search results for query: "Box2D 3 b2Shape_GetSensorOverlaps current overlaps API"

Links: [{"title":"Box2D: Shape","url":"https://box2d.org/documentation/group__shape.html"},{"title":"box2d/include/box2d/box2d.h at main · erincatto/box2d","url":"https://github.com/erincatto/box2d/blob/main/include/box2d/box2d.h"},{"title":"Box2D: E:/github/box2d/include/box2d/box2d.h Source File","url":"https://box2d.org/documentation/box2d_8h_source.html"},{"title":"Box2D 3.1 :: Box2D","url":"https://box2d.org/posts/2025/04/box2d-3.1/"},{"title":"Box2D: Simulation","url":"https://box2d.org/documentation/md_simulation.html"},{"title":"Overlapping sensors - Box2D order / behavior - LÖVE","url":"https://love2d.org/forums/viewtopic.php?t=95624"},{"title":"Box2D: Collision Module","url":"https://box2d.org/doc_version_2_4/md__e_1_2github_2box2d__24_2docs_2collision.html"},{"title":"Allow bodies to overlap while detecting contacts with sensors - Box2D for Flash Games [Book]","url":"https://www.oreilly.com/library/view/box2d-for-flash/9781849519625/ch08s03.html"},{"title":"Box2D: Overview","url":"https://box2d.org/documentation/"},{"title":"Box2D: Migration Guide","url":"https://box2d.org/documentation/md_migration.html"}]

Based on the search results, here's what I found about the Box2D 3 `b2Shape_GetSensorOverlaps` API for getting current overlaps:

## Box2D 3 Sensor Overlap API

### Getting Current Overlaps

Sensors produce reliable begin and end touch events and you can also access the current overlaps on a sensor shape.(no content)This system is multithreaded and deterministic.

### Key Functions

1. **`b2Shape_GetSensorCapacity`**
   - Get the maximum capacity required for retrieving all the overlapped shapes on a sensor shape. This returns 0 if the provided shape is not a sensor. Returns the required capacity to get all the overlaps in `b2Shape_GetSensorOverlaps`.

2. **`b2Shape_GetSensorOverlaps`**
   - Get the overlap data for a sensor shape. Takes a shapeId (the id of a sensor shape), visitorIds (a user allocated array that is filled with the overlapping shapes/visitors), and capacity (the capacity of overlappedShapes).
   - Returns the number of elements filled in the provided array. Warning: do not ignore the return value, it specifies the valid number of elements. Overlaps may contain destroyed shapes so use `b2Shape_IsValid` to confirm each overlap.

### Important Notes

- Contacts are not created until the next world step. Sensor overlap state is also not updated until the next world step.

- The new sensor system now runs at the end of the update, so the overlap events are not delayed.

- Sensor events are only enabled for shapes and sensors if `b2ShapeDef::enableSensorEvents` is set to true.

- A shape cannot start or stop being a sensor. Such a feature would break sensor events, potentially causing bugs in game logic.
... [3 more lines]

# Box2D v2.4 to v3.0 Migration Summary

## Language & Architecture Shift
Box2D v3.0 represents a complete rewrite moving from C++ to C. This fundamental change impacts how developers interact with the entire API.

## ID-Based System Replaces Pointers
The most significant architectural change is replacing pointer-based object references with opaque handle identifiers:

- Bodies, shapes, joints, worlds, and chains now use ID types (`b2WorldId`, `b2BodyId`, `b2ShapeId`, etc.)
- IDs should be "treated as atomic objects, like `int` or `float`" and passed by value
- IDs contain implicit world information—destroying a body requires only the body ID, not the world reference
- Null checking uses `b2_nullBodyId` style constants and `B2_IS_NULL` macros instead of nullptr comparisons

## Initialization Pattern Changes
All structures must be explicitly initialized using helper functions:

- `b2DefaultWorldDef()`, `b2DefaultBodyDef()`, `b2DefaultShapeDef()` replace constructor defaults
- C lacks constructors, so "you need to initialize **ALL** structures" passed to Box2D
- Vector initialization uses curly-brace syntax: `{0.0f, 4.0f}`

## Shape Management Overhaul
The fixture concept has been eliminated entirely:

- `b2Fixture` is gone, simplifying the API
- Shapes attach directly to bodies with dedicated creation functions (`b2CreatePolygonShape`, `b2CreateCircleShape`)
- Default density changed from 0 to 1, allowing "an entire game without touching the density"
- Chains became independent objects with their own ID (`b2ChainId`) rather than shape variants

## Joint System Refinements
- Joint creation follows the ID pattern with dedicated functions (`b2CreateRevoluteJoint`)
... [32 more lines]

# Box2D Body Functions Reference

## Body Creation and Destruction

**b2CreateBody()** - Creates a rigid body from a definition. The definition is not retained, so it can be stack-allocated.

**b2DestroyBody()** - Destroys a body and all attached shapes and joints.

**b2DefaultBodyDef()** - Initializes a body definition with default values.

## Body Validation

**b2Body_IsValid()** - Validates a body identifier, detecting orphaned IDs up to 64K allocations.

## Body Type Management

**b2Body_GetType()** - Retrieves the body's type (static, kinematic, or dynamic).

**b2Body_SetType()** - Changes body type. This is expensive and automatically updates mass properties.

Body types available:
- `b2_staticBody` - Zero mass/velocity, manual movement only
- `b2_kinematicBody` - Zero mass, user-set velocity
- `b2_dynamicBody` - Positive mass, force-determined motion

## Transform and Position

**b2Body_GetPosition()** - Returns world position of the body origin.

**b2Body_GetRotation()** - Returns rotation as a cosine/sine pair.
... [146 more lines]

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# Box2D ID Type Definitions

## Struct Definitions

**b2WorldId** - References a world instance
```c
typedef struct b2WorldId {
    uint16_t index1;
    uint16_t generation;
} b2WorldId;
```

**b2BodyId** - References a body instance
```c
typedef struct b2BodyId {
    int32_t index1;
    uint16_t world0;
    uint16_t generation;
} b2BodyId;
```

**b2ShapeId** - References a shape instance
```c
typedef struct b2ShapeId {
    int32_t index1;
    uint16_t world0;
    uint16_t generation;
} b2ShapeId;
```

... [49 more lines]

1→# Box2D 3.x Research & Anchor Physics API Proposal
     2→
     3→## Box2D 3.x Research Summary
     4→
     5→### Key Architectural Differences from Box2D 2.x
     6→
     7→1. **ID-based handles** instead of pointers (`b2BodyId`, `b2ShapeId`, etc.)
     8→2. **Events instead of callbacks** - retrieved after `b2World_Step()`, not during
     9→3. **No fixtures** - shapes attach directly to bodies
    10→4. **64-bit filter categories/masks** - massive increase from 16-bit
    11→5. **Sub-stepping** - `b2World_Step(worldId, timeStep, subStepCount)` instead of iterations
    12→6. **Deterministic multithreading** - events are buffered safely
    13→7. **Sensors queryable** - can get current overlaps, not just begin/end events
    14→
    15→### Event Types
    16→- **SensorBeginTouchEvent/SensorEndTouchEvent** - overlap detection
    17→- **ContactBeginTouchEvent/ContactEndTouchEvent** - physical collision
    18→- **ContactHitEvent** - high-speed impact with `approachSpeed`
    19→- Events must be explicitly enabled per-shape via `enableSensorEvents`, `enableContactEvents`, `enableHitEvents`
    20→
    21→### Spatial Queries
    22→- `b2World_CastRayClosest()` - returns first hit
    23→- `b2World_CastRay()` - callback for all hits
    24→- `b2World_OverlapAABB()` - callback for shapes in rectangle
    25→- `b2World_OverlapShape()` - callback for shapes overlapping arbitrary shape
    26→- All queries use `b2QueryFilter` with `categoryBits`/`maskBits`
    27→
    28→---
    29→
    30→## Proposed Anchor Physics API
... [262 more lines]

The file E:\a327ex\Anchor\reference\box2d-3-api-proposal.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→# Box2D 3.x Research & Anchor Physics API Proposal
     2→
     3→## Box2D 3.x Research Summary
     4→
     5→### Key Architectural Differences from Box2D 2.x
     6→
     7→1. **ID-based handles** instead of pointers (`b2BodyId`, `b2ShapeId`, etc.)
     8→2. **Events instead of callbacks** - retrieved after `b2World_Step()`, not during
     9→3. **No fixtures** - shapes attach directly to bodies
    10→4. **64-bit filter categories/masks** - massive increase from 16-bit
    11→5. **Sub-stepping** - `b2World_Step(worldId, timeStep, subStepCount)` instead of iterations
    12→6. **Deterministic multithreading** - events are buffered safely
    13→7. **Sensors queryable** - can get current overlaps, not just begin/end events
    14→
    15→### Box2D ID Structure
    16→
    17→Box2D 3.x IDs are small structs (8 bytes) containing index, world reference, and generation counter:
    18→
    19→```c
    20→typedef struct b2BodyId {
    21→    int32_t index1;      // internal index
    22→    uint16_t world0;     // world reference
    23→    uint16_t generation; // version for stale detection
    24→} b2BodyId;
    25→```
    26→
    27→These can be stored directly in Lua userdata - no internal mapping array needed.
    28→
    29→### Event Types
... [313 more lines]

The file E:\a327ex\Anchor\reference\box2d-3-api-proposal.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   308→- All Lua positions/velocities are in pixels
   309→- Convert: `meters = pixels / PIXELS_PER_METER`
   310→- This keeps gameplay code intuitive while Box2D stays in its happy range
   311→
   312→### Body/Shape IDs
   313→- Box2D returns `b2BodyId`/`b2ShapeId` structs
   314→- Pass directly to Lua as userdata, Lua passes back, use directly with Box2D
   315→- No transformation, no mapping - just pass through
   316→- Box2D handles validation via `b2Body_IsValid()`, `b2Shape_IsValid()`
   317→
   318→### Event buffering
   319→- After `b2World_Step()`, iterate all events and store them in arrays keyed by tag pairs
   320→- Events cleared at start of next frame

The file E:\a327ex\Anchor\reference\box2d-3-api-proposal.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    43→---
    44→
    45→## Proposed Anchor Physics API
    46→
    47→### Design Philosophy
    48→
    49→1. **Tag-based collision** - strings for readability, mapped internally to bit categories
    50→2. **Events are per-frame arrays** - query after update, not callbacks
    51→3. **Meter scaling handled internally** - Lua works in pixels, C converts to meters
    52→4. **Pass-through IDs** - Box2D ID structs passed directly to/from Lua as userdata, no transformation
    53→
    54→---
    55→
    56→### World Setup

990→## Phase 7: Physics
   991→
   992→**Goal:** Box2D 3.1 with sensor/contact events and spatial queries.
   993→
   994→### 7.1 World Setup
   995→- [ ] Box2D world creation
   996→- [ ] Gravity configuration
   997→- [ ] Fixed timestep stepping (synced with game loop)
   998→- [ ] Configurable pixel-to-meter scale (check old Anchor values for reference)
   999→
  1000→### 7.2 Body Management
  1001→- [ ] Body creation: static, dynamic, kinematic
  1002→- [ ] Shape types: circle, rectangle, polygon
  1003→- [ ] Return body ID to Lua (Lua manages lifetime)
  1004→
  1005→### 7.3 Collision Configuration
  1006→- [ ] Collision tag system (string API for readability, maps to Box2D internally)
  1007→- [ ] Enable/disable contact between tag pairs
  1008→- [ ] Enable/disable sensor between tag pairs
  1009→
  1010→**Note:** Start with collision detection only. Add joints (hinges, ropes, etc.) if/when needed for specific games.
  1011→
  1012→### 7.4 Event System
  1013→Box2D 3.1 provides:
  1014→- **Sensor events** — overlap detection, no physics response
  1015→- **Contact events** — physical collision with response
  1016→- **Hit events** — high-speed impact data
  1017→
  1018→Implementation:
  1019→- [ ] Buffer sensor enter/exit events per frame
... [50 more lines]

The file E:\a327ex\Anchor\docs\ANCHOR_IMPLEMENTATION_PLAN.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   986→**Deliverable:** Audio with pitch shifting, separate volume controls, and perceptual scaling. ✓ Complete
   987→
   988→---
   989→
   990→## Phase 7: Physics
   991→
   992→**Goal:** Box2D 3.x integration with tag-based collision filtering, events, and spatial queries.
   993→
   994→See `reference/box2d-3-api-proposal.md` for full API design and Box2D 3.x research.
   995→
   996→---
   997→
   998→### Implementation Steps
   999→
  1000→**Step 1: Box2D integration**
  1001→- [ ] Download Box2D 3.x source from GitHub
  1002→- [ ] Add to `engine/include/` (header-only or compiled as needed)
  1003→- [ ] Update `build.bat` to compile/link Box2D
  1004→- [ ] Update `build-web.sh` for Emscripten compatibility
  1005→- [ ] Verify compilation on Windows and Web
  1006→
  1007→**Step 2: World setup**
  1008→- [ ] `physics_init()` — create `b2WorldId` with `b2DefaultWorldDef()`
  1009→- [ ] `physics_set_gravity(gx, gy)` — set gravity in pixels/sec² (convert to meters internally)
  1010→- [ ] `physics_set_meter_scale(scale)` — configure pixels-per-meter (default 64)
  1011→- [ ] Integrate `b2World_Step()` into main loop (use existing 120Hz physics rate)
  1012→- [ ] `physics_set_enabled(bool)` — pause/resume simulation
  1013→- [ ] Cleanup on shutdown
  1014→
... [175 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

total 4236
drwxr-xr-x 1 adn 197121       0 Jan  9 05:28 ./
drwxr-xr-x 1 adn 197121       0 Jan  9 06:03 ../
drwxr-xr-x 1 adn 197121       0 Jan  5 07:57 glad/
drwxr-xr-x 1 adn 197121       0 Jan  5 07:57 KHR/
drwxr-xr-x 1 adn 197121       0 Jan  5 07:55 lua/
-rw-r--r-- 1 adn 197121 4099492 Jan  8 20:57 miniaudio.h
drwxr-xr-x 1 adn 197121       0 Jan  5 07:54 SDL2/
drwxr-xr-x 1 adn 197121       0 Jan  5 07:58 stb/
-rw-r--r-- 1 adn 197121  192790 Jan  9 05:28 stb_vorbis.c

1→#!/bin/bash
     2→# Anchor Engine - Web Build (Emscripten)
     3→# Usage: ./build-web.sh <game-folder>
     4→# Example: ./build-web.sh ../test
     5→
     6→cd "$(dirname "$0")"
     7→
     8→# Check for game folder argument
     9→if [ -z "$1" ]; then
    10→    echo "Usage: ./build-web.sh <game-folder>"
    11→    echo "Example: ./build-web.sh ../test"
    12→    exit 1
    13→fi
    14→
    15→GAME_FOLDER="$1"
    16→
    17→if [ ! -d "$GAME_FOLDER" ]; then
    18→    echo "Error: Game folder not found: $GAME_FOLDER"
    19→    exit 1
    20→fi
    21→
    22→if [ ! -f "$GAME_FOLDER/main.lua" ]; then
    23→    echo "Error: main.lua not found in $GAME_FOLDER"
    24→    exit 1
    25→fi
    26→
    27→echo "Building with game folder: $GAME_FOLDER"
    28→
    29→# Create build directory
    30→mkdir -p build-web
... [34 more lines]

# Box2D 3.x Directory Structure & Integration

## Directory Organization

Based on the repository listing, Box2D 3.x contains these main folders:

- **`src/`** — Core library source code
- **`include/box2d/`** — Public header files
- **`samples/`** — Example applications demonstrating features
- **`test/`** — Test suite
- **`benchmark/`** — Performance benchmarking tools
- **`docs/`** — Documentation
- **`extern/`** — External dependencies
- **`shared/`** — Shared utilities

## Source File Count

The repository metadata indicates 1,352 total commits across the project history, but the exact number of `.c` source files isn't explicitly stated in the provided content. The language breakdown shows the codebase is "C 98.9%," indicating a C-based implementation.

## Single-File Amalgamation

No mention of an amalgamated single-file distribution appears in the README or overview content provided.

## Recommended Integration Method

The official approach uses **CMake**:

1. Create a `build` directory
2. Run `cmake ..`
3. Build with `cmake --build . --config Release`
... [3 more lines]

# Box2D Source Files (.c files)

Based on the GitHub repository content, here are all the C source files in the `src` directory:

1. aabb.c
2. arena_allocator.c
3. array.c
4. bitset.c
5. body.c
6. broad_phase.c
7. constraint_graph.c
8. contact.c
9. contact_solver.c
10. core.c
11. distance.c
12. distance_joint.c
13. dynamic_tree.c
14. geometry.c
15. hull.c
16. id_pool.c
17. island.c
18. joint.c
19. manifold.c
20. math_functions.c
21. motor_joint.c
22. mover.c
23. physics_world.c
24. prismatic_joint.c
25. revolute_joint.c
26. sensor.c
... [10 more lines]

# Box2D Header Files in include/box2d

Based on the GitHub repository content, the header files (.h) in the `include/box2d` directory are:

1. **base.h**
2. **box2d.h**
3. **collision.h**
4. **id.h**
5. **math_functions.h**
6. **types.h**

These six header files comprise the public API interface for the Box2D physics engine library.

Cloning into 'box2d'...

total 1102
drwxr-xr-x 1 adn 197121    0 Jan  9 06:54 ./
drwxr-xr-x 1 adn 197121    0 Jan  9 06:54 ../
-rw-r--r-- 1 adn 197121 1180 Jan  9 06:54 .clang-format
drwxr-xr-x 1 adn 197121    0 Jan  9 06:54 .git/
-rw-r--r-- 1 adn 197121  104 Jan  9 06:54 .gitattributes
drwxr-xr-x 1 adn 197121    0 Jan  9 06:54 .github/
-rw-r--r-- 1 adn 197121  106 Jan  9 06:54 .gitignore
drwxr-xr-x 1 adn 197121    0 Jan  9 06:54 benchmark/
-rwxr-xr-x 1 adn 197121  302 Jan  9 06:54 build.sh*
-rwxr-xr-x 1 adn 197121  257 Jan  9 06:54 build_emscripten.sh*
-rw-r--r-- 1 adn 197121 5005 Jan  9 06:54 CMakeLists.txt
-rw-r--r-- 1 adn 197121  110 Jan  9 06:54 create_sln.bat
-rwxr-xr-x 1 adn 197121  112 Jan  9 06:54 deploy_docs.sh*
drwxr-xr-x 1 adn 197121    0 Jan  9 06:54 docs/
drwxr-xr-x 1 adn 197121    0 Jan  9 06:54 extern/
drwxr-xr-x 1 adn 197121    0 Jan  9 06:54 include/
-rw-r--r-- 1 adn 197121 1088 Jan  9 06:54 LICENSE
-rw-r--r-- 1 adn 197121 3485 Jan  9 06:54 README.md
drwxr-xr-x 1 adn 197121    0 Jan  9 06:54 samples/
drwxr-xr-x 1 adn 197121    0 Jan  9 06:54 shared/
drwxr-xr-x 1 adn 197121    0 Jan  9 06:54 src/
drwxr-xr-x 1 adn 197121    0 Jan  9 06:54 test/

total 188
drwxr-xr-x 1 adn 197121     0 Jan  9 06:54 ./
drwxr-xr-x 1 adn 197121     0 Jan  9 06:54 ../
-rw-r--r-- 1 adn 197121  4635 Jan  9 06:54 base.h
-rw-r--r-- 1 adn 197121 58007 Jan  9 06:54 box2d.h
-rw-r--r-- 1 adn 197121 32795 Jan  9 06:54 collision.h
-rw-r--r-- 1 adn 197121  5484 Jan  9 06:54 id.h
-rw-r--r-- 1 adn 197121 21040 Jan  9 06:54 math_functions.h
-rw-r--r-- 1 adn 197121 49090 Jan  9 06:54 types.h

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

56
aabb.c
aabb.h
arena_allocator.c
arena_allocator.h
array.c
array.h
atomic.h
bitset.c
bitset.h
body.c
body.h
broad_phase.c
broad_phase.h
constants.h
constraint_graph.c
constraint_graph.h
contact.c
contact.h
contact_solver.c
contact_solver.h
core.c
core.h
ctz.h
distance.c
distance_joint.c
dynamic_tree.c
geometry.c
hull.c
id_pool.c
... [27 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

<tool_use_error>File does not exist.</tool_use_error>

<tool_use_error>File does not exist.</tool_use_error>

1→// SPDX-FileCopyrightText: 2023 Erin Catto
     2→// SPDX-License-Identifier: MIT
     3→
     4→#pragma once
     5→
     6→#include <stdint.h>
     7→
     8→// clang-format off
     9→// 
    10→// Shared library macros
    11→#if defined( _MSC_VER ) && defined( box2d_EXPORTS )
    12→   // build the Windows DLL
    13→   #define BOX2D_EXPORT __declspec( dllexport )
    14→#elif defined( _MSC_VER ) && defined( BOX2D_DLL )
    15→   // using the Windows DLL
    16→   #define BOX2D_EXPORT __declspec( dllimport )
    17→#elif defined( box2d_EXPORTS )
    18→   // building or using the shared library
    19→   #define BOX2D_EXPORT __attribute__( ( visibility( "default" ) ) )
    20→#else
    21→   // static library
    22→   #define BOX2D_EXPORT
    23→#endif
    24→
    25→// C++ macros
    26→#ifdef __cplusplus
    27→   #define B2_API extern "C" BOX2D_EXPORT
    28→   #define B2_INLINE inline
    29→   #define B2_LITERAL(T) T
    30→   #define B2_ZERO_INIT {}
... [110 more lines]

aabb.c
arena_allocator.c
array.c
bitset.c
body.c
broad_phase.c
constraint_graph.c
contact.c
contact_solver.c
core.c
distance.c
distance_joint.c
dynamic_tree.c
geometry.c
hull.c
id_pool.c
island.c
joint.c
manifold.c
math_functions.c
motor_joint.c
mover.c
physics_world.c
prismatic_joint.c
revolute_joint.c
sensor.c
shape.c
solver.c
solver_set.c
table.c
... [4 more lines]

The file E:\a327ex\Anchor\engine\build.bat has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    18→)
    19→
    20→if not exist build mkdir build
    21→
    22→:: Build Lua library if it doesn't exist
    23→if not exist lib\lua.lib (
    24→    echo Building Lua library...
    25→    if not exist build\lua_obj mkdir build\lua_obj
    26→    cl.exe /nologo /O2 /W3 /c /I"include/lua" ^
    27→        include/lua/lapi.c include/lua/lauxlib.c include/lua/lbaselib.c ^
    28→        include/lua/lcode.c include/lua/lcorolib.c include/lua/lctype.c ^
    29→        include/lua/ldblib.c include/lua/ldebug.c include/lua/ldo.c ^
    30→        include/lua/ldump.c include/lua/lfunc.c include/lua/lgc.c ^
    31→        include/lua/linit.c include/lua/liolib.c include/lua/llex.c ^
    32→        include/lua/lmathlib.c include/lua/lmem.c include/lua/loadlib.c ^
    33→        include/lua/lobject.c include/lua/lopcodes.c include/lua/loslib.c ^
    34→        include/lua/lparser.c include/lua/lstate.c include/lua/lstring.c ^
    35→        include/lua/lstrlib.c include/lua/ltable.c include/lua/ltablib.c ^
    36→        include/lua/ltm.c include/lua/lundump.c include/lua/lutf8lib.c ^
    37→        include/lua/lvm.c include/lua/lzio.c ^
    38→        /Fo"build\lua_obj\\"
    39→    if %ERRORLEVEL% neq 0 (
    40→        echo Lua build failed!
    41→        exit /b 1
    42→    )
    43→    lib.exe /nologo /out:lib\lua.lib build\lua_obj\*.obj
    44→    if %ERRORLEVEL% neq 0 (
    45→        echo Lua library creation failed!
    46→        exit /b 1
... [39 more lines]

The file E:\a327ex\Anchor\engine\build.bat has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    79→    rmdir /s /q build\box2d_obj
    80→    echo Box2D library built.
    81→)
    82→
    83→:: Build anchor (static linking - no DLLs needed)
    84→cl.exe /nologo /O2 /W3 ^
    85→    /I"include" /I"include/SDL2" /I"include/lua" /I"include/glad" /I"include/KHR" /I"include/stb" /I"include/box2d" ^
    86→    src/anchor.c include/glad/gl.c ^
    87→    /Fe"build/anchor.exe" ^
    88→    /link /LIBPATH:"lib" ^
    89→    lua.lib box2d.lib SDL2-static.lib SDL2main.lib ^
    90→    opengl32.lib kernel32.lib user32.lib gdi32.lib winmm.lib imm32.lib ^
    91→    ole32.lib oleaut32.lib version.lib uuid.lib advapi32.lib setupapi.lib shell32.lib ^
    92→    /SUBSYSTEM:CONSOLE
    93→
    94→if %ERRORLEVEL% neq 0 (
    95→    echo Build failed!
    96→    exit /b 1

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

The file E:\a327ex\Anchor\engine\build-web.sh has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    36→# -s WASM=1: Output WebAssembly
    37→# -s ALLOW_MEMORY_GROWTH=1: Allow heap to grow
    38→# --preload-file: Bundle game folder into virtual filesystem at root
    39→
    40→/c/emsdk/upstream/emscripten/emcc.bat \
    41→    -O2 \
    42→    -DNDEBUG \
    43→    -I"include" -I"include/SDL2" -I"include/lua" -I"include/stb" -I"include/box2d" -I"src/box2d" \
    44→    src/anchor.c \
    45→    include/lua/*.c \
    46→    src/box2d/*.c \
    47→    -o build-web/anchor.html \
    48→    -s USE_SDL=2 \
    49→    -s USE_WEBGL2=1 \
    50→    -s FULL_ES3=1 \
    51→    -s WASM=1 \
    52→    -s ALLOW_MEMORY_GROWTH=1 \
    53→    -s EXPORTED_RUNTIME_METHODS='["ccall","cwrap"]' \
    54→    --preload-file "$GAME_FOLDER"@/ \
    55→    --shell-file shell.html \
    56→    --emrun
    57→
    58→if [ $? -eq 0 ]; then
    59→    echo "Build successful: build-web/anchor.html"
    60→    echo "To test: cd build-web && python -m http.server 8000"

The file E:\a327ex\Anchor\engine\build.bat has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    48→    rmdir /s /q build\lua_obj
    49→    echo Lua library built.
    50→)
    51→
    52→:: Build Box2D library if it doesn't exist
    53→if not exist lib\box2d.lib (
    54→    echo Building Box2D library...
    55→    if not exist build\box2d_obj mkdir build\box2d_obj
    56→    cl.exe /nologo /O2 /W3 /c /DNDEBUG /I"include" /I"include/box2d" ^
    57→        include/box2d/aabb.c include/box2d/arena_allocator.c include/box2d/array.c ^
    58→        include/box2d/bitset.c include/box2d/body.c include/box2d/broad_phase.c ^
    59→        include/box2d/constraint_graph.c include/box2d/contact.c include/box2d/contact_solver.c ^
    60→        include/box2d/core.c include/box2d/distance.c include/box2d/distance_joint.c ^
    61→        include/box2d/dynamic_tree.c include/box2d/geometry.c include/box2d/hull.c ^
    62→        include/box2d/id_pool.c include/box2d/island.c include/box2d/joint.c ^
    63→        include/box2d/manifold.c include/box2d/math_functions.c include/box2d/motor_joint.c ^
    64→        include/box2d/mover.c include/box2d/physics_world.c include/box2d/prismatic_joint.c ^
    65→        include/box2d/revolute_joint.c include/box2d/sensor.c include/box2d/shape.c ^
    66→        include/box2d/solver.c include/box2d/solver_set.c include/box2d/table.c ^
    67→        include/box2d/timer.c include/box2d/types.c include/box2d/weld_joint.c ^
    68→        include/box2d/wheel_joint.c ^
    69→        /Fo"build\box2d_obj\\"
    70→    if %ERRORLEVEL% neq 0 (
    71→        echo Box2D build failed!
    72→        exit /b 1
    73→    )

The file E:\a327ex\Anchor\engine\build-web.sh has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    39→
    40→/c/emsdk/upstream/emscripten/emcc.bat \
    41→    -O2 \
    42→    -DNDEBUG \
    43→    -I"include" -I"include/SDL2" -I"include/lua" -I"include/stb" -I"include/box2d" \
    44→    src/anchor.c \
    45→    include/lua/*.c \
    46→    include/box2d/*.c \
    47→    -o build-web/anchor.html \
    48→    -s USE_SDL=2 \
    49→    -s USE_WEBGL2=1 \
    50→    -s FULL_ES3=1 \

aabb.c
aabb.h
arena_allocator.c
arena_allocator.h
array.c
array.h
atomic.h
base.h
bitset.c
bitset.h
body.c
body.h
box2d.h
broad_phase.c
broad_phase.h
collision.h
constants.h
constraint_graph.c
constraint_graph.h
contact.c

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

Building Box2D library...
aabb.c
arena_allocator.c
array.c
bitset.c
body.c
broad_phase.c
include/box2d/broad_phase.c(29): warning C4013: '_Static_assert' undefined; assuming extern returning int
constraint_graph.c
include/box2d/constraint_graph.c(31): warning C4013: '_Static_assert' undefined; assuming extern returning int
contact.c
contact_solver.c
include/box2d/contact_solver.c(1311): warning C4013: '_Static_assert' undefined; assuming extern returning int
core.c
distance.c
distance_joint.c
dynamic_tree.c
geometry.c
include/box2d/geometry.c(13): error C2143: syntax error: missing ')' before 'constant'
include/box2d/geometry.c(13): error C2143: syntax error: missing '{' before 'constant'
include/box2d/geometry.c(13): error C2059: syntax error: 'constant'
include/box2d/geometry.c(13): error C2059: syntax error: ')'
hull.c
id_pool.c
island.c
joint.c
manifold.c
math_functions.c
include/box2d/math_functions.c(8): error C2143: syntax error: missing ')' before 'sizeof'
include/box2d/math_functions.c(8): error C2143: syntax error: missing '{' before 'sizeof'
... [44 more lines]

The file E:\a327ex\Anchor\engine\build.bat has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    52→:: Build Box2D library if it doesn't exist
    53→if not exist lib\box2d.lib (
    54→    echo Building Box2D library...
    55→    if not exist build\box2d_obj mkdir build\box2d_obj
    56→    cl.exe /nologo /O2 /W3 /c /std:c17 /DNDEBUG /I"include" /I"include/box2d" ^
    57→        include/box2d/aabb.c include/box2d/arena_allocator.c include/box2d/array.c ^
    58→        include/box2d/bitset.c include/box2d/body.c include/box2d/broad_phase.c ^
    59→        include/box2d/constraint_graph.c include/box2d/contact.c include/box2d/contact_solver.c ^
    60→        include/box2d/core.c include/box2d/distance.c include/box2d/distance_joint.c ^

Building Box2D library...
aabb.c
arena_allocator.c
array.c
bitset.c
body.c
broad_phase.c
constraint_graph.c
contact.c
contact_solver.c
core.c
distance.c
distance_joint.c
dynamic_tree.c
geometry.c
hull.c
id_pool.c
island.c
joint.c
manifold.c
math_functions.c
Generating Code...
Compiling...
motor_joint.c
mover.c
physics_world.c
prismatic_joint.c
revolute_joint.c
sensor.c
shape.c
... [25 more lines]

1→print("main.lua loaded - Audio Test (Phase 6)")
     2→
     3→set_shape_filter("rough")
     4→
     5→local screen_w, screen_h = 480, 270
     6→
     7→-- Load sound and music
     8→local hit = sound_load('assets/player_death.ogg')
     9→local bgm = music_load('assets/Recettear OST - Closed Shop.ogg')
    10→print("Sound and music loaded!")
    11→
    12→-- Background layer
    13→local game_layer = layer_create('game')
    14→local bg_color = rgba(48, 49, 50, 255)
    15→local white = rgba(255, 255, 255, 255)
    16→
    17→-- Moving ball
    18→local ball_x = screen_w / 2
    19→local ball_y = screen_h / 2
    20→local ball_vx = 100
    21→local ball_vy = 80
    22→
    23→-- Master pitch state
    24→local master_pitch = 1.0
    25→
    26→-- Volume oscillation state
    27→local volume_time = 0
    28→local cycle_duration = 10  -- 5 seconds up, 5 seconds down
    29→
    30→function update(dt)
... [79 more lines]

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→print("main.lua loaded - Physics Test (Phase 7)")
     2→
     3→set_shape_filter("rough")
     4→
     5→local screen_w, screen_h = 480, 270
     6→local game_layer = layer_create('game')
     7→local bg_color = rgba(30, 30, 35, 255)
     8→local white = rgba(255, 255, 255, 255)
     9→
    10→-- Simple bouncing ball (no physics yet - just verifying engine still works)
    11→local ball_x = screen_w / 2
    12→local ball_y = screen_h / 2
    13→local ball_vx = 120
    14→local ball_vy = 80
    15→
    16→function update(dt)
    17→    -- Update ball position
    18→    ball_x = ball_x + ball_vx * dt
    19→    ball_y = ball_y + ball_vy * dt
    20→
    21→    -- Bounce off walls
    22→    if ball_x < 20 or ball_x > screen_w - 20 then ball_vx = -ball_vx end
    23→    if ball_y < 20 or ball_y > screen_h - 20 then ball_vy = -ball_vy end
    24→
    25→    -- Draw
    26→    layer_rectangle(game_layer, 0, 0, screen_w, screen_h, bg_color)
    27→    layer_circle(game_layer, ball_x, ball_y, 20, white)
    28→end
    29→

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

Exit code 1
In file included from src/anchor.c:4023:
include\stb_vorbis.c:1404:75: warning: pointer comparison always evaluates to false [-Wtautological-compare]
 1404 |       if (f->stream_start + loc >= f->stream_end || f->stream_start + loc < f->stream_start) {
      |                                                                           ^
1 warning generated.
In file included from include/box2d/contact_solver.c:554:
C:\emsdk\upstream\emscripten\cache\sysroot/include\compat\emmintrin.h:11:2: error: "SSE2 instruction set not enabled"
   11 | #error "SSE2 instruction set not enabled"
      |  ^
In file included from include/box2d/contact_solver.c:554:
In file included from C:\emsdk\upstream\emscripten\cache\sysroot/include\compat\emmintrin.h:14:
C:\emsdk\upstream\emscripten\cache\sysroot/include\compat\xmmintrin.h:17:2: error: "SSE instruction set not enabled"
   17 | #error "SSE instruction set not enabled"
      |  ^
2 errors generated.
emcc: error: ''C:/emsdk/upstream/bin\clang.exe' -target wasm32-unknown-emscripten -fignore-exceptions -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr '--sysroot=C:\emsdk\upstream\emscripten\cache\sysroot' -DEMSCRIPTEN -isystem 'C:\emsdk\upstream\emscripten\cache\sysroot\include\SDL2' -Xclang '-iwithsysroot/include\compat' -O2 -DNDEBUG -Iinclude -Iinclude/SDL2 -Iinclude/lua -Iinclude/stb -Iinclude/box2d -c include/box2d/contact_solver.c -o 'C:\Users\adn\AppData\Local\Temp\emscripten_temp_9tcsoa8k\contact_solver.o'' failed (returned 1)

Building with game folder: ../test
Build failed!

E:/a327ex/Anchor/engine/include/box2d/arena_allocator.c: B2_ASSERT( capacity >= 0 );
E:/a327ex/Anchor/engine/include/box2d/arena_allocator.c:    // ensure allocation is 32 byte aligned to support 256-bit SIMD
E:/a327ex/Anchor/engine/include/box2d/arena_allocator.c:        B2_ASSERT( ( (uintptr_t)entry.data & 0x1F ) == 0 );
E:/a327ex/Anchor/engine/include/box2d/arena_allocator.c:        B2_ASSERT( ( (uintptr_t)entry.data & 0x1F ) == 0 );
E:/a327ex/Anchor/engine/include/box2d/arena_allocator.c:    B2_ASSERT( entryCount > 0 );
E:/a327ex/Anchor/engine/include/box2d/arena_allocator.c:    B2_ASSERT( mem == entry->data );
E:/a327ex/Anchor/engine/include/box2d/arena_allocator.c:    B2_ASSERT( alloc->allocation == 0 );
E:/a327ex/Anchor/engine/include/box2d/arena_allocator.h:// You must nest allocate/free pairs. The code will B2_ASSERT
E:/a327ex/Anchor/engine/include/box2d/array.h:      B2_ASSERT( 0 <= index && index < a->count );                                                                             \
E:/a327ex/Anchor/engine/include/box2d/array.h:      B2_ASSERT( 0 <= index && index < a->count );                                                                             \
E:/a327ex/Anchor/engine/include/box2d/array.h:      B2_ASSERT( 0 <= index && index < a->count );                                                                             \
E:/a327ex/Anchor/engine/include/box2d/array.h:      B2_ASSERT( a->count > 0 );                                                                                               \
E:/a327ex/Anchor/engine/include/box2d/base.h:#if !defined( NDEBUG ) || defined( B2_ENABLE_ASSERT )
E:/a327ex/Anchor/engine/include/box2d/base.h:#define B2_ASSERT( condition )                                                                                                   \
E:/a327ex/Anchor/engine/include/box2d/base.h:#define B2_ASSERT( ... ) ( (void)0 )
E:/a327ex/Anchor/engine/include/box2d/bitset.c: B2_ASSERT( blockCount > bitSet->blockCount );
E:/a327ex/Anchor/engine/include/box2d/bitset.c:     B2_ASSERT( bitSet->bits != NULL );
E:/a327ex/Anchor/engine/include/box2d/bitset.c: B2_ASSERT( setA->blockCount == setB->blockCount );
E:/a327ex/Anchor/engine/include/box2d/bitset.h: B2_ASSERT( blockIndex < bitSet->blockCount );
E:/a327ex/Anchor/engine/include/box2d/body.c:   B2_ASSERT( b2Body_IsValid( bodyId ) );
E:/a327ex/Anchor/engine/include/box2d/body.c:   B2_ASSERT( body->islandId == B2_NULL_INDEX );
E:/a327ex/Anchor/engine/include/box2d/body.c:   B2_ASSERT( body->islandPrev == B2_NULL_INDEX );
E:/a327ex/Anchor/engine/include/box2d/body.c:   B2_ASSERT( body->islandNext == B2_NULL_INDEX );
E:/a327ex/Anchor/engine/include/box2d/body.c:   B2_ASSERT( setIndex != b2_disabledSet );
E:/a327ex/Anchor/engine/include/box2d/body.c:       B2_ASSERT( body->islandPrev == B2_NULL_INDEX );
E:/a327ex/Anchor/engine/include/box2d/body.c:       B2_ASSERT( body->islandNext == B2_NULL_INDEX );
E:/a327ex/Anchor/engine/include/box2d/body.c:   B2_ASSERT( island->bodyCount > 0 );
E:/a327ex/Anchor/engine/include/box2d/body.c:           B2_ASSERT( island->tailBody == body->id );
E:/a327ex/Anchor/engine/include/box2d/body.c:           B2_ASSERT( island->bodyCount == 0 );
E:/a327ex/Anchor/engine/include/box2d/body.c:           B2_ASSERT( island->contactCount == 0 );

540:#include <immintrin.h>
554:#include <emmintrin.h>

530→       }
   531→
   532→       manifold->rollingImpulse = constraint->rollingImpulse;
   533→   }
   534→
   535→   b2TracyCZoneEnd( store_impulses );
   536→}
   537→
   538→#if defined( B2_SIMD_AVX2 )
   539→
   540→#include <immintrin.h>
   541→
   542→// wide float holds 8 numbers
   543→typedef __m256 b2FloatW;
   544→
   545→#elif defined( B2_SIMD_NEON )
   546→
   547→#include <arm_neon.h>
   548→
   549→// wide float holds 4 numbers
   550→typedef float32x4_t b2FloatW;
   551→
   552→#elif defined( B2_SIMD_SSE2 )
   553→
   554→#include <emmintrin.h>
   555→
   556→// wide float holds 4 numbers
   557→typedef __m128 b2FloatW;
   558→
   559→#else
... [10 more lines]

E:/a327ex/Anchor/engine/include/box2d/core.h:66:         #define B2_SIMD_AVX2
E:/a327ex/Anchor/engine/include/box2d/core.h:69:            #define B2_SIMD_SSE2
E:/a327ex/Anchor/engine/include/box2d/core.h:73:        #define B2_SIMD_NEON
E:/a327ex/Anchor/engine/include/box2d/core.h:77:        #define B2_SIMD_SSE2

Web search results for query: "Box2D 3 Emscripten WebAssembly SIMD disable build"

Links: [{"title":"Using SIMD with WebAssembly — Emscripten 4.0.23-git (dev) documentation","url":"https://emscripten.org/docs/porting/simd.html"},{"title":"Building box2d for wasm32 - #10 by danielchooper - Help - Ziggit","url":"https://ziggit.dev/t/building-box2d-for-wasm32/9760/10"},{"title":"GitHub - kripken/box2d.js: Port of Box2D to JavaScript using Emscripten","url":"https://github.com/kripken/box2d.js/"},{"title":"Building to WebAssembly — Emscripten 4.0.23-git (dev) documentation","url":"https://emscripten.org/docs/compiling/WebAssembly.html"},{"title":"GitHub - Birch-san/box2d3-wasm: Box2D v3 for the Web, using WASM + SIMD + Web Workers","url":"https://github.com/Birch-san/box2d3-wasm/"},{"title":"GitHub - Birch-san/box2d-wasm: Box2D physics engine compiled to WebAssembly. Supports TypeScript and ES modules.","url":"https://github.com/Birch-san/box2d-wasm"},{"title":"GitHub - mate-h/box2d-wasm: A WebAssembly build of the Box2D physics engine in Svelte.","url":"https://github.com/mate-h/box2d-wasm"},{"title":"Using SIMD with WebAssembly — Emscripten 3.1.66-git (dev) …","url":"https://emscripten.org/docs/porting/simd"},{"title":"Using SIMD with WebAssembly — Emscripten 4.0.11-git (dev) documentation","url":"https://emscripten.org/docs/porting/simd.html?highlight=simd"},{"title":"Building to WebAssembly — Emscripten 4.0.22-git (dev) documentation","url":"https://emscripten.org/docs/compiling/WebAssembly.html?highlight=exception"}]

Based on the search results, here's the relevant information about building Box2D 3 with Emscripten/WebAssembly and disabling SIMD:

## Key Findings

### Disabling SIMD in Box2D 3

When building Box2D 3 for WebAssembly, you can use the `-DBOX2D_DISABLE_SIMD` preprocessor flag to disable Box2D's built-in SIMD support. This is particularly useful when there are compatibility issues with certain toolchains.

Example build command from a Zig/Emscripten build:
```bash
zig build-lib $BOX2D_SRC_FILES \
  -DBOX2D_DISABLE_SIMD \
  -cflags -std=c17 -mbulk-memory -matomics -msimd128 -msse2 -- \
  -I$BOX2D_PATH/include \
  -lc -OReleaseFast --name box2d -static \
  -target wasm32-emscripten
```

### Emscripten SIMD Options

To enable SIMD in Emscripten, pass the WebAssembly-specific `-msimd128` flag at compile time.(no content)This will also turn on LLVM's autovectorization passes. If that is not desirable, additionally pass flags `-fno-vectorize -fno-slp-vectorize` to disable the autovectorizer.(no content)C/C++ code can use the built-in preprocessor define `#ifdef __wasm_simd128__` to detect when building with WebAssembly SIMD enabled.

### Existing Box2D 3 WASM Projects

There's a project called box2d3-wasm that provides "Box2D v3 for the Web, using WASM + SIMD + Web Workers" - this could be a useful reference for building Box2D 3 with Emscripten.

... [6 more lines]

The file E:\a327ex\Anchor\engine\build-web.sh has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    36→# -s WASM=1: Output WebAssembly
    37→# -s ALLOW_MEMORY_GROWTH=1: Allow heap to grow
    38→# --preload-file: Bundle game folder into virtual filesystem at root
    39→
    40→/c/emsdk/upstream/emscripten/emcc.bat \
    41→    -O2 \
    42→    -DNDEBUG \
    43→    -DBOX2D_DISABLE_SIMD \
    44→    -I"include" -I"include/SDL2" -I"include/lua" -I"include/stb" -I"include/box2d" \
    45→    src/anchor.c \
    46→    include/lua/*.c \
    47→    include/box2d/*.c \

Building with game folder: ../test
Build successful: build-web/anchor.html
To test: cd build-web && python -m http.server 8000
Then open: http://localhost:8000/anchor.html
In file included from src/anchor.c:4023:
include\stb_vorbis.c:1404:75: warning: pointer comparison always evaluates to false [-Wtautological-compare]
 1404 |       if (f->stream_start + loc >= f->stream_end || f->stream_start + loc < f->stream_start) {
      |                                                                           ^
1 warning generated.

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

1→/*
     2→ * Anchor Engine
     3→ * Phase 1: Window + OpenGL + Lua integration
     4→ * Phase 2: Web build (Emscripten/WebGL)
     5→ * Phase 3: Rendering (layers, shapes, sprites, transforms, blend modes)
     6→ */
     7→
     8→#include <stdio.h>
     9→#include <stdlib.h>
    10→#include <stdbool.h>
    11→#include <string.h>
    12→#include <math.h>
    13→
    14→#ifdef _WIN32
    15→#include <direct.h>  // _chdir
    16→#else
    17→#include <unistd.h>  // chdir
    18→#endif
    19→
    20→#include <SDL.h>
    21→
    22→#ifdef __EMSCRIPTEN__
    23→    #include <emscripten.h>
    24→    #include <emscripten/html5.h>
    25→    #include <GLES3/gl3.h>
    26→#else
    27→    #include <glad/gl.h>
    28→#endif
    29→
    30→#include <lua.h>
... [70 more lines]

151:static ma_engine audio_engine;
754:static lua_State* L = NULL;

145→
   146→    // Current state
   147→    uint8_t current_blend;
   148→} Layer;
   149→
   150→// Audio globals (declared early so Sound functions can use them)
   151→static ma_engine audio_engine;
   152→static bool audio_initialized = false;
   153→static float sound_master_volume = 1.0f;
   154→static float music_master_volume = 1.0f;
   155→static float audio_master_pitch = 1.0f;
   156→#ifdef __EMSCRIPTEN__
   157→static bool audio_needs_unlock = true;  // Web requires user interaction to start audio
   158→#endif
   159→
   160→// Texture
   161→typedef struct {
   162→    GLuint id;
   163→    int width;
   164→    int height;
   165→} Texture;
   166→
   167→// Load a texture from file using stb_image
   168→static Texture* texture_load(const char* path) {
   169→    int width, height, channels;
   170→    stbi_set_flip_vertically_on_load(0);  // Don't flip - we handle Y in our coordinate system
   171→    unsigned char* data = stbi_load(path, &width, &height, &channels, 4);  // Force RGBA
   172→    if (!data) {
   173→        fprintf(stderr, "Failed to load texture: %s\n", path);
   174→        return NULL;
... [50 more lines]

3407:static void engine_shutdown(void) {
3438:static void main_loop_iteration(void) {

3400→// Error handler that adds stack trace
  3401→static int traceback(lua_State* L) {
  3402→    const char* msg = lua_tostring(L, 1);
  3403→    luaL_traceback(L, L, msg, 1);
  3404→    return 1;
  3405→}
  3406→
  3407→static void engine_shutdown(void) {
  3408→    // Game rendering resources
  3409→    if (vbo) { glDeleteBuffers(1, &vbo); vbo = 0; }
  3410→    if (vao) { glDeleteVertexArrays(1, &vao); vao = 0; }
  3411→    if (shader_program) { glDeleteProgram(shader_program); shader_program = 0; }
  3412→    // Layers
  3413→    for (int i = 0; i < layer_count; i++) {
  3414→        layer_destroy(layer_registry[i]);
  3415→        free(layer_names[i]);
  3416→        layer_registry[i] = NULL;
  3417→        layer_names[i] = NULL;
  3418→    }
  3419→    layer_count = 0;
  3420→    // Screen blit resources
  3421→    if (screen_vbo) { glDeleteBuffers(1, &screen_vbo); screen_vbo = 0; }
  3422→    if (screen_vao) { glDeleteVertexArrays(1, &screen_vao); screen_vao = 0; }
  3423→    if (screen_shader) { glDeleteProgram(screen_shader); screen_shader = 0; }
  3424→    // Audio
  3425→    if (audio_initialized) {
  3426→        sound_cleanup_all();
  3427→        ma_engine_uninit(&audio_engine);
  3428→        audio_initialized = false;
  3429→    }
... [90 more lines]

3600→        // Update sequences (clear just_fired from last frame, check timeouts)
  3601→        sequences_update((float)game_time);
  3602→
  3603→        // Check which actions were pressed and notify sequences
  3604→        sequences_check_actions((float)game_time);
  3605→
  3606→        // Update holds (track how long actions have been held)
  3607→        holds_update((float)PHYSICS_RATE);
  3608→
  3609→        // Call Lua update (skip if in error state)
  3610→        if (!error_state) {
  3611→            lua_pushcfunction(L, traceback);
  3612→            int err_handler = lua_gettop(L);
  3613→            lua_getglobal(L, "update");
  3614→            if (lua_isfunction(L, -1)) {
  3615→                lua_pushnumber(L, PHYSICS_RATE);
  3616→                if (lua_pcall(L, 1, 0, err_handler) != LUA_OK) {
  3617→                    snprintf(error_message, sizeof(error_message), "%s", lua_tostring(L, -1));
  3618→                    fprintf(stderr, "ERROR: %s\n", error_message);
  3619→                    lua_pop(L, 2);  // error + traceback
  3620→                    error_state = true;
  3621→                } else {
  3622→                    lua_pop(L, 1);  // traceback
  3623→                }
  3624→            } else {
  3625→                lua_pop(L, 2);  // nil + traceback
  3626→            }
  3627→        }
  3628→
  3629→        step++;
... [70 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    36→
    37→#define STB_VORBIS_HEADER_ONLY
    38→#include <stb_vorbis.c>
    39→
    40→#define MA_ENABLE_VORBIS
    41→#define MINIAUDIO_IMPLEMENTATION
    42→#include <miniaudio.h>
    43→
    44→#include <box2d.h>
    45→
    46→#define WINDOW_TITLE "Anchor"
    47→#define GAME_WIDTH 480
    48→#define GAME_HEIGHT 270

152→// Audio globals (declared early so Sound functions can use them)
   153→static ma_engine audio_engine;
   154→static bool audio_initialized = false;
   155→static float sound_master_volume = 1.0f;
   156→static float music_master_volume = 1.0f;
   157→static float audio_master_pitch = 1.0f;
   158→#ifdef __EMSCRIPTEN__
   159→static bool audio_needs_unlock = true;  // Web requires user interaction to start audio
   160→#endif
   161→
   162→// Texture
   163→typedef struct {
   164→    GLuint id;
   165→    int width;
   166→    int height;

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   154→static bool audio_initialized = false;
   155→static float sound_master_volume = 1.0f;
   156→static float music_master_volume = 1.0f;
   157→static float audio_master_pitch = 1.0f;
   158→#ifdef __EMSCRIPTEN__
   159→static bool audio_needs_unlock = true;  // Web requires user interaction to start audio
   160→#endif
   161→
   162→// Physics globals
   163→static b2WorldId physics_world = {0};
   164→static bool physics_initialized = false;
   165→static bool physics_enabled = true;
   166→static float pixels_per_meter = 64.0f;  // Default: 64 pixels = 1 meter
   167→
   168→// Texture
   169→typedef struct {
   170→    GLuint id;
   171→    int width;
   172→    int height;

No matches found

792:// Input state - Keyboard
793:static bool keys_current[SDL_NUM_SCANCODES] = {0};
794:static bool keys_previous[SDL_NUM_SCANCODES] = {0};
796:// Input state - Mouse
804:// Input state - Gamepad
812:// Input type detection - track last input device used
1095:    memcpy(keys_previous, keys_current, sizeof(keys_previous));
1371:            return keys_current[ctrl->code];
1402:            return keys_current[ctrl->code] && !keys_previous[ctrl->code];
1425:            return !keys_current[ctrl->code] && keys_previous[ctrl->code];
2710:// Input Lua bindings
2717:        lua_pushboolean(L, keys_current[scancode]);
2728:        lua_pushboolean(L, keys_current[scancode] && !keys_previous[scancode]);
2739:        lua_pushboolean(L, !keys_current[scancode] && keys_previous[scancode]);
3499:                keys_current[sc] = true;
3526:                keys_current[sc] = false;

No matches found

2531:static int l_sound_load(lua_State* L) {
2583:static int l_audio_set_master_pitch(lua_State* L) {
3039:    lua_register(L, "sound_load", l_sound_load);
3046:    lua_register(L, "audio_set_master_pitch", l_audio_set_master_pitch);

2590→    Layer* layer = (Layer*)lua_touserdata(L, 1);
  2591→    Texture* tex = (Texture*)lua_touserdata(L, 2);
  2592→    float x = (float)luaL_checknumber(L, 3);
  2593→    float y = (float)luaL_checknumber(L, 4);
  2594→    uint32_t color = (uint32_t)luaL_optinteger(L, 5, 0xFFFFFFFF);  // Default white (no tint)
  2595→    uint32_t flash = (uint32_t)luaL_optinteger(L, 6, 0x00000000);  // Default black (no flash)
  2596→    layer_add_image(layer, tex, x, y, color, flash);
  2597→    return 0;
  2598→}
  2599→
  2600→static int l_layer_set_blend_mode(lua_State* L) {
  2601→    Layer* layer = (Layer*)lua_touserdata(L, 1);
  2602→    const char* mode = luaL_checkstring(L, 2);
  2603→    if (strcmp(mode, "alpha") == 0) {
  2604→        layer_set_blend_mode(layer, BLEND_ALPHA);
  2605→    } else if (strcmp(mode, "additive") == 0) {
  2606→        layer_set_blend_mode(layer, BLEND_ADDITIVE);
  2607→    } else {
  2608→        return luaL_error(L, "Invalid blend mode: %s (use 'alpha' or 'additive')", mode);
  2609→    }
  2610→    return 0;
  2611→}
  2612→
  2613→// Effect shader Lua bindings
  2614→static int l_shader_load_file(lua_State* L) {
  2615→    const char* path = luaL_checkstring(L, 1);
  2616→    GLuint shader = effect_shader_load_file(path);
  2617→    if (!shader) {
  2618→        return luaL_error(L, "Failed to load effect shader: %s", path);
  2619→    }
... [20 more lines]

2710:// Input Lua bindings
2711:static int l_key_is_down(lua_State* L) {
3065:    lua_register(L, "key_is_down", l_key_is_down);

2690→    Layer* layer = (Layer*)lua_touserdata(L, 1);
  2691→    float x = (lua_gettop(L) >= 2) ? (float)luaL_checknumber(L, 2) : 0.0f;
  2692→    float y = (lua_gettop(L) >= 3) ? (float)luaL_checknumber(L, 3) : 0.0f;
  2693→    layer_queue_draw(layer, x, y);
  2694→    return 0;
  2695→}
  2696→
  2697→static int l_layer_get_texture(lua_State* L) {
  2698→    Layer* layer = (Layer*)lua_touserdata(L, 1);
  2699→    GLuint tex = layer_get_texture(layer);
  2700→    lua_pushinteger(L, (lua_Integer)tex);
  2701→    return 1;
  2702→}
  2703→
  2704→static int l_layer_reset_effects(lua_State* L) {
  2705→    Layer* layer = (Layer*)lua_touserdata(L, 1);
  2706→    layer_reset_effects(layer);
  2707→    return 0;
  2708→}
  2709→
  2710→// Input Lua bindings
  2711→static int l_key_is_down(lua_State* L) {
  2712→    const char* key_name = luaL_checkstring(L, 1);
  2713→    SDL_Scancode scancode = key_name_to_scancode(key_name);
  2714→    if (scancode == SDL_SCANCODE_UNKNOWN) {
  2715→        lua_pushboolean(L, 0);
  2716→    } else {
  2717→        lua_pushboolean(L, keys_current[scancode]);
  2718→    }
  2719→    return 1;

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  2700→    lua_pushinteger(L, (lua_Integer)tex);
  2701→    return 1;
  2702→}
  2703→
  2704→static int l_layer_reset_effects(lua_State* L) {
  2705→    Layer* layer = (Layer*)lua_touserdata(L, 1);
  2706→    layer_reset_effects(layer);
  2707→    return 0;
  2708→}
  2709→
  2710→// Physics Lua bindings
  2711→static int l_physics_init(lua_State* L) {
  2712→    if (physics_initialized) {
  2713→        return 0;  // Already initialized
  2714→    }
  2715→
  2716→    b2WorldDef world_def = b2DefaultWorldDef();
  2717→    world_def.gravity = (b2Vec2){0.0f, 10.0f};  // Default gravity (10 m/s² down)
  2718→
  2719→    physics_world = b2CreateWorld(&world_def);
  2720→    physics_initialized = true;
  2721→    printf("Physics initialized (Box2D)\n");
  2722→    return 0;
  2723→}
  2724→
  2725→static int l_physics_set_gravity(lua_State* L) {
  2726→    if (!physics_initialized) {
  2727→        return luaL_error(L, "Physics not initialized. Call physics_init() first.");
  2728→    }
... [29 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

3089:    lua_register(L, "audio_set_master_pitch", l_audio_set_master_pitch);

3082→    lua_register(L, "sound_load", l_sound_load);
  3083→    lua_register(L, "sound_play", l_sound_play);
  3084→    lua_register(L, "sound_set_volume", l_sound_set_volume);
  3085→    lua_register(L, "music_load", l_music_load);
  3086→    lua_register(L, "music_play", l_music_play);
  3087→    lua_register(L, "music_stop", l_music_stop);
  3088→    lua_register(L, "music_set_volume", l_music_set_volume);
  3089→    lua_register(L, "audio_set_master_pitch", l_audio_set_master_pitch);
  3090→    lua_register(L, "rgba", l_rgba);
  3091→    lua_register(L, "set_shape_filter", l_set_shape_filter);
  3092→    lua_register(L, "timing_resync", l_timing_resync);
  3093→    // Effect shaders
  3094→    lua_register(L, "shader_load_file", l_shader_load_file);
  3095→    lua_register(L, "shader_load_string", l_shader_load_string);
  3096→    lua_register(L, "shader_destroy", l_shader_destroy);
  3097→    // Layer shader uniforms (deferred)
  3098→    lua_register(L, "layer_shader_set_float", l_layer_shader_set_float);
  3099→    lua_register(L, "layer_shader_set_vec2", l_layer_shader_set_vec2);
  3100→    lua_register(L, "layer_shader_set_vec4", l_layer_shader_set_vec4);
  3101→    lua_register(L, "layer_shader_set_int", l_layer_shader_set_int);
  3102→    // Layer effects
  3103→    lua_register(L, "layer_apply_shader", l_layer_apply_shader);
  3104→    lua_register(L, "layer_draw", l_layer_draw);
  3105→    lua_register(L, "layer_get_texture", l_layer_get_texture);
  3106→    lua_register(L, "layer_reset_effects", l_layer_reset_effects);
  3107→    // Input - Keyboard
  3108→    lua_register(L, "key_is_down", l_key_is_down);
  3109→    lua_register(L, "key_is_pressed", l_key_is_pressed);
  3110→    lua_register(L, "key_is_released", l_key_is_released);
  3111→    // Input - Mouse
... [10 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3098→    lua_register(L, "layer_shader_set_float", l_layer_shader_set_float);
  3099→    lua_register(L, "layer_shader_set_vec2", l_layer_shader_set_vec2);
  3100→    lua_register(L, "layer_shader_set_vec4", l_layer_shader_set_vec4);
  3101→    lua_register(L, "layer_shader_set_int", l_layer_shader_set_int);
  3102→    // Layer effects
  3103→    lua_register(L, "layer_apply_shader", l_layer_apply_shader);
  3104→    lua_register(L, "layer_draw", l_layer_draw);
  3105→    lua_register(L, "layer_get_texture", l_layer_get_texture);
  3106→    lua_register(L, "layer_reset_effects", l_layer_reset_effects);
  3107→    // Physics
  3108→    lua_register(L, "physics_init", l_physics_init);
  3109→    lua_register(L, "physics_set_gravity", l_physics_set_gravity);
  3110→    lua_register(L, "physics_set_meter_scale", l_physics_set_meter_scale);
  3111→    lua_register(L, "physics_set_enabled", l_physics_set_enabled);
  3112→    // Input - Keyboard
  3113→    lua_register(L, "key_is_down", l_key_is_down);
  3114→    lua_register(L, "key_is_pressed", l_key_is_pressed);
  3115→    lua_register(L, "key_is_released", l_key_is_released);
  3116→    // Input - Mouse

3665:        // Call Lua update (skip if in error state)

3656→        // Update sequences (clear just_fired from last frame, check timeouts)
  3657→        sequences_update((float)game_time);
  3658→
  3659→        // Check which actions were pressed and notify sequences
  3660→        sequences_check_actions((float)game_time);
  3661→
  3662→        // Update holds (track how long actions have been held)
  3663→        holds_update((float)PHYSICS_RATE);
  3664→
  3665→        // Call Lua update (skip if in error state)
  3666→        if (!error_state) {
  3667→            lua_pushcfunction(L, traceback);
  3668→            int err_handler = lua_gettop(L);
  3669→            lua_getglobal(L, "update");
  3670→            if (lua_isfunction(L, -1)) {
  3671→                lua_pushnumber(L, PHYSICS_RATE);
  3672→                if (lua_pcall(L, 1, 0, err_handler) != LUA_OK) {
  3673→                    snprintf(error_message, sizeof(error_message), "%s", lua_tostring(L, -1));
  3674→                    fprintf(stderr, "ERROR: %s\n", error_message);
  3675→                    lua_pop(L, 2);  // error + traceback
  3676→                    error_state = true;
  3677→                } else {
  3678→                    lua_pop(L, 1);  // traceback
  3679→                }
  3680→            } else {
  3681→                lua_pop(L, 2);  // nil + traceback
  3682→            }
  3683→        }
  3684→
  3685→        step++;

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3658→
  3659→        // Check which actions were pressed and notify sequences
  3660→        sequences_check_actions((float)game_time);
  3661→
  3662→        // Update holds (track how long actions have been held)
  3663→        holds_update((float)PHYSICS_RATE);
  3664→
  3665→        // Step physics world
  3666→        if (physics_initialized && physics_enabled) {
  3667→            b2World_Step(physics_world, (float)PHYSICS_RATE, 4);  // 4 sub-steps recommended
  3668→        }
  3669→
  3670→        // Call Lua update (skip if in error state)
  3671→        if (!error_state) {
  3672→            lua_pushcfunction(L, traceback);
  3673→            int err_handler = lua_gettop(L);
  3674→            lua_getglobal(L, "update");

231:    if (audio_initialized) {
422:    if (audio_needs_unlock && audio_initialized) {
3481:    if (audio_initialized) {

3474→    }
  3475→    layer_count = 0;
  3476→    // Screen blit resources
  3477→    if (screen_vbo) { glDeleteBuffers(1, &screen_vbo); screen_vbo = 0; }
  3478→    if (screen_vao) { glDeleteVertexArrays(1, &screen_vao); screen_vao = 0; }
  3479→    if (screen_shader) { glDeleteProgram(screen_shader); screen_shader = 0; }
  3480→    // Audio
  3481→    if (audio_initialized) {
  3482→        sound_cleanup_all();
  3483→        ma_engine_uninit(&audio_engine);
  3484→        audio_initialized = false;
  3485→    }
  3486→    // Other resources
  3487→    if (L) { lua_close(L); L = NULL; }
  3488→    if (gl_context) { SDL_GL_DeleteContext(gl_context); gl_context = NULL; }
  3489→    if (window) { SDL_DestroyWindow(window); window = NULL; }
  3490→    SDL_Quit();
  3491→}
  3492→
  3493→// One frame of the main loop
  3494→static void main_loop_iteration(void) {
  3495→    Uint64 current_time = SDL_GetPerformanceCounter();
  3496→    double dt = (double)(current_time - last_time) / (double)perf_freq;
  3497→    last_time = current_time;
  3498→

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3476→    // Screen blit resources
  3477→    if (screen_vbo) { glDeleteBuffers(1, &screen_vbo); screen_vbo = 0; }
  3478→    if (screen_vao) { glDeleteVertexArrays(1, &screen_vao); screen_vao = 0; }
  3479→    if (screen_shader) { glDeleteProgram(screen_shader); screen_shader = 0; }
  3480→    // Audio
  3481→    if (audio_initialized) {
  3482→        sound_cleanup_all();
  3483→        ma_engine_uninit(&audio_engine);
  3484→        audio_initialized = false;
  3485→    }
  3486→    // Physics
  3487→    if (physics_initialized) {
  3488→        b2DestroyWorld(physics_world);
  3489→        physics_initialized = false;
  3490→    }
  3491→    // Other resources
  3492→    if (L) { lua_close(L); L = NULL; }
  3493→    if (gl_context) { SDL_GL_DeleteContext(gl_context); gl_context = NULL; }
  3494→    if (window) { SDL_DestroyWindow(window); window = NULL; }
  3495→    SDL_Quit();

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

anchor.c
src/anchor.c(226): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(882): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(876): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1268): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1546): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1552): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1662): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1671): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1765): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1767): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2412): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→print("main.lua loaded - Physics Test (Phase 7 - Step 2)")
     2→
     3→set_shape_filter("rough")
     4→
     5→local screen_w, screen_h = 480, 270
     6→local game_layer = layer_create('game')
     7→local bg_color = rgba(30, 30, 35, 255)
     8→local white = rgba(255, 255, 255, 255)
     9→local green = rgba(100, 255, 100, 255)
    10→
    11→-- Initialize physics
    12→physics_init()
    13→physics_set_gravity(0, 500)  -- 500 pixels/sec² downward
    14→physics_set_meter_scale(64)  -- 64 pixels = 1 meter
    15→print("Physics world created!")
    16→
    17→-- Simple test: draw a circle that would fall if we had bodies
    18→-- (We'll add body creation in Step 5)
    19→local ball_x = screen_w / 2
    20→local ball_y = 50
    21→
    22→function update(dt)
    23→    -- For now, just verify the world is stepping without crashing
    24→    -- Toggle physics with space
    25→    if key_is_pressed('space') then
    26→        physics_set_enabled(false)
    27→        print("Physics paused")
    28→    end
    29→    if key_is_pressed('r') then
... [12 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

160→#endif
   161→
   162→// Physics globals
   163→static b2WorldId physics_world = {0};
   164→static bool physics_initialized = false;
   165→static bool physics_enabled = true;
   166→static float pixels_per_meter = 64.0f;  // Default: 64 pixels = 1 meter
   167→
   168→// Texture
   169→typedef struct {
   170→    GLuint id;
   171→    int width;
   172→    int height;
   173→} Texture;
   174→
   175→// Load a texture from file using stb_image
   176→static Texture* texture_load(const char* path) {
   177→    int width, height, channels;
   178→    stbi_set_flip_vertically_on_load(0);  // Don't flip - we handle Y in our coordinate system
   179→    unsigned char* data = stbi_load(path, &width, &height, &channels, 4);  // Force RGBA

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   158→#ifdef __EMSCRIPTEN__
   159→static bool audio_needs_unlock = true;  // Web requires user interaction to start audio
   160→#endif
   161→
   162→// Physics globals
   163→static b2WorldId physics_world = {0};
   164→static bool physics_initialized = false;
   165→static bool physics_enabled = true;
   166→static float pixels_per_meter = 64.0f;  // Default: 64 pixels = 1 meter
   167→
   168→// Physics tag system
   169→#define MAX_PHYSICS_TAGS 64
   170→#define MAX_TAG_NAME 32
   171→
   172→typedef struct {
   173→    char name[MAX_TAG_NAME];
   174→    uint64_t category_bit;    // Single bit identifying this tag (1, 2, 4, 8, ...)
   175→    uint64_t collision_mask;  // Which tags this collides with (physical response)
   176→    uint64_t sensor_mask;     // Which tags trigger sensor events
   177→    uint64_t hit_mask;        // Which tags trigger hit events
   178→} PhysicsTag;
   179→
   180→static PhysicsTag physics_tags[MAX_PHYSICS_TAGS];
   181→static int physics_tag_count = 0;
   182→
   183→// Find tag index by name, returns -1 if not found
   184→static int physics_tag_find(const char* name) {
   185→    for (int i = 0; i < physics_tag_count; i++) {
   186→        if (strcmp(physics_tags[i].name, name) == 0) {
... [24 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

2786:static int l_physics_set_enabled(lua_State* L) {
3149:    lua_register(L, "physics_set_enabled", l_physics_set_enabled);

2783→    return 0;
  2784→}
  2785→
  2786→static int l_physics_set_enabled(lua_State* L) {
  2787→    physics_enabled = lua_toboolean(L, 1);
  2788→    return 0;
  2789→}
  2790→
  2791→// Input Lua bindings
  2792→static int l_key_is_down(lua_State* L) {
  2793→    const char* key_name = luaL_checkstring(L, 1);
  2794→    SDL_Scancode scancode = key_name_to_scancode(key_name);
  2795→    if (scancode == SDL_SCANCODE_UNKNOWN) {
  2796→        lua_pushboolean(L, 0);
  2797→    } else {
  2798→        lua_pushboolean(L, keys_current[scancode]);
  2799→    }
  2800→    return 1;
  2801→}
  2802→

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  2782→    pixels_per_meter = scale;
  2783→    return 0;
  2784→}
  2785→
  2786→static int l_physics_set_enabled(lua_State* L) {
  2787→    physics_enabled = lua_toboolean(L, 1);
  2788→    return 0;
  2789→}
  2790→
  2791→static int l_physics_register_tag(lua_State* L) {
  2792→    const char* name = luaL_checkstring(L, 1);
  2793→
  2794→    // Check if already registered
  2795→    if (physics_tag_find(name) >= 0) {
  2796→        return 0;  // Already exists, silently succeed
  2797→    }
  2798→
  2799→    // Check capacity
  2800→    if (physics_tag_count >= MAX_PHYSICS_TAGS) {
  2801→        return luaL_error(L, "Maximum number of physics tags (%d) reached", MAX_PHYSICS_TAGS);
  2802→    }
  2803→
  2804→    // Register new tag
  2805→    PhysicsTag* tag = &physics_tags[physics_tag_count];
  2806→    strncpy(tag->name, name, MAX_TAG_NAME - 1);
  2807→    tag->name[MAX_TAG_NAME - 1] = '\0';
  2808→    tag->category_bit = (uint64_t)1 << physics_tag_count;  // Assign next bit
  2809→    tag->collision_mask = 0;  // No collisions by default
  2810→    tag->sensor_mask = 0;     // No sensor events by default
... [11 more lines]

3175:    lua_register(L, "physics_set_enabled", l_physics_set_enabled);

3168→    lua_register(L, "layer_draw", l_layer_draw);
  3169→    lua_register(L, "layer_get_texture", l_layer_get_texture);
  3170→    lua_register(L, "layer_reset_effects", l_layer_reset_effects);
  3171→    // Physics
  3172→    lua_register(L, "physics_init", l_physics_init);
  3173→    lua_register(L, "physics_set_gravity", l_physics_set_gravity);
  3174→    lua_register(L, "physics_set_meter_scale", l_physics_set_meter_scale);
  3175→    lua_register(L, "physics_set_enabled", l_physics_set_enabled);
  3176→    // Input - Keyboard
  3177→    lua_register(L, "key_is_down", l_key_is_down);
  3178→    lua_register(L, "key_is_pressed", l_key_is_pressed);
  3179→    lua_register(L, "key_is_released", l_key_is_released);
  3180→    // Input - Mouse
  3181→    lua_register(L, "mouse_position", l_mouse_position);
  3182→    lua_register(L, "mouse_delta", l_mouse_delta);

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3167→    lua_register(L, "layer_apply_shader", l_layer_apply_shader);
  3168→    lua_register(L, "layer_draw", l_layer_draw);
  3169→    lua_register(L, "layer_get_texture", l_layer_get_texture);
  3170→    lua_register(L, "layer_reset_effects", l_layer_reset_effects);
  3171→    // Physics
  3172→    lua_register(L, "physics_init", l_physics_init);
  3173→    lua_register(L, "physics_set_gravity", l_physics_set_gravity);
  3174→    lua_register(L, "physics_set_meter_scale", l_physics_set_meter_scale);
  3175→    lua_register(L, "physics_set_enabled", l_physics_set_enabled);
  3176→    lua_register(L, "physics_register_tag", l_physics_register_tag);
  3177→    // Input - Keyboard
  3178→    lua_register(L, "key_is_down", l_key_is_down);
  3179→    lua_register(L, "key_is_pressed", l_key_is_pressed);
  3180→    lua_register(L, "key_is_released", l_key_is_released);
  3181→    // Input - Mouse

anchor.c
src/anchor.c(264): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(920): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(914): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1306): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1584): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1590): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1700): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1709): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1803): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1805): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2450): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(2806): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→print("main.lua loaded - Physics Test (Phase 7 - Step 3: Tag System)")
     2→
     3→set_shape_filter("rough")
     4→
     5→local screen_w, screen_h = 480, 270
     6→local game_layer = layer_create('game')
     7→local bg_color = rgba(30, 30, 35, 255)
     8→local white = rgba(255, 255, 255, 255)
     9→local green = rgba(100, 255, 100, 255)
    10→
    11→-- Initialize physics
    12→physics_init()
    13→physics_set_gravity(0, 500)
    14→physics_set_meter_scale(64)
    15→
    16→-- Register collision tags
    17→physics_register_tag('player')
    18→physics_register_tag('enemy')
    19→physics_register_tag('wall')
    20→physics_register_tag('bullet')
    21→physics_register_tag('pickup')
    22→physics_register_tag('trigger')
    23→print("Registered 6 physics tags")
    24→
    25→-- Test duplicate registration (should silently succeed)
    26→physics_register_tag('player')
    27→print("Duplicate tag registration handled")
    28→
    29→function update(dt)
... [8 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

2808→    tag->category_bit = (uint64_t)1 << physics_tag_count;  // Assign next bit
  2809→    tag->collision_mask = 0;  // No collisions by default
  2810→    tag->sensor_mask = 0;     // No sensor events by default
  2811→    tag->hit_mask = 0;        // No hit events by default
  2812→
  2813→    physics_tag_count++;
  2814→    return 0;
  2815→}
  2816→
  2817→// Input Lua bindings
  2818→static int l_key_is_down(lua_State* L) {
  2819→    const char* key_name = luaL_checkstring(L, 1);
  2820→    SDL_Scancode scancode = key_name_to_scancode(key_name);
  2821→    if (scancode == SDL_SCANCODE_UNKNOWN) {
  2822→        lua_pushboolean(L, 0);

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  2809→    tag->collision_mask = 0;  // No collisions by default
  2810→    tag->sensor_mask = 0;     // No sensor events by default
  2811→    tag->hit_mask = 0;        // No hit events by default
  2812→
  2813→    physics_tag_count++;
  2814→    return 0;
  2815→}
  2816→
  2817→static int l_physics_enable_collision(lua_State* L) {
  2818→    const char* name_a = luaL_checkstring(L, 1);
  2819→    const char* name_b = luaL_checkstring(L, 2);
  2820→
  2821→    PhysicsTag* tag_a = physics_tag_get_by_name(name_a);
  2822→    PhysicsTag* tag_b = physics_tag_get_by_name(name_b);
  2823→
  2824→    if (!tag_a) return luaL_error(L, "Unknown physics tag: %s", name_a);
  2825→    if (!tag_b) return luaL_error(L, "Unknown physics tag: %s", name_b);
  2826→
  2827→    // Enable collision both ways
  2828→    tag_a->collision_mask |= tag_b->category_bit;
  2829→    tag_b->collision_mask |= tag_a->category_bit;
  2830→    return 0;
  2831→}
  2832→
  2833→static int l_physics_disable_collision(lua_State* L) {
  2834→    const char* name_a = luaL_checkstring(L, 1);
  2835→    const char* name_b = luaL_checkstring(L, 2);
  2836→
  2837→    PhysicsTag* tag_a = physics_tag_get_by_name(name_a);
... [66 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3253→    // Physics
  3254→    lua_register(L, "physics_init", l_physics_init);
  3255→    lua_register(L, "physics_set_gravity", l_physics_set_gravity);
  3256→    lua_register(L, "physics_set_meter_scale", l_physics_set_meter_scale);
  3257→    lua_register(L, "physics_set_enabled", l_physics_set_enabled);
  3258→    lua_register(L, "physics_register_tag", l_physics_register_tag);
  3259→    lua_register(L, "physics_enable_collision", l_physics_enable_collision);
  3260→    lua_register(L, "physics_disable_collision", l_physics_disable_collision);
  3261→    lua_register(L, "physics_enable_sensor", l_physics_enable_sensor);
  3262→    lua_register(L, "physics_enable_hit", l_physics_enable_hit);
  3263→    lua_register(L, "physics_tags_collide", l_physics_tags_collide);
  3264→    // Input - Keyboard
  3265→    lua_register(L, "key_is_down", l_key_is_down);
  3266→    lua_register(L, "key_is_pressed", l_key_is_pressed);
  3267→    lua_register(L, "key_is_released", l_key_is_released);
  3268→    // Input - Mouse

anchor.c
src/anchor.c(264): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(920): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(914): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1306): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1584): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1590): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1700): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1709): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1803): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1805): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2450): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(2806): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→print("main.lua loaded - Physics Test (Phase 7 - Step 4: Collision Config)")
     2→
     3→set_shape_filter("rough")
     4→
     5→local screen_w, screen_h = 480, 270
     6→local game_layer = layer_create('game')
     7→local bg_color = rgba(30, 30, 35, 255)
     8→local white = rgba(255, 255, 255, 255)
     9→local green = rgba(100, 255, 100, 255)
    10→local red = rgba(255, 100, 100, 255)
    11→
    12→-- Initialize physics
    13→physics_init()
    14→physics_set_gravity(0, 500)
    15→physics_set_meter_scale(64)
    16→
    17→-- Register collision tags
    18→physics_register_tag('player')
    19→physics_register_tag('enemy')
    20→physics_register_tag('wall')
    21→physics_register_tag('bullet')
    22→physics_register_tag('pickup')
    23→
    24→-- Configure collisions
    25→physics_enable_collision('player', 'wall')
    26→physics_enable_collision('player', 'enemy')
    27→physics_enable_collision('enemy', 'wall')
    28→physics_enable_collision('bullet', 'wall')
    29→physics_enable_collision('bullet', 'enemy')
... [27 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

2890→        return 1;
  2891→    }
  2892→
  2893→    // Check if either tag's collision mask includes the other
  2894→    bool collides = (tag_a->collision_mask & tag_b->category_bit) != 0;
  2895→    lua_pushboolean(L, collides);
  2896→    return 1;
  2897→}
  2898→
  2899→// Input Lua bindings
  2900→static int l_key_is_down(lua_State* L) {
  2901→    const char* key_name = luaL_checkstring(L, 1);
  2902→    SDL_Scancode scancode = key_name_to_scancode(key_name);
  2903→    if (scancode == SDL_SCANCODE_UNKNOWN) {
  2904→        lua_pushboolean(L, 0);

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  2889→        lua_pushboolean(L, 0);
  2890→        return 1;
  2891→    }
  2892→
  2893→    // Check if either tag's collision mask includes the other
  2894→    bool collides = (tag_a->collision_mask & tag_b->category_bit) != 0;
  2895→    lua_pushboolean(L, collides);
  2896→    return 1;
  2897→}
  2898→
  2899→static int l_physics_create_body(lua_State* L) {
  2900→    if (!physics_initialized) {
  2901→        return luaL_error(L, "Physics not initialized. Call physics_init() first.");
  2902→    }
  2903→
  2904→    const char* type_str = luaL_checkstring(L, 1);
  2905→    float x = (float)luaL_checknumber(L, 2);
  2906→    float y = (float)luaL_checknumber(L, 3);
  2907→
  2908→    // Determine body type
  2909→    b2BodyType body_type;
  2910→    if (strcmp(type_str, "static") == 0) {
  2911→        body_type = b2_staticBody;
  2912→    } else if (strcmp(type_str, "dynamic") == 0) {
  2913→        body_type = b2_dynamicBody;
  2914→    } else if (strcmp(type_str, "kinematic") == 0) {
  2915→        body_type = b2_kinematicBody;
  2916→    } else {
  2917→        return luaL_error(L, "Invalid body type: %s (use 'static', 'dynamic', or 'kinematic')", type_str);
... [34 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  2931→
  2932→    return 1;
  2933→}
  2934→
  2935→static int l_physics_destroy_body(lua_State* L) {
  2936→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  2937→    if (!body_id) {
  2938→        return luaL_error(L, "Invalid body");
  2939→    }
  2940→
  2941→    if (b2Body_IsValid(*body_id)) {
  2942→        b2DestroyBody(*body_id);
  2943→    }
  2944→    return 0;
  2945→}
  2946→
  2947→static int l_physics_get_position(lua_State* L) {
  2948→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  2949→    if (!body_id || !b2Body_IsValid(*body_id)) {
  2950→        return luaL_error(L, "Invalid body");
  2951→    }
  2952→
  2953→    b2Vec2 pos = b2Body_GetPosition(*body_id);
  2954→    lua_pushnumber(L, pos.x * pixels_per_meter);
  2955→    lua_pushnumber(L, pos.y * pixels_per_meter);
  2956→    return 2;
  2957→}
  2958→
  2959→// Input Lua bindings
... [4 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3318→    lua_register(L, "physics_register_tag", l_physics_register_tag);
  3319→    lua_register(L, "physics_enable_collision", l_physics_enable_collision);
  3320→    lua_register(L, "physics_disable_collision", l_physics_disable_collision);
  3321→    lua_register(L, "physics_enable_sensor", l_physics_enable_sensor);
  3322→    lua_register(L, "physics_enable_hit", l_physics_enable_hit);
  3323→    lua_register(L, "physics_tags_collide", l_physics_tags_collide);
  3324→    lua_register(L, "physics_create_body", l_physics_create_body);
  3325→    lua_register(L, "physics_destroy_body", l_physics_destroy_body);
  3326→    lua_register(L, "physics_get_position", l_physics_get_position);
  3327→    // Input - Keyboard
  3328→    lua_register(L, "key_is_down", l_key_is_down);
  3329→    lua_register(L, "key_is_pressed", l_key_is_pressed);
  3330→    lua_register(L, "key_is_released", l_key_is_released);
  3331→    // Input - Mouse

anchor.c
src/anchor.c(264): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(920): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(914): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1306): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1584): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1590): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1700): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1709): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1803): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1805): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2450): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(2806): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→print("main.lua loaded - Physics Test (Phase 7 - Step 5: Body Creation)")
     2→
     3→set_shape_filter("rough")
     4→
     5→local screen_w, screen_h = 480, 270
     6→local game_layer = layer_create('game')
     7→local bg_color = rgba(30, 30, 35, 255)
     8→local white = rgba(255, 255, 255, 255)
     9→local green = rgba(100, 255, 100, 255)
    10→local yellow = rgba(255, 255, 100, 255)
    11→
    12→-- Initialize physics
    13→physics_init()
    14→physics_set_gravity(0, 500)
    15→physics_set_meter_scale(64)
    16→
    17→-- Create bodies (no shapes yet - they won't fall without mass)
    18→local static_body = physics_create_body('static', screen_w/2, screen_h - 30)
    19→local dynamic_body = physics_create_body('dynamic', screen_w/2, 50)
    20→print("Created static and dynamic bodies")
    21→
    22→-- Get initial positions
    23→local sx, sy = physics_get_position(static_body)
    24→local dx, dy = physics_get_position(dynamic_body)
    25→print(string.format("Static body at: %.1f, %.1f", sx, sy))
    26→print(string.format("Dynamic body at: %.1f, %.1f", dx, dy))
    27→
    28→function update(dt)
    29→    -- Get current positions
... [14 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  2943→    }
  2944→    return 0;
  2945→}
  2946→
  2947→static int l_physics_get_position(lua_State* L) {
  2948→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  2949→    if (!body_id || !b2Body_IsValid(*body_id)) {
  2950→        return luaL_error(L, "Invalid body");
  2951→    }
  2952→
  2953→    b2Vec2 pos = b2Body_GetPosition(*body_id);
  2954→    lua_pushnumber(L, pos.x * pixels_per_meter);
  2955→    lua_pushnumber(L, pos.y * pixels_per_meter);
  2956→    return 2;
  2957→}
  2958→
  2959→static int l_physics_get_body_count(lua_State* L) {
  2960→    if (!physics_initialized) {
  2961→        lua_pushinteger(L, 0);
  2962→        return 1;
  2963→    }
  2964→
  2965→    b2Counters counters = b2World_GetCounters(physics_world);
  2966→    lua_pushinteger(L, counters.bodyCount);
  2967→    return 1;
  2968→}
  2969→
  2970→static int l_physics_body_is_valid(lua_State* L) {
  2971→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
... [13 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3341→    lua_register(L, "physics_disable_collision", l_physics_disable_collision);
  3342→    lua_register(L, "physics_enable_sensor", l_physics_enable_sensor);
  3343→    lua_register(L, "physics_enable_hit", l_physics_enable_hit);
  3344→    lua_register(L, "physics_tags_collide", l_physics_tags_collide);
  3345→    lua_register(L, "physics_create_body", l_physics_create_body);
  3346→    lua_register(L, "physics_destroy_body", l_physics_destroy_body);
  3347→    lua_register(L, "physics_get_position", l_physics_get_position);
  3348→    lua_register(L, "physics_get_body_count", l_physics_get_body_count);
  3349→    lua_register(L, "physics_body_is_valid", l_physics_body_is_valid);
  3350→    // Input - Keyboard
  3351→    lua_register(L, "key_is_down", l_key_is_down);
  3352→    lua_register(L, "key_is_pressed", l_key_is_pressed);
  3353→    lua_register(L, "key_is_released", l_key_is_released);
  3354→    // Input - Mouse

anchor.c
src/anchor.c(264): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(920): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(914): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1306): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1584): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1590): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1700): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1709): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1803): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1805): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2450): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(2806): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→print("main.lua loaded - Physics Test (Phase 7 - Step 5: Body Creation)")
     2→
     3→set_shape_filter("rough")
     4→
     5→local screen_w, screen_h = 480, 270
     6→local game_layer = layer_create('game')
     7→local bg_color = rgba(30, 30, 35, 255)
     8→local white = rgba(255, 255, 255, 255)
     9→local green = rgba(100, 255, 100, 255)
    10→local yellow = rgba(255, 255, 100, 255)
    11→
    12→-- Initialize physics
    13→physics_init()
    14→physics_set_gravity(0, 500)
    15→physics_set_meter_scale(64)
    16→
    17→-- Create static ground body
    18→local static_body = physics_create_body('static', screen_w/2, screen_h - 30)
    19→print("Created static ground body")
    20→
    21→-- Table to track dynamic bodies
    22→local dynamic_bodies = {}
    23→
    24→function update(dt)
    25→    -- Create body on Space
    26→    if is_key_pressed('space') then
    27→        local x = math.random(50, screen_w - 50)
    28→        local y = 50
    29→        local body = physics_create_body('dynamic', x, y)
... [31 more lines]

E:\a327ex\Anchor\engine\src\anchor.c:3351:    lua_register(L, "key_is_down", l_key_is_down);
E:\a327ex\Anchor\engine\src\anchor.c:3352:    lua_register(L, "key_is_pressed", l_key_is_pressed);
E:\a327ex\Anchor\engine\src\anchor.c:3353:    lua_register(L, "key_is_released", l_key_is_released);

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    21→-- Table to track dynamic bodies
    22→local dynamic_bodies = {}
    23→
    24→function update(dt)
    25→    -- Create body on Space
    26→    if key_is_pressed('space') then
    27→        local x = math.random(50, screen_w - 50)
    28→        local y = 50
    29→        local body = physics_create_body('dynamic', x, y)
    30→        table.insert(dynamic_bodies, body)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    30→        table.insert(dynamic_bodies, body)
    31→        print(string.format("Created body at %.0f, %.0f - Total: %d", x, y, #dynamic_bodies))
    32→    end
    33→
    34→    -- Destroy oldest body on D
    35→    if key_is_pressed('d') and #dynamic_bodies > 0 then
    36→        local body = table.remove(dynamic_bodies, 1)
    37→        physics_destroy_body(body)
    38→        print(string.format("Destroyed body - Remaining: %d", #dynamic_bodies))
    39→    end

15:| Timestep | Fixed 120Hz physics, 60Hz render | Decoupled for pixel-perfect visuals with responsive input |
71:**Goal:** Window opens, clears to a color, processes input, runs Lua. Works on Windows and Web.
77:  - [x] SDL2 (window, input)
96:- [x] Decoupled timestep: 120Hz physics/input, 60Hz rendering
159:- [x] Keyboard event capture (prevent default for arrow keys, space)
160:- [x] Canvas focus for input on load
434:-- Get layer texture (for use as input to another shader)
463:**Goal:** Action-based input system with keyboard, mouse, and gamepad support. Includes advanced features: chords, sequences, holds, input type detection, and rebinding capture.
465:See `reference/input-system-research.md` for research on input systems across 17+ game engines.
471:**Action-based input:** Physical inputs (keys, buttons) map to named actions. Game code queries actions, not raw keys.
473:**Control string format:** `type:key` — e.g., `'key:space'`, `'mouse:1'`, `'button:a'`, `'axis:leftx+'`
475:**Unified query system:** Actions, chords, sequences, and holds all use the same `is_pressed`/`is_down`/`is_released` functions.
477:**Edge detection:** Standard previous/current frame comparison for pressed (just this frame) and released (just this frame).
483:**Step 1: Raw keyboard state**
484:- [x] Internal state arrays: `keys_current[NUM_KEYS]`, `keys_previous[NUM_KEYS]`
485:- [x] SDL event handling: `SDL_KEYDOWN`, `SDL_KEYUP` update `keys_current`
486:- [x] End of frame: copy `keys_current` to `keys_previous`
487:- [x] `key_is_down(key)` — returns `keys_current[scancode]`
488:- [x] `key_is_pressed(key)` — returns `current && !previous`
489:- [x] `key_is_released(key)` — returns `!current && previous`
498:- [x] `mouse_is_pressed/down/released(button)` — edge detection for buttons
503:- [x] Action struct: name, array of controls, pressed/down/released state
505:- [x] `input_bind(action, control_string)` — parse control string, add to action
506:- [x] `is_pressed(action)` — true if any bound control just pressed
509:- [x] Per-frame action state computation from raw input states
512:- [x] `input_unbind(action, control)` — remove specific control from action
513:- [x] `input_unbind_all(action)` — remove all controls from action
514:- [x] `input_bind_all()` — bind every key/button to action with same name
515:  - All keyboard keys → `'a'`, `'space'`, `'left'`, etc.
520:- [x] `input_get_axis(negative, positive)` — returns -1 to 1
... [100 more lines]

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→print("main.lua loaded - Physics Test (Phase 7 - Step 5: Body Creation)")
     2→
     3→set_shape_filter("rough")
     4→input_bind_all()
     5→
     6→local screen_w, screen_h = 480, 270
     7→local game_layer = layer_create('game')
     8→local bg_color = rgba(30, 30, 35, 255)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    22→-- Table to track dynamic bodies
    23→local dynamic_bodies = {}
    24→
    25→function update(dt)
    26→    -- Create body on Space
    27→    if is_pressed('space') then
    28→        local x = math.random(50, screen_w - 50)
    29→        local y = 50
    30→        local body = physics_create_body('dynamic', x, y)
    31→        table.insert(dynamic_bodies, body)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    31→        table.insert(dynamic_bodies, body)
    32→        print(string.format("Created body at %.0f, %.0f - Total: %d", x, y, #dynamic_bodies))
    33→    end
    34→
    35→    -- Destroy oldest body on D
    36→    if is_pressed('d') and #dynamic_bodies > 0 then
    37→        local body = table.remove(dynamic_bodies, 1)
    38→        physics_destroy_body(body)
    39→        print(string.format("Destroyed body - Remaining: %d", #dynamic_bodies))
    40→    end

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    53→            layer_circle(game_layer, x, y, 15, yellow)
    54→        end
    55→    end
    56→
    57→end
    58→

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    28→        local x = math.random(50, screen_w - 50)
    29→        local y = 50
    30→        local body = physics_create_body('dynamic', x, y)
    31→        table.insert(dynamic_bodies, body)
    32→        print(string.format("Created body at %.0f, %.0f - Lua: %d, Box2D: %d", x, y, #dynamic_bodies, physics_get_body_count()))
    33→    end
    34→
    35→    -- Destroy oldest body on D
    36→    if is_pressed('d') and #dynamic_bodies > 0 then

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    35→    -- Destroy oldest body on D
    36→    if is_pressed('d') and #dynamic_bodies > 0 then
    37→        local body = table.remove(dynamic_bodies, 1)
    38→        physics_destroy_body(body)
    39→        print(string.format("Destroyed body - Lua: %d, Box2D: %d", #dynamic_bodies, physics_get_body_count()))
    40→    end
    41→
    42→    -- Draw
    43→    layer_rectangle(game_layer, 0, 0, screen_w, screen_h, bg_color)

1050→  - `physics_set_angle(body, angle)`
  1051→  - `physics_set_transform(body, x, y, angle)`
  1052→- [ ] Velocity:
  1053→  - `physics_get_velocity(body)` → vx, vy (pixels/sec)
  1054→  - `physics_get_angular_velocity(body)` → rad/sec
  1055→  - `physics_set_velocity(body, vx, vy)`
  1056→  - `physics_set_angular_velocity(body, av)`
  1057→- [ ] Forces/impulses (all in pixel units, convert internally):
  1058→  - `physics_apply_force(body, fx, fy)`
  1059→  - `physics_apply_force_at(body, fx, fy, px, py)`
  1060→  - `physics_apply_impulse(body, ix, iy)`
  1061→  - `physics_apply_impulse_at(body, ix, iy, px, py)`
  1062→  - `physics_apply_torque(body, torque)`
  1063→  - `physics_apply_angular_impulse(body, impulse)`
  1064→- [ ] Properties:
  1065→  - `physics_set_linear_damping(body, damping)`
  1066→  - `physics_set_angular_damping(body, damping)`
  1067→  - `physics_set_gravity_scale(body, scale)`
  1068→  - `physics_set_fixed_rotation(body, bool)`
  1069→  - `physics_set_bullet(body, bool)` — enable CCD
  1070→- [ ] User data:
  1071→  - `physics_set_user_data(body, id)` — store integer ID
  1072→  - `physics_get_user_data(body)` → integer ID
  1073→
  1074→**Step 8: Event buffering**
  1075→- [ ] After `b2World_Step()`, retrieve events:
  1076→  - `b2World_GetContactEvents()` — collision begin/end, hit
  1077→  - `b2World_GetSensorEvents()` — sensor begin/end
  1078→- [ ] Buffer events in C arrays, keyed by tag pair for fast lookup
  1079→- [ ] Validate shape IDs with `b2Shape_IsValid()` before storing
... [50 more lines]

1010→- [ ] `physics_set_meter_scale(scale)` — configure pixels-per-meter (default 64)
  1011→- [ ] Integrate `b2World_Step()` into main loop (use existing 120Hz physics rate)
  1012→- [ ] `physics_set_enabled(bool)` — pause/resume simulation
  1013→- [ ] Cleanup on shutdown
  1014→
  1015→**Step 3: Tag system**
  1016→- [ ] Tag registry: string name → 64-bit category bit (max 64 tags)
  1017→- [ ] `physics_register_tag(name)` — assigns next available bit
  1018→- [ ] Store tag info: name, category bit, collision mask, sensor mask, hit mask
  1019→- [ ] Internal lookup functions: tag name → category bit, shape → tag name
  1020→
  1021→**Step 4: Collision configuration**
  1022→- [ ] `physics_enable_collision(tag_a, tag_b)` — sets mask bits for physical collision
  1023→- [ ] `physics_disable_collision(tag_a, tag_b)` — clears mask bits
  1024→- [ ] `physics_enable_sensor(tag_a, tag_b)` — marks pair for sensor events
  1025→- [ ] `physics_enable_hit(tag_a, tag_b)` — marks pair for hit events
  1026→- [ ] `physics_tags_collide(tag_a, tag_b)` — query if tags collide
  1027→- [ ] Apply correct `b2Filter` when creating shapes based on tag
  1028→
  1029→**Step 5: Body creation**
  1030→- [ ] `physics_create_body(type, x, y)` — create body, return `b2BodyId` as userdata
  1031→  - Types: `'static'`, `'dynamic'`, `'kinematic'`
  1032→  - Position in pixels, convert to meters
  1033→- [ ] `physics_destroy_body(body)` — destroy body and all attached shapes
  1034→- [ ] Lua userdata holds `b2BodyId` struct directly (pass-through, no mapping)
  1035→
  1036→**Step 6: Shape creation**
  1037→- [ ] `physics_add_circle(body, tag, radius, [opts])` — attach circle shape
  1038→- [ ] `physics_add_box(body, tag, width, height, [opts])` — attach box shape
  1039→- [ ] `physics_add_polygon(body, tag, vertices, [opts])` — attach convex polygon
... [20 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

E:\a327ex\Anchor\engine\include\box2d\broad_phase.c:187: // b2ShapeDef::invokeContactCreation or when a static shape is modified.
E:\a327ex\Anchor\engine\include\box2d\box2d.h:448:/// @see b2ShapeDef::enableContactEvents
E:\a327ex\Anchor\engine\include\box2d\box2d.h:453:/// @see b2ShapeDef::enableHitEvents
E:\a327ex\Anchor\engine\include\box2d\box2d.h:498:B2_API b2ShapeId b2CreateCircleShape( b2BodyId bodyId, const b2ShapeDef* def, const b2Circle* circle );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:503:B2_API b2ShapeId b2CreateSegmentShape( b2BodyId bodyId, const b2ShapeDef* def, const b2Segment* segment );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:508:B2_API b2ShapeId b2CreateCapsuleShape( b2BodyId bodyId, const b2ShapeDef* def, const b2Capsule* capsule );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:513:B2_API b2ShapeId b2CreatePolygonShape( b2BodyId bodyId, const b2ShapeDef* def, const b2Polygon* polygon );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:546:/// @see b2ShapeDef::density, b2Body_ApplyMassFromShapes
E:\a327ex\Anchor\engine\include\box2d\box2d.h:582:/// @see b2ShapeDef::filter
E:\a327ex\Anchor\engine\include\box2d\box2d.h:586:/// @see b2ShapeDef::enableSensorEvents
E:\a327ex\Anchor\engine\include\box2d\box2d.h:593:/// @see b2ShapeDef::enableContactEvents
E:\a327ex\Anchor\engine\include\box2d\shape.c:60:static b2Shape* b2CreateShapeInternal( b2World* world, b2Body* body, b2Transform transform, const b2ShapeDef* def,
E:\a327ex\Anchor\engine\include\box2d\shape.c:161:static b2ShapeId b2CreateShape( b2BodyId bodyId, const b2ShapeDef* def, const void* geometry, b2ShapeType shapeType )
E:\a327ex\Anchor\engine\include\box2d\shape.c:196:b2ShapeId b2CreateCircleShape( b2BodyId bodyId, const b2ShapeDef* def, const b2Circle* circle )
E:\a327ex\Anchor\engine\include\box2d\shape.c:201:b2ShapeId b2CreateCapsuleShape( b2BodyId bodyId, const b2ShapeDef* def, const b2Capsule* capsule )
E:\a327ex\Anchor\engine\include\box2d\shape.c:212:b2ShapeId b2CreatePolygonShape( b2BodyId bodyId, const b2ShapeDef* def, const b2Polygon* polygon )
E:\a327ex\Anchor\engine\include\box2d\shape.c:218:b2ShapeId b2CreateSegmentShape( b2BodyId bodyId, const b2ShapeDef* def, const b2Segment* segment )
E:\a327ex\Anchor\engine\include\box2d\shape.c:391:  b2ShapeDef shapeDef = b2DefaultShapeDef();
E:\a327ex\Anchor\engine\include\box2d\types.c:55:b2ShapeDef b2DefaultShapeDef( void )
E:\a327ex\Anchor\engine\include\box2d\types.c:57:   b2ShapeDef def = { 0 };
E:\a327ex\Anchor\engine\include\box2d\types.h:389:typedef struct b2ShapeDef
E:\a327ex\Anchor\engine\include\box2d\types.h:439:} b2ShapeDef;
E:\a327ex\Anchor\engine\include\box2d\types.h:443:B2_API b2ShapeDef b2DefaultShapeDef( void );
E:\a327ex\Anchor\engine\include\box2d\types.h:1136:/// @see b2ShapeDef

385→/// This is a temporary object used to bundle shape creation parameters. You may use
   386→/// the same shape definition to create multiple shapes.
   387→/// Must be initialized using b2DefaultShapeDef().
   388→/// @ingroup shape
   389→typedef struct b2ShapeDef
   390→{
   391→   /// Use this to store application specific shape data.
   392→   void* userData;
   393→
   394→   /// The surface material for this shape.
   395→   b2SurfaceMaterial material;
   396→
   397→   /// The density, usually in kg/m^2.
   398→   /// This is not part of the surface material because this is for the interior, which may have
   399→   /// other considerations, such as being hollow. For example a wood barrel may be hollow or full of water.
   400→   float density;
   401→
   402→   /// Collision filtering data.
   403→   b2Filter filter;
   404→
   405→   /// Enable custom filtering. Only one of the two shapes needs to enable custom filtering. See b2WorldDef.
   406→   bool enableCustomFiltering;
   407→
   408→   /// A sensor shape generates overlap events but never generates a collision response.
   409→   /// Sensors do not have continuous collision. Instead, use a ray or shape cast for those scenarios.
   410→   /// Sensors still contribute to the body mass if they have non-zero density.
   411→   /// @note Sensor events are disabled by default.
   412→   /// @see enableSensorEvents
   413→   bool isSensor;
   414→
... [40 more lines]

E:\a327ex\Anchor\engine\include\box2d\collision.h:105:typedef struct b2Circle
E:\a327ex\Anchor\engine\include\box2d\collision.h-106-{
E:\a327ex\Anchor\engine\include\box2d\collision.h-107-  /// The local center
E:\a327ex\Anchor\engine\include\box2d\collision.h-108-  b2Vec2 center;
E:\a327ex\Anchor\engine\include\box2d\collision.h-109-
E:\a327ex\Anchor\engine\include\box2d\collision.h-110-  /// The radius
E:\a327ex\Anchor\engine\include\box2d\collision.h-111-  float radius;
E:\a327ex\Anchor\engine\include\box2d\collision.h-112-} b2Circle;
E:\a327ex\Anchor\engine\include\box2d\collision.h-113-
E:\a327ex\Anchor\engine\include\box2d\collision.h-114-/// A solid capsule can be viewed as two semicircles connected
E:\a327ex\Anchor\engine\include\box2d\collision.h-115-/// by a rectangle.
E:\a327ex\Anchor\engine\include\box2d\collision.h:116:typedef struct b2Capsule
E:\a327ex\Anchor\engine\include\box2d\collision.h-117-{
E:\a327ex\Anchor\engine\include\box2d\collision.h-118-  /// Local center of the first semicircle
E:\a327ex\Anchor\engine\include\box2d\collision.h-119-  b2Vec2 center1;
E:\a327ex\Anchor\engine\include\box2d\collision.h-120-
E:\a327ex\Anchor\engine\include\box2d\collision.h-121-  /// Local center of the second semicircle
E:\a327ex\Anchor\engine\include\box2d\collision.h-122-  b2Vec2 center2;
E:\a327ex\Anchor\engine\include\box2d\collision.h-123-
E:\a327ex\Anchor\engine\include\box2d\collision.h-124-  /// The radius of the semicircles
E:\a327ex\Anchor\engine\include\box2d\collision.h-125-  float radius;
E:\a327ex\Anchor\engine\include\box2d\collision.h-126-} b2Capsule;
--
E:\a327ex\Anchor\engine\include\box2d\collision.h:134:typedef struct b2Polygon
E:\a327ex\Anchor\engine\include\box2d\collision.h-135-{
E:\a327ex\Anchor\engine\include\box2d\collision.h-136-  /// The polygon vertices
E:\a327ex\Anchor\engine\include\box2d\collision.h-137-  b2Vec2 vertices[B2_MAX_POLYGON_VERTICES];
E:\a327ex\Anchor\engine\include\box2d\collision.h-138-
E:\a327ex\Anchor\engine\include\box2d\collision.h-139-  /// The outward normal vectors of the polygon sides
E:\a327ex\Anchor\engine\include\box2d\collision.h-140-  b2Vec2 normals[B2_MAX_POLYGON_VERTICES];
... [4 more lines]

E:\a327ex\Anchor\engine\include\box2d\collision.h:133:/// b2MakePolygon or b2MakeBox.
E:\a327ex\Anchor\engine\include\box2d\collision.h:185:B2_API b2Polygon b2MakePolygon( const b2Hull* hull, float radius );
E:\a327ex\Anchor\engine\include\box2d\collision.h:202:B2_API b2Polygon b2MakeBox( float halfWidth, float halfHeight );
E:\a327ex\Anchor\engine\include\box2d\collision.h:208:B2_API b2Polygon b2MakeRoundedBox( float halfWidth, float halfHeight, float radius );
E:\a327ex\Anchor\engine\include\box2d\geometry.c:56:b2Polygon b2MakePolygon( const b2Hull* hull, float radius )
E:\a327ex\Anchor\engine\include\box2d\geometry.c:135:   return b2MakeBox( halfWidth, halfWidth );
E:\a327ex\Anchor\engine\include\box2d\geometry.c:138:b2Polygon b2MakeBox( float halfWidth, float halfHeight )
E:\a327ex\Anchor\engine\include\box2d\geometry.c:158:b2Polygon b2MakeRoundedBox( float halfWidth, float halfHeight, float radius )
E:\a327ex\Anchor\engine\include\box2d\geometry.c:161:   b2Polygon shape = b2MakeBox( halfWidth, halfHeight );
E:\a327ex\Anchor\engine\include\box2d\weld_joint.c:472: b2Polygon box = b2MakeBox( 0.25f * drawScale, 0.125f * drawScale );

E:\a327ex\Anchor\engine\include\box2d\collision.h:189:B2_API b2Polygon b2MakeOffsetPolygon( const b2Hull* hull, b2Vec2 position, b2Rot rotation );
E:\a327ex\Anchor\engine\include\box2d\collision.h:193:B2_API b2Polygon b2MakeOffsetRoundedPolygon( const b2Hull* hull, b2Vec2 position, b2Rot rotation, float radius );
E:\a327ex\Anchor\engine\include\box2d\collision.h:215:B2_API b2Polygon b2MakeOffsetBox( float halfWidth, float halfHeight, b2Vec2 center, b2Rot rotation );
E:\a327ex\Anchor\engine\include\box2d\collision.h:223:B2_API b2Polygon b2MakeOffsetRoundedBox( float halfWidth, float halfHeight, b2Vec2 center, b2Rot rotation, float radius );
E:\a327ex\Anchor\engine\include\box2d\collision.h:436:B2_API b2ShapeProxy b2MakeOffsetProxy( const b2Vec2* points, int count, float radius, b2Vec2 position, b2Rot rotation );
E:\a327ex\Anchor\engine\include\box2d\distance.c:121:b2ShapeProxy b2MakeOffsetProxy( const b2Vec2* points, int count, float radius, b2Vec2 position, b2Rot rotation )
E:\a327ex\Anchor\engine\include\box2d\geometry.c:91:b2Polygon b2MakeOffsetPolygon( const b2Hull* hull, b2Vec2 position, b2Rot rotation )
E:\a327ex\Anchor\engine\include\box2d\geometry.c:93:    return b2MakeOffsetRoundedPolygon( hull, position, rotation, 0.0f );
E:\a327ex\Anchor\engine\include\box2d\geometry.c:96:b2Polygon b2MakeOffsetRoundedPolygon( const b2Hull* hull, b2Vec2 position, b2Rot rotation, float radius )
E:\a327ex\Anchor\engine\include\box2d\geometry.c:166:b2Polygon b2MakeOffsetBox( float halfWidth, float halfHeight, b2Vec2 center, b2Rot rotation )
E:\a327ex\Anchor\engine\include\box2d\geometry.c:185:b2Polygon b2MakeOffsetRoundedBox( float halfWidth, float halfHeight, b2Vec2 center, b2Rot rotation, float radius )

E:\a327ex\Anchor\engine\include\box2d\types.h:276:typedef struct b2Filter
E:\a327ex\Anchor\engine\include\box2d\types.h-277-{
E:\a327ex\Anchor\engine\include\box2d\types.h-278-  /// The collision category bits. Normally you would just set one bit. The category bits should
E:\a327ex\Anchor\engine\include\box2d\types.h-279-  /// represent your application object types. For example:
E:\a327ex\Anchor\engine\include\box2d\types.h-280-  /// @code{.cpp}
E:\a327ex\Anchor\engine\include\box2d\types.h-281-  /// enum MyCategories
E:\a327ex\Anchor\engine\include\box2d\types.h-282-  /// {
E:\a327ex\Anchor\engine\include\box2d\types.h-283-  ///    Static  = 0x00000001,
E:\a327ex\Anchor\engine\include\box2d\types.h-284-  ///    Dynamic = 0x00000002,
E:\a327ex\Anchor\engine\include\box2d\types.h-285-  ///    Debris  = 0x00000004,
E:\a327ex\Anchor\engine\include\box2d\types.h-286-  ///    Player  = 0x00000008,
E:\a327ex\Anchor\engine\include\box2d\types.h-287-  ///    // etc
E:\a327ex\Anchor\engine\include\box2d\types.h-288-  /// };
E:\a327ex\Anchor\engine\include\box2d\types.h-289-  /// @endcode
E:\a327ex\Anchor\engine\include\box2d\types.h-290-  uint64_t categoryBits;
E:\a327ex\Anchor\engine\include\box2d\types.h-291-
E:\a327ex\Anchor\engine\include\box2d\types.h-292-  /// The collision mask bits. This states the categories that this
E:\a327ex\Anchor\engine\include\box2d\types.h-293-  /// shape would accept for collision.
E:\a327ex\Anchor\engine\include\box2d\types.h-294-  /// For example, you may want your player to only collide with static objects
E:\a327ex\Anchor\engine\include\box2d\types.h-295-  /// and other players.
E:\a327ex\Anchor\engine\include\box2d\types.h-296-  /// @code{.c}
--
E:\a327ex\Anchor\engine\include\box2d\types.h:702:typedef struct b2FilterJointDef
E:\a327ex\Anchor\engine\include\box2d\types.h-703-{
E:\a327ex\Anchor\engine\include\box2d\types.h-704-  /// Base joint definition
E:\a327ex\Anchor\engine\include\box2d\types.h-705-  b2JointDef base;
E:\a327ex\Anchor\engine\include\box2d\types.h-706-
E:\a327ex\Anchor\engine\include\box2d\types.h-707-  /// Used internally to detect a valid definition. DO NOT SET.
E:\a327ex\Anchor\engine\include\box2d\types.h-708-  int internalValue;
E:\a327ex\Anchor\engine\include\box2d\types.h-709-} b2FilterJointDef;
... [13 more lines]

276→typedef struct b2Filter
   277→{
   278→   /// The collision category bits. Normally you would just set one bit. The category bits should
   279→   /// represent your application object types. For example:
   280→   /// @code{.cpp}
   281→   /// enum MyCategories
   282→   /// {
   283→   ///    Static  = 0x00000001,
   284→   ///    Dynamic = 0x00000002,
   285→   ///    Debris  = 0x00000004,
   286→   ///    Player  = 0x00000008,
   287→   ///    // etc
   288→   /// };
   289→   /// @endcode
   290→   uint64_t categoryBits;
   291→
   292→   /// The collision mask bits. This states the categories that this
   293→   /// shape would accept for collision.
   294→   /// For example, you may want your player to only collide with static objects
   295→   /// and other players.
   296→   /// @code{.c}
   297→   /// maskBits = Static | Player;
   298→   /// @endcode
   299→   uint64_t maskBits;
   300→
   301→   /// Collision groups allow a certain group of objects to never collide (negative)
   302→   /// or always collide (positive). A group index of zero has no effect. Non-zero group filtering
   303→   /// always wins against the mask bits.
   304→   /// For example, you may want ragdolls to collide with other ragdolls but you don't want
   305→   /// ragdoll self-collision. In this case you would give each ragdoll a unique negative group index
... [10 more lines]

2959:static int l_physics_get_body_count(lua_State* L) {
2960-    if (!physics_initialized) {
2961-        lua_pushinteger(L, 0);
2962-        return 1;
2963-    }
2964-
2965-    b2Counters counters = b2World_GetCounters(physics_world);
2966-    lua_pushinteger(L, counters.bodyCount);
2967-    return 1;
2968-}
2969-
2970:static int l_physics_body_is_valid(lua_State* L) {
2971-    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
2972-    if (!body_id) {
2973-        lua_pushboolean(L, 0);
2974-        return 1;
2975-    }
2976-    lua_pushboolean(L, b2Body_IsValid(*body_id));
2977-    return 1;
2978-}
2979-
2980-// Input Lua bindings
2981-static int l_key_is_down(lua_State* L) {
2982-    const char* key_name = luaL_checkstring(L, 1);
2983-    SDL_Scancode scancode = key_name_to_scancode(key_name);
2984-    if (scancode == SDL_SCANCODE_UNKNOWN) {
2985-        lua_pushboolean(L, 0);
--
3348:    lua_register(L, "physics_get_body_count", l_physics_get_body_count);
3349:    lua_register(L, "physics_body_is_valid", l_physics_body_is_valid);
... [15 more lines]

No matches found

178:} PhysicsTag;
179-
180:static PhysicsTag physics_tags[MAX_PHYSICS_TAGS];
181-static int physics_tag_count = 0;
182-
183-// Find tag index by name, returns -1 if not found
184-static int physics_tag_find(const char* name) {
185-    for (int i = 0; i < physics_tag_count; i++) {
186:        if (strcmp(physics_tags[i].name, name) == 0) {
187-            return i;
188-        }
189-    }
190-    return -1;
191-}
--
194:static PhysicsTag* physics_tag_get(int index) {
195-    if (index < 0 || index >= physics_tag_count) return NULL;
196:    return &physics_tags[index];
197-}
198-
199-// Get tag by name (NULL if not found)
200:static PhysicsTag* physics_tag_get_by_name(const char* name) {
201-    int index = physics_tag_find(name);
202-    if (index < 0) return NULL;
203:    return &physics_tags[index];
204-}
205-
206-// Texture
207-typedef struct {
208-    GLuint id;
... [58 more lines]

2970→static int l_physics_body_is_valid(lua_State* L) {
  2971→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  2972→    if (!body_id) {
  2973→        lua_pushboolean(L, 0);
  2974→        return 1;
  2975→    }
  2976→    lua_pushboolean(L, b2Body_IsValid(*body_id));
  2977→    return 1;
  2978→}
  2979→
  2980→// Input Lua bindings
  2981→static int l_key_is_down(lua_State* L) {
  2982→    const char* key_name = luaL_checkstring(L, 1);
  2983→    SDL_Scancode scancode = key_name_to_scancode(key_name);
  2984→    if (scancode == SDL_SCANCODE_UNKNOWN) {
  2985→        lua_pushboolean(L, 0);
  2986→    } else {
  2987→        lua_pushboolean(L, keys_current[scancode]);
  2988→    }
  2989→    return 1;

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  2966→    lua_pushinteger(L, counters.bodyCount);
  2967→    return 1;
  2968→}
  2969→
  2970→static int l_physics_body_is_valid(lua_State* L) {
  2971→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  2972→    if (!body_id) {
  2973→        lua_pushboolean(L, 0);
  2974→        return 1;
  2975→    }
  2976→    lua_pushboolean(L, b2Body_IsValid(*body_id));
  2977→    return 1;
  2978→}
  2979→
  2980→// Helper to setup shape def from tag
  2981→static void setup_shape_def_from_tag(b2ShapeDef* def, PhysicsTag* tag, bool is_sensor) {
  2982→    def->filter.categoryBits = tag->category_bit;
  2983→    def->filter.maskBits = tag->collision_mask;
  2984→    def->isSensor = is_sensor;
  2985→
  2986→    // Enable events based on tag configuration
  2987→    def->enableSensorEvents = (tag->sensor_mask != 0);
  2988→    def->enableContactEvents = (tag->collision_mask != 0);
  2989→    def->enableHitEvents = (tag->hit_mask != 0);
  2990→}
  2991→
  2992→// physics_add_circle(body, tag, radius, [opts])
  2993→static int l_physics_add_circle(lua_State* L) {
  2994→    if (!physics_initialized) {
... [234 more lines]

3593:    lua_register(L, "physics_body_is_valid", l_physics_body_is_valid);
3594-    // Input - Keyboard
3595-    lua_register(L, "key_is_down", l_key_is_down);
3596-    lua_register(L, "key_is_pressed", l_key_is_pressed);

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3589→    lua_register(L, "physics_create_body", l_physics_create_body);
  3590→    lua_register(L, "physics_destroy_body", l_physics_destroy_body);
  3591→    lua_register(L, "physics_get_position", l_physics_get_position);
  3592→    lua_register(L, "physics_get_body_count", l_physics_get_body_count);
  3593→    lua_register(L, "physics_body_is_valid", l_physics_body_is_valid);
  3594→    lua_register(L, "physics_add_circle", l_physics_add_circle);
  3595→    lua_register(L, "physics_add_box", l_physics_add_box);
  3596→    lua_register(L, "physics_add_capsule", l_physics_add_capsule);
  3597→    lua_register(L, "physics_add_polygon", l_physics_add_polygon);
  3598→    // Input - Keyboard
  3599→    lua_register(L, "key_is_down", l_key_is_down);
  3600→    lua_register(L, "key_is_pressed", l_key_is_pressed);
  3601→    lua_register(L, "key_is_released", l_key_is_released);
  3602→    // Input - Mouse

anchor.c
src/anchor.c(264): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(920): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(914): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1306): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1584): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1590): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1700): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1709): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1803): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1805): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2450): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(2806): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

1→print("main.lua loaded - Physics Test (Phase 7 - Step 5: Body Creation)")
     2→
     3→set_shape_filter("rough")
     4→input_bind_all()
     5→
     6→local screen_w, screen_h = 480, 270
     7→local game_layer = layer_create('game')
     8→local bg_color = rgba(30, 30, 35, 255)
     9→local white = rgba(255, 255, 255, 255)
    10→local green = rgba(100, 255, 100, 255)
    11→local yellow = rgba(255, 255, 100, 255)
    12→
    13→-- Initialize physics
    14→physics_init()
    15→physics_set_gravity(0, 500)
    16→physics_set_meter_scale(64)
    17→
    18→-- Create static ground body
    19→local static_body = physics_create_body('static', screen_w/2, screen_h - 30)
    20→print("Created static ground body")
    21→
    22→-- Table to track dynamic bodies
    23→local dynamic_bodies = {}
    24→
    25→function update(dt)
    26→    -- Create body on Space
    27→    if is_pressed('space') then
    28→        local x = math.random(50, screen_w - 50)
    29→        local y = 50
    30→        local body = physics_create_body('dynamic', x, y)
... [28 more lines]

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→print("main.lua loaded - Physics Test (Phase 7 - Step 6: Shape Creation)")
     2→
     3→set_shape_filter("rough")
     4→input_bind_all()
     5→
     6→local screen_w, screen_h = 480, 270
     7→local game_layer = layer_create('game')
     8→local bg_color = rgba(30, 30, 35, 255)
     9→local white = rgba(255, 255, 255, 255)
    10→local green = rgba(100, 255, 100, 255)
    11→local yellow = rgba(255, 255, 100, 255)
    12→
    13→-- Initialize physics
    14→physics_init()
    15→physics_set_gravity(0, 500)
    16→physics_set_meter_scale(64)
    17→
    18→-- Register physics tags
    19→physics_register_tag('ground')
    20→physics_register_tag('ball')
    21→
    22→-- Enable collision between balls and ground
    23→physics_enable_collision('ball', 'ground')
    24→physics_enable_collision('ball', 'ball')
    25→
    26→-- Create static ground body with box shape
    27→local static_body = physics_create_body('static', screen_w/2, screen_h - 20)
    28→physics_add_box(static_body, 'ground', screen_w, 20)
    29→print("Created static ground body with box shape")
... [7 more lines]

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    31→-- Table to track dynamic bodies
    32→local dynamic_bodies = {}
    33→
    34→function update(dt)
    35→    -- Create body on Space
    36→    if is_pressed('space') then
    37→        local x = math.random(50, screen_w - 50)
    38→        local y = 50
    39→        local body = physics_create_body('dynamic', x, y)
    40→        physics_add_circle(body, 'ball', 15)
    41→        table.insert(dynamic_bodies, body)
    42→        print(string.format("Created ball at %.0f, %.0f - Lua: %d, Box2D: %d", x, y, #dynamic_bodies, physics_get_body_count()))
    43→    end
    44→
    45→    -- Destroy oldest body on D
    46→    if is_pressed('d') and #dynamic_bodies > 0 then
    47→        local body = table.remove(dynamic_bodies, 1)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    51→
    52→    -- Draw
    53→    layer_rectangle(game_layer, 0, 0, screen_w, screen_h, bg_color)
    54→
    55→    -- Draw ground (green rectangle)
    56→    local sx, sy = physics_get_position(static_body)
    57→    layer_rectangle(game_layer, sx - screen_w/2, sy - 10, screen_w, 20, green)
    58→
    59→    -- Draw dynamic bodies (yellow)
    60→    for i, body in ipairs(dynamic_bodies) do
    61→        if physics_body_is_valid(body) then

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

E:\a327ex\Anchor\reference\phase-4-effects-analysis.md

No files found

E:\a327ex\Anchor\reference\anchor-loop-analysis.md
E:\a327ex\Anchor\reference\fixed-timestep-details.md
E:\a327ex\Anchor\reference\shader-setup-explained.md
E:\a327ex\Anchor\reference\strudel-chiptune-guide.md
E:\a327ex\Anchor\reference\pixel-perfect-research.md
E:\a327ex\Anchor\reference\frame-timing-analysis.md
E:\a327ex\Anchor\reference\anchor-project-review.md
E:\a327ex\Anchor\reference\phase-review-findings.md
E:\a327ex\Anchor\reference\phase-4-effects-analysis.md
E:\a327ex\Anchor\reference\input-system-research.md
E:\a327ex\Anchor\reference\box2d-3-api-proposal.md

<persisted-output>
Output too large (135.2KB). Full output saved to: C:\Users\adn\.claude\projects\E--a327ex-Anchor\3ab4304c-51be-46ed-aed2-05eb85d548fc\tool-results\toolu_01XMbbQ32fCZsvv46R92PqKb.txt

Preview (first 2KB):
E:\a327ex\Anchor\reference\anchor-loop-analysis.md:211:    glClear(GL_COLOR_BUFFER_BIT);
E:\a327ex\Anchor\reference\anchor-loop-analysis.md:293:function layer:circle(x, y, rs, color, line_width, z)
E:\a327ex\Anchor\reference\anchor-project-review.md:117:2. **Will there be a layer:clear() function?** Currently layers composite with transparency. What if a layer needs to be fully cleared between frames with a specific color? `glClear()` uses transparent black.
E:\a327ex\Anchor\reference\anchor-project-review.md:158:The project is in good shape. Phases 1-3 are solidly complete with thoughtful technical decisions. The documentation is unusually thorough. The main risk areas are:
E:\a327ex\Anchor\reference\examples.yue:18:       game\circle @x, @y, 5, colors.white
E:\a327ex\Anchor\reference\examples.yue:26:              game\circle @x, @y, 8, an.colors.white
E:\a327ex\Anchor\reference\examples.yue:45:       game\circle @x, @y, 5, colors.white
E:\a327ex\Anchor\reference\examples.yue:75:      game\circle @x, @y, 12, colors.green
E:\a327ex\Anchor\reference\examples.yue:121:                      game\circle @x, @y, 8, colors.white)
E:\a327ex\Anchor\reference\examples.yue:134:                 game\circle @x, @y, 8, an.colors.white
E:\a327ex\Anchor\reference\examples.yue:145:           effects\circle @x, @y, 3, colors.white
E:\a327ex\Anchor\reference\examples.yue:166:E! ^ {x: 100} / (dt) => game\circle @x, @y, 5, colors.white >> arena
E:\a327ex\Anchor\reference\examples.yue:169:E 'ball' ^ {x: 100} / (dt) => game\circle @x, @y, 5, colors.white >> arena
E:\a327ex\Anchor\reference\phase-4-effects-analysis.md:3:A comprehensive analysis of shader/effect requirements for Anchor, based on examination of Super Emoji Box, BYTEPATH, and general 2D game effect patterns.
E:\a327ex\Anchor\reference\phase-4-effects-analysis.md:9:1. [Usage Analysis: Super Emoji Box](#usage-analysis-super-emoji-box)
E:\a327ex\Anchor\reference\phase-4-effects-analysis.md:22:## Usage Analysis: Super Emoji Box
...
</persisted-output>

<persisted-output>
Output too large (34.2KB). Full output saved to: C:\Users\adn\.claude\projects\E--a327ex-Anchor\3ab4304c-51be-46ed-aed2-05eb85d548fc\tool-results\toolu_0171EXMbupkH2CgraEpE9bo9.txt

Preview (first 2KB):
E:\a327ex\Anchor\reference\phase-4-effects-analysis.md:3:A comprehensive analysis of shader/effect requirements for Anchor, based on examination of Super Emoji Box, BYTEPATH, and general 2D game effect patterns.
E:\a327ex\Anchor\reference\phase-4-effects-analysis.md:9:1. [Usage Analysis: Super Emoji Box](#usage-analysis-super-emoji-box)
E:\a327ex\Anchor\reference\phase-4-effects-analysis.md:22:## Usage Analysis: Super Emoji Box
E:\a327ex\Anchor\reference\phase-4-effects-analysis.md:24:Super Emoji Box uses a **simple, layer-based effect system** with three shaders:
E:\a327ex\Anchor\reference\phase-4-effects-analysis.md:100:| `flat_color.frag` | Solid color fill | — |
E:\a327ex\Anchor\reference\phase-4-effects-analysis.md:135:- **Tint:** Multiply or blend with solid color
E:\a327ex\Anchor\reference\phase-4-effects-analysis.md:213:For emoji-style games, **layer-level outline** is what's used (Super Emoji Box style).
E:\a327ex\Anchor\reference\shader-setup-explained.md:70:**Interpolation:** If triangle vertices have different colors, the GPU automatically interpolates between them for each pixel. We're using solid colors, so all three vertices have the same color.
E:\a327ex\Anchor\website\context\SHAPES_PLAN.md:658:Shapes can be filled with a texture instead of solid color:
E:\a327ex\Anchor\website\context\ANCHOR_IMPLEMENTATION_PLAN.md:92:- [x] Clear screen to solid color
E:\a327ex\Anchor\docs\SHAPES_PLAN.md:658:Shapes can be filled with a texture instead of solid color:
E:\a327ex\Anchor\docs\ANCHOR_IMPLEMENTATION_PLAN.md:92:- [x] Clear screen to solid color
E:\a327ex\Anchor\reference\super emoji box\main.lua:4:  lun:engine_start('super emoji box', 640, 360, 2.5, 2.5, 'twitter_emoji', 'rough', true)
E:\a327ex\Anchor\reference\super emoji box\main.lua:265:  for _, vertices in ipairs(lun.tiled_maps.basic:tiled_map_get_solid_vertices(-40, -40)) do self.solids:add(solid(vertices, lun.colors.green[0])) end
...
</persisted-output>

260→function arena:new(x, y, args)
   261→  self:object('arena', args)
   262→  self:timer()
   263→
   264→  self:add(object('solids'))
   265→  for _, vertices in ipairs(lun.tiled_maps.basic:tiled_map_get_solid_vertices(-40, -40)) do self.solids:add(solid(vertices, lun.colors.green[0])) end
   266→  self:add(object('plants'))
   267→  self:spawn_plants(0, -40)
   268→
   269→  self:add(object('players'))
   270→  self:add(object('enemies'))
   271→  self.players:add(player(lun.w/2, lun.h/2))
   272→end
   273→
   274→function arena:update(dt)
   275→  if lun:is_pressed('p') then
   276→    lun:timer_every(0.4, function()
   277→      self.enemies:add(alien(lun.w/2, 40, 1))
   278→    end, 5, true)
   279→  end

E:\a327ex\Anchor\test\old_main.lua
E:\a327ex\Anchor\test\input_tests.lua
E:\a327ex\Anchor\test\main.lua

1→print("main.lua loaded")
     2→
     3→-- Set to "rough" for hard pixel edges, "smooth" for anti-aliased
     4→set_shape_filter("rough")
     5→
     6→local screen_w, screen_h = 480, 270
     7→
     8→-- HSV to RGB (h: 0-360, s: 0-1, v: 0-1)
     9→local function hsv_to_rgb(h, s, v)
    10→    local c = v * s
    11→    local x = c * (1 - math.abs((h / 60) % 2 - 1))
    12→    local m = v - c
    13→    local r, g, b = 0, 0, 0
    14→    if h < 60 then r, g, b = c, x, 0
    15→    elseif h < 120 then r, g, b = x, c, 0
    16→    elseif h < 180 then r, g, b = 0, c, x
    17→    elseif h < 240 then r, g, b = 0, x, c
    18→    elseif h < 300 then r, g, b = x, 0, c
    19→    else r, g, b = c, 0, x
    20→    end
    21→    return math.floor((r + m) * 255), math.floor((g + m) * 255), math.floor((b + m) * 255)
    22→end
    23→
    24→--{{{ Circle size comparison test
    25→--[[
    26→local top_circles = {}
    27→local rows = {{}, {}}  -- track circles per row for centering
    28→local radius = 1
    29→local spacing = 2  -- gap between circles
    30→local x = 0
... [513 more lines]

No files found

1→print("Input Test")
     2→
     3→set_shape_filter("rough")
     4→
     5→local screen_w, screen_h = 480, 270
     6→
     7→input_bind_all()
     8→input_bind_chord("super_action", {"lshift", "space"})
     9→input_bind_sequence("dash", {"d", 0.3, "d"})
    10→input_bind_hold("charge", 1.0, "space")
    11→
    12→input_bind("move_up", "key:w")
    13→input_bind("move_up", "key:up")
    14→input_bind("move_down", "key:s")
    15→input_bind("move_down", "key:down")
    16→input_bind("move_left", "key:a")
    17→input_bind("move_left", "key:left")
    18→input_bind("move_right", "key:d")
    19→input_bind("move_right", "key:right")
    20→input_bind("action", "key:space")
    21→input_bind("action", "mouse:1")
    22→
    23→local bg_color = rgba(231, 232, 233, 255)
    24→local bg_layer = layer_create("background")
    25→local shadow_layer = layer_create("shadow")
    26→local outline_layer = layer_create("outline")
    27→local game_layer = layer_create("game")
    28→
    29→local shadow_shader = shader_load_file("shaders/shadow.frag")
    30→local outline_shader = shader_load_file("shaders/outline.frag")
... [127 more lines]

E:\a327ex\Anchor\reference\super emoji box\main.lua:265:  for _, vertices in ipairs(lun.tiled_maps.basic:tiled_map_get_solid_vertices(-40, -40)) do self.solids:add(solid(vertices, lun.colors.green[0])) end
E:\a327ex\Anchor\reference\super emoji box\lun\lun.lua:216:        green = object():color_255(139, 191, 64, 255, 0.025),
E:\a327ex\Anchor\reference\super emoji box\lun\lun.lua:230:        green = object():color_hex('#79b159ff', 0.025),
E:\a327ex\Anchor\reference\super emoji box\lun\lun.lua:245:        green = object():color_255(122, 179, 87, 255, 0.01),
E:\a327ex\Anchor\reference\super emoji box\lun\lun.lua:260:        green = object():color_255(125, 180, 64, 255, 0.025),
E:\a327ex\Anchor\reference\super emoji box\lun\lun.lua:343:        green = object():color_255(99, 225, 46, 255, 0.01),
E:\a327ex\Anchor\reference\super emoji box\lun\lun.lua:369:        green = {

210→        gray = object():color_255(128, 128, 128, 255, 0.025),
   211→        bg = object():color_255(48, 48, 48, 255, 0.025),
   212→        fg = object():color_255(218, 218, 218, 255, 0.025),
   213→        yellow = object():color_255(250, 207, 0, 255, 0.025),
   214→        orange = object():color_255(240, 112, 33, 255, 0.025),
   215→        blue = object():color_255(1, 155, 214, 255, 0.025),
   216→        green = object():color_255(139, 191, 64, 255, 0.025),
   217→        red = object():color_255(233, 29, 57, 255, 0.025),
   218→        purple = object():color_255(142, 85, 158, 255, 0.025),
   219→      }
   220→    elseif self.theme == 'bytepath' then -- https =//coolors.co/191516-f5efed-52b3cb-b26ca1-79b159-ffb833-f4903e-d84654
   221→      self.colors = {
   222→        white = object():color_255(255, 255, 255, 255, 0.025),
   223→        black = object():color_255(0, 0, 0, 255, 0.025),
   224→        gray = object():color_255(128, 128, 128, 255, 0.025),
   225→        bg = object():color_hex('#111111ff', 0.025),
   226→        fg = object():color_hex('#dededeff', 0.025),
   227→        yellow = object():color_hex('#ffb833ff', 0.025),
   228→        orange = object():color_hex('#f4903eff', 0.025),
   229→        blue = object():color_hex('#52b3cbff', 0.025),
   230→        green = object():color_hex('#79b159ff', 0.025),
   231→        red = object():color_hex('#d84654ff', 0.025),
   232→        purple = object():color_hex('#b26ca1ff', 0.025),
   233→      }
   234→    elseif self.theme == 'twitter_emoji' then -- colors taken from twitter emoji set
   235→      self.colors = {
   236→        white = object():color_255(255, 255, 255, 255, 0.01),
   237→        black = object():color_255(0, 0, 0, 255, 0.01),
   238→        gray = object():color_255(128, 128, 128, 255, 0.01),
   239→        bg = object():color_255(48, 49, 50, 255, 0.01),

234→    elseif self.theme == 'twitter_emoji' then -- colors taken from twitter emoji set
   235→      self.colors = {
   236→        white = object():color_255(255, 255, 255, 255, 0.01),
   237→        black = object():color_255(0, 0, 0, 255, 0.01),
   238→        gray = object():color_255(128, 128, 128, 255, 0.01),
   239→        bg = object():color_255(48, 49, 50, 255, 0.01),
   240→        fg = object():color_255(231, 232, 233, 255, 0.01),
   241→        fg_dark = object():color_255(201, 202, 203, 255, 0.01),
   242→        yellow = object():color_255(253, 205, 86, 255, 0.01),
   243→        orange = object():color_255(244, 146, 0, 255, 0.01),
   244→        blue = object():color_255(83, 175, 239, 255, 0.01),
   245→        green = object():color_255(122, 179, 87, 255, 0.01),
   246→        red = object():color_255(223, 37, 64, 255, 0.01),
   247→        purple = object():color_255(172, 144, 216, 255, 0.01),
   248→        brown = object():color_255(195, 105, 77, 255, 0.01),
   249→      }
   250→    elseif self.theme == 'google_noto' then -- colors taken from google noto emoji set
   251→      self.colors = {
   252→        white = object():color_255(255, 255, 255, 255, 0.025),
   253→        black = object():color_255(0, 0, 0, 255, 0.025),
   254→        gray = object():color_255(128, 128, 128, 255, 0.025),
   255→        bg = object():color_255(66, 66, 66, 255, 0.025),
   256→        fg = object():color_255(224, 224, 224, 255, 0.025),
   257→        yellow = object():color_255(255, 205, 46, 255, 0.025),
   258→        orange = object():color_255(255, 133, 0, 255, 0.025),
   259→        blue = object():color_255(18, 119, 211, 255, 0.025),
   260→        green = object():color_255(125, 180, 64, 255, 0.025),
   261→        red = object():color_255(244, 65, 51, 255, 0.025),
   262→        purple = object():color_255(172, 69, 189, 255, 0.025),
   263→        brown = object():color_255(184, 109, 83, 255, 0.025),

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→print("main.lua loaded - Physics Test (Phase 7 - Step 6: Shape Creation)")
     2→
     3→set_shape_filter("rough")
     4→input_bind_all()
     5→
     6→local screen_w, screen_h = 480, 270
     7→
     8→-- Colors (twitter_emoji theme from super emoji box)
     9→local bg_color = rgba(231, 232, 233, 255)
    10→local green = rgba(122, 179, 87, 255)
    11→
    12→-- Layers (bottom to top: background, shadow, outline, game)
    13→local bg_layer = layer_create('background')
    14→local shadow_layer = layer_create('shadow')
    15→local outline_layer = layer_create('outline')
    16→local game_layer = layer_create('game')
    17→
    18→-- Shaders
    19→local shadow_shader = shader_load_file("shaders/shadow.frag")
    20→local outline_shader = shader_load_file("shaders/outline.frag")
    21→
    22→-- Textures
    23→local smile_tex = texture_load("assets/slight_smile.png")
    24→local smile_size = 30
    25→local smile_scale = smile_size / texture_get_width(smile_tex)
    26→
    27→-- Initialize physics
    28→physics_init()
    29→physics_set_gravity(0, 500)
... [80 more lines]

2947:static int l_physics_get_position(lua_State* L) {
2948-    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
2949-    if (!body_id || !b2Body_IsValid(*body_id)) {
2950-        return luaL_error(L, "Invalid body");
2951-    }
2952-
2953-    b2Vec2 pos = b2Body_GetPosition(*body_id);
2954-    lua_pushnumber(L, pos.x * pixels_per_meter);
2955-    lua_pushnumber(L, pos.y * pixels_per_meter);
2956-    return 2;
2957-}
2958-
2959-static int l_physics_get_body_count(lua_State* L) {
2960-    if (!physics_initialized) {
2961-        lua_pushinteger(L, 0);
2962-        return 1;
--
3591:    lua_register(L, "physics_get_position", l_physics_get_position);
3592-    lua_register(L, "physics_get_body_count", l_physics_get_body_count);
3593-    lua_register(L, "physics_body_is_valid", l_physics_body_is_valid);
3594-    lua_register(L, "physics_add_circle", l_physics_add_circle);
3595-    lua_register(L, "physics_add_box", l_physics_add_box);
3596-    lua_register(L, "physics_add_capsule", l_physics_add_capsule);
3597-    lua_register(L, "physics_add_polygon", l_physics_add_polygon);
3598-    // Input - Keyboard
3599-    lua_register(L, "key_is_down", l_key_is_down);
3600-    lua_register(L, "key_is_pressed", l_key_is_pressed);
3601-    lua_register(L, "key_is_released", l_key_is_released);
3602-    // Input - Mouse
3603-    lua_register(L, "mouse_position", l_mouse_position);
... [3 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  2943→    }
  2944→    return 0;
  2945→}
  2946→
  2947→static int l_physics_get_position(lua_State* L) {
  2948→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  2949→    if (!body_id || !b2Body_IsValid(*body_id)) {
  2950→        return luaL_error(L, "Invalid body");
  2951→    }
  2952→
  2953→    b2Vec2 pos = b2Body_GetPosition(*body_id);
  2954→    lua_pushnumber(L, pos.x * pixels_per_meter);
  2955→    lua_pushnumber(L, pos.y * pixels_per_meter);
  2956→    return 2;
  2957→}
  2958→
  2959→static int l_physics_get_angle(lua_State* L) {
  2960→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  2961→    if (!body_id || !b2Body_IsValid(*body_id)) {
  2962→        return luaL_error(L, "Invalid body");
  2963→    }
  2964→
  2965→    b2Rot rot = b2Body_GetRotation(*body_id);
  2966→    float angle = b2Rot_GetAngle(rot);
  2967→    lua_pushnumber(L, angle);
  2968→    return 1;
  2969→}
  2970→
  2971→static int l_physics_get_body_count(lua_State* L) {
... [4 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3599→    lua_register(L, "physics_enable_hit", l_physics_enable_hit);
  3600→    lua_register(L, "physics_tags_collide", l_physics_tags_collide);
  3601→    lua_register(L, "physics_create_body", l_physics_create_body);
  3602→    lua_register(L, "physics_destroy_body", l_physics_destroy_body);
  3603→    lua_register(L, "physics_get_position", l_physics_get_position);
  3604→    lua_register(L, "physics_get_angle", l_physics_get_angle);
  3605→    lua_register(L, "physics_get_body_count", l_physics_get_body_count);
  3606→    lua_register(L, "physics_body_is_valid", l_physics_body_is_valid);
  3607→    lua_register(L, "physics_add_circle", l_physics_add_circle);
  3608→    lua_register(L, "physics_add_box", l_physics_add_box);
  3609→    lua_register(L, "physics_add_capsule", l_physics_add_capsule);

anchor.c
src/anchor.c(264): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(920): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(914): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1306): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1584): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1590): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1700): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1709): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1803): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1805): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2450): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(2806): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    36→-- Enable collision between balls and ground
    37→physics_enable_collision('ball', 'ground')
    38→physics_enable_collision('ball', 'ball')
    39→
    40→-- Create static ground body with box shape (90% width, drawn as rounded rectangle)
    41→local ground_width = screen_w * 0.9
    42→local ground_height = 12
    43→local ground_radius = 6
    44→local static_body = physics_create_body('static', screen_w/2, screen_h - 20)
    45→physics_add_box(static_body, 'ground', ground_width, ground_height)
    46→print("Created static ground body with box shape")
    47→
    48→-- Table to track dynamic bodies
    49→local dynamic_bodies = {}
    50→

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    47→
    48→-- Table to track dynamic bodies
    49→local dynamic_bodies = {}
    50→
    51→local function draw_objects(layer)
    52→    -- Draw ground (box physics, drawn as rounded rectangle visually)
    53→    local sx, sy = physics_get_position(static_body)
    54→    local half_w = ground_width / 2
    55→    local half_h = ground_height / 2
    56→    -- Draw as rounded rectangle: center rect + two end circles
    57→    layer_rectangle(layer, sx - half_w + ground_radius, sy - half_h, ground_width - ground_radius * 2, ground_height, green)
    58→    layer_circle(layer, sx - half_w + ground_radius, sy, ground_radius, green)
    59→    layer_circle(layer, sx + half_w - ground_radius, sy, ground_radius, green)
    60→
    61→    -- Draw dynamic bodies (emoji balls)
    62→    for i, body in ipairs(dynamic_bodies) do
    63→        if physics_body_is_valid(body) then

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    18→-- Shaders
    19→local shadow_shader = shader_load_file("shaders/shadow.frag")
    20→local outline_shader = shader_load_file("shaders/outline.frag")
    21→
    22→-- Textures
    23→local smile_tex = texture_load("assets/slight_smile.png")
    24→local smile_size = 20
    25→local smile_scale = smile_size / texture_get_width(smile_tex)
    26→
    27→-- Initialize physics
    28→physics_init()
    29→physics_set_gravity(0, 500)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    36→-- Enable collision between balls and ground
    37→physics_enable_collision('ball', 'ground')
    38→physics_enable_collision('ball', 'ball')
    39→
    40→-- Create static ground body with box shape (90% width, drawn as rounded rectangle)
    41→local ground_width = screen_w * 0.9
    42→local ground_height = 12
    43→local ground_radius = 6
    44→local ground_body = physics_create_body('static', screen_w/2, screen_h - 20)
    45→physics_add_box(ground_body, 'ground', ground_width, ground_height)
    46→
    47→-- Create left and right walls
    48→local wall_width = 12
    49→local wall_height = 120
    50→local wall_x_offset = ground_width / 2 - wall_width / 2
    51→local wall_y = screen_h - 20 - ground_height / 2 - wall_height / 2
    52→
    53→local left_wall = physics_create_body('static', screen_w/2 - wall_x_offset, wall_y)
    54→physics_add_box(left_wall, 'ground', wall_width, wall_height)
    55→
    56→local right_wall = physics_create_body('static', screen_w/2 + wall_x_offset, wall_y)
    57→physics_add_box(right_wall, 'ground', wall_width, wall_height)
    58→
    59→print("Created ground and walls")
    60→
    61→-- Table to track dynamic bodies
    62→local dynamic_bodies = {}
    63→

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    60→
    61→-- Table to track dynamic bodies
    62→local dynamic_bodies = {}
    63→
    64→local function draw_objects(layer)
    65→    -- Draw ground (box physics, drawn as rounded rectangle visually)
    66→    local gx, gy = physics_get_position(ground_body)
    67→    local half_w = ground_width / 2
    68→    local half_h = ground_height / 2
    69→    -- Draw as rounded rectangle: center rect + two end circles
    70→    layer_rectangle(layer, gx - half_w + ground_radius, gy - half_h, ground_width - ground_radius * 2, ground_height, green)
    71→    layer_circle(layer, gx - half_w + ground_radius, gy, ground_radius, green)
    72→    layer_circle(layer, gx + half_w - ground_radius, gy, ground_radius, green)
    73→
    74→    -- Draw walls (as rounded rectangles)
    75→    local lx, ly = physics_get_position(left_wall)
    76→    layer_rectangle(layer, lx - wall_width/2, ly - wall_height/2 + ground_radius, wall_width, wall_height - ground_radius, green)
    77→    layer_circle(layer, lx, ly - wall_height/2 + ground_radius, ground_radius, green)
    78→
    79→    local rx, ry = physics_get_position(right_wall)
    80→    layer_rectangle(layer, rx - wall_width/2, ry - wall_height/2 + ground_radius, wall_width, wall_height - ground_radius, green)
    81→    layer_circle(layer, rx, ry - wall_height/2 + ground_radius, ground_radius, green)
    82→
    83→    -- Draw dynamic bodies (emoji balls)
    84→    for i, body in ipairs(dynamic_bodies) do
    85→        if physics_body_is_valid(body) then

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    43→local ground_radius = 6
    44→local ground_body = physics_create_body('static', screen_w/2, screen_h - 20)
    45→physics_add_box(ground_body, 'ground', ground_width, ground_height)
    46→
    47→-- Create left and right walls (go up to 10% from top)
    48→local wall_width = 12
    49→local wall_top = screen_h * 0.1
    50→local ground_top = screen_h - 20 - ground_height / 2
    51→local wall_height = ground_top - wall_top
    52→local wall_x_offset = ground_width / 2 - wall_width / 2
    53→local wall_y = wall_top + wall_height / 2
    54→
    55→local left_wall = physics_create_body('static', screen_w/2 - wall_x_offset, wall_y)
    56→physics_add_box(left_wall, 'ground', wall_width, wall_height)
    57→

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    62→
    63→-- Table to track dynamic bodies
    64→local dynamic_bodies = {}
    65→
    66→local function draw_objects(layer)
    67→    -- Draw ground (plain rectangle)
    68→    local gx, gy = physics_get_position(ground_body)
    69→    layer_rectangle(layer, gx - ground_width/2, gy - ground_height/2, ground_width, ground_height, green)
    70→
    71→    -- Draw walls (plain rectangles)
    72→    local lx, ly = physics_get_position(left_wall)
    73→    layer_rectangle(layer, lx - wall_width/2, ly - wall_height/2, wall_width, wall_height, green)
    74→
    75→    local rx, ry = physics_get_position(right_wall)
    76→    layer_rectangle(layer, rx - wall_width/2, ry - wall_height/2, wall_width, wall_height, green)
    77→
    78→    -- Draw dynamic bodies (emoji balls)
    79→    for i, body in ipairs(dynamic_bodies) do
    80→        if physics_body_is_valid(body) then

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    67→    -- Draw ground (plain rectangle)
    68→    local gx, gy = physics_get_position(ground_body)
    69→    layer_rectangle(layer, gx - ground_width/2, gy - ground_height/2, ground_width, ground_height, green)
    70→
    71→    -- Draw walls (rounded tops)
    72→    local lx, ly = physics_get_position(left_wall)
    73→    layer_rectangle(layer, lx - wall_width/2, ly - wall_height/2 + ground_radius, wall_width, wall_height - ground_radius, green)
    74→    layer_circle(layer, lx, ly - wall_height/2 + ground_radius, ground_radius, green)
    75→
    76→    local rx, ry = physics_get_position(right_wall)
    77→    layer_rectangle(layer, rx - wall_width/2, ry - wall_height/2 + ground_radius, wall_width, wall_height - ground_radius, green)
    78→    layer_circle(layer, rx, ry - wall_height/2 + ground_radius, ground_radius, green)
    79→
    80→    -- Draw dynamic bodies (emoji balls)
    81→    for i, body in ipairs(dynamic_bodies) do
    82→        if physics_body_is_valid(body) then

1045→**Step 7: Body properties**
  1046→- [ ] Position/rotation:
  1047→  - `physics_get_position(body)` → x, y (pixels)
  1048→  - `physics_get_angle(body)` → radians
  1049→  - `physics_set_position(body, x, y)`
  1050→  - `physics_set_angle(body, angle)`
  1051→  - `physics_set_transform(body, x, y, angle)`
  1052→- [ ] Velocity:
  1053→  - `physics_get_velocity(body)` → vx, vy (pixels/sec)
  1054→  - `physics_get_angular_velocity(body)` → rad/sec
  1055→  - `physics_set_velocity(body, vx, vy)`
  1056→  - `physics_set_angular_velocity(body, av)`
  1057→- [ ] Forces/impulses (all in pixel units, convert internally):
  1058→  - `physics_apply_force(body, fx, fy)`
  1059→  - `physics_apply_force_at(body, fx, fy, px, py)`
  1060→  - `physics_apply_impulse(body, ix, iy)`
  1061→  - `physics_apply_impulse_at(body, ix, iy, px, py)`
  1062→  - `physics_apply_torque(body, torque)`
  1063→  - `physics_apply_angular_impulse(body, impulse)`
  1064→- [ ] Properties:
  1065→  - `physics_set_linear_damping(body, damping)`
  1066→  - `physics_set_angular_damping(body, damping)`
  1067→  - `physics_set_gravity_scale(body, scale)`
  1068→  - `physics_set_fixed_rotation(body, bool)`
  1069→  - `physics_set_bullet(body, bool)` — enable CCD
  1070→- [ ] User data:
  1071→  - `physics_set_user_data(body, id)` — store integer ID
  1072→  - `physics_get_user_data(body)` → integer ID
  1073→
  1074→**Step 8: Event buffering**
... [5 more lines]

995→
   996→---
   997→
   998→### Implementation Steps
   999→
  1000→**Step 1: Box2D integration**
  1001→- [ ] Download Box2D 3.x source from GitHub
  1002→- [ ] Add to `engine/include/` (header-only or compiled as needed)
  1003→- [ ] Update `build.bat` to compile/link Box2D
  1004→- [ ] Update `build-web.sh` for Emscripten compatibility
  1005→- [ ] Verify compilation on Windows and Web
  1006→
  1007→**Step 2: World setup**
  1008→- [ ] `physics_init()` — create `b2WorldId` with `b2DefaultWorldDef()`
  1009→- [ ] `physics_set_gravity(gx, gy)` — set gravity in pixels/sec² (convert to meters internally)
  1010→- [ ] `physics_set_meter_scale(scale)` — configure pixels-per-meter (default 64)
  1011→- [ ] Integrate `b2World_Step()` into main loop (use existing 120Hz physics rate)
  1012→- [ ] `physics_set_enabled(bool)` — pause/resume simulation
  1013→- [ ] Cleanup on shutdown
  1014→
  1015→**Step 3: Tag system**
  1016→- [ ] Tag registry: string name → 64-bit category bit (max 64 tags)
  1017→- [ ] `physics_register_tag(name)` — assigns next available bit
  1018→- [ ] Store tag info: name, category bit, collision mask, sensor mask, hit mask
  1019→- [ ] Internal lookup functions: tag name → category bit, shape → tag name
  1020→
  1021→**Step 4: Collision configuration**
  1022→- [ ] `physics_enable_collision(tag_a, tag_b)` — sets mask bits for physical collision
  1023→- [ ] `physics_disable_collision(tag_a, tag_b)` — clears mask bits
  1024→- [ ] `physics_enable_sensor(tag_a, tag_b)` — marks pair for sensor events
... [60 more lines]

The file E:\a327ex\Anchor\docs\ANCHOR_IMPLEMENTATION_PLAN.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   996→---
   997→
   998→### Implementation Steps
   999→
  1000→**Step 1: Box2D integration**
  1001→- [x] Download Box2D 3.x source from GitHub
  1002→- [x] Add to `engine/include/box2d/` (compiled as static library)
  1003→- [x] Update `build.bat` to compile/link Box2D (with `/std:c17` for C11 support)
  1004→- [x] Update `build-web.sh` for Emscripten compatibility (with `-DBOX2D_DISABLE_SIMD`)
  1005→- [x] Verify compilation on Windows and Web
  1006→
  1007→**Step 2: World setup**
  1008→- [x] `physics_init()` — create `b2WorldId` with `b2DefaultWorldDef()`
  1009→- [x] `physics_set_gravity(gx, gy)` — set gravity in pixels/sec² (convert to meters internally)
  1010→- [x] `physics_set_meter_scale(scale)` — configure pixels-per-meter (default 64)
  1011→- [x] Integrate `b2World_Step()` into main loop (use existing 120Hz physics rate)
  1012→- [x] `physics_set_enabled(bool)` — pause/resume simulation
  1013→- [x] Cleanup on shutdown
  1014→
  1015→**Step 3: Tag system**
  1016→- [x] Tag registry: string name → 64-bit category bit (max 64 tags)
  1017→- [x] `physics_register_tag(name)` — assigns next available bit
  1018→- [x] Store tag info: name, category bit, collision mask, sensor mask, hit mask
  1019→- [x] Internal lookup functions: tag name → category bit, shape → tag name
  1020→
  1021→**Step 4: Collision configuration**
  1022→- [x] `physics_enable_collision(tag_a, tag_b)` — sets mask bits for physical collision
  1023→- [x] `physics_disable_collision(tag_a, tag_b)` — clears mask bits
  1024→- [x] `physics_enable_sensor(tag_a, tag_b)` — marks pair for sensor events
... [34 more lines]

E:\a327ex\Anchor\engine\include\box2d\box2d.h:228:B2_API void b2Body_SetType( b2BodyId bodyId, b2BodyType type );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:231:B2_API void b2Body_SetName( b2BodyId bodyId, const char* name );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:237:B2_API void b2Body_SetUserData( b2BodyId bodyId, void* userData );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:254:B2_API void b2Body_SetTransform( b2BodyId bodyId, b2Vec2 position, b2Rot rotation );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:275:B2_API void b2Body_SetLinearVelocity( b2BodyId bodyId, b2Vec2 linearVelocity );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:278:B2_API void b2Body_SetAngularVelocity( b2BodyId bodyId, float angularVelocity );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:288:B2_API void b2Body_SetTargetTransform( b2BodyId bodyId, b2Transform target, float timeStep, bool wake );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:370:B2_API void b2Body_SetMassData( b2BodyId bodyId, b2MassData massData );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:384:B2_API void b2Body_SetLinearDamping( b2BodyId bodyId, float linearDamping );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:390:B2_API void b2Body_SetAngularDamping( b2BodyId bodyId, float angularDamping );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:397:B2_API void b2Body_SetGravityScale( b2BodyId bodyId, float gravityScale );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:408:B2_API void b2Body_SetAwake( b2BodyId bodyId, bool awake );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:420:B2_API void b2Body_SetSleepThreshold( b2BodyId bodyId, float sleepThreshold );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:435:B2_API void b2Body_SetMotionLocks( b2BodyId bodyId, b2MotionLocks locks );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:442:B2_API void b2Body_SetBullet( b2BodyId bodyId, bool flag );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:553:B2_API void b2Shape_SetFriction( b2ShapeId shapeId, float friction );
E:\a327ex\Anchor\engine\include\box2d\box2d.h:559:B2_API void b2Shape_SetRestitution( b2ShapeId shapeId, float restitution );
E:\a327ex\Anchor\engine\include\box2d\body.c:725:void b2Body_SetTransform( b2BodyId bodyId, b2Vec2 position, b2Rot rotation )
E:\a327ex\Anchor\engine\include\box2d\body.c:804:void b2Body_SetLinearVelocity( b2BodyId bodyId, b2Vec2 linearVelocity )
E:\a327ex\Anchor\engine\include\box2d\body.c:828:void b2Body_SetAngularVelocity( b2BodyId bodyId, float angularVelocity )
E:\a327ex\Anchor\engine\include\box2d\body.c:852:void b2Body_SetTargetTransform( b2BodyId bodyId, b2Transform target, float timeStep, bool wake )
E:\a327ex\Anchor\engine\include\box2d\body.c:1136:void b2Body_SetType( b2BodyId bodyId, b2BodyType type )
E:\a327ex\Anchor\engine\include\box2d\body.c:1325:void b2Body_SetName( b2BodyId bodyId, const char* name )
E:\a327ex\Anchor\engine\include\box2d\body.c:1358:void b2Body_SetUserData( b2BodyId bodyId, void* userData )
E:\a327ex\Anchor\engine\include\box2d\body.c:1402:void b2Body_SetMassData( b2BodyId bodyId, b2MassData massData )
E:\a327ex\Anchor\engine\include\box2d\body.c:1450:void b2Body_SetLinearDamping( b2BodyId bodyId, float linearDamping )
E:\a327ex\Anchor\engine\include\box2d\body.c:1473:void b2Body_SetAngularDamping( b2BodyId bodyId, float angularDamping )
E:\a327ex\Anchor\engine\include\box2d\body.c:1496:void b2Body_SetGravityScale( b2BodyId bodyId, float gravityScale )
E:\a327ex\Anchor\engine\include\box2d\body.c:1528:void b2Body_SetAwake( b2BodyId bodyId, bool awake )
E:\a327ex\Anchor\engine\include\box2d\body.c:1599:void b2Body_SetSleepThreshold( b2BodyId bodyId, float sleepThreshold )
... [4 more lines]

224:B2_API b2BodyType b2Body_GetType( b2BodyId bodyId );
234:B2_API const char* b2Body_GetName( b2BodyId bodyId );
240:B2_API void* b2Body_GetUserData( b2BodyId bodyId );
243:B2_API b2Vec2 b2Body_GetPosition( b2BodyId bodyId );
246:B2_API b2Rot b2Body_GetRotation( b2BodyId bodyId );
249:B2_API b2Transform b2Body_GetTransform( b2BodyId bodyId );
257:B2_API b2Vec2 b2Body_GetLocalPoint( b2BodyId bodyId, b2Vec2 worldPoint );
260:B2_API b2Vec2 b2Body_GetWorldPoint( b2BodyId bodyId, b2Vec2 localPoint );
263:B2_API b2Vec2 b2Body_GetLocalVector( b2BodyId bodyId, b2Vec2 worldVector );
266:B2_API b2Vec2 b2Body_GetWorldVector( b2BodyId bodyId, b2Vec2 localVector );
269:B2_API b2Vec2 b2Body_GetLinearVelocity( b2BodyId bodyId );
272:B2_API float b2Body_GetAngularVelocity( b2BodyId bodyId );
291:B2_API b2Vec2 b2Body_GetLocalPointVelocity( b2BodyId bodyId, b2Vec2 localPoint );
294:B2_API b2Vec2 b2Body_GetWorldPointVelocity( b2BodyId bodyId, b2Vec2 worldPoint );
356:B2_API float b2Body_GetMass( b2BodyId bodyId );
359:B2_API float b2Body_GetRotationalInertia( b2BodyId bodyId );
362:B2_API b2Vec2 b2Body_GetLocalCenterOfMass( b2BodyId bodyId );
365:B2_API b2Vec2 b2Body_GetWorldCenterOfMass( b2BodyId bodyId );
373:B2_API b2MassData b2Body_GetMassData( b2BodyId bodyId );
387:B2_API float b2Body_GetLinearDamping( b2BodyId bodyId );
393:B2_API float b2Body_GetAngularDamping( b2BodyId bodyId );
400:B2_API float b2Body_GetGravityScale( b2BodyId bodyId );
423:B2_API float b2Body_GetSleepThreshold( b2BodyId bodyId );
438:B2_API b2MotionLocks b2Body_GetMotionLocks( b2BodyId bodyId );
457:B2_API b2WorldId b2Body_GetWorld( b2BodyId bodyId );
460:B2_API int b2Body_GetShapeCount( b2BodyId bodyId );
464:B2_API int b2Body_GetShapes( b2BodyId bodyId, b2ShapeId* shapeArray, int capacity );
467:B2_API int b2Body_GetJointCount( b2BodyId bodyId );
471:B2_API int b2Body_GetJoints( b2BodyId bodyId, b2JointId* jointArray, int capacity );
474:B2_API int b2Body_GetContactCapacity( b2BodyId bodyId );
... [3 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

3215→    b2ShapeDef shape_def = b2DefaultShapeDef();
  3216→    setup_shape_def_from_tag(&shape_def, tag, is_sensor);
  3217→
  3218→    // Compute convex hull
  3219→    b2Hull hull = b2ComputeHull(points, vertex_count);
  3220→    if (hull.count == 0) {
  3221→        return luaL_error(L, "Failed to compute convex hull from vertices");
  3222→    }
  3223→
  3224→    // Create polygon from hull
  3225→    b2Polygon polygon = b2MakePolygon(&hull, 0.0f);
  3226→
  3227→    // Create shape
  3228→    b2ShapeId shape_id = b2CreatePolygonShape(*body_id, &shape_def, &polygon);
  3229→

3225→    b2Polygon polygon = b2MakePolygon(&hull, 0.0f);
  3226→
  3227→    // Create shape
  3228→    b2ShapeId shape_id = b2CreatePolygonShape(*body_id, &shape_def, &polygon);
  3229→
  3230→    // Return shape ID as userdata
  3231→    b2ShapeId* ud = (b2ShapeId*)lua_newuserdata(L, sizeof(b2ShapeId));
  3232→    *ud = shape_id;
  3233→    return 1;
  3234→}
  3235→
  3236→// Input Lua bindings
  3237→static int l_key_is_down(lua_State* L) {
  3238→    const char* key_name = luaL_checkstring(L, 1);
  3239→    SDL_Scancode scancode = key_name_to_scancode(key_name);
  3240→    if (scancode == SDL_SCANCODE_UNKNOWN) {
  3241→        lua_pushboolean(L, 0);
  3242→    } else {
  3243→        lua_pushboolean(L, keys_current[scancode]);
  3244→    }

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3226→
  3227→    // Create shape
  3228→    b2ShapeId shape_id = b2CreatePolygonShape(*body_id, &shape_def, &polygon);
  3229→
  3230→    // Return shape ID as userdata
  3231→    b2ShapeId* ud = (b2ShapeId*)lua_newuserdata(L, sizeof(b2ShapeId));
  3232→    *ud = shape_id;
  3233→    return 1;
  3234→}
  3235→
  3236→// Step 7: Body properties - Position/rotation setters
  3237→static int l_physics_set_position(lua_State* L) {
  3238→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  3239→    if (!body_id || !b2Body_IsValid(*body_id)) {
  3240→        return luaL_error(L, "Invalid body");
  3241→    }
  3242→    float x = (float)luaL_checknumber(L, 2) / pixels_per_meter;
  3243→    float y = (float)luaL_checknumber(L, 3) / pixels_per_meter;
  3244→    b2Rot rot = b2Body_GetRotation(*body_id);
  3245→    b2Body_SetTransform(*body_id, (b2Vec2){x, y}, rot);
  3246→    return 0;
  3247→}
  3248→
  3249→static int l_physics_set_angle(lua_State* L) {
  3250→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  3251→    if (!body_id || !b2Body_IsValid(*body_id)) {
  3252→        return luaL_error(L, "Invalid body");
  3253→    }
  3254→    float angle = (float)luaL_checknumber(L, 2);
... [261 more lines]

3885:    lua_register(L, "physics_add_polygon", l_physics_add_polygon);
3886-    // Input - Keyboard
3887-    lua_register(L, "key_is_down", l_key_is_down);
3888-    lua_register(L, "key_is_pressed", l_key_is_pressed);
3889-    lua_register(L, "key_is_released", l_key_is_released);
3890-    // Input - Mouse

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3881→    lua_register(L, "physics_body_is_valid", l_physics_body_is_valid);
  3882→    lua_register(L, "physics_add_circle", l_physics_add_circle);
  3883→    lua_register(L, "physics_add_box", l_physics_add_box);
  3884→    lua_register(L, "physics_add_capsule", l_physics_add_capsule);
  3885→    lua_register(L, "physics_add_polygon", l_physics_add_polygon);
  3886→    // Physics - Body properties
  3887→    lua_register(L, "physics_set_position", l_physics_set_position);
  3888→    lua_register(L, "physics_set_angle", l_physics_set_angle);
  3889→    lua_register(L, "physics_set_transform", l_physics_set_transform);
  3890→    lua_register(L, "physics_get_velocity", l_physics_get_velocity);
  3891→    lua_register(L, "physics_get_angular_velocity", l_physics_get_angular_velocity);
  3892→    lua_register(L, "physics_set_velocity", l_physics_set_velocity);
  3893→    lua_register(L, "physics_set_angular_velocity", l_physics_set_angular_velocity);
  3894→    lua_register(L, "physics_apply_force", l_physics_apply_force);
  3895→    lua_register(L, "physics_apply_force_at", l_physics_apply_force_at);
  3896→    lua_register(L, "physics_apply_impulse", l_physics_apply_impulse);
  3897→    lua_register(L, "physics_apply_impulse_at", l_physics_apply_impulse_at);
  3898→    lua_register(L, "physics_apply_torque", l_physics_apply_torque);
  3899→    lua_register(L, "physics_apply_angular_impulse", l_physics_apply_angular_impulse);
  3900→    lua_register(L, "physics_set_linear_damping", l_physics_set_linear_damping);
  3901→    lua_register(L, "physics_set_angular_damping", l_physics_set_angular_damping);
  3902→    lua_register(L, "physics_set_gravity_scale", l_physics_set_gravity_scale);
  3903→    lua_register(L, "physics_set_fixed_rotation", l_physics_set_fixed_rotation);
  3904→    lua_register(L, "physics_set_bullet", l_physics_set_bullet);
  3905→    lua_register(L, "physics_set_user_data", l_physics_set_user_data);
  3906→    lua_register(L, "physics_get_user_data", l_physics_get_user_data);
  3907→    // Physics - Shape properties
  3908→    lua_register(L, "physics_shape_set_friction", l_physics_shape_set_friction);
  3909→    lua_register(L, "physics_shape_get_friction", l_physics_shape_get_friction);
... [8 more lines]

The user doesn't want to proceed with this tool use. The tool use was rejected (eg. if it was a file edit, the new_string was NOT written to the file). To tell you how to proceed, the user said:
Any other properties that you think are important and that should be added?

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3497→    lua_pushnumber(L, restitution);
  3498→    return 1;
  3499→}
  3500→
  3501→static int l_physics_shape_is_valid(lua_State* L) {
  3502→    b2ShapeId* shape_id = (b2ShapeId*)lua_touserdata(L, 1);
  3503→    if (!shape_id) {
  3504→        lua_pushboolean(L, 0);
  3505→        return 1;
  3506→    }
  3507→    lua_pushboolean(L, b2Shape_IsValid(*shape_id));
  3508→    return 1;
  3509→}
  3510→
  3511→static int l_physics_shape_get_body(lua_State* L) {
  3512→    b2ShapeId* shape_id = (b2ShapeId*)lua_touserdata(L, 1);
  3513→    if (!shape_id || !b2Shape_IsValid(*shape_id)) {
  3514→        return luaL_error(L, "Invalid shape");
  3515→    }
  3516→    b2BodyId body_id = b2Shape_GetBody(*shape_id);
  3517→    b2BodyId* ud = (b2BodyId*)lua_newuserdata(L, sizeof(b2BodyId));
  3518→    *ud = body_id;
  3519→    return 1;
  3520→}
  3521→
  3522→static int l_physics_shape_set_density(lua_State* L) {
  3523→    b2ShapeId* shape_id = (b2ShapeId*)lua_touserdata(L, 1);
  3524→    if (!shape_id || !b2Shape_IsValid(*shape_id)) {
  3525→        return luaL_error(L, "Invalid shape");
... [67 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3983→    lua_register(L, "physics_get_user_data", l_physics_get_user_data);
  3984→    // Physics - Shape properties
  3985→    lua_register(L, "physics_shape_set_friction", l_physics_shape_set_friction);
  3986→    lua_register(L, "physics_shape_get_friction", l_physics_shape_get_friction);
  3987→    lua_register(L, "physics_shape_set_restitution", l_physics_shape_set_restitution);
  3988→    lua_register(L, "physics_shape_get_restitution", l_physics_shape_get_restitution);
  3989→    lua_register(L, "physics_shape_is_valid", l_physics_shape_is_valid);
  3990→    lua_register(L, "physics_shape_get_body", l_physics_shape_get_body);
  3991→    lua_register(L, "physics_shape_set_density", l_physics_shape_set_density);
  3992→    lua_register(L, "physics_shape_get_density", l_physics_shape_get_density);
  3993→    // Physics - Additional body queries
  3994→    lua_register(L, "physics_get_body_type", l_physics_get_body_type);
  3995→    lua_register(L, "physics_get_mass", l_physics_get_mass);
  3996→    lua_register(L, "physics_is_awake", l_physics_is_awake);
  3997→    lua_register(L, "physics_set_awake", l_physics_set_awake);
  3998→    // Input - Keyboard
  3999→    lua_register(L, "key_is_down", l_key_is_down);
  4000→    lua_register(L, "key_is_pressed", l_key_is_pressed);
  4001→    lua_register(L, "key_is_released", l_key_is_released);
  4002→    // Input - Mouse

Exit code 1
anchor.c
src/anchor.c(264): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(920): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(914): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1306): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1584): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1590): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1700): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1709): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1803): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1805): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2450): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(2806): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(3424): error C2039: 'lockRotation': is not a member of 'b2MotionLocks'
E:\a327ex\Anchor\engine\include\box2d\types.h(171): note: see declaration of 'b2MotionLocks'
gl.c
Generating Code...
Build failed!

171:typedef struct b2MotionLocks
172-{
173-    /// Prevent translation along the x-axis
174-    bool linearX;
175-
176-    /// Prevent translation along the y-axis
177-    bool linearY;
178-
179-    /// Prevent rotation around the z-axis
180-    bool angularZ;
181:} b2MotionLocks;
182-
183-/// A body definition holds all the data needed to construct a rigid body.
184-/// You can safely re-use body definitions. Shapes are added to a body after construction.
185-/// Body definitions are temporary objects used to bundle creation parameters.
186-/// Must be initialized using b2DefaultBodyDef().
187-/// @ingroup body
188-typedef struct b2BodyDef
189-{
190-    \ The body type: static, kinematic, or dynamic.
191-    b2BodyType type;
--
234:    b2MotionLocks motionLocks;
235-
236-    /// Set this flag to false if this body should never fall asleep.
237-    bool enableSleep;
238-
239-    /// Is this body initially awake or sleeping?
240-    bool isAwake;
241-
... [3 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3413→    b2Body_SetGravityScale(*body_id, scale);
  3414→    return 0;
  3415→}
  3416→
  3417→static int l_physics_set_fixed_rotation(lua_State* L) {
  3418→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  3419→    if (!body_id || !b2Body_IsValid(*body_id)) {
  3420→        return luaL_error(L, "Invalid body");
  3421→    }
  3422→    bool fixed = lua_toboolean(L, 2);
  3423→    b2MotionLocks locks = b2Body_GetMotionLocks(*body_id);
  3424→    locks.angularZ = fixed;
  3425→    b2Body_SetMotionLocks(*body_id, locks);
  3426→    return 0;
  3427→}
  3428→
  3429→static int l_physics_set_bullet(lua_State* L) {
  3430→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  3431→    if (!body_id || !b2Body_IsValid(*body_id)) {

anchor.c
src/anchor.c(264): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(920): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(914): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1306): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1584): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1590): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1700): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1709): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1803): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1805): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2450): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(2806): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

1047→**Step 7: Body properties**
  1048→- [x] Position/rotation getters:
  1049→  - `physics_get_position(body)` → x, y (pixels)
  1050→  - `physics_get_angle(body)` → radians
  1051→- [ ] Position/rotation setters:
  1052→  - `physics_set_position(body, x, y)`
  1053→  - `physics_set_angle(body, angle)`
  1054→  - `physics_set_transform(body, x, y, angle)`
  1055→- [ ] Velocity:
  1056→  - `physics_get_velocity(body)` → vx, vy (pixels/sec)
  1057→  - `physics_get_angular_velocity(body)` → rad/sec
  1058→  - `physics_set_velocity(body, vx, vy)`
  1059→  - `physics_set_angular_velocity(body, av)`
  1060→- [ ] Forces/impulses (all in pixel units, convert internally):
  1061→  - `physics_apply_force(body, fx, fy)`
  1062→  - `physics_apply_force_at(body, fx, fy, px, py)`
  1063→  - `physics_apply_impulse(body, ix, iy)`
  1064→  - `physics_apply_impulse_at(body, ix, iy, px, py)`
  1065→  - `physics_apply_torque(body, torque)`
  1066→  - `physics_apply_angular_impulse(body, impulse)`
  1067→- [ ] Properties:
  1068→  - `physics_set_linear_damping(body, damping)`
  1069→  - `physics_set_angular_damping(body, damping)`
  1070→  - `physics_set_gravity_scale(body, scale)`
  1071→  - `physics_set_fixed_rotation(body, bool)`
  1072→  - `physics_set_bullet(body, bool)` — enable CCD
  1073→- [ ] User data:
  1074→  - `physics_set_user_data(body, id)` — store integer ID
  1075→  - `physics_get_user_data(body)` → integer ID
  1076→
... [5 more lines]

The file E:\a327ex\Anchor\docs\ANCHOR_IMPLEMENTATION_PLAN.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1043→- [x] Options table: `{sensor = bool, offset_x = n, offset_y = n, angle = n}`
  1044→- [x] Set `b2ShapeDef` flags based on tag config: `enableContactEvents`, `enableSensorEvents`, `enableHitEvents`
  1045→- [x] Return `b2ShapeId` as userdata
  1046→
  1047→**Step 7: Body and shape properties**
  1048→- [x] Position/rotation getters:
  1049→  - `physics_get_position(body)` → x, y (pixels)
  1050→  - `physics_get_angle(body)` → radians
  1051→- [x] Position/rotation setters:
  1052→  - `physics_set_position(body, x, y)`
  1053→  - `physics_set_angle(body, angle)`
  1054→  - `physics_set_transform(body, x, y, angle)`
  1055→- [x] Velocity:
  1056→  - `physics_get_velocity(body)` → vx, vy (pixels/sec)
  1057→  - `physics_get_angular_velocity(body)` → rad/sec
  1058→  - `physics_set_velocity(body, vx, vy)`
  1059→  - `physics_set_angular_velocity(body, av)`
  1060→- [x] Forces/impulses (all in pixel units, convert internally):
  1061→  - `physics_apply_force(body, fx, fy)`
  1062→  - `physics_apply_force_at(body, fx, fy, px, py)`
  1063→  - `physics_apply_impulse(body, ix, iy)`
  1064→  - `physics_apply_impulse_at(body, ix, iy, px, py)`
  1065→  - `physics_apply_torque(body, torque)`
  1066→  - `physics_apply_angular_impulse(body, impulse)`
  1067→- [x] Body properties:
  1068→  - `physics_set_linear_damping(body, damping)`
  1069→  - `physics_set_angular_damping(body, damping)`
  1070→  - `physics_set_gravity_scale(body, scale)`
  1071→  - `physics_set_fixed_rotation(body, bool)`
... [22 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

1→print("main.lua loaded - Physics Test (Phase 7 - Step 6: Shape Creation)")
     2→
     3→set_shape_filter("rough")
     4→input_bind_all()
     5→
     6→local screen_w, screen_h = 480, 270
     7→
     8→-- Colors (twitter_emoji theme from super emoji box)
     9→local bg_color = rgba(231, 232, 233, 255)
    10→local green = rgba(122, 179, 87, 255)
    11→
    12→-- Layers (bottom to top: background, shadow, outline, game)
    13→local bg_layer = layer_create('background')
    14→local shadow_layer = layer_create('shadow')
    15→local outline_layer = layer_create('outline')
    16→local game_layer = layer_create('game')
    17→
    18→-- Shaders
    19→local shadow_shader = shader_load_file("shaders/shadow.frag")
    20→local outline_shader = shader_load_file("shaders/outline.frag")
    21→
    22→-- Textures
    23→local smile_tex = texture_load("assets/slight_smile.png")
    24→local smile_size = 20
    25→local smile_scale = smile_size / texture_get_width(smile_tex)
    26→
    27→-- Initialize physics
    28→physics_init()
    29→physics_set_gravity(0, 500)
    30→physics_set_meter_scale(64)
... [99 more lines]

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→print("main.lua loaded - Physics Test (Phase 7 - Step 7: Body Properties)")
     2→
     3→set_shape_filter("rough")
     4→input_bind_all()
     5→

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    59→physics_add_box(right_wall, 'ground', wall_width, wall_height)
    60→
    61→print("Created ground and walls")
    62→
    63→-- Table to track dynamic bodies and their shapes
    64→local dynamic_bodies = {}
    65→local dynamic_shapes = {}
    66→
    67→-- Helper to get a random ball
    68→local function get_random_ball()
    69→    if #dynamic_bodies == 0 then return nil end
    70→    return dynamic_bodies[math.random(1, #dynamic_bodies)]
    71→end
    72→
    73→local function draw_objects(layer)
    74→    -- Draw ground (plain rectangle)
    75→    local gx, gy = physics_get_position(ground_body)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    95→        end
    96→    end
    97→end
    98→
    99→function update(dt)
   100→    -- Create body on Space
   101→    if is_pressed('space') then
   102→        local x = math.random(50, screen_w - 50)
   103→        local y = 50
   104→        local body = physics_create_body('dynamic', x, y)
   105→        local shape = physics_add_circle(body, 'ball', smile_size / 2)
   106→        physics_shape_set_restitution(shape, 1.0)  -- Bouncy!
   107→        table.insert(dynamic_bodies, body)
   108→        table.insert(dynamic_shapes, shape)
   109→        print(string.format("Created bouncy ball at %.0f, %.0f", x, y))
   110→    end
   111→
   112→    -- Destroy oldest body on D
   113→    if is_pressed('d') and #dynamic_bodies > 0 then
   114→        local body = table.remove(dynamic_bodies, 1)
   115→        table.remove(dynamic_shapes, 1)
   116→        physics_destroy_body(body)
   117→        print(string.format("Destroyed body - Remaining: %d", #dynamic_bodies))
   118→    end
   119→
   120→    -- P: Random ball gets random high impulse
   121→    if is_pressed('p') then
   122→        local ball = get_random_ball()
   123→        if ball then
... [47 more lines]

E:\a327ex\Anchor\engine\src\anchor.c:3376:static int l_physics_apply_angular_impulse(lua_State* L) {
E:\a327ex\Anchor\engine\src\anchor.c-3377-    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
E:\a327ex\Anchor\engine\src\anchor.c-3378-    if (!body_id || !b2Body_IsValid(*body_id)) {
E:\a327ex\Anchor\engine\src\anchor.c-3379-        return luaL_error(L, "Invalid body");
E:\a327ex\Anchor\engine\src\anchor.c-3380-    }
E:\a327ex\Anchor\engine\src\anchor.c-3381-    float impulse = (float)luaL_checknumber(L, 2);
E:\a327ex\Anchor\engine\src\anchor.c-3382-    b2Body_ApplyAngularImpulse(*body_id, impulse, true);
E:\a327ex\Anchor\engine\src\anchor.c-3383-    return 0;
E:\a327ex\Anchor\engine\src\anchor.c-3384-}
E:\a327ex\Anchor\engine\src\anchor.c-3385-
E:\a327ex\Anchor\engine\src\anchor.c-3386-// Step 7: Body properties - Damping, gravity scale, fixed rotation, bullet
E:\a327ex\Anchor\engine\src\anchor.c-3387-static int l_physics_set_linear_damping(lua_State* L) {
E:\a327ex\Anchor\engine\src\anchor.c-3388-    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
E:\a327ex\Anchor\engine\src\anchor.c-3389-    if (!body_id || !b2Body_IsValid(*body_id)) {
E:\a327ex\Anchor\engine\src\anchor.c-3390-        return luaL_error(L, "Invalid body");
E:\a327ex\Anchor\engine\src\anchor.c-3391-    }
--
E:\a327ex\Anchor\engine\src\anchor.c:3976:    lua_register(L, "physics_apply_angular_impulse", l_physics_apply_angular_impulse);
E:\a327ex\Anchor\engine\src\anchor.c-3977-    lua_register(L, "physics_set_linear_damping", l_physics_set_linear_damping);
E:\a327ex\Anchor\engine\src\anchor.c-3978-    lua_register(L, "physics_set_angular_damping", l_physics_set_angular_damping);
E:\a327ex\Anchor\engine\src\anchor.c-3979-    lua_register(L, "physics_set_gravity_scale", l_physics_set_gravity_scale);
E:\a327ex\Anchor\engine\src\anchor.c-3980-    lua_register(L, "physics_set_fixed_rotation", l_physics_set_fixed_rotation);
E:\a327ex\Anchor\engine\src\anchor.c-3981-    lua_register(L, "physics_set_bullet", l_physics_set_bullet);
E:\a327ex\Anchor\engine\src\anchor.c-3982-    lua_register(L, "physics_set_user_data", l_physics_set_user_data);
E:\a327ex\Anchor\engine\src\anchor.c-3983-    lua_register(L, "physics_get_user_data", l_physics_get_user_data);
E:\a327ex\Anchor\engine\src\anchor.c-3984-    // Physics - Shape properties
E:\a327ex\Anchor\engine\src\anchor.c-3985-    lua_register(L, "physics_shape_set_friction", l_physics_shape_set_friction);
E:\a327ex\Anchor\engine\src\anchor.c-3986-    lua_register(L, "physics_shape_get_friction", l_physics_shape_get_friction);
E:\a327ex\Anchor\engine\src\anchor.c-3987-    lua_register(L, "physics_shape_set_restitution", l_physics_shape_set_restitution);
E:\a327ex\Anchor\engine\src\anchor.c-3988-    lua_register(L, "physics_shape_get_restitution", l_physics_shape_get_restitution);
... [3 more lines]

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   137→            print(string.format("Applied angular impulse %.1f to random ball", angular))
   138→        end
   139→    end
   140→
   141→    -- K held: Apply wind force (up and right) to all balls
   142→    if is_down('k') then
   143→        for _, body in ipairs(dynamic_bodies) do
   144→            if physics_body_is_valid(body) then
   145→                physics_apply_force(body, 60, -40)
   146→            end
   147→        end
   148→    end
   149→
   150→    -- G held: Lower gravity scale, released goes back to normal
   151→    if is_pressed('g') then
   152→        for _, body in ipairs(dynamic_bodies) do

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   127→            print(string.format("Applied impulse (%.0f, %.0f) to random ball", ix, iy))
   128→        end
   129→    end
   130→
   131→    -- L: Random ball gets random high angular impulse
   132→    if is_pressed('l') then
   133→        local ball = get_random_ball()
   134→        if ball then
   135→            local angular = (math.random() - 0.5) * 2.0  -- Range: -1.0 to 1.0
   136→            physics_apply_angular_impulse(ball, angular)
   137→            print(string.format("Applied angular impulse %.2f to random ball", angular))
   138→        end
   139→    end
   140→
   141→    -- K held: Apply wind force (up and right) to all balls
   142→    if is_down('k') then
   143→        for _, body in ipairs(dynamic_bodies) do

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   120→    -- P: Random ball gets random high impulse
   121→    if is_pressed('p') then
   122→        local ball = get_random_ball()
   123→        if ball then
   124→            local ix = math.random(-25, 25)
   125→            local iy = math.random(-40, -10)
   126→            physics_apply_impulse(ball, ix, iy)
   127→            print(string.format("Applied impulse (%.0f, %.0f) to random ball", ix, iy))
   128→        end
   129→    end

4553-        // Update holds (track how long actions have been held)
4554-        holds_update((float)PHYSICS_RATE);
4555-
4556-        // Step physics world
4557-        if (physics_initialized && physics_enabled) {
4558:            b2World_Step(physics_world, (float)PHYSICS_RATE, 4);  // 4 sub-steps recommended
4559-        }
4560-
4561-        // Call Lua update (skip if in error state)
4562-        if (!error_state) {
4563-            lua_pushcfunction(L, traceback);
4564-            int err_handler = lua_gettop(L);
4565-            lua_getglobal(L, "update");
4566-            if (lua_isfunction(L, -1)) {
4567-                lua_pushnumber(L, PHYSICS_RATE);
4568-                if (lua_pcall(L, 1, 0, err_handler) != LUA_OK) {

49-#define INITIAL_SCALE 3
50-
51-// Timing configuration
52:#define PHYSICS_RATE (1.0 / 120.0)  // 120 Hz physics/input timestep
53-#define RENDER_RATE  (1.0 / 60.0)   // 60 Hz render cap (for chunky pixel movement)
54:#define MAX_UPDATES 10              // Cap on fixed steps per frame (prevents spiral of death)
55-
56-// VSync snapping - snap delta times within 0.2ms of common refresh rates
57:// This prevents accumulator drift from timer jitter
58-#define VSYNC_SNAP_TOLERANCE 0.0002
59-
60-// Forward declaration for timing resync (defined with main loop state)
--
4048-static double snap_frequencies[8];
4049-static int snap_frequency_count = 0;
4050-
4051:// Reset timing accumulators (call on focus gain, scene transitions, etc.)
4052-// This prevents accumulated lag from causing catch-up updates
4053-static void timing_resync(void) {
4054-    physics_lag = 0.0;
--
4391-    sound_cleanup_finished();
4392-
4393-    // Clamp delta time to handle anomalies (pauses, debugger, sleep resume)
4394:    if (dt > PHYSICS_RATE * MAX_UPDATES) {
4395:        dt = PHYSICS_RATE;
4396-    }
4397-    if (dt < 0) {
4398-        dt = 0;
4399-    }
... [60 more lines]

2162-
2163-// Process a rectangle command (SDF-based, UV-space approach)
2164-// The SDF is computed in local quad space using UV coordinates.
2165:// This handles rotation correctly because UV interpolation implicitly
2166-// provides the inverse rotation.
2167-static void process_rectangle(const DrawCommand* cmd) {
2168-    float x = cmd->params[0];
2169-    float y = cmd->params[1];
2170-    float w = cmd->params[2];
2171-    float h = cmd->params[3];
2172-
2173-    // Add padding for anti-aliasing (1-2 pixels)
2174-    float pad = 2.0f;
2175-
--
4039-static Uint64 perf_freq = 0;
4040-static Uint64 last_time = 0;
4041-static double physics_lag = 0.0;
4042:static double render_lag = 0.0;
4043-static Uint64 step = 0;
4044-static double game_time = 0.0;
4045-static Uint64 frame = 0;
4046-
4047-// VSync snap frequencies (computed at init based on display refresh rate)
4048-static double snap_frequencies[8];
4049-static int snap_frequency_count = 0;
4050-
4051-// Reset timing accumulators (call on focus gain, scene transitions, etc.)
4052-// This prevents accumulated lag from causing catch-up updates
4053-static void timing_resync(void) {
... [60 more lines]

<tool_use_error>File has not been read yet. Read it first before writing to it.</tool_use_error>

1→/*
     2→ * Anchor Engine
     3→ * Phase 1: Window + OpenGL + Lua integration
     4→ * Phase 2: Web build (Emscripten/WebGL)
     5→ * Phase 3: Rendering (layers, shapes, sprites, transforms, blend modes)
     6→ */
     7→
     8→#include <stdio.h>
     9→#include <stdlib.h>
    10→#include <stdbool.h>
    11→#include <string.h>
    12→#include <math.h>
    13→
    14→#ifdef _WIN32
    15→#include <direct.h>  // _chdir
    16→#else
    17→#include <unistd.h>  // chdir
    18→#endif
    19→
    20→#include <SDL.h>
    21→
    22→#ifdef __EMSCRIPTEN__
    23→    #include <emscripten.h>
    24→    #include <emscripten/html5.h>
    25→    #include <GLES3/gl3.h>
    26→#else
    27→    #include <glad/gl.h>
    28→#endif
    29→
    30→#include <lua.h>
... [70 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    48→#define GAME_HEIGHT 270
    49→#define INITIAL_SCALE 3
    50→
    51→// Timing configuration
    52→#define PHYSICS_RATE (1.0 / 60.0)   // 60 Hz physics/input timestep
    53→#define RENDER_RATE  (1.0 / 60.0)   // 60 Hz render cap (for chunky pixel movement)
    54→#define MAX_UPDATES 10              // Cap on fixed steps per frame (prevents spiral of death)
    55→
    56→// VSync snapping - snap delta times within 0.2ms of common refresh rates

E:\a327ex\Anchor\reference\anchor-loop-analysis.md
E:\a327ex\Anchor\reference\fixed-timestep-details.md
E:\a327ex\Anchor\reference\shader-setup-explained.md
E:\a327ex\Anchor\reference\strudel-chiptune-guide.md
E:\a327ex\Anchor\reference\pixel-perfect-research.md
E:\a327ex\Anchor\reference\frame-timing-analysis.md
E:\a327ex\Anchor\reference\anchor-project-review.md
E:\a327ex\Anchor\reference\phase-review-findings.md
E:\a327ex\Anchor\reference\phase-4-effects-analysis.md
E:\a327ex\Anchor\reference\input-system-research.md
E:\a327ex\Anchor\reference\box2d-3-api-proposal.md

1→# Fixed Timestep Details
     2→
     3→## Point 2: Events Drain on First Step
     4→
     5→### The Setup
     6→
     7→- Display: 60 Hz (16.67ms per frame)
     8→- Fixed timestep: 144 Hz (6.94ms per step)
     9→- Result: ~2-3 fixed steps per frame
    10→
    11→### Example Timeline
    12→
    13→```
    14→Frame N begins
    15→├── dt = 16.67ms (time since last frame)
    16→├── lag = 0 + 16.67 = 16.67ms
    17→│
    18→├── Fixed Step 1 (lag = 16.67ms, >= 6.94ms ✓)
    19→│   ├── SDL_PollEvent() → processes ALL queued events
    20→│   │   └── User pressed SPACE → input_state[SPACE] = true
    21→│   ├── (Lua update would run here)
    22→│   ├── lag = 16.67 - 6.94 = 9.73ms
    23→│
    24→├── Fixed Step 2 (lag = 9.73ms, >= 6.94ms ✓)
    25→│   ├── SDL_PollEvent() → queue is EMPTY (already drained)
    26→│   │   └── No events to process
    27→│   ├── (Lua update runs with same input state)
    28→│   ├── lag = 9.73 - 6.94 = 2.79ms
    29→│
    30→├── Fixed Step 3? (lag = 2.79ms, >= 6.94ms ✗)
... [101 more lines]

E:\a327ex\Anchor\tools\monitor_sim.c
E:\a327ex\Anchor\tools\monitor_sim.obj
E:\a327ex\Anchor\tools\monitor_sim.exe

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    48→#define GAME_HEIGHT 270
    49→#define INITIAL_SCALE 3
    50→
    51→// Timing configuration
    52→#define PHYSICS_RATE (1.0 / 120.0)  // 120 Hz physics/input timestep
    53→#define RENDER_RATE  (1.0 / 60.0)   // 60 Hz render cap (for chunky pixel movement)
    54→#define MAX_UPDATES 10              // Cap on fixed steps per frame (prevents spiral of death)
    55→
    56→// VSync snapping - snap delta times within 0.2ms of common refresh rates

No matches found

54-#define MAX_UPDATES 10              // Cap on fixed steps per frame (prevents spiral of death)
55-
56:// VSync snapping - snap delta times within 0.2ms of common refresh rates
57-// This prevents accumulator drift from timer jitter
58-#define VSYNC_SNAP_TOLERANCE 0.0002
59-
60-// Forward declaration for timing resync (defined with main loop state)
61-static void timing_resync(void);
--
838-static int mouse_x = 0, mouse_y = 0;           // Window coordinates
839-static int mouse_dx = 0, mouse_dy = 0;         // Delta this frame
840:static int mouse_wheel_x = 0, mouse_wheel_y = 0; // Wheel delta this frame
841-
842-// Input state - Gamepad
843-static SDL_GameController* gamepad = NULL;
844-static bool gamepad_buttons_current[SDL_CONTROLLER_BUTTON_MAX] = {0};
845-static bool gamepad_buttons_previous[SDL_CONTROLLER_BUTTON_MAX] = {0};
--
1135-    memcpy(gamepad_buttons_previous, gamepad_buttons_current, sizeof(gamepad_buttons_previous));
1136-    memcpy(gamepad_axes_previous, gamepad_axes, sizeof(gamepad_axes_previous));
1137:    // Reset per-frame deltas
1138-    mouse_dx = 0;
1139-    mouse_dy = 0;
1140-    mouse_wheel_x = 0;
1141-    mouse_wheel_y = 0;
1142-}
--
3629-}
3630-
3631:static int l_mouse_delta(lua_State* L) {
... [76 more lines]

4035→}
  4036→
  4037→// Main loop state (needed for emscripten)
  4038→static bool running = true;
  4039→static Uint64 perf_freq = 0;
  4040→static Uint64 last_time = 0;
  4041→static double physics_lag = 0.0;
  4042→static double render_lag = 0.0;
  4043→static Uint64 step = 0;
  4044→static double game_time = 0.0;
  4045→static Uint64 frame = 0;
  4046→
  4047→// VSync snap frequencies (computed at init based on display refresh rate)
  4048→static double snap_frequencies[8];
  4049→static int snap_frequency_count = 0;
  4050→
  4051→// Reset timing accumulators (call on focus gain, scene transitions, etc.)
  4052→// This prevents accumulated lag from causing catch-up updates
  4053→static void timing_resync(void) {
  4054→    physics_lag = 0.0;
  4055→    render_lag = 0.0;
  4056→    last_time = SDL_GetPerformanceCounter();
  4057→}
  4058→
  4059→// Shader headers - prepended to all shaders based on platform
  4060→#ifdef __EMSCRIPTEN__
  4061→    #define SHADER_HEADER_VERT "#version 300 es\n"
  4062→    #define SHADER_HEADER_FRAG "#version 300 es\nprecision mediump float;\n"
  4063→#else
  4064→    #define SHADER_HEADER_VERT "#version 330 core\n"
... [20 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  4043→static Uint64 step = 0;
  4044→static double game_time = 0.0;
  4045→static Uint64 frame = 0;
  4046→
  4047→// VSync snap frequencies (computed at init based on display refresh rate)
  4048→static double snap_frequencies[8];
  4049→static int snap_frequency_count = 0;
  4050→
  4051→// Delta time averaging (smooths out OS scheduling jitter)
  4052→#define DT_HISTORY_COUNT 4
  4053→static double dt_history[DT_HISTORY_COUNT] = {0};
  4054→static int dt_history_index = 0;
  4055→static bool dt_history_filled = false;
  4056→
  4057→// Reset timing accumulators (call on focus gain, scene transitions, etc.)
  4058→// This prevents accumulated lag from causing catch-up updates
  4059→static void timing_resync(void) {
  4060→    physics_lag = 0.0;
  4061→    render_lag = 0.0;

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  4053→static double dt_history[DT_HISTORY_COUNT] = {0};
  4054→static int dt_history_index = 0;
  4055→static bool dt_history_filled = false;
  4056→
  4057→// Reset timing accumulators (call on focus gain, scene transitions, etc.)
  4058→// This prevents accumulated lag from causing catch-up updates
  4059→static void timing_resync(void) {
  4060→    physics_lag = 0.0;
  4061→    render_lag = 0.0;
  4062→    last_time = SDL_GetPerformanceCounter();
  4063→    // Reset dt averaging
  4064→    for (int i = 0; i < DT_HISTORY_COUNT; i++) dt_history[i] = 0;
  4065→    dt_history_index = 0;
  4066→    dt_history_filled = false;
  4067→}
  4068→
  4069→// Shader headers - prepended to all shaders based on platform
  4070→#ifdef __EMSCRIPTEN__
  4071→    #define SHADER_HEADER_VERT "#version 300 es\n"

4395→static void main_loop_iteration(void) {
  4396→    Uint64 current_time = SDL_GetPerformanceCounter();
  4397→    double dt = (double)(current_time - last_time) / (double)perf_freq;
  4398→    last_time = current_time;
  4399→
  4400→    // Clean up finished sounds (must be done from main thread)
  4401→    sound_cleanup_finished();
  4402→
  4403→    // Clamp delta time to handle anomalies (pauses, debugger, sleep resume)
  4404→    if (dt > PHYSICS_RATE * MAX_UPDATES) {
  4405→        dt = PHYSICS_RATE;
  4406→    }
  4407→    if (dt < 0) {
  4408→        dt = 0;
  4409→    }
  4410→
  4411→    // VSync snapping: if dt is close to a known refresh rate, snap to it exactly
  4412→    // This prevents accumulator drift from timer jitter
  4413→    for (int i = 0; i < snap_frequency_count; i++) {
  4414→        double diff = dt - snap_frequencies[i];
  4415→        if (diff < 0) diff = -diff;
  4416→        if (diff < VSYNC_SNAP_TOLERANCE) {
  4417→            dt = snap_frequencies[i];
  4418→            break;
  4419→        }
  4420→    }
  4421→
  4422→    // Accumulate physics lag, capped to prevent spiral of death
  4423→    physics_lag += dt;
  4424→    if (physics_lag > PHYSICS_RATE * MAX_UPDATES) {
... [10 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  4407→    if (dt < 0) {
  4408→        dt = 0;
  4409→    }
  4410→
  4411→    // VSync snapping: if dt is close to a known refresh rate, snap to it exactly
  4412→    // This prevents accumulator drift from timer jitter
  4413→    for (int i = 0; i < snap_frequency_count; i++) {
  4414→        double diff = dt - snap_frequencies[i];
  4415→        if (diff < 0) diff = -diff;
  4416→        if (diff < VSYNC_SNAP_TOLERANCE) {
  4417→            dt = snap_frequencies[i];
  4418→            break;
  4419→        }
  4420→    }
  4421→
  4422→    // Delta time averaging: smooth out OS scheduling jitter
  4423→    // A single slow frame gets spread across multiple frames instead of spiking
  4424→    dt_history[dt_history_index] = dt;
  4425→    dt_history_index = (dt_history_index + 1) % DT_HISTORY_COUNT;
  4426→    if (dt_history_index == 0) dt_history_filled = true;
  4427→
  4428→    double averaged_dt;
  4429→    if (dt_history_filled) {
  4430→        // Full buffer: average all values
  4431→        averaged_dt = 0;
  4432→        for (int i = 0; i < DT_HISTORY_COUNT; i++) {
  4433→            averaged_dt += dt_history[i];
  4434→        }
  4435→        averaged_dt /= DT_HISTORY_COUNT;
... [16 more lines]

anchor.c
src/anchor.c(264): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(920): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(914): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1306): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1584): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1590): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1700): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1709): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1803): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1805): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2450): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(2806): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

1→# Anchor Implementation Plan
     2→
     3→C engine with YueScript scripting, OpenGL rendering, targeting Windows and Web.
     4→
     5→---
     6→
     7→## Summary of Key Decisions
     8→
     9→| Area | Decision | Rationale |
    10→|------|----------|-----------|
    11→| Renderer | OpenGL | Smooth rotation, additive blending, performance headroom, console-portable |
    12→| Audio | miniaudio + stb_vorbis | Single-header, pitch shifting, OGG support |
    13→| Physics | Box2D 3.1 | Already used, true ball-to-ball collisions needed |
    14→| Scripting | Lua 5.4 + YueScript | Build-time compilation with `-r` flag for line numbers |
    15→| Timestep | Fixed 120Hz physics, 60Hz render | Decoupled for pixel-perfect visuals with responsive input |
    16→| Resolution | Per-game configurable | 480×270, 640×360, or custom; aspect-ratio scaling with letterboxing |
    17→| C Structure | Single anchor.c | Monolithic file, easier navigation |
    18→| Resources | Live forever | Games are small enough; no unloading needed |
    19→| Linking | Static | No DLLs; SDL2, Lua, audio all compiled in |
    20→| Distribution | Single executable | Zip-append for game content, extractable by modders |
    21→
    22→---
    23→
    24→## Build Strategy
    25→
    26→### YueScript Compilation
    27→
    28→**Build-time compilation** — compile `.yue` → `.lua` during build, not at runtime.
    29→
    30→```
... [120 more lines]

279-- [x] Matching LÖVE comparison test created
280-
281:**Step 8: Blend modes** ✓
282-- [x] `layer_set_blend_mode(layer, mode)` — 'alpha' or 'additive'
283-- [x] Blend mode stored per-command (via layer's current_blend)
284-- [x] Batch flush on blend mode change
285-- [x] Apply blend state before drawing batch
286-- [x] `apply_blend_mode()` helper function for GL state management
287-- [x] Verified on Windows and Web
288-
289-**Step 9: Multiple layers + composition** ✓
290-- [x] Layer registry (max 16 layers, stored with names for lookup)
291-- [x] `layer_create(name)` creates/retrieves named layer (idempotent)
292-- [x] Layer ordering for composition (creation order: first = bottom, last = top)
293-- [x] Composite all layers to screen at frame end (each layer rendered to FBO, then blitted with alpha)
294-
295-**Step 10: Frame timing improvements** ✓
296-- [x] Analysis against Tyler Glaiel's "How to make your game run at 60fps" article
--
335-- [x] Transform stack works (rotation, scale, nesting) (Step 6)
336-- [x] Sprites load and render (Step 7)
337:- [x] Blend modes work (alpha, additive) (Step 8)
338-- [x] Multiple layers composite correctly (Step 9)
339-- [x] Frame timing produces consistent updates across monitor refresh rates (Step 10)
340-- [x] Steps 1-10 verified on Windows and Web
341-
342-**Deliverable:** Working layer system with deferred rendering, basic shapes (circle, rectangle), sprites, transforms, blend modes, and rock-solid frame timing. ✓ Complete
343-
344----
345-
... [149 more lines]

E:\a327ex\Anchor\engine\include\box2d\box2d.h-46-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-47-/// Get sensor events for the current time step. The event data is transient. Do not store a reference to this data.
E:\a327ex\Anchor\engine\include\box2d\box2d.h:48:B2_API b2SensorEvents b2World_GetSensorEvents( b2WorldId worldId );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-49-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-50-/// Get contact events for this current time step. The event data is transient. Do not store a reference to this data.
E:\a327ex\Anchor\engine\include\box2d\box2d.h:51:B2_API b2ContactEvents b2World_GetContactEvents( b2WorldId worldId );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-52-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-53-/// Get the joint events for the current time step. The event data is transient. Do not store a reference to this data.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-54-B2_API b2JointEvents b2World_GetJointEvents( b2WorldId worldId );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-55-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-56-/// Overlap test for all shapes that *potentially* overlap the provided AABB
E:\a327ex\Anchor\engine\include\box2d\box2d.h-57-B2_API b2TreeStats b2World_OverlapAABB( b2WorldId worldId, b2AABB aabb, b2QueryFilter filter, b2OverlapResultFcn* fcn,
E:\a327ex\Anchor\engine\include\box2d\box2d.h-58-                                       void* context );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-59-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-60-/// Overlap test for all shapes that overlap the provided shape proxy.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-61-B2_API b2TreeStats b2World_OverlapShape( b2WorldId worldId, const b2ShapeProxy* proxy, b2QueryFilter filter,
--
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1231-}
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1232-
E:\a327ex\Anchor\engine\include\box2d\physics_world.c:1233:b2SensorEvents b2World_GetSensorEvents( b2WorldId worldId )
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1234-{
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1235- b2World* world = b2GetWorldFromId( worldId );
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1236- B2_ASSERT( world->locked == false );
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1237- if ( world->locked )
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1238- {
E:\a327ex\Anchor\engine\include\box2d\physics_world.c:1239:     return (b2SensorEvents){ 0 };
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1240- }
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1241-
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1242- // Careful to use previous buffer
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1243- int endEventArrayIndex = 1 - world->endEventArrayIndex;
... [95 more lines]

927-
928-/// A begin touch event is generated when a shape starts to overlap a sensor shape.
929:typedef struct b2SensorBeginTouchEvent
930-{
931-    /// The id of the sensor shape
932-    b2ShapeId sensorShapeId;
933-
934-    /// The id of the shape that began touching the sensor shape
935-    b2ShapeId visitorShapeId;
936:} b2SensorBeginTouchEvent;
937-
938-/// An end touch event is generated when a shape stops overlapping a sensor shape.
939-/// These include things like setting the transform, destroying a body or shape, or changing
940-/// a filter. You will also get an end event if the sensor or visitor are destroyed.
941-/// Therefore you should always confirm the shape id is valid using b2Shape_IsValid.
942:typedef struct b2SensorEndTouchEvent
943-{
944-    /// The id of the sensor shape
945-    /// @warning this shape may have been destroyed
946-    /// @see b2Shape_IsValid
947-    b2ShapeId sensorShapeId;
948-
949-    /// The id of the shape that stopped touching the sensor shape
950-    /// @warning this shape may have been destroyed
951-    /// @see b2Shape_IsValid
952-    b2ShapeId visitorShapeId;
953-
954:} b2SensorEndTouchEvent;
955-
956-/// Sensor events are buffered in the world and are available
... [110 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

162-// Physics globals
163-static b2WorldId physics_world = {0};
164:static bool physics_initialized = false;
165-static bool physics_enabled = true;
166-static float pixels_per_meter = 64.0f;  \ Default: 64 pixels = 1 meter
167-
168-// Physics tag system
169:#define MAX_PHYSICS_TAGS 64
170-#define MAX_TAG_NAME 32
171-
172-typedef struct {
173-    char name[MAX_TAG_NAME];
174-    uint64_t category_bit;    // Single bit identifying this tag (1, 2, 4, 8, ...)
--
178-} PhysicsTag;
179-
180:static PhysicsTag physics_tags[MAX_PHYSICS_TAGS];
181-static int physics_tag_count = 0;
182-
183-// Find tag index by name, returns -1 if not found
184-static int physics_tag_find(const char* name) {
185-    for (int i = 0; i < physics_tag_count; i++) {
--
2748-// Physics Lua bindings
2749-static int l_physics_init(lua_State* L) {
2750:    if (physics_initialized) {
2751-        return 0;  // Already initialized
2752-    }
2753-
2754-    b2WorldDef world_def = b2DefaultWorldDef();
... [99 more lines]

160→#endif
   161→
   162→// Physics globals
   163→static b2WorldId physics_world = {0};
   164→static bool physics_initialized = false;
   165→static bool physics_enabled = true;
   166→static float pixels_per_meter = 64.0f;  // Default: 64 pixels = 1 meter
   167→
   168→// Physics tag system
   169→#define MAX_PHYSICS_TAGS 64
   170→#define MAX_TAG_NAME 32
   171→
   172→typedef struct {
   173→    char name[MAX_TAG_NAME];
   174→    uint64_t category_bit;    // Single bit identifying this tag (1, 2, 4, 8, ...)
   175→    uint64_t collision_mask;  // Which tags this collides with (physical response)
   176→    uint64_t sensor_mask;     // Which tags trigger sensor events
   177→    uint64_t hit_mask;        // Which tags trigger hit events
   178→} PhysicsTag;
   179→
   180→static PhysicsTag physics_tags[MAX_PHYSICS_TAGS];
   181→static int physics_tag_count = 0;
   182→
   183→// Find tag index by name, returns -1 if not found
   184→static int physics_tag_find(const char* name) {
   185→    for (int i = 0; i < physics_tag_count; i++) {
   186→        if (strcmp(physics_tags[i].name, name) == 0) {
   187→            return i;
   188→        }
   189→    }
... [20 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   195→    if (index < 0 || index >= physics_tag_count) return NULL;
   196→    return &physics_tags[index];
   197→}
   198→
   199→// Get tag by name (NULL if not found)
   200→static PhysicsTag* physics_tag_get_by_name(const char* name) {
   201→    int index = physics_tag_find(name);
   202→    if (index < 0) return NULL;
   203→    return &physics_tags[index];
   204→}
   205→
   206→// Physics event buffers
   207→#define MAX_PHYSICS_EVENTS 256
   208→
   209→// Contact begin event (two shapes started touching)
   210→typedef struct {
   211→    b2BodyId body_a;
   212→    b2BodyId body_b;
   213→    b2ShapeId shape_a;
   214→    b2ShapeId shape_b;
   215→    int tag_a;  // Tag index of shape_a
   216→    int tag_b;  // Tag index of shape_b
   217→} PhysicsContactBeginEvent;
   218→
   219→// Contact end event (two shapes stopped touching)
   220→typedef struct {
   221→    b2BodyId body_a;
   222→    b2BodyId body_b;
   223→    b2ShapeId shape_a;
... [78 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

3090→    def->enableSensorEvents = (tag->sensor_mask != 0);
  3091→    def->enableContactEvents = (tag->collision_mask != 0);
  3092→    def->enableHitEvents = (tag->hit_mask != 0);
  3093→}
  3094→
  3095→// physics_add_circle(body, tag, radius, [opts])
  3096→static int l_physics_add_circle(lua_State* L) {
  3097→    if (!physics_initialized) {
  3098→        return luaL_error(L, "Physics not initialized");
  3099→    }
  3100→
  3101→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  3102→    if (!body_id) return luaL_error(L, "Invalid body");
  3103→
  3104→    const char* tag_name = luaL_checkstring(L, 2);
  3105→    PhysicsTag* tag = physics_tag_get_by_name(tag_name);
  3106→    if (!tag) return luaL_error(L, "Unknown physics tag: %s", tag_name);
  3107→
  3108→    float radius = (float)luaL_checknumber(L, 3);
  3109→
  3110→    // Parse options table (4th argument, optional)
  3111→    bool is_sensor = false;
  3112→    float offset_x = 0, offset_y = 0;
  3113→    if (lua_istable(L, 4)) {
  3114→        lua_getfield(L, 4, "sensor");
  3115→        if (!lua_isnil(L, -1)) is_sensor = lua_toboolean(L, -1);
  3116→        lua_pop(L, 1);
  3117→
  3118→        lua_getfield(L, 4, "offset_x");
  3119→        if (!lua_isnil(L, -1)) offset_x = (float)lua_tonumber(L, -1);
... [40 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3133→        .center = { offset_x / pixels_per_meter, offset_y / pixels_per_meter },
  3134→        .radius = radius / pixels_per_meter
  3135→    };
  3136→
  3137→    // Create shape
  3138→    b2ShapeId shape_id = b2CreateCircleShape(*body_id, &shape_def, &circle);
  3139→
  3140→    // Store tag index in shape's user data for event lookup
  3141→    int tag_index = (int)(tag - physics_tags);
  3142→    b2Shape_SetUserData(shape_id, (void*)(uintptr_t)tag_index);
  3143→
  3144→    // Return shape ID as userdata
  3145→    b2ShapeId* ud = (b2ShapeId*)lua_newuserdata(L, sizeof(b2ShapeId));
  3146→    *ud = shape_id;
  3147→    return 1;
  3148→}
  3149→
  3150→// physics_add_box(body, tag, width, height, [opts])
  3151→static int l_physics_add_box(lua_State* L) {
  3152→    if (!physics_initialized) {
  3153→        return luaL_error(L, "Physics not initialized");
  3154→    }

3185→        lua_pop(L, 1);
  3186→    }
  3187→
  3188→    // Create shape def
  3189→    b2ShapeDef shape_def = b2DefaultShapeDef();
  3190→    setup_shape_def_from_tag(&shape_def, tag, is_sensor);
  3191→
  3192→    // Create box polygon (convert to meters)
  3193→    float half_w = (width / 2.0f) / pixels_per_meter;
  3194→    float half_h = (height / 2.0f) / pixels_per_meter;
  3195→    b2Vec2 center = { offset_x / pixels_per_meter, offset_y / pixels_per_meter };
  3196→    b2Rot rotation = b2MakeRot(angle);
  3197→    b2Polygon box = b2MakeOffsetBox(half_w, half_h, center, rotation);
  3198→
  3199→    // Create shape
  3200→    b2ShapeId shape_id = b2CreatePolygonShape(*body_id, &shape_def, &box);
  3201→
  3202→    // Return shape ID as userdata
  3203→    b2ShapeId* ud = (b2ShapeId*)lua_newuserdata(L, sizeof(b2ShapeId));
  3204→    *ud = shape_id;
  3205→    return 1;
  3206→}
  3207→
  3208→// physics_add_capsule(body, tag, length, radius, [opts])
  3209→static int l_physics_add_capsule(lua_State* L) {
  3210→    if (!physics_initialized) {
  3211→        return luaL_error(L, "Physics not initialized");
  3212→    }
  3213→
  3214→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3195→    b2Vec2 center = { offset_x / pixels_per_meter, offset_y / pixels_per_meter };
  3196→    b2Rot rotation = b2MakeRot(angle);
  3197→    b2Polygon box = b2MakeOffsetBox(half_w, half_h, center, rotation);
  3198→
  3199→    // Create shape
  3200→    b2ShapeId shape_id = b2CreatePolygonShape(*body_id, &shape_def, &box);
  3201→
  3202→    // Store tag index in shape's user data for event lookup
  3203→    int tag_index = (int)(tag - physics_tags);
  3204→    b2Shape_SetUserData(shape_id, (void*)(uintptr_t)tag_index);
  3205→
  3206→    // Return shape ID as userdata
  3207→    b2ShapeId* ud = (b2ShapeId*)lua_newuserdata(L, sizeof(b2ShapeId));
  3208→    *ud = shape_id;
  3209→    return 1;
  3210→}
  3211→
  3212→// physics_add_capsule(body, tag, length, radius, [opts])
  3213→static int l_physics_add_capsule(lua_State* L) {
  3214→    if (!physics_initialized) {
  3215→        return luaL_error(L, "Physics not initialized");
  3216→    }

3250→    float half_len = (length / 2.0f) / pixels_per_meter;
  3251→    float rad = radius / pixels_per_meter;
  3252→    float ox = offset_x / pixels_per_meter;
  3253→    float oy = offset_y / pixels_per_meter;
  3254→
  3255→    b2Capsule capsule = {
  3256→        .center1 = { ox, oy - half_len },
  3257→        .center2 = { ox, oy + half_len },
  3258→        .radius = rad
  3259→    };
  3260→
  3261→    // Create shape
  3262→    b2ShapeId shape_id = b2CreateCapsuleShape(*body_id, &shape_def, &capsule);
  3263→
  3264→    // Return shape ID as userdata
  3265→    b2ShapeId* ud = (b2ShapeId*)lua_newuserdata(L, sizeof(b2ShapeId));
  3266→    *ud = shape_id;
  3267→    return 1;
  3268→}
  3269→
  3270→// physics_add_polygon(body, tag, vertices, [opts])
  3271→// vertices is a flat array: {x1, y1, x2, y2, ...}
  3272→static int l_physics_add_polygon(lua_State* L) {
  3273→    if (!physics_initialized) {
  3274→        return luaL_error(L, "Physics not initialized");
  3275→    }
  3276→
  3277→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  3278→    if (!body_id) return luaL_error(L, "Invalid body");
  3279→
... [10 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3257→        .center2 = { ox, oy + half_len },
  3258→        .radius = rad
  3259→    };
  3260→
  3261→    // Create shape
  3262→    b2ShapeId shape_id = b2CreateCapsuleShape(*body_id, &shape_def, &capsule);
  3263→
  3264→    // Store tag index in shape's user data for event lookup
  3265→    int tag_index = (int)(tag - physics_tags);
  3266→    b2Shape_SetUserData(shape_id, (void*)(uintptr_t)tag_index);
  3267→
  3268→    // Return shape ID as userdata
  3269→    b2ShapeId* ud = (b2ShapeId*)lua_newuserdata(L, sizeof(b2ShapeId));
  3270→    *ud = shape_id;
  3271→    return 1;
  3272→}
  3273→
  3274→// physics_add_polygon(body, tag, vertices, [opts])
  3275→// vertices is a flat array: {x1, y1, x2, y2, ...}
  3276→static int l_physics_add_polygon(lua_State* L) {
  3277→    if (!physics_initialized) {
  3278→        return luaL_error(L, "Physics not initialized");

3310→    bool is_sensor = false;
  3311→    if (lua_istable(L, 4)) {
  3312→        lua_getfield(L, 4, "sensor");
  3313→        if (!lua_isnil(L, -1)) is_sensor = lua_toboolean(L, -1);
  3314→        lua_pop(L, 1);
  3315→    }
  3316→
  3317→    // Create shape def
  3318→    b2ShapeDef shape_def = b2DefaultShapeDef();
  3319→    setup_shape_def_from_tag(&shape_def, tag, is_sensor);
  3320→
  3321→    // Compute convex hull
  3322→    b2Hull hull = b2ComputeHull(points, vertex_count);
  3323→    if (hull.count == 0) {
  3324→        return luaL_error(L, "Failed to compute convex hull from vertices");
  3325→    }
  3326→
  3327→    // Create polygon from hull
  3328→    b2Polygon polygon = b2MakePolygon(&hull, 0.0f);
  3329→
  3330→    // Create shape
  3331→    b2ShapeId shape_id = b2CreatePolygonShape(*body_id, &shape_def, &polygon);
  3332→
  3333→    // Return shape ID as userdata
  3334→    b2ShapeId* ud = (b2ShapeId*)lua_newuserdata(L, sizeof(b2ShapeId));
  3335→    *ud = shape_id;
  3336→    return 1;
  3337→}
  3338→
  3339→// Step 7: Body properties - Position/rotation setters
... [5 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3326→
  3327→    // Create polygon from hull
  3328→    b2Polygon polygon = b2MakePolygon(&hull, 0.0f);
  3329→
  3330→    // Create shape
  3331→    b2ShapeId shape_id = b2CreatePolygonShape(*body_id, &shape_def, &polygon);
  3332→
  3333→    // Store tag index in shape's user data for event lookup
  3334→    int tag_index = (int)(tag - physics_tags);
  3335→    b2Shape_SetUserData(shape_id, (void*)(uintptr_t)tag_index);
  3336→
  3337→    // Return shape ID as userdata
  3338→    b2ShapeId* ud = (b2ShapeId*)lua_newuserdata(L, sizeof(b2ShapeId));
  3339→    *ud = shape_id;
  3340→    return 1;
  3341→}
  3342→
  3343→// Step 7: Body properties - Position/rotation setters
  3344→static int l_physics_set_position(lua_State* L) {
  3345→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  3346→    if (!body_id || !b2Body_IsValid(*body_id)) {
  3347→        return luaL_error(L, "Invalid body");

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

288→
   289→// Get tag index from shape's custom data (stored during shape creation)
   290→static int physics_get_shape_tag(b2ShapeId shape_id) {
   291→    if (!b2Shape_IsValid(shape_id)) return -1;
   292→    // We store tag index in shape's user data
   293→    uintptr_t tag_data = (uintptr_t)b2Shape_GetUserData(shape_id);
   294→    return (int)tag_data;
   295→}
   296→
   297→// Texture
   298→typedef struct {
   299→    GLuint id;
   300→    int width;
   301→    int height;
   302→} Texture;
   303→
   304→// Load a texture from file using stb_image
   305→static Texture* texture_load(const char* path) {
   306→    int width, height, channels;
   307→    stbi_set_flip_vertically_on_load(0);  // Don't flip - we handle Y in our coordinate system

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   285→    sensor_begin_count = 0;
   286→    sensor_end_count = 0;
   287→}
   288→
   289→// Get tag index from shape's custom data (stored during shape creation)
   290→static int physics_get_shape_tag(b2ShapeId shape_id) {
   291→    if (!b2Shape_IsValid(shape_id)) return -1;
   292→    // We store tag index in shape's user data
   293→    uintptr_t tag_data = (uintptr_t)b2Shape_GetUserData(shape_id);
   294→    return (int)tag_data;
   295→}
   296→
   297→// Process physics events after b2World_Step
   298→// Retrieves all events from Box2D and buffers them with tag info for Lua queries
   299→static void physics_process_events(void) {
   300→    if (!physics_initialized) return;
   301→
   302→    // Get contact events
   303→    b2ContactEvents contact_events = b2World_GetContactEvents(physics_world);
   304→
   305→    // Process contact begin events
   306→    for (int i = 0; i < contact_events.beginCount && contact_begin_count < MAX_PHYSICS_EVENTS; i++) {
   307→        b2ContactBeginTouchEvent* e = &contact_events.beginEvents[i];
   308→        if (!b2Shape_IsValid(e->shapeIdA) || !b2Shape_IsValid(e->shapeIdB)) continue;
   309→
   310→        int tag_a = physics_get_shape_tag(e->shapeIdA);
   311→        int tag_b = physics_get_shape_tag(e->shapeIdB);
   312→        if (tag_a < 0 || tag_b < 0) continue;
   313→
... [92 more lines]

292-    // We store tag index in shape's user data
293-    uintptr_t tag_data = (uintptr_t)b2Shape_GetUserData(shape_id);
294-    return (int)tag_data;
295-}
296-
297:// Process physics events after b2World_Step
298-// Retrieves all events from Box2D and buffers them with tag info for Lua queries
299-static void physics_process_events(void) {
300-    if (!physics_initialized) return;
301-
302-    // Get contact events
--
4798-        // Update holds (track how long actions have been held)
4799-        holds_update((float)PHYSICS_RATE);
4800-
4801-        // Step physics world
4802-        if (physics_initialized && physics_enabled) {
4803:            b2World_Step(physics_world, (float)PHYSICS_RATE, 4);  // 4 sub-steps recommended
4804-        }
4805-
4806-        // Call Lua update (skip if in error state)
4807-        if (!error_state) {
4808-            lua_pushcfunction(L, traceback);

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  4797→
  4798→        // Update holds (track how long actions have been held)
  4799→        holds_update((float)PHYSICS_RATE);
  4800→
  4801→        // Step physics world
  4802→        if (physics_initialized && physics_enabled) {
  4803→            physics_clear_events();  // Clear event buffers before step
  4804→            b2World_Step(physics_world, (float)PHYSICS_RATE, 4);  // 4 sub-steps recommended
  4805→            physics_process_events();  // Buffer events for Lua queries
  4806→        }
  4807→
  4808→        // Call Lua update (skip if in error state)
  4809→        if (!error_state) {
  4810→            lua_pushcfunction(L, traceback);
  4811→            int err_handler = lua_gettop(L);
  4812→            lua_getglobal(L, "update");

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

4195-    // Physics - Shape properties
4196-    lua_register(L, "physics_shape_set_friction", l_physics_shape_set_friction);
4197-    lua_register(L, "physics_shape_get_friction", l_physics_shape_get_friction);
4198-    lua_register(L, "physics_shape_set_restitution", l_physics_shape_set_restitution);
4199-    lua_register(L, "physics_shape_get_restitution", l_physics_shape_get_restitution);
4200:    lua_register(L, "physics_shape_is_valid", l_physics_shape_is_valid);
4201-    lua_register(L, "physics_shape_get_body", l_physics_shape_get_body);
4202-    lua_register(L, "physics_shape_set_density", l_physics_shape_set_density);
4203-    lua_register(L, "physics_shape_get_density", l_physics_shape_get_density);
4204-    // Physics - Additional body queries
4205-    lua_register(L, "physics_get_body_type", l_physics_get_body_type);

3635→    locks.angularZ = fixed;
  3636→    b2Body_SetMotionLocks(*body_id, locks);
  3637→    return 0;
  3638→}
  3639→
  3640→static int l_physics_set_bullet(lua_State* L) {
  3641→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  3642→    if (!body_id || !b2Body_IsValid(*body_id)) {
  3643→        return luaL_error(L, "Invalid body");
  3644→    }
  3645→    bool bullet = lua_toboolean(L, 2);
  3646→    b2Body_SetBullet(*body_id, bullet);
  3647→    return 0;
  3648→}
  3649→
  3650→// Step 7: Body properties - User data
  3651→static int l_physics_set_user_data(lua_State* L) {
  3652→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  3653→    if (!body_id || !b2Body_IsValid(*body_id)) {
  3654→        return luaL_error(L, "Invalid body");
  3655→    }
  3656→    lua_Integer id = luaL_checkinteger(L, 2);
  3657→    b2Body_SetUserData(*body_id, (void*)(intptr_t)id);
  3658→    return 0;
  3659→}
  3660→
  3661→static int l_physics_get_user_data(lua_State* L) {
  3662→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  3663→    if (!body_id || !b2Body_IsValid(*body_id)) {
  3664→        return luaL_error(L, "Invalid body");

3789:static int l_physics_set_awake(lua_State* L) {
3790-    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
3791-    if (!body_id || !b2Body_IsValid(*body_id)) {
3792-        return luaL_error(L, "Invalid body");
3793-    }
3794-    bool awake = lua_toboolean(L, 2);
3795-    b2Body_SetAwake(*body_id, awake);
3796-    return 0;
3797-}
3798-
3799-// Input Lua bindings
3800-static int l_key_is_down(lua_State* L) {
3801-    const char* key_name = luaL_checkstring(L, 1);
3802-    SDL_Scancode scancode = key_name_to_scancode(key_name);
3803-    if (scancode == SDL_SCANCODE_UNKNOWN) {
3804-        lua_pushboolean(L, 0);
--
4208:    lua_register(L, "physics_set_awake", l_physics_set_awake);
4209-    // Input - Keyboard
4210-    lua_register(L, "key_is_down", l_key_is_down);
4211-    lua_register(L, "key_is_pressed", l_key_is_pressed);
4212-    lua_register(L, "key_is_released", l_key_is_released);
4213-    // Input - Mouse
4214-    lua_register(L, "mouse_position", l_mouse_position);
4215-    lua_register(L, "mouse_delta", l_mouse_delta);
4216-    lua_register(L, "mouse_set_visible", l_mouse_set_visible);
4217-    lua_register(L, "mouse_set_grabbed", l_mouse_set_grabbed);
4218-    lua_register(L, "mouse_is_down", l_mouse_is_down);
4219-    lua_register(L, "mouse_is_pressed", l_mouse_is_pressed);
4220-    lua_register(L, "mouse_is_released", l_mouse_is_released);
... [3 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3785→    lua_pushboolean(L, awake);
  3786→    return 1;
  3787→}
  3788→
  3789→static int l_physics_set_awake(lua_State* L) {
  3790→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  3791→    if (!body_id || !b2Body_IsValid(*body_id)) {
  3792→        return luaL_error(L, "Invalid body");
  3793→    }
  3794→    bool awake = lua_toboolean(L, 2);
  3795→    b2Body_SetAwake(*body_id, awake);
  3796→    return 0;
  3797→}
  3798→
  3799→// Step 8: Debug function to print event counts
  3800→static int l_physics_debug_events(lua_State* L) {
  3801→    printf("Physics Events - Contact Begin: %d, End: %d, Hit: %d | Sensor Begin: %d, End: %d\n",
  3802→           contact_begin_count, contact_end_count, hit_count,
  3803→           sensor_begin_count, sensor_end_count);
  3804→    return 0;
  3805→}
  3806→
  3807→// Input Lua bindings
  3808→static int l_key_is_down(lua_State* L) {
  3809→    const char* key_name = luaL_checkstring(L, 1);
  3810→    SDL_Scancode scancode = key_name_to_scancode(key_name);
  3811→    if (scancode == SDL_SCANCODE_UNKNOWN) {

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  4212→    // Physics - Additional body queries
  4213→    lua_register(L, "physics_get_body_type", l_physics_get_body_type);
  4214→    lua_register(L, "physics_get_mass", l_physics_get_mass);
  4215→    lua_register(L, "physics_is_awake", l_physics_is_awake);
  4216→    lua_register(L, "physics_set_awake", l_physics_set_awake);
  4217→    // Physics - Event debugging (Step 8)
  4218→    lua_register(L, "physics_debug_events", l_physics_debug_events);
  4219→    // Input - Keyboard
  4220→    lua_register(L, "key_is_down", l_key_is_down);
  4221→    lua_register(L, "key_is_pressed", l_key_is_pressed);
  4222→    lua_register(L, "key_is_released", l_key_is_released);
  4223→    // Input - Mouse

anchor.c
src/anchor.c(459): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1115): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1109): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1501): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1779): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1785): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1895): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1904): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1998): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2000): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2645): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(3001): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

95→        end
    96→    end
    97→end
    98→
    99→function update(dt)
   100→    -- Create body on Space
   101→    if is_pressed('space') then
   102→        local x = math.random(50, screen_w - 50)
   103→        local y = 50
   104→        local body = physics_create_body('dynamic', x, y)
   105→        local shape = physics_add_circle(body, 'ball', smile_size / 2)
   106→        physics_shape_set_restitution(shape, 1.0)  -- Bouncy!
   107→        table.insert(dynamic_bodies, body)
   108→        table.insert(dynamic_shapes, shape)
   109→        print(string.format("Created bouncy ball at %.0f, %.0f", x, y))
   110→    end
   111→
   112→    -- Destroy oldest body on D
   113→    if is_pressed('d') and #dynamic_bodies > 0 then
   114→        local body = table.remove(dynamic_bodies, 1)
   115→        table.remove(dynamic_shapes, 1)
   116→        physics_destroy_body(body)
   117→        print(string.format("Destroyed body - Remaining: %d", #dynamic_bodies))
   118→    end
   119→

160→        for _, body in ipairs(dynamic_bodies) do
   161→            if physics_body_is_valid(body) then
   162→                physics_set_gravity_scale(body, 1.0)
   163→            end
   164→        end
   165→        print("Normal gravity")
   166→    end
   167→
   168→    -- Draw background
   169→    layer_rectangle(bg_layer, 0, 0, screen_w, screen_h, bg_color)
   170→
   171→    -- Draw objects to shadow, outline, and game layers
   172→    draw_objects(shadow_layer)
   173→    draw_objects(outline_layer)
   174→    draw_objects(game_layer)
   175→
   176→    -- Apply shaders
   177→    layer_apply_shader(shadow_layer, shadow_shader)
   178→    layer_shader_set_vec2(outline_layer, outline_shader, "u_pixel_size", 1/screen_w, 1/screen_h)
   179→    layer_apply_shader(outline_layer, outline_shader)
   180→
   181→    -- Composite layers (shadow at offset for drop shadow effect)
   182→    layer_draw(bg_layer)
   183→    layer_draw(shadow_layer, 4, 4)
   184→    layer_draw(outline_layer)
   185→    layer_draw(game_layer)
   186→end
   187→

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   161→            if physics_body_is_valid(body) then
   162→                physics_set_gravity_scale(body, 1.0)
   163→            end
   164→        end
   165→        print("Normal gravity")
   166→    end
   167→
   168→    -- E: Print event counts (debug)
   169→    if is_pressed('e') then
   170→        physics_debug_events()
   171→    end
   172→
   173→    -- Draw background
   174→    layer_rectangle(bg_layer, 0, 0, screen_w, screen_h, bg_color)
   175→
   176→    -- Draw objects to shadow, outline, and game layers
   177→    draw_objects(shadow_layer)

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   293→    uintptr_t tag_data = (uintptr_t)b2Shape_GetUserData(shape_id);
   294→    return (int)tag_data;
   295→}
   296→
   297→// Process physics events after b2World_Step
   298→// Retrieves all events from Box2D and buffers them with tag info for Lua queries
   299→static void physics_process_events(void) {
   300→    if (!physics_initialized) return;
   301→
   302→    // Get contact events
   303→    b2ContactEvents contact_events = b2World_GetContactEvents(physics_world);
   304→
   305→    // Debug: print raw event counts from Box2D
   306→    if (contact_events.beginCount > 0 || contact_events.endCount > 0 || contact_events.hitCount > 0) {
   307→        printf("Box2D Contact Events - Begin: %d, End: %d, Hit: %d\n",
   308→               contact_events.beginCount, contact_events.endCount, contact_events.hitCount);
   309→    }
   310→
   311→    // Process contact begin events
   312→    for (int i = 0; i < contact_events.beginCount && contact_begin_count < MAX_PHYSICS_EVENTS; i++) {
   313→        b2ContactBeginTouchEvent* e = &contact_events.beginEvents[i];

367-    }
368-
369:    // Get sensor events
370-    b2SensorEvents sensor_events = b2World_GetSensorEvents(physics_world);
371-
372-    // Process sensor begin events
373-    for (int i = 0; i < sensor_events.beginCount && sensor_begin_count < MAX_PHYSICS_EVENTS; i++) {
374-        b2SensorBeginTouchEvent* e = &sensor_events.beginEvents[i];

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   365→        ev->normal_y = e->normal.y;
   366→        ev->approach_speed = e->approachSpeed * pixels_per_meter;
   367→    }
   368→
   369→    // Get sensor events
   370→    b2SensorEvents sensor_events = b2World_GetSensorEvents(physics_world);
   371→
   372→    // Debug: print raw sensor event counts from Box2D
   373→    if (sensor_events.beginCount > 0 || sensor_events.endCount > 0) {
   374→        printf("Box2D Sensor Events - Begin: %d, End: %d\n",
   375→               sensor_events.beginCount, sensor_events.endCount);
   376→    }
   377→
   378→    // Process sensor begin events
   379→    for (int i = 0; i < sensor_events.beginCount && sensor_begin_count < MAX_PHYSICS_EVENTS; i++) {
   380→        b2SensorBeginTouchEvent* e = &sensor_events.beginEvents[i];
   381→        if (!b2Shape_IsValid(e->sensorShapeId) || !b2Shape_IsValid(e->visitorShapeId)) continue;
   382→

anchor.c
src/anchor.c(471): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1127): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1121): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1513): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1791): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1797): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1907): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1916): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2010): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2012): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2657): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(3013): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

30→physics_set_meter_scale(64)
    31→
    32→-- Register physics tags
    33→physics_register_tag('ground')
    34→physics_register_tag('ball')
    35→
    36→-- Enable collision between balls and ground
    37→physics_enable_collision('ball', 'ground')
    38→physics_enable_collision('ball', 'ball')
    39→
    40→-- Create static ground body with box shape (90% width, drawn as rounded rectangle)
    41→local ground_width = screen_w * 0.9
    42→local ground_height = 12
    43→local ground_radius = 6
    44→local ground_body = physics_create_body('static', screen_w/2, screen_h - 20)
    45→physics_add_box(ground_body, 'ground', ground_width, ground_height)
    46→
    47→-- Create left and right walls (go up to 10% from top)
    48→local wall_width = 12
    49→local wall_top = screen_h * 0.1

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    32→-- Register physics tags
    33→physics_register_tag('ground')
    34→physics_register_tag('ball')
    35→
    36→-- Enable collision between balls and ground
    37→physics_enable_collision('ball', 'ground')
    38→-- physics_enable_collision('ball', 'ball')  -- Disabled: balls ghost through each other
    39→physics_enable_sensor('ball', 'ball')  -- But generate sensor events when overlapping
    40→
    41→-- Create static ground body with box shape (90% width, drawn as rounded rectangle)
    42→local ground_width = screen_w * 0.9
    43→local ground_height = 12

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    32→-- Register physics tags
    33→physics_register_tag('ground')
    34→physics_register_tag('ball')
    35→
    36→-- Enable collision between balls and ground
    37→physics_enable_collision('ball', 'ground')
    38→physics_enable_collision('ball', 'ball')
    39→
    40→-- Register a sensor zone tag
    41→physics_register_tag('zone')
    42→physics_enable_sensor('zone', 'ball')  -- Zone detects balls entering/exiting
    43→
    44→-- Create static ground body with box shape (90% width, drawn as rounded rectangle)
    45→local ground_width = screen_w * 0.9
    46→local ground_height = 12

58→
    59→local left_wall = physics_create_body('static', screen_w/2 - wall_x_offset, wall_y)
    60→physics_add_box(left_wall, 'ground', wall_width, wall_height)
    61→
    62→local right_wall = physics_create_body('static', screen_w/2 + wall_x_offset, wall_y)
    63→physics_add_box(right_wall, 'ground', wall_width, wall_height)
    64→
    65→print("Created ground and walls")
    66→
    67→-- Table to track dynamic bodies and their shapes
    68→local dynamic_bodies = {}
    69→local dynamic_shapes = {}
    70→
    71→-- Helper to get a random ball
    72→local function get_random_ball()
    73→    if #dynamic_bodies == 0 then return nil end
    74→    return dynamic_bodies[math.random(1, #dynamic_bodies)]
    75→end
    76→
    77→local function draw_objects(layer)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    58→
    59→local left_wall = physics_create_body('static', screen_w/2 - wall_x_offset, wall_y)
    60→physics_add_box(left_wall, 'ground', wall_width, wall_height)
    61→
    62→local right_wall = physics_create_body('static', screen_w/2 + wall_x_offset, wall_y)
    63→physics_add_box(right_wall, 'ground', wall_width, wall_height)
    64→
    65→-- Create a sensor zone in the middle (balls pass through but trigger events)
    66→local zone_body = physics_create_body('static', screen_w/2, screen_h/2)
    67→local zone_shape = physics_add_box(zone_body, 'zone', 100, 60, {sensor = true})
    68→
    69→print("Created ground, walls, and sensor zone")
    70→
    71→-- Table to track dynamic bodies and their shapes
    72→local dynamic_bodies = {}
    73→local dynamic_shapes = {}

77→    if #dynamic_bodies == 0 then return nil end
    78→    return dynamic_bodies[math.random(1, #dynamic_bodies)]
    79→end
    80→
    81→local function draw_objects(layer)
    82→    -- Draw ground (plain rectangle)
    83→    local gx, gy = physics_get_position(ground_body)
    84→    layer_rectangle(layer, gx - ground_width/2, gy - ground_height/2, ground_width, ground_height, green)
    85→
    86→    -- Draw walls (rounded tops)
    87→    local lx, ly = physics_get_position(left_wall)
    88→    layer_rectangle(layer, lx - wall_width/2, ly - wall_height/2 + ground_radius, wall_width, wall_height - ground_radius, green)
    89→    layer_circle(layer, lx, ly - wall_height/2 + ground_radius, ground_radius, green)
    90→
    91→    local rx, ry = physics_get_position(right_wall)
    92→    layer_rectangle(layer, rx - wall_width/2, ry - wall_height/2 + ground_radius, wall_width, wall_height - ground_radius, green)
    93→    layer_circle(layer, rx, ry - wall_height/2 + ground_radius, ground_radius, green)
    94→
    95→    -- Draw dynamic bodies (emoji balls)
    96→    for i, body in ipairs(dynamic_bodies) do
    97→        if physics_body_is_valid(body) then
    98→            local x, y = physics_get_position(body)
    99→            local angle = physics_get_angle(body)
   100→            layer_push(layer, x, y, angle, smile_scale, smile_scale)
   101→            layer_draw_texture(layer, smile_tex, 0, 0)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    82→    -- Draw ground (plain rectangle)
    83→    local gx, gy = physics_get_position(ground_body)
    84→    layer_rectangle(layer, gx - ground_width/2, gy - ground_height/2, ground_width, ground_height, green)
    85→
    86→    -- Draw walls (rounded tops)
    87→    local lx, ly = physics_get_position(left_wall)
    88→    layer_rectangle(layer, lx - wall_width/2, ly - wall_height/2 + ground_radius, wall_width, wall_height - ground_radius, green)
    89→    layer_circle(layer, lx, ly - wall_height/2 + ground_radius, ground_radius, green)
    90→
    91→    local rx, ry = physics_get_position(right_wall)
    92→    layer_rectangle(layer, rx - wall_width/2, ry - wall_height/2 + ground_radius, wall_width, wall_height - ground_radius, green)
    93→    layer_circle(layer, rx, ry - wall_height/2 + ground_radius, ground_radius, green)
    94→
    95→    -- Draw sensor zone (semi-transparent blue)
    96→    local zx, zy = physics_get_position(zone_body)
    97→    layer_rectangle(layer, zx - 50, zy - 30, 100, 60, rgba(100, 150, 255, 100))
    98→
    99→    -- Draw dynamic bodies (emoji balls)
   100→    for i, body in ipairs(dynamic_bodies) do
   101→        if physics_body_is_valid(body) then
   102→            local x, y = physics_get_position(body)
   103→            local angle = physics_get_angle(body)

Web search results for query: "Box2D 3.0 sensor events enableSensorEvents isSensor contact events documentation"

Web search error: unavailable

I apologize, but the web search tool is currently unavailable. However, I can share what I know from my training data about Box2D 3.0 sensor events:

In Box2D 3.0 (also known as Box2D v3 or the rewritten version), the API changed significantly from Box2D 2.x. Here's what I know about sensors:

## Sensors in Box2D 3.0

1. **Creating a Sensor**: You set a shape as a sensor using `b2ShapeDef` with the `isSensor` field set to `true`. Sensors detect overlaps but don't generate collision responses.

2. **Enabling Sensor Events**: To receive sensor events, you need to:
   - Set `enableSensorEvents = true` in your `b2ShapeDef` when creating the shape
   - Query sensor events from the world after stepping

3. **Getting Sensor Events**: After `b2World_Step()`, you can get sensor events using:
   ```c
   b2SensorEvents sensorEvents = b2World_GetSensorEvents(worldId);
   ```
   
   This returns begin and end events for sensor overlaps:
   - `sensorEvents.beginEvents` - array of new overlaps
   - `sensorEvents.endEvents` - array of ended overlaps

4. **Event Structure**: Each sensor event contains shape IDs for both the sensor shape and the visitor shape that entered/exited.

For the most up-to-date and complete documentation, I'd recommend checking:
- The official Box2D GitHub repository (box2d/box2d)
- The Box2D 3.0 samples/examples included in the repository
... [6 more lines]

E:\a327ex\Anchor\engine\include\box2d\box2d.h-583-B2_API void b2Shape_SetFilter( b2ShapeId shapeId, b2Filter filter );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-584-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-585-/// Enable sensor events for this shape.
E:\a327ex\Anchor\engine\include\box2d\box2d.h:586:/// @see b2ShapeDef::enableSensorEvents
E:\a327ex\Anchor\engine\include\box2d\box2d.h-587-B2_API void b2Shape_EnableSensorEvents( b2ShapeId shapeId, bool flag );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-588-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-589-/// Returns true if sensor events are enabled.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-590-B2_API bool b2Shape_AreSensorEventsEnabled( b2ShapeId shapeId );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-591-
--
E:\a327ex\Anchor\engine\include\box2d\shape.h-39-   };
E:\a327ex\Anchor\engine\include\box2d\shape.h-40-
E:\a327ex\Anchor\engine\include\box2d\shape.h-41-   uint16_t generation;
E:\a327ex\Anchor\engine\include\box2d\shape.h:42:   bool enableSensorEvents;
E:\a327ex\Anchor\engine\include\box2d\shape.h-43-   bool enableContactEvents;
E:\a327ex\Anchor\engine\include\box2d\shape.h-44-   bool enableCustomFiltering;
E:\a327ex\Anchor\engine\include\box2d\shape.h-45-   bool enableHitEvents;
E:\a327ex\Anchor\engine\include\box2d\shape.h-46-   bool enablePreSolveEvents;
E:\a327ex\Anchor\engine\include\box2d\shape.h-47-   bool enlargedAABB;
--
E:\a327ex\Anchor\engine\include\box2d\sensor.c-65-  b2Shape* otherShape = b2ShapeArray_Get( &world->shapes, shapeId );
E:\a327ex\Anchor\engine\include\box2d\sensor.c-66-
E:\a327ex\Anchor\engine\include\box2d\sensor.c-67-  // Are sensor events enabled on the other shape?
E:\a327ex\Anchor\engine\include\box2d\sensor.c:68:  if ( otherShape->enableSensorEvents == false )
E:\a327ex\Anchor\engine\include\box2d\sensor.c-69-  {
E:\a327ex\Anchor\engine\include\box2d\sensor.c-70-      return true;
E:\a327ex\Anchor\engine\include\box2d\sensor.c-71-  }
E:\a327ex\Anchor\engine\include\box2d\sensor.c-72-
E:\a327ex\Anchor\engine\include\box2d\sensor.c-73-  // Skip shapes on the same body
--
... [113 more lines]

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    36→-- Enable collision between balls and ground
    37→physics_enable_collision('ball', 'ground')
    38→physics_enable_collision('ball', 'ball')
    39→
    40→-- Register a sensor zone tag
    41→physics_register_tag('zone')
    42→physics_enable_sensor('zone', 'ball')  -- Zone detects balls entering/exiting
    43→physics_enable_sensor('ball', 'zone')  -- Ball also needs enableSensorEvents=true
    44→
    45→-- Create static ground body with box shape (90% width, drawn as rounded rectangle)
    46→local ground_width = screen_w * 0.9
    47→local ground_height = 12

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   368→
   369→    // Get sensor events
   370→    b2SensorEvents sensor_events = b2World_GetSensorEvents(physics_world);
   371→
   372→    // Debug: print raw sensor event counts from Box2D
   373→    if (sensor_events.beginCount > 0 || sensor_events.endCount > 0) {
   374→        printf("Box2D Sensor Events - Begin: %d, End: %d\n",
   375→               sensor_events.beginCount, sensor_events.endCount);
   376→    }
   377→
   378→    // Debug: print sensor count in world
   379→    static int debug_frame = 0;
   380→    if (debug_frame++ % 600 == 0) {  // Every ~5 seconds at 120Hz
   381→        b2Counters counters = b2World_GetCounters(physics_world);
   382→        printf("Debug: sensors=%d, shapes=%d, contacts=%d\n",
   383→               counters.sensorCount, counters.shapeCount, counters.contactCount);
   384→    }
   385→
   386→    // Process sensor begin events
   387→    for (int i = 0; i < sensor_events.beginCount && sensor_begin_count < MAX_PHYSICS_EVENTS; i++) {
   388→        b2SensorBeginTouchEvent* e = &sensor_events.beginEvents[i];

3206-
3207-// Helper to setup shape def from tag
3208:static void setup_shape_def_from_tag(b2ShapeDef* def, PhysicsTag* tag, bool is_sensor) {
3209-    def->filter.categoryBits = tag->category_bit;
3210-    def->filter.maskBits = tag->collision_mask;
3211-    def->isSensor = is_sensor;
3212-
3213-    // Enable events based on tag configuration
3214-    def->enableSensorEvents = (tag->sensor_mask != 0);
3215-    def->enableContactEvents = (tag->collision_mask != 0);
3216-    def->enableHitEvents = (tag->hit_mask != 0);
3217-}
3218-
3219-// physics_add_circle(body, tag, radius, [opts])
3220-static int l_physics_add_circle(lua_State* L) {
3221-    if (!physics_initialized) {
3222-        return luaL_error(L, "Physics not initialized");
3223-    }
--
3251-    // Create shape def
3252-    b2ShapeDef shape_def = b2DefaultShapeDef();
3253:    setup_shape_def_from_tag(&shape_def, tag, is_sensor);
3254-
3255-    // Create circle geometry (convert to meters)
3256-    b2Circle circle = {
3257-        .center = { offset_x / pixels_per_meter, offset_y / pixels_per_meter },
3258-        .radius = radius / pixels_per_meter
3259-    };
3260-
3261-    // Create shape
... [64 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3203→    lua_pushboolean(L, b2Body_IsValid(*body_id));
  3204→    return 1;
  3205→}
  3206→
  3207→// Helper to setup shape def from tag
  3208→static void setup_shape_def_from_tag(b2ShapeDef* def, PhysicsTag* tag, bool is_sensor) {
  3209→    def->filter.categoryBits = tag->category_bit;
  3210→    def->filter.maskBits = tag->collision_mask | tag->sensor_mask;  // Include both for filtering
  3211→    def->isSensor = is_sensor;
  3212→
  3213→    // Enable events based on tag configuration
  3214→    def->enableSensorEvents = (tag->sensor_mask != 0);
  3215→    def->enableContactEvents = (tag->collision_mask != 0);
  3216→    def->enableHitEvents = (tag->hit_mask != 0);
  3217→}
  3218→
  3219→// physics_add_circle(body, tag, radius, [opts])
  3220→static int l_physics_add_circle(lua_State* L) {
  3221→    if (!physics_initialized) {

Exit code 1
anchor.c
src/anchor.c(383): error C2039: 'sensorCount': is not a member of 'b2Counters'
E:\a327ex\Anchor\engine\include\box2d\types.h(526): note: see declaration of 'b2Counters'
src/anchor.c(382): warning C4473: 'printf' : not enough arguments passed for format string
src/anchor.c(382): note: placeholders and their parameters expect 3 variadic arguments, but 2 were provided
src/anchor.c(382): note: the missing variadic argument 3 is required by format string '%d'
src/anchor.c(479): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1135): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1129): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1521): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1799): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1805): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1915): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1924): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2018): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2020): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2665): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(3021): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
Build failed!

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   374→        printf("Box2D Sensor Events - Begin: %d, End: %d\n",
   375→               sensor_events.beginCount, sensor_events.endCount);
   376→    }
   377→
   378→    // Debug: print shape count in world
   379→    static int debug_frame = 0;
   380→    if (debug_frame++ % 600 == 0) {  // Every ~5 seconds at 120Hz
   381→        b2Counters counters = b2World_GetCounters(physics_world);
   382→        printf("Debug: shapes=%d, contacts=%d\n",
   383→               counters.shapeCount, counters.contactCount);
   384→    }
   385→
   386→    // Process sensor begin events
   387→    for (int i = 0; i < sensor_events.beginCount && sensor_begin_count < MAX_PHYSICS_EVENTS; i++) {
   388→        b2SensorBeginTouchEvent* e = &sensor_events.beginEvents[i];

anchor.c
src/anchor.c(479): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1135): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1129): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1521): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1799): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1805): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1915): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1924): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2018): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2020): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2665): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(3021): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

1→print("main.lua loaded - Physics Test (Phase 7 - Step 7: Body Properties)")
     2→
     3→set_shape_filter("rough")
     4→input_bind_all()
     5→
     6→local screen_w, screen_h = 480, 270
     7→
     8→-- Colors (twitter_emoji theme from super emoji box)
     9→local bg_color = rgba(231, 232, 233, 255)
    10→local green = rgba(122, 179, 87, 255)
    11→
    12→-- Layers (bottom to top: background, shadow, outline, game)
    13→local bg_layer = layer_create('background')
    14→local shadow_layer = layer_create('shadow')
    15→local outline_layer = layer_create('outline')
    16→local game_layer = layer_create('game')
    17→
    18→-- Shaders
    19→local shadow_shader = shader_load_file("shaders/shadow.frag")
    20→local outline_shader = shader_load_file("shaders/outline.frag")
    21→
    22→-- Textures
    23→local smile_tex = texture_load("assets/slight_smile.png")
    24→local smile_size = 20
    25→local smile_scale = smile_size / texture_get_width(smile_tex)
    26→
    27→-- Initialize physics
    28→physics_init()
    29→physics_set_gravity(0, 500)
    30→physics_set_meter_scale(64)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     8→-- Colors (twitter_emoji theme from super emoji box)
     9→local bg_color = rgba(231, 232, 233, 255)
    10→local green = rgba(122, 179, 87, 255)
    11→
    12→-- Layers (bottom to top: background, shadow, outline, game, ui)
    13→local bg_layer = layer_create('background')
    14→local shadow_layer = layer_create('shadow')
    15→local outline_layer = layer_create('outline')
    16→local game_layer = layer_create('game')
    17→local ui_layer = layer_create('ui')  -- No shaders, for overlays like sensor zones
    18→
    19→-- Shaders
    20→local shadow_shader = shader_load_file("shaders/shadow.frag")
    21→local outline_shader = shader_load_file("shaders/outline.frag")

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    93→    local rx, ry = physics_get_position(right_wall)
    94→    layer_rectangle(layer, rx - wall_width/2, ry - wall_height/2 + ground_radius, wall_width, wall_height - ground_radius, green)
    95→    layer_circle(layer, rx, ry - wall_height/2 + ground_radius, ground_radius, green)
    96→
    97→    -- Draw dynamic bodies (emoji balls)
    98→    for i, body in ipairs(dynamic_bodies) do
    99→        if physics_body_is_valid(body) then
   100→            local x, y = physics_get_position(body)
   101→            local angle = physics_get_angle(body)

175→        print("Normal gravity")
   176→    end
   177→
   178→    -- E: Print event counts (debug)
   179→    if is_pressed('e') then
   180→        physics_debug_events()
   181→    end
   182→
   183→    -- Draw background
   184→    layer_rectangle(bg_layer, 0, 0, screen_w, screen_h, bg_color)
   185→
   186→    -- Draw objects to shadow, outline, and game layers
   187→    draw_objects(shadow_layer)
   188→    draw_objects(outline_layer)
   189→    draw_objects(game_layer)
   190→
   191→    -- Apply shaders
   192→    layer_apply_shader(shadow_layer, shadow_shader)
   193→    layer_shader_set_vec2(outline_layer, outline_shader, "u_pixel_size", 1/screen_w, 1/screen_h)
   194→    layer_apply_shader(outline_layer, outline_shader)
   195→
   196→    -- Composite layers (shadow at offset for drop shadow effect)
   197→    layer_draw(bg_layer)
   198→    layer_draw(shadow_layer, 4, 4)
   199→    layer_draw(outline_layer)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   179→    if is_pressed('e') then
   180→        physics_debug_events()
   181→    end
   182→
   183→    -- Draw background
   184→    layer_rectangle(bg_layer, 0, 0, screen_w, screen_h, bg_color)
   185→
   186→    -- Draw objects to shadow, outline, and game layers
   187→    draw_objects(shadow_layer)
   188→    draw_objects(outline_layer)
   189→    draw_objects(game_layer)
   190→
   191→    -- Draw sensor zone to ui layer (no shaders)
   192→    local zx, zy = physics_get_position(zone_body)
   193→    layer_rectangle(ui_layer, zx - 50, zy - 30, 100, 60, rgba(100, 150, 255, 100))
   194→
   195→    -- Apply shaders
   196→    layer_apply_shader(shadow_layer, shadow_shader)
   197→    layer_shader_set_vec2(outline_layer, outline_shader, "u_pixel_size", 1/screen_w, 1/screen_h)
   198→    layer_apply_shader(outline_layer, outline_shader)
   199→
   200→    -- Composite layers (shadow at offset for drop shadow effect)
   201→    layer_draw(bg_layer)
   202→    layer_draw(shadow_layer, 4, 4)
   203→    layer_draw(outline_layer)
   204→    layer_draw(game_layer)
   205→end
   206→

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   196→    layer_apply_shader(shadow_layer, shadow_shader)
   197→    layer_shader_set_vec2(outline_layer, outline_shader, "u_pixel_size", 1/screen_w, 1/screen_h)
   198→    layer_apply_shader(outline_layer, outline_shader)
   199→
   200→    -- Composite layers (shadow at offset for drop shadow effect)
   201→    layer_draw(bg_layer)
   202→    layer_draw(shadow_layer, 4, 4)
   203→    layer_draw(outline_layer)
   204→    layer_draw(game_layer)
   205→    layer_draw(ui_layer)  -- No shaders, drawn on top
   206→end
   207→

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   187→    draw_objects(shadow_layer)
   188→    draw_objects(outline_layer)
   189→    draw_objects(game_layer)
   190→
   191→    -- Draw sensor zone to ui layer (no shaders)
   192→    local zx, zy = physics_get_position(zone_body)
   193→    layer_rectangle(ui_layer, zx - 50, zy - 30, 100, 60, rgba(100, 150, 255, 100))
   194→
   195→    -- Debug: draw same zone on outline layer to see why it's black
   196→    layer_rectangle(outline_layer, zx - 50 + 110, zy - 30, 100, 60, rgba(100, 150, 255, 100))
   197→
   198→    -- Apply shaders
   199→    layer_apply_shader(shadow_layer, shadow_shader)
   200→    layer_shader_set_vec2(outline_layer, outline_shader, "u_pixel_size", 1/screen_w, 1/screen_h)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   191→    -- Draw sensor zone to ui layer (no shaders)
   192→    local zx, zy = physics_get_position(zone_body)
   193→    layer_rectangle(ui_layer, zx - 50, zy - 30, 100, 60, rgba(100, 150, 255, 100))
   194→
   195→    -- Debug: draw same zone on game layer to see why it's black with outline shader
   196→    layer_rectangle(game_layer, zx - 50 + 110, zy - 30, 100, 60, rgba(100, 150, 255, 100))
   197→
   198→    -- Apply shaders
   199→    layer_apply_shader(shadow_layer, shadow_shader)
   200→    layer_shader_set_vec2(outline_layer, outline_shader, "u_pixel_size", 1/screen_w, 1/screen_h)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   187→    draw_objects(shadow_layer)
   188→    draw_objects(outline_layer)
   189→    draw_objects(game_layer)
   190→
   191→    -- Draw sensor zone to ui layer (no shaders)
   192→    local zx, zy = physics_get_position(zone_body)
   193→    layer_rectangle(ui_layer, zx - 50, zy - 30, 100, 60, rgba(100, 150, 255, 100))
   194→
   195→    -- Apply shaders
   196→    layer_apply_shader(shadow_layer, shadow_shader)
   197→    layer_shader_set_vec2(outline_layer, outline_shader, "u_pixel_size", 1/screen_w, 1/screen_h)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   187→    draw_objects(shadow_layer)
   188→    draw_objects(outline_layer)
   189→    draw_objects(game_layer)
   190→
   191→    -- Draw sensor zone to ui layer (no shaders)
   192→    local zx, zy = physics_get_position(zone_body)
   193→    layer_rectangle(ui_layer, zx - 50, zy - 30, 100, 60, rgba(100, 150, 255, 255))
   194→
   195→    -- Apply shaders
   196→    layer_apply_shader(shadow_layer, shadow_shader)
   197→    layer_shader_set_vec2(outline_layer, outline_shader, "u_pixel_size", 1/screen_w, 1/screen_h)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   189→    draw_objects(game_layer)
   190→
   191→    -- Draw sensor zone to ui layer (no shaders)
   192→    local zx, zy = physics_get_position(zone_body)
   193→    layer_rectangle(ui_layer, zx - 50, zy - 30, 100, 60, rgba(100, 150, 255, 200))
   194→
   195→    -- Apply shaders
   196→    layer_apply_shader(shadow_layer, shadow_shader)
   197→    layer_shader_set_vec2(outline_layer, outline_shader, "u_pixel_size", 1/screen_w, 1/screen_h)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   189→    draw_objects(game_layer)
   190→
   191→    -- Draw sensor zone to ui layer (no shaders)
   192→    local zx, zy = physics_get_position(zone_body)
   193→    layer_rectangle(ui_layer, zx - 50, zy - 30, 100, 60, rgba(100, 150, 255, 128))
   194→
   195→    -- Apply shaders
   196→    layer_apply_shader(shadow_layer, shadow_shader)
   197→    layer_shader_set_vec2(outline_layer, outline_shader, "u_pixel_size", 1/screen_w, 1/screen_h)

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   189→    draw_objects(game_layer)
   190→
   191→    -- Draw sensor zone to ui layer (no shaders)
   192→    local zx, zy = physics_get_position(zone_body)
   193→    layer_rectangle(ui_layer, zx - 50, zy - 30, 100, 60, rgba(100, 150, 255, 160))
   194→
   195→    -- Apply shaders
   196→    layer_apply_shader(shadow_layer, shadow_shader)
   197→    layer_shader_set_vec2(outline_layer, outline_shader, "u_pixel_size", 1/screen_w, 1/screen_h)

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

3805→    lua_pushboolean(L, awake);
  3806→    return 1;
  3807→}
  3808→
  3809→static int l_physics_set_awake(lua_State* L) {
  3810→    b2BodyId* body_id = (b2BodyId*)lua_touserdata(L, 1);
  3811→    if (!body_id || !b2Body_IsValid(*body_id)) {
  3812→        return luaL_error(L, "Invalid body");
  3813→    }
  3814→    bool awake = lua_toboolean(L, 2);
  3815→    b2Body_SetAwake(*body_id, awake);
  3816→    return 0;
  3817→}
  3818→
  3819→// Step 8: Debug function to print event counts
  3820→static int l_physics_debug_events(lua_State* L) {
  3821→    printf("Physics Events - Contact Begin: %d, End: %d, Hit: %d | Sensor Begin: %d, End: %d\n",
  3822→           contact_begin_count, contact_end_count, hit_count,
  3823→           sensor_begin_count, sensor_end_count);
  3824→    return 0;
  3825→}
  3826→
  3827→// Input Lua bindings
  3828→static int l_key_is_down(lua_State* L) {
  3829→    const char* key_name = luaL_checkstring(L, 1);
  3830→    SDL_Scancode scancode = key_name_to_scancode(key_name);
  3831→    if (scancode == SDL_SCANCODE_UNKNOWN) {
  3832→        lua_pushboolean(L, 0);
  3833→    } else {
  3834→        lua_pushboolean(L, keys_current[scancode]);

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  3815→    b2Body_SetAwake(*body_id, awake);
  3816→    return 0;
  3817→}
  3818→
  3819→// Step 8: Debug function to print event counts
  3820→static int l_physics_debug_events(lua_State* L) {
  3821→    printf("Physics Events - Contact Begin: %d, End: %d, Hit: %d | Sensor Begin: %d, End: %d\n",
  3822→           contact_begin_count, contact_end_count, hit_count,
  3823→           sensor_begin_count, sensor_end_count);
  3824→    return 0;
  3825→}
  3826→
  3827→// Step 9: Event query functions
  3828→// Helper to check if two tag indices match (in either order)
  3829→static bool tags_match(int event_tag_a, int event_tag_b, int query_tag_a, int query_tag_b) {
  3830→    return (event_tag_a == query_tag_a && event_tag_b == query_tag_b) ||
  3831→           (event_tag_a == query_tag_b && event_tag_b == query_tag_a);
  3832→}
  3833→
  3834→// physics_get_collision_begin(tag_a, tag_b) -> array of {body_a, body_b, shape_a, shape_b}
  3835→static int l_physics_get_collision_begin(lua_State* L) {
  3836→    const char* tag_a_name = luaL_checkstring(L, 1);
  3837→    const char* tag_b_name = luaL_checkstring(L, 2);
  3838→
  3839→    int tag_a = physics_tag_find(tag_a_name);
  3840→    int tag_b = physics_tag_find(tag_b_name);
  3841→    if (tag_a < 0) return luaL_error(L, "Unknown tag: %s", tag_a_name);
  3842→    if (tag_b < 0) return luaL_error(L, "Unknown tag: %s", tag_b_name);
  3843→
... [227 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  4472→    lua_register(L, "physics_get_body_type", l_physics_get_body_type);
  4473→    lua_register(L, "physics_get_mass", l_physics_get_mass);
  4474→    lua_register(L, "physics_is_awake", l_physics_is_awake);
  4475→    lua_register(L, "physics_set_awake", l_physics_set_awake);
  4476→    // Physics - Event debugging (Step 8)
  4477→    lua_register(L, "physics_debug_events", l_physics_debug_events);
  4478→    // Physics - Event queries (Step 9)
  4479→    lua_register(L, "physics_get_collision_begin", l_physics_get_collision_begin);
  4480→    lua_register(L, "physics_get_collision_end", l_physics_get_collision_end);
  4481→    lua_register(L, "physics_get_hit", l_physics_get_hit);
  4482→    lua_register(L, "physics_get_sensor_begin", l_physics_get_sensor_begin);
  4483→    lua_register(L, "physics_get_sensor_end", l_physics_get_sensor_end);
  4484→    // Input - Keyboard
  4485→    lua_register(L, "key_is_down", l_key_is_down);
  4486→    lua_register(L, "key_is_pressed", l_key_is_pressed);
  4487→    lua_register(L, "key_is_released", l_key_is_released);
  4488→    // Input - Mouse

anchor.c
src/anchor.c(479): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1135): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1129): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1521): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1799): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1805): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1915): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1924): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2018): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2020): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2665): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(3021): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

175→        print("Normal gravity")
   176→    end
   177→
   178→    -- E: Print event counts (debug)
   179→    if is_pressed('e') then
   180→        physics_debug_events()
   181→    end
   182→
   183→    -- Draw background
   184→    layer_rectangle(bg_layer, 0, 0, screen_w, screen_h, bg_color)
   185→
   186→    -- Draw objects to shadow, outline, and game layers
   187→    draw_objects(shadow_layer)
   188→    draw_objects(outline_layer)
   189→    draw_objects(game_layer)
   190→
   191→    -- Draw sensor zone to ui layer (no shaders)
   192→    local zx, zy = physics_get_position(zone_body)
   193→    layer_rectangle(ui_layer, zx - 50, zy - 30, 100, 60, rgba(100, 150, 255, 160))
   194→

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   174→        end
   175→        print("Normal gravity")
   176→    end
   177→
   178→    -- E: Print event counts (debug)
   179→    if is_pressed('e') then
   180→        physics_debug_events()
   181→    end
   182→
   183→    -- Query and print sensor events
   184→    for _, e in ipairs(physics_get_sensor_begin('zone', 'ball')) do
   185→        print("Sensor BEGIN: ball entered zone")
   186→    end
   187→    for _, e in ipairs(physics_get_sensor_end('zone', 'ball')) do
   188→        print("Sensor END: ball left zone")
   189→    end
   190→
   191→    -- Query and print collision events
   192→    for _, e in ipairs(physics_get_collision_begin('ball', 'ball')) do
   193→        print("Collision BEGIN: ball hit ball")
   194→    end
   195→    for _, e in ipairs(physics_get_collision_begin('ball', 'ground')) do
   196→        print("Collision BEGIN: ball hit ground")
   197→    end
   198→
   199→    -- Draw background
   200→    layer_rectangle(bg_layer, 0, 0, screen_w, screen_h, bg_color)
   201→
   202→    -- Draw objects to shadow, outline, and game layers
... [1 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   298→// Retrieves all events from Box2D and buffers them with tag info for Lua queries
   299→static void physics_process_events(void) {
   300→    if (!physics_initialized) return;
   301→
   302→    // Get contact events
   303→    b2ContactEvents contact_events = b2World_GetContactEvents(physics_world);
   304→
   305→    // Process contact begin events
   306→    for (int i = 0; i < contact_events.beginCount && contact_begin_count < MAX_PHYSICS_EVENTS; i++) {
   307→        b2ContactBeginTouchEvent* e = &contact_events.beginEvents[i];
   308→        if (!b2Shape_IsValid(e->shapeIdA) || !b2Shape_IsValid(e->shapeIdB)) continue;
   309→

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   359→        ev->normal_y = e->normal.y;
   360→        ev->approach_speed = e->approachSpeed * pixels_per_meter;
   361→    }
   362→
   363→    // Get sensor events
   364→    b2SensorEvents sensor_events = b2World_GetSensorEvents(physics_world);
   365→
   366→    // Process sensor begin events
   367→    for (int i = 0; i < sensor_events.beginCount && sensor_begin_count < MAX_PHYSICS_EVENTS; i++) {
   368→        b2SensorBeginTouchEvent* e = &sensor_events.beginEvents[i];
   369→        if (!b2Shape_IsValid(e->sensorShapeId) || !b2Shape_IsValid(e->visitorShapeId)) continue;
   370→

anchor.c
src/anchor.c(459): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1115): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1109): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1501): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1779): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1785): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1895): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1904): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1998): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2000): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2645): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(3001): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

E:\a327ex\Anchor\engine\include\box2d\box2d.h-55-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-56-/// Overlap test for all shapes that *potentially* overlap the provided AABB
E:\a327ex\Anchor\engine\include\box2d\box2d.h:57:B2_API b2TreeStats b2World_OverlapAABB( b2WorldId worldId, b2AABB aabb, b2QueryFilter filter, b2OverlapResultFcn* fcn,
E:\a327ex\Anchor\engine\include\box2d\box2d.h-58-                                       void* context );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-59-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-60-/// Overlap test for all shapes that overlap the provided shape proxy.
E:\a327ex\Anchor\engine\include\box2d\box2d.h:61:B2_API b2TreeStats b2World_OverlapShape( b2WorldId worldId, const b2ShapeProxy* proxy, b2QueryFilter filter,
E:\a327ex\Anchor\engine\include\box2d\box2d.h-62-                                        b2OverlapResultFcn* fcn, void* context );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-63-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-64-/// Cast a ray into the world to collect shapes in the path of the ray.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-65-/// Your callback function controls whether you get the closest point, any point, or n-points.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-66-/// @note The callback function may receive shapes in any order
--
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1843-}
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1844-
E:\a327ex\Anchor\engine\include\box2d\physics_world.c:1845:b2TreeStats b2World_OverlapAABB( b2WorldId worldId, b2AABB aabb, b2QueryFilter filter, b2OverlapResultFcn* fcn, void* context )
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1846-{
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1847- b2TreeStats treeStats = { 0 };
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1848-
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1849- b2World* world = b2GetWorldFromId( worldId );
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1850- B2_ASSERT( world->locked == false );
--
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1919-}
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1920-
E:\a327ex\Anchor\engine\include\box2d\physics_world.c:1921:b2TreeStats b2World_OverlapShape( b2WorldId worldId, const b2ShapeProxy* proxy, b2QueryFilter filter, b2OverlapResultFcn* fcn,
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1922-                               void* context )
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1923-{
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1924- b2TreeStats treeStats = { 0 };
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1925-
E:\a327ex\Anchor\engine\include\box2d\physics_world.c-1926- b2World* world = b2GetWorldFromId( worldId );
... [9 more lines]

<persisted-output>
Output too large (45.9KB). Full output saved to: C:\Users\adn\.claude\projects\E--a327ex-Anchor\3ab4304c-51be-46ed-aed2-05eb85d548fc\tool-results\toolu_0186vuYGZL13bbaStGqs311B.txt

Preview (first 2KB):
E:\a327ex\Anchor\engine\include\box2d\box2d.h-59-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-60-/// Overlap test for all shapes that overlap the provided shape proxy.
E:\a327ex\Anchor\engine\include\box2d\box2d.h:61:B2_API b2TreeStats b2World_OverlapShape( b2WorldId worldId, const b2ShapeProxy* proxy, b2QueryFilter filter,
E:\a327ex\Anchor\engine\include\box2d\box2d.h-62-                                        b2OverlapResultFcn* fcn, void* context );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-63-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-64-/// Cast a ray into the world to collect shapes in the path of the ray.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-65-/// Your callback function controls whether you get the closest point, any point, or n-points.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-66-/// @note The callback function may receive shapes in any order
E:\a327ex\Anchor\engine\include\box2d\box2d.h-67-/// @param worldId The world to cast the ray against
E:\a327ex\Anchor\engine\include\box2d\box2d.h-68-/// @param origin The start point of the ray
E:\a327ex\Anchor\engine\include\box2d\box2d.h-69-/// @param translation The translation of the ray from the start point to the end point
E:\a327ex\Anchor\engine\include\box2d\box2d.h-70-/// @param filter Contains bit flags to filter unwanted shapes from the results
E:\a327ex\Anchor\engine\include\box2d\box2d.h-71-/// @param fcn A user implemented callback function
--
E:\a327ex\Anchor\engine\include\box2d\box2d.h-81-/// Cast a shape through the world. Similar to a cast ray except that a shape is cast instead of a point.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-82-///    @see b2World_CastRay
E:\a327ex\Anchor\engine\include\box2d\box2d.h:83:B2_API b2TreeStats b2World_CastShape( b2WorldId worldId, const b2ShapeProxy* proxy, b2Vec2 translation, b2QueryFilter filter,
E:\a327ex\Anchor\engine\include\box2d\box2d.h-84-                                     b2CastResultFcn* fcn, void* context );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-85-
...
</persisted-output>

No matches found

E:\a327ex\Anchor\engine\include\box2d\box2d.h:57:B2_API b2TreeStats b2World_OverlapAABB( b2WorldId worldId, b2AABB aabb, b2QueryFilter filter, b2OverlapResultFcn* fcn,
E:\a327ex\Anchor\engine\include\box2d\box2d.h:61:B2_API b2TreeStats b2World_OverlapShape( b2WorldId worldId, const b2ShapeProxy* proxy, b2QueryFilter filter,
E:\a327ex\Anchor\engine\include\box2d\physics_world.c:1845:b2TreeStats b2World_OverlapAABB( b2WorldId worldId, b2AABB aabb, b2QueryFilter filter, b2OverlapResultFcn* fcn, void* context )
E:\a327ex\Anchor\engine\include\box2d\physics_world.c:1921:b2TreeStats b2World_OverlapShape( b2WorldId worldId, const b2ShapeProxy* proxy, b2QueryFilter filter, b2OverlapResultFcn* fcn,
E:\a327ex\Anchor\engine\include\box2d\types.h:1158:/// @see b2World_OverlapABB

313-
314-/// The query filter is used to filter collisions between queries and shapes. For example,
315-/// you may want a ray-cast representing a projectile to hit players and the static environment
316-/// but not debris.
317-/// @ingroup shape
318:typedef struct b2QueryFilter
319-{
320-    /// The collision category bits of this query. Normally you would just set one bit.
321-    uint64_t categoryBits;
322-
323-    /// The collision mask bits. This states the shape categories that this
324-    /// query would accept for collision.
325-    uint64_t maskBits;
326:} b2QueryFilter;
327-
328-/// Use this to initialize your query filter
329-/// @ingroup shape
330:B2_API b2QueryFilter b2DefaultQueryFilter( void );
331-
332-/// Shape type
333-/// @ingroup shape
334-typedef enum b2ShapeType
335-{
--
1156-/// Prototype callback for overlap queries.
1157-/// Called for each shape found in the query.
1158-/// @see b2World_OverlapABB
1159-/// @return false to terminate the query.
1160-/// @ingroup world
1161:typedef bool b2OverlapResultFcn( b2ShapeId shapeId, void* context );
... [5 more lines]

700→    player:release_charged_attack()
   701→end
   702→
   703→if is_released('charge') then
   704→    -- Triggers if player releases before charge completes OR after
   705→end
   706→```
   707→
   708→#### Mouse
   709→
   710→```lua
   711→local x, y = mouse_position()    -- game coordinates (scaled to game resolution)
   712→local dx, dy = mouse_delta()     -- raw pixel movement this frame
   713→local wx, wy = mouse_wheel()     -- scroll wheel delta this frame
   714→
   715→-- Raw mouse button queries
   716→if mouse_is_pressed(1) then end  -- left click just pressed
   717→if mouse_is_down(1) then end     -- left button held
   718→if mouse_is_released(1) then end -- left click just released
   719→-- Button 1 = left, 2 = middle, 3 = right
   720→
   721→mouse_set_visible(false)
   722→mouse_set_grabbed(true)  -- confine to window
   723→```
   724→
   725→#### Keyboard (raw)
   726→
   727→```lua
   728→-- Raw key queries (bypass action system)
   729→if key_is_pressed('space') then end   -- just pressed
... [120 more lines]

940→- [x] Test on Web: all features match Windows
   941→
   942→---
   943→
   944→### Lua API
   945→
   946→```lua
   947→-- Loading
   948→local hit = sound_load('hit.ogg')
   949→local bgm = music_load('bgm.ogg')
   950→
   951→-- Sound playback (fire-and-forget)
   952→sound_play(hit)                                -- volume=1, pitch=1
   953→sound_play(hit, 0.5, 1.2)                      -- volume=0.5, pitch=1.2
   954→sound_play(hit, 1.0, 0.95 + random() * 0.1)   -- random pitch 0.95-1.05
   955→
   956→-- Music (one track at a time)
   957→music_play(bgm)                        -- play once
   958→music_play(bgm, true)                  -- loop
   959→music_stop()
   960→
   961→-- Volume controls (for options menu sliders)
   962→sound_set_volume(0.8)                  -- all sound effects
   963→music_set_volume(0.5)                  -- music
   964→
   965→-- Master pitch (for slow-mo, multiplies with per-play pitch)
   966→audio_set_master_pitch(0.5)            -- all audio plays at half speed/pitch
   967→audio_set_master_pitch(1.0)            -- back to normal
   968→```
   969→
... [170 more lines]

<persisted-output>
Output too large (42.3KB). Full output saved to: C:\Users\adn\.claude\projects\E--a327ex-Anchor\3ab4304c-51be-46ed-aed2-05eb85d548fc\tool-results\toolu_011KYXo6oAUByJAK6Vq78RnW.txt

Preview (first 2KB):
E:\a327ex\Anchor\engine\include\box2d\box2d.h-51-B2_API b2ContactEvents b2World_GetContactEvents( b2WorldId worldId );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-52-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-53-/// Get the joint events for the current time step. The event data is transient. Do not store a reference to this data.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-54-B2_API b2JointEvents b2World_GetJointEvents( b2WorldId worldId );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-55-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-56-/// Overlap test for all shapes that *potentially* overlap the provided AABB
E:\a327ex\Anchor\engine\include\box2d\box2d.h-57-B2_API b2TreeStats b2World_OverlapAABB( b2WorldId worldId, b2AABB aabb, b2QueryFilter filter, b2OverlapResultFcn* fcn,
E:\a327ex\Anchor\engine\include\box2d\box2d.h-58-                                       void* context );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-59-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-60-/// Overlap test for all shapes that overlap the provided shape proxy.
E:\a327ex\Anchor\engine\include\box2d\box2d.h:61:B2_API b2TreeStats b2World_OverlapShape( b2WorldId worldId, const b2ShapeProxy* proxy, b2QueryFilter filter,
E:\a327ex\Anchor\engine\include\box2d\box2d.h-62-                                        b2OverlapResultFcn* fcn, void* context );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-63-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-64-/// Cast a ray into the world to collect shapes in the path of the ray.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-65-/// Your callback function controls whether you get the closest point, any point, or n-points.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-66-/// @note The callback function may receive shapes in any order
E:\a327ex\Anchor\engine\include\box2d\box2d.h-67-/// @param worldId The world to cast the ray against
E:\a327ex\Anchor\engine\include\box2d\box2d.h-68-/// @param origin The start point of the ray
...
</persisted-output>

E:\a327ex\Anchor\engine\include\box2d\collision.h-27-/// Low level ray cast input data
E:\a327ex\Anchor\engine\include\box2d\collision.h-28-typedef struct b2RayCastInput
E:\a327ex\Anchor\engine\include\box2d\collision.h-29-{
E:\a327ex\Anchor\engine\include\box2d\collision.h-30-   /// Start point of the ray cast
E:\a327ex\Anchor\engine\include\box2d\collision.h-31-   b2Vec2 origin;
E:\a327ex\Anchor\engine\include\box2d\collision.h-32-
E:\a327ex\Anchor\engine\include\box2d\collision.h-33-   /// Translation of the ray cast
E:\a327ex\Anchor\engine\include\box2d\collision.h-34-   b2Vec2 translation;
E:\a327ex\Anchor\engine\include\box2d\collision.h-35-
E:\a327ex\Anchor\engine\include\box2d\collision.h-36-   /// The maximum fraction of the translation to consider, typically 1
E:\a327ex\Anchor\engine\include\box2d\collision.h-37-   float maxFraction;
E:\a327ex\Anchor\engine\include\box2d\collision.h-38-} b2RayCastInput;
E:\a327ex\Anchor\engine\include\box2d\collision.h-39-
E:\a327ex\Anchor\engine\include\box2d\collision.h-40-/// A distance proxy is used by the GJK algorithm. It encapsulates any shape.
E:\a327ex\Anchor\engine\include\box2d\collision.h-41-/// You can provide between 1 and B2_MAX_POLYGON_VERTICES and a radius.
E:\a327ex\Anchor\engine\include\box2d\collision.h:42:typedef struct b2ShapeProxy
E:\a327ex\Anchor\engine\include\box2d\collision.h-43-{
E:\a327ex\Anchor\engine\include\box2d\collision.h-44-   /// The point cloud
E:\a327ex\Anchor\engine\include\box2d\collision.h-45-   b2Vec2 points[B2_MAX_POLYGON_VERTICES];
E:\a327ex\Anchor\engine\include\box2d\collision.h-46-
E:\a327ex\Anchor\engine\include\box2d\collision.h-47-   /// The number of points. Must be greater than 0.
E:\a327ex\Anchor\engine\include\box2d\collision.h-48-   int count;
E:\a327ex\Anchor\engine\include\box2d\collision.h-49-
E:\a327ex\Anchor\engine\include\box2d\collision.h-50-   /// The external radius of the point cloud. May be zero.
E:\a327ex\Anchor\engine\include\box2d\collision.h-51-   float radius;
E:\a327ex\Anchor\engine\include\box2d\collision.h-52-} b2ShapeProxy;
E:\a327ex\Anchor\engine\include\box2d\collision.h-53-
E:\a327ex\Anchor\engine\include\box2d\collision.h-54-/// Low level shape cast input in generic form. This allows casting an arbitrary point
E:\a327ex\Anchor\engine\include\box2d\collision.h-55-/// cloud wrap with a radius. For example, a circle is a single point with a non-zero radius.
E:\a327ex\Anchor\engine\include\box2d\collision.h-56-/// A capsule is two points with a non-zero radius. A box is four points with a zero radius.
... [1 more lines]

3810-    return (event_tag_a == query_tag_a && event_tag_b == query_tag_b) ||
3811-           (event_tag_a == query_tag_b && event_tag_b == query_tag_a);
3812-}
3813-
3814-// physics_get_collision_begin(tag_a, tag_b) -> array of {body_a, body_b, shape_a, shape_b}
3815:static int l_physics_get_collision_begin(lua_State* L) {
3816-    const char* tag_a_name = luaL_checkstring(L, 1);
3817-    const char* tag_b_name = luaL_checkstring(L, 2);
3818-
3819-    int tag_a = physics_tag_find(tag_a_name);
3820-    int tag_b = physics_tag_find(tag_b_name);
--
4454-    lua_register(L, "physics_is_awake", l_physics_is_awake);
4455-    lua_register(L, "physics_set_awake", l_physics_set_awake);
4456-    // Physics - Event debugging (Step 8)
4457-    lua_register(L, "physics_debug_events", l_physics_debug_events);
4458-    // Physics - Event queries (Step 9)
4459:    lua_register(L, "physics_get_collision_begin", l_physics_get_collision_begin);
4460-    lua_register(L, "physics_get_collision_end", l_physics_get_collision_end);
4461-    lua_register(L, "physics_get_hit", l_physics_get_hit);
4462-    lua_register(L, "physics_get_sensor_begin", l_physics_get_sensor_begin);
4463-    lua_register(L, "physics_get_sensor_end", l_physics_get_sensor_end);
4464-    // Input - Keyboard

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

163:static b2WorldId physics_world = {0};
303:    b2ContactEvents contact_events = b2World_GetContactEvents(physics_world);
364:    b2SensorEvents sensor_events = b2World_GetSensorEvents(physics_world);
2952:    physics_world = b2CreateWorld(&world_def);
2968:    b2World_SetGravity(physics_world, gravity);
3121:    b2BodyId body_id = b2CreateBody(physics_world, &body_def);
3172:    b2Counters counters = b2World_GetCounters(physics_world);
4850:        b2DestroyWorld(physics_world);
5059:            b2World_Step(physics_world, (float)PHYSICS_RATE, 4);  // 4 sub-steps recommended

[Showing results with pagination = limit: 15, offset: 0]

3121-    b2BodyId body_id = b2CreateBody(physics_world, &body_def);
3122-
3123-    // Return body ID as userdata
3124:    b2BodyId* ud = (b2BodyId*)lua_newuserdata(L, sizeof(b2BodyId));
3125-    *ud = body_id;
3126-
3127-    return 1;
--
3725-        return luaL_error(L, "Invalid shape");
3726-    }
3727-    b2BodyId body_id = b2Shape_GetBody(*shape_id);
3728:    b2BodyId* ud = (b2BodyId*)lua_newuserdata(L, sizeof(b2BodyId));
3729-    *ud = body_id;
3730-    return 1;
3731-}
--
3830-            lua_newtable(L);
3831-
3832-            // body_a
3833:            b2BodyId* body_a_ud = (b2BodyId*)lua_newuserdata(L, sizeof(b2BodyId));
3834-            *body_a_ud = e->body_a;
3835-            lua_setfield(L, -2, "body_a");
3836-
3837-            // body_b
3838:            b2BodyId* body_b_ud = (b2BodyId*)lua_newuserdata(L, sizeof(b2BodyId));
3839-            *body_b_ud = e->body_b;
3840-            lua_setfield(L, -2, "body_b");
3841-
--
3874-            lua_newtable(L);
... [50 more lines]

174-    uint64_t category_bit;    // Single bit identifying this tag (1, 2, 4, 8, ...)
175-    uint64_t collision_mask;  // Which tags this collides with (physical response)
176-    uint64_t sensor_mask;     // Which tags trigger sensor events
177-    uint64_t hit_mask;        // Which tags trigger hit events
178-} PhysicsTag;
179-
180-static PhysicsTag physics_tags[MAX_PHYSICS_TAGS];
181-static int physics_tag_count = 0;
182-
183-// Find tag index by name, returns -1 if not found
184:static int physics_tag_find(const char* name) {
185-    for (int i = 0; i < physics_tag_count; i++) {
186-        if (strcmp(physics_tags[i].name, name) == 0) {
187-            return i;
188-        }
189-    }
190-    return -1;
191-}
192-
193-// Get tag by index (NULL if invalid)
194-static PhysicsTag* physics_tag_get(int index) {
195-    if (index < 0 || index >= physics_tag_count) return NULL;
196-    return &physics_tags[index];
197-}
198-
199-// Get tag by name (NULL if not found)
200-static PhysicsTag* physics_tag_get_by_name(const char* name) {
201:    int index = physics_tag_find(name);
202-    if (index < 0) return NULL;
203-    return &physics_tags[index];
... [145 more lines]

E:\a327ex\Anchor\engine\include\box2d\collision.h-130-/// Polygons have a maximum number of vertices equal to B2_MAX_POLYGON_VERTICES.
E:\a327ex\Anchor\engine\include\box2d\collision.h-131-/// In most cases you should not need many vertices for a convex polygon.
E:\a327ex\Anchor\engine\include\box2d\collision.h-132-/// @warning DO NOT fill this out manually, instead use a helper function like
E:\a327ex\Anchor\engine\include\box2d\collision.h:133:/// b2MakePolygon or b2MakeBox.
E:\a327ex\Anchor\engine\include\box2d\collision.h-134-typedef struct b2Polygon
E:\a327ex\Anchor\engine\include\box2d\collision.h-135-{
E:\a327ex\Anchor\engine\include\box2d\collision.h-136-  /// The polygon vertices
--
E:\a327ex\Anchor\engine\include\box2d\collision.h-182-
E:\a327ex\Anchor\engine\include\box2d\collision.h-183-/// Make a convex polygon from a convex hull. This will assert if the hull is not valid.
E:\a327ex\Anchor\engine\include\box2d\collision.h-184-/// @warning Do not manually fill in the hull data, it must come directly from b2ComputeHull
E:\a327ex\Anchor\engine\include\box2d\collision.h:185:B2_API b2Polygon b2MakePolygon( const b2Hull* hull, float radius );
E:\a327ex\Anchor\engine\include\box2d\collision.h-186-
E:\a327ex\Anchor\engine\include\box2d\collision.h-187-/// Make an offset convex polygon from a convex hull. This will assert if the hull is not valid.
E:\a327ex\Anchor\engine\include\box2d\collision.h-188-/// @warning Do not manually fill in the hull data, it must come directly from b2ComputeHull
--
E:\a327ex\Anchor\engine\include\box2d\collision.h-199-/// Make a box (rectangle) polygon, bypassing the need for a convex hull.
E:\a327ex\Anchor\engine\include\box2d\collision.h-200-/// @param halfWidth the half-width (x-axis)
E:\a327ex\Anchor\engine\include\box2d\collision.h-201-/// @param halfHeight the half-height (y-axis)
E:\a327ex\Anchor\engine\include\box2d\collision.h:202:B2_API b2Polygon b2MakeBox( float halfWidth, float halfHeight );
E:\a327ex\Anchor\engine\include\box2d\collision.h-203-
E:\a327ex\Anchor\engine\include\box2d\collision.h-204-/// Make a rounded box, bypassing the need for a convex hull.
E:\a327ex\Anchor\engine\include\box2d\collision.h-205-/// @param halfWidth the half-width (x-axis)
--
E:\a327ex\Anchor\engine\include\box2d\geometry.c-53-    return center;
E:\a327ex\Anchor\engine\include\box2d\geometry.c-54-}
E:\a327ex\Anchor\engine\include\box2d\geometry.c-55-
E:\a327ex\Anchor\engine\include\box2d\geometry.c:56:b2Polygon b2MakePolygon( const b2Hull* hull, float radius )
E:\a327ex\Anchor\engine\include\box2d\geometry.c-57-{
E:\a327ex\Anchor\engine\include\box2d\geometry.c-58-    B2_ASSERT( b2ValidateHull( hull ) );
... [28 more lines]

<persisted-output>
Output too large (28.9KB). Full output saved to: C:\Users\adn\.claude\projects\E--a327ex-Anchor\3ab4304c-51be-46ed-aed2-05eb85d548fc\tool-results\toolu_01AVToWNmgQa9iX8pQANmsrb.txt

Preview (first 2KB):
E:\a327ex\Anchor\engine\include\box2d\collision.h-423-  b2Vec2 translationB;    ///< The translation of shape B
E:\a327ex\Anchor\engine\include\box2d\collision.h-424-  float maxFraction;      ///< The fraction of the translation to consider, typically 1
E:\a327ex\Anchor\engine\include\box2d\collision.h-425-  bool canEncroach;       ///< Allows shapes with a radius to move slightly closer if already touching
E:\a327ex\Anchor\engine\include\box2d\collision.h-426-} b2ShapeCastPairInput;
E:\a327ex\Anchor\engine\include\box2d\collision.h-427-
E:\a327ex\Anchor\engine\include\box2d\collision.h-428-/// Perform a linear shape cast of shape B moving and shape A fixed. Determines the hit point, normal, and translation fraction.
E:\a327ex\Anchor\engine\include\box2d\collision.h-429-/// Initially touching shapes are treated as a miss.
E:\a327ex\Anchor\engine\include\box2d\collision.h-430-B2_API b2CastOutput b2ShapeCast( const b2ShapeCastPairInput* input );
E:\a327ex\Anchor\engine\include\box2d\collision.h-431-
E:\a327ex\Anchor\engine\include\box2d\collision.h-432-/// Make a proxy for use in overlap, shape cast, and related functions. This is a deep copy of the points.
E:\a327ex\Anchor\engine\include\box2d\collision.h:433:B2_API b2ShapeProxy b2MakeProxy( const b2Vec2* points, int count, float radius );
E:\a327ex\Anchor\engine\include\box2d\collision.h-434-
E:\a327ex\Anchor\engine\include\box2d\collision.h-435-/// Make a proxy with a transform. This is a deep copy of the points.
E:\a327ex\Anchor\engine\include\box2d\collision.h-436-B2_API b2ShapeProxy b2MakeOffsetProxy( const b2Vec2* points, int count, float radius, b2Vec2 position, b2Rot rotation );
E:\a327ex\Anchor\engine\include\box2d\collision.h-437-
E:\a327ex\Anchor\engine\include\box2d\collision.h-438-/// This describes the motion of a body/shape for TOI computation. Shapes are defined with respect to the body origin,
...
</persisted-output>

166:static float pixels_per_meter = 64.0f;  // Default: 64 pixels = 1 meter
356:        ev->point_x = e->point.x * pixels_per_meter;
357:        ev->point_y = e->point.y * pixels_per_meter;
360:        ev->approach_speed = e->approachSpeed * pixels_per_meter;
2967:    b2Vec2 gravity = {gx / pixels_per_meter, gy / pixels_per_meter};
2977:    pixels_per_meter = scale;
3118:    body_def.position = (b2Vec2){x / pixels_per_meter, y / pixels_per_meter};
3149:    lua_pushnumber(L, pos.x * pixels_per_meter);
3150:    lua_pushnumber(L, pos.y * pixels_per_meter);
3237:        .center = { offset_x / pixels_per_meter, offset_y / pixels_per_meter },
3238:        .radius = radius / pixels_per_meter
3297:    float half_w = (width / 2.0f) / pixels_per_meter;
3298:    float half_h = (height / 2.0f) / pixels_per_meter;
3299:    b2Vec2 center = { offset_x / pixels_per_meter, offset_y / pixels_per_meter };
3354:    float half_len = (length / 2.0f) / pixels_per_meter;
3355:    float rad = radius / pixels_per_meter;
3356:    float ox = offset_x / pixels_per_meter;
3357:    float oy = offset_y / pixels_per_meter;
3408:        points[i].x = (float)lua_tonumber(L, -2) / pixels_per_meter;
3409:        points[i].y = (float)lua_tonumber(L, -1) / pixels_per_meter;

[Showing results with pagination = limit: 20, offset: 0]

4030→            // sensor_shape
  4031→            b2ShapeId* sensor_shape_ud = (b2ShapeId*)lua_newuserdata(L, sizeof(b2ShapeId));
  4032→            *sensor_shape_ud = e->sensor_shape;
  4033→            lua_setfield(L, -2, "sensor_shape");
  4034→
  4035→            // visitor_shape
  4036→            b2ShapeId* visitor_shape_ud = (b2ShapeId*)lua_newuserdata(L, sizeof(b2ShapeId));
  4037→            *visitor_shape_ud = e->visitor_shape;
  4038→            lua_setfield(L, -2, "visitor_shape");
  4039→
  4040→            lua_rawseti(L, -2, result_index++);
  4041→        }
  4042→    }
  4043→    return 1;
  4044→}
  4045→
  4046→// Input Lua bindings
  4047→static int l_key_is_down(lua_State* L) {
  4048→    const char* key_name = luaL_checkstring(L, 1);
  4049→    SDL_Scancode scancode = key_name_to_scancode(key_name);
  4050→    if (scancode == SDL_SCANCODE_UNKNOWN) {
  4051→        lua_pushboolean(L, 0);
  4052→    } else {
  4053→        lua_pushboolean(L, keys_current[scancode]);
  4054→    }
  4055→    return 1;
  4056→}
  4057→
  4058→static int l_key_is_pressed(lua_State* L) {
  4059→    const char* key_name = luaL_checkstring(L, 1);
... [50 more lines]

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  4039→
  4040→            lua_rawseti(L, -2, result_index++);
  4041→        }
  4042→    }
  4043→    return 1;
  4044→}
  4045→
  4046→// Spatial query context and callback
  4047→#define MAX_QUERY_RESULTS 256
  4048→typedef struct {
  4049→    b2BodyId bodies[MAX_QUERY_RESULTS];
  4050→    int count;
  4051→    uint64_t tag_mask;  // OR of all queried tag category bits
  4052→} QueryContext;
  4053→
  4054→static bool query_overlap_callback(b2ShapeId shape_id, void* context) {
  4055→    QueryContext* ctx = (QueryContext*)context;
  4056→    if (ctx->count >= MAX_QUERY_RESULTS) return false;  // Stop query
  4057→
  4058→    // Check if this shape's tag matches our query
  4059→    int tag_index = (int)(uintptr_t)b2Shape_GetUserData(shape_id);
  4060→    PhysicsTag* tag = physics_tag_get(tag_index);
  4061→    if (!tag) return true;  // Continue but skip invalid
  4062→
  4063→    // Only include if shape's category matches our query mask
  4064→    if ((tag->category_bit & ctx->tag_mask) == 0) return true;  // Skip, continue
  4065→
  4066→    // Get the body and check for duplicates
  4067→    b2BodyId body = b2Shape_GetBody(shape_id);
... [274 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

4748-    // Physics - Event queries (Step 9)
4749-    lua_register(L, "physics_get_collision_begin", l_physics_get_collision_begin);
4750-    lua_register(L, "physics_get_collision_end", l_physics_get_collision_end);
4751-    lua_register(L, "physics_get_hit", l_physics_get_hit);
4752-    lua_register(L, "physics_get_sensor_begin", l_physics_get_sensor_begin);
4753:    lua_register(L, "physics_get_sensor_end", l_physics_get_sensor_end);
4754-    // Input - Keyboard
4755-    lua_register(L, "key_is_down", l_key_is_down);
4756-    lua_register(L, "key_is_pressed", l_key_is_pressed);
4757-    lua_register(L, "key_is_released", l_key_is_released);
4758-    // Input - Mouse

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  4749→    lua_register(L, "physics_get_collision_begin", l_physics_get_collision_begin);
  4750→    lua_register(L, "physics_get_collision_end", l_physics_get_collision_end);
  4751→    lua_register(L, "physics_get_hit", l_physics_get_hit);
  4752→    lua_register(L, "physics_get_sensor_begin", l_physics_get_sensor_begin);
  4753→    lua_register(L, "physics_get_sensor_end", l_physics_get_sensor_end);
  4754→    // Physics - Spatial queries (Step 10)
  4755→    lua_register(L, "physics_query_point", l_physics_query_point);
  4756→    lua_register(L, "physics_query_circle", l_physics_query_circle);
  4757→    lua_register(L, "physics_query_aabb", l_physics_query_aabb);
  4758→    lua_register(L, "physics_query_box", l_physics_query_box);
  4759→    lua_register(L, "physics_query_capsule", l_physics_query_capsule);
  4760→    lua_register(L, "physics_query_polygon", l_physics_query_polygon);
  4761→    // Input - Keyboard
  4762→    lua_register(L, "key_is_down", l_key_is_down);
  4763→    lua_register(L, "key_is_pressed", l_key_is_pressed);
  4764→    lua_register(L, "key_is_released", l_key_is_released);
  4765→    // Input - Mouse

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

anchor.c
src/anchor.c(459): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1115): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1109): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1501): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1779): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1785): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1895): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1904): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1998): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2000): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2645): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(3001): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

1→print("main.lua loaded - Physics Test (Phase 7 - Step 7: Body Properties)")
     2→
     3→set_shape_filter("rough")
     4→input_bind_all()
     5→
     6→local screen_w, screen_h = 480, 270
     7→
     8→-- Colors (twitter_emoji theme from super emoji box)
     9→local bg_color = rgba(231, 232, 233, 255)
    10→local green = rgba(122, 179, 87, 255)
    11→
    12→-- Layers (bottom to top: background, shadow, outline, game, ui)
    13→local bg_layer = layer_create('background')
    14→local shadow_layer = layer_create('shadow')
    15→local outline_layer = layer_create('outline')
    16→local game_layer = layer_create('game')
    17→local ui_layer = layer_create('ui')  -- No shaders, for overlays like sensor zones
    18→
    19→-- Shaders
    20→local shadow_shader = shader_load_file("shaders/shadow.frag")
    21→local outline_shader = shader_load_file("shaders/outline.frag")
    22→
    23→-- Textures
    24→local smile_tex = texture_load("assets/slight_smile.png")
    25→local smile_size = 20
    26→local smile_scale = smile_size / texture_get_width(smile_tex)
    27→
    28→-- Initialize physics
    29→physics_init()
    30→physics_set_gravity(0, 500)
... [193 more lines]

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→print("main.lua loaded - Physics Test (Phase 7 - Step 10: Spatial Queries)")
     2→
     3→set_shape_filter("rough")
     4→input_bind_all()
     5→

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   174→        end
   175→        print("Normal gravity")
   176→    end
   177→
   178→    -- E: Print event counts (debug)
   179→    if is_pressed('e') then
   180→        physics_debug_events()
   181→    end
   182→
   183→    -- Q: Test spatial query - find all balls in a circle around mouse position
   184→    if is_pressed('q') then
   185→        local mx, my = mouse_position()
   186→        local radius = 50
   187→        local found = physics_query_circle(mx, my, radius, {'ball'})
   188→        print(string.format("Query circle at (%.0f, %.0f) r=%.0f: found %d balls", mx, my, radius, #found))
   189→    end
   190→
   191→    -- R: Test AABB query in the zone area
   192→    if is_pressed('r') then
   193→        local zx, zy = physics_get_position(zone_body)
   194→        local found = physics_query_aabb(zx, zy, 100, 60, {'ball'})
   195→        print(string.format("Query AABB in zone: found %d balls", #found))
   196→    end
   197→
   198→    -- T: Test point query at mouse position
   199→    if is_pressed('t') then
   200→        local mx, my = mouse_position()
   201→        local found = physics_query_point(mx, my, {'ball', 'ground'})
   202→        print(string.format("Query point at (%.0f, %.0f): found %d bodies", mx, my, #found))
... [5 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

E:\a327ex\Anchor\engine\include\box2d\box2d.h-64-/// Cast a ray into the world to collect shapes in the path of the ray.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-65-/// Your callback function controls whether you get the closest point, any point, or n-points.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-66-/// @note The callback function may receive shapes in any order
E:\a327ex\Anchor\engine\include\box2d\box2d.h-67-/// @param worldId The world to cast the ray against
E:\a327ex\Anchor\engine\include\box2d\box2d.h-68-/// @param origin The start point of the ray
E:\a327ex\Anchor\engine\include\box2d\box2d.h-69-/// @param translation The translation of the ray from the start point to the end point
E:\a327ex\Anchor\engine\include\box2d\box2d.h-70-/// @param filter Contains bit flags to filter unwanted shapes from the results
E:\a327ex\Anchor\engine\include\box2d\box2d.h-71-/// @param fcn A user implemented callback function
E:\a327ex\Anchor\engine\include\box2d\box2d.h-72-/// @param context A user context that is passed along to the callback function
E:\a327ex\Anchor\engine\include\box2d\box2d.h-73-///    @return traversal performance counters
E:\a327ex\Anchor\engine\include\box2d\box2d.h:74:B2_API b2TreeStats b2World_CastRay( b2WorldId worldId, b2Vec2 origin, b2Vec2 translation, b2QueryFilter filter,
E:\a327ex\Anchor\engine\include\box2d\box2d.h-75-                                   b2CastResultFcn* fcn, void* context );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-76-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-77-/// Cast a ray into the world to collect the closest hit. This is a convenience function. Ignores initial overlap.
E:\a327ex\Anchor\engine\include\box2d\box2d.h:78:/// This is less general than b2World_CastRay() and does not allow for custom filtering.
E:\a327ex\Anchor\engine\include\box2d\box2d.h:79:B2_API b2RayResult b2World_CastRayClosest( b2WorldId worldId, b2Vec2 origin, b2Vec2 translation, b2QueryFilter filter );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-80-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-81-/// Cast a shape through the world. Similar to a cast ray except that a shape is cast instead of a point.
E:\a327ex\Anchor\engine\include\box2d\box2d.h:82:///    @see b2World_CastRay
E:\a327ex\Anchor\engine\include\box2d\box2d.h-83-B2_API b2TreeStats b2World_CastShape( b2WorldId worldId, const b2ShapeProxy* proxy, b2Vec2 translation, b2QueryFilter filter,
E:\a327ex\Anchor\engine\include\box2d\box2d.h-84-                                     b2CastResultFcn* fcn, void* context );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-85-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-86-/// Cast a capsule mover through the world. This is a special shape cast that handles sliding along other shapes while reducing
E:\a327ex\Anchor\engine\include\box2d\box2d.h-87-/// clipping.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-88-B2_API float b2World_CastMover( b2WorldId worldId, const b2Capsule* mover, b2Vec2 translation, b2QueryFilter filter );
E:\a327ex\Anchor\engine\include\box2d\box2d.h-89-
E:\a327ex\Anchor\engine\include\box2d\box2d.h-90-/// Collide a capsule mover with the world, gathering collision planes that can be fed to b2SolvePlanes. Useful for
E:\a327ex\Anchor\engine\include\box2d\box2d.h-91-/// kinematic character movement.
E:\a327ex\Anchor\engine\include\box2d\box2d.h-92-B2_API void b2World_CollideMover( b2WorldId worldId, const b2Capsule* mover, b2QueryFilter filter, b2PlaneResultFcn* fcn,
--
... [87 more lines]

E:\a327ex\Anchor\engine\include\box2d\types.h-52-/// Optional friction mixing callback. This intentionally provides no context objects because this is called
E:\a327ex\Anchor\engine\include\box2d\types.h-53-/// from a worker thread.
E:\a327ex\Anchor\engine\include\box2d\types.h-54-/// @warning This function should not attempt to modify Box2D state or user application state.
E:\a327ex\Anchor\engine\include\box2d\types.h-55-/// @ingroup world
E:\a327ex\Anchor\engine\include\box2d\types.h-56-typedef float b2FrictionCallback( float frictionA, uint64_t userMaterialIdA, float frictionB, uint64_t userMaterialIdB );
E:\a327ex\Anchor\engine\include\box2d\types.h-57-
E:\a327ex\Anchor\engine\include\box2d\types.h-58-/// Optional restitution mixing callback. This intentionally provides no context objects because this is called
E:\a327ex\Anchor\engine\include\box2d\types.h-59-/// from a worker thread.
E:\a327ex\Anchor\engine\include\box2d\types.h-60-/// @warning This function should not attempt to modify Box2D state or user application state.
E:\a327ex\Anchor\engine\include\box2d\types.h-61-/// @ingroup world
E:\a327ex\Anchor\engine\include\box2d\types.h-62-typedef float b2RestitutionCallback( float restitutionA, uint64_t userMaterialIdA, float restitutionB, uint64_t userMaterialIdB );
E:\a327ex\Anchor\engine\include\box2d\types.h-63-
E:\a327ex\Anchor\engine\include\box2d\types.h-64-/// Result from b2World_RayCastClosest
E:\a327ex\Anchor\engine\include\box2d\types.h-65-/// If there is initial overlap the fraction and normal will be zero while the point is an arbitrary point in the overlap region.
E:\a327ex\Anchor\engine\include\box2d\types.h-66-/// @ingroup world
E:\a327ex\Anchor\engine\include\box2d\types.h:67:typedef struct b2RayResult
E:\a327ex\Anchor\engine\include\box2d\types.h-68-{
E:\a327ex\Anchor\engine\include\box2d\types.h-69-   b2ShapeId shapeId;
E:\a327ex\Anchor\engine\include\box2d\types.h-70-   b2Vec2 point;
E:\a327ex\Anchor\engine\include\box2d\types.h-71-   b2Vec2 normal;
E:\a327ex\Anchor\engine\include\box2d\types.h-72-   float fraction;
E:\a327ex\Anchor\engine\include\box2d\types.h-73-   int nodeVisits;
E:\a327ex\Anchor\engine\include\box2d\types.h-74-   int leafVisits;
E:\a327ex\Anchor\engine\include\box2d\types.h-75-   bool hit;
E:\a327ex\Anchor\engine\include\box2d\types.h-76-} b2RayResult;
E:\a327ex\Anchor\engine\include\box2d\types.h-77-
E:\a327ex\Anchor\engine\include\box2d\types.h-78-/// World definition used to create a simulation world.
E:\a327ex\Anchor\engine\include\box2d\types.h-79-/// Must be initialized using b2DefaultWorldDef().
E:\a327ex\Anchor\engine\include\box2d\types.h-80-/// @ingroup world
E:\a327ex\Anchor\engine\include\box2d\types.h-81-typedef struct b2WorldDef
... [1 more lines]

4325→    b2World_OverlapShape(physics_world, &proxy, filter, query_overlap_callback, &ctx);
  4326→
  4327→    lua_newtable(L);
  4328→    for (int i = 0; i < ctx.count; i++) {
  4329→        b2BodyId* ud = (b2BodyId*)lua_newuserdata(L, sizeof(b2BodyId));
  4330→        *ud = ctx.bodies[i];
  4331→        lua_rawseti(L, -2, i + 1);
  4332→    }
  4333→    return 1;
  4334→}
  4335→
  4336→// Input Lua bindings
  4337→static int l_key_is_down(lua_State* L) {
  4338→    const char* key_name = luaL_checkstring(L, 1);
  4339→    SDL_Scancode scancode = key_name_to_scancode(key_name);
  4340→    if (scancode == SDL_SCANCODE_UNKNOWN) {
  4341→        lua_pushboolean(L, 0);
  4342→    } else {
  4343→        lua_pushboolean(L, keys_current[scancode]);
  4344→    }

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  4329→        b2BodyId* ud = (b2BodyId*)lua_newuserdata(L, sizeof(b2BodyId));
  4330→        *ud = ctx.bodies[i];
  4331→        lua_rawseti(L, -2, i + 1);
  4332→    }
  4333→    return 1;
  4334→}
  4335→
  4336→// Raycast context for collecting all hits
  4337→typedef struct {
  4338→    b2ShapeId shapes[MAX_QUERY_RESULTS];
  4339→    b2Vec2 points[MAX_QUERY_RESULTS];
  4340→    b2Vec2 normals[MAX_QUERY_RESULTS];
  4341→    float fractions[MAX_QUERY_RESULTS];
  4342→    int count;
  4343→    uint64_t tag_mask;
  4344→} RaycastContext;
  4345→
  4346→static float raycast_all_callback(b2ShapeId shape_id, b2Vec2 point, b2Vec2 normal, float fraction, void* context) {
  4347→    RaycastContext* ctx = (RaycastContext*)context;
  4348→    if (ctx->count >= MAX_QUERY_RESULTS) return 0.0f;  // Stop
  4349→
  4350→    // Check if this shape's tag matches our query
  4351→    int tag_index = (int)(uintptr_t)b2Shape_GetUserData(shape_id);
  4352→    PhysicsTag* tag = physics_tag_get(tag_index);
  4353→    if (!tag) return 1.0f;  // Continue
  4354→
  4355→    if ((tag->category_bit & ctx->tag_mask) == 0) return 1.0f;  // Skip, continue
  4356→
  4357→    ctx->shapes[ctx->count] = shape_id;
... [151 more lines]

4917-    lua_register(L, "physics_query_aabb", l_physics_query_aabb);
4918-    lua_register(L, "physics_query_box", l_physics_query_box);
4919-    lua_register(L, "physics_query_capsule", l_physics_query_capsule);
4920:    lua_register(L, "physics_query_polygon", l_physics_query_polygon);
4921-    // Input - Keyboard
4922-    lua_register(L, "key_is_down", l_key_is_down);
4923-    lua_register(L, "key_is_pressed", l_key_is_pressed);

The file E:\a327ex\Anchor\engine\src\anchor.c has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  4916→    lua_register(L, "physics_query_circle", l_physics_query_circle);
  4917→    lua_register(L, "physics_query_aabb", l_physics_query_aabb);
  4918→    lua_register(L, "physics_query_box", l_physics_query_box);
  4919→    lua_register(L, "physics_query_capsule", l_physics_query_capsule);
  4920→    lua_register(L, "physics_query_polygon", l_physics_query_polygon);
  4921→    lua_register(L, "physics_raycast", l_physics_raycast);
  4922→    lua_register(L, "physics_raycast_all", l_physics_raycast_all);
  4923→    // Input - Keyboard
  4924→    lua_register(L, "key_is_down", l_key_is_down);
  4925→    lua_register(L, "key_is_pressed", l_key_is_pressed);
  4926→    lua_register(L, "key_is_released", l_key_is_released);
  4927→    // Input - Mouse

anchor.c
src/anchor.c(459): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1115): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1109): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
src/anchor.c(1501): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1779): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1785): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1895): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1904): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(1998): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2000): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
src/anchor.c(2645): warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _strdup. See online help for details.
src/anchor.c(3001): warning C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
gl.c
Generating Code...
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
Build successful: build/anchor.exe

The file E:\a327ex\Anchor\test\main.lua has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   194→        local found = physics_query_aabb(zx, zy, 100, 60, {'ball'})
   195→        print(string.format("Query AABB in zone: found %d balls", #found))
   196→    end
   197→
   198→    -- T: Test point query at mouse position
   199→    if is_pressed('t') then
   200→        local mx, my = mouse_position()
   201→        local found = physics_query_point(mx, my, {'ball', 'ground'})
   202→        print(string.format("Query point at (%.0f, %.0f): found %d bodies", mx, my, #found))
   203→    end
   204→
   205→    -- Y: Test raycast from top-left to mouse position
   206→    if is_pressed('y') then
   207→        local mx, my = mouse_position()
   208→        local hit = physics_raycast(0, 0, mx, my, {'ball', 'ground'})
   209→        if hit then
   210→            print(string.format("Raycast hit at (%.1f, %.1f), normal=(%.2f, %.2f), fraction=%.3f",
   211→                hit.point_x, hit.point_y, hit.normal_x, hit.normal_y, hit.fraction))
   212→        else
   213→            print("Raycast: no hit")
   214→        end
   215→    end
   216→
   217→    -- U: Test raycast_all from left edge to right edge at mouse Y
   218→    if is_pressed('u') then
   219→        local mx, my = mouse_position()
   220→        local hits = physics_raycast_all(0, my, screen_w, my, {'ball', 'ground'})
   221→        print(string.format("Raycast_all at y=%.0f: %d hits", my, #hits))
   222→        for i, hit in ipairs(hits) do
... [7 more lines]

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

1088→  - `physics_shape_get_body(shape)` → body
  1089→  - `physics_shape_is_valid(shape)` → bool
  1090→
  1091→**Step 8: Event buffering**
  1092→- [ ] After `b2World_Step()`, retrieve events:
  1093→  - `b2World_GetContactEvents()` — collision begin/end, hit
  1094→  - `b2World_GetSensorEvents()` — sensor begin/end
  1095→- [ ] Buffer events in C arrays, keyed by tag pair for fast lookup
  1096→- [ ] Validate shape IDs with `b2Shape_IsValid()` before storing
  1097→- [ ] Clear event buffers at start of each frame
  1098→
  1099→**Step 9: Event queries (Lua bindings)**
  1100→- [ ] `physics_get_collision_begin(tag_a, tag_b)` → array of `{body_a, body_b, shape_a, shape_b}`
  1101→- [ ] `physics_get_collision_end(tag_a, tag_b)` → array of `{body_a, body_b, shape_a, shape_b}`
  1102→- [ ] `physics_get_hit(tag_a, tag_b)` → array of `{body_a, body_b, point_x, point_y, normal_x, normal_y, approach_speed}`
  1103→- [ ] `physics_get_sensor_begin(tag_a, tag_b)` → array of `{body_a, body_b, shape_a, shape_b}`
  1104→- [ ] `physics_get_sensor_end(tag_a, tag_b)` → array of `{body_a, body_b, shape_a, shape_b}`
  1105→- [ ] `physics_get_sensor_overlaps(shape)` → array of shapes currently overlapping
  1106→
  1107→**Step 10: Spatial queries (overlap)**
  1108→- [ ] Build `b2QueryFilter` from tag array (OR together category bits)
  1109→- [ ] `physics_query_point(x, y, tags)` → array of bodies
  1110→- [ ] `physics_query_circle(x, y, radius, tags)` → array of bodies
  1111→- [ ] `physics_query_aabb(x, y, w, h, tags)` → array of bodies
  1112→- [ ] `physics_query_box(x, y, w, h, angle, tags)` → array of bodies (rotated)
  1113→- [ ] `physics_query_capsule(x1, y1, x2, y2, radius, tags)` → array of bodies
  1114→- [ ] `physics_query_polygon(x, y, vertices, tags)` → array of bodies
  1115→
  1116→**Step 11: Spatial queries (casts)**
  1117→- [ ] Hit result structure: `{body, shape, point_x, point_y, normal_x, normal_y, fraction}`
... [120 more lines]

The file E:\a327ex\Anchor\docs\ANCHOR_IMPLEMENTATION_PLAN.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1087→  - `physics_shape_get_density(shape)` → density
  1088→  - `physics_shape_get_body(shape)` → body
  1089→  - `physics_shape_is_valid(shape)` → bool
  1090→
  1091→**Step 8: Event buffering**
  1092→- [x] After `b2World_Step()`, retrieve events:
  1093→  - `b2World_GetContactEvents()` — collision begin/end, hit
  1094→  - `b2World_GetSensorEvents()` — sensor begin/end
  1095→- [x] Buffer events in C arrays (up to 256 per type), store tag indices for fast lookup
  1096→- [x] Store body and shape IDs in events
  1097→- [x] Clear event buffers at start of each physics step
  1098→- [x] `physics_debug_events()` — print event counts for debugging
  1099→
  1100→**Step 9: Event queries (Lua bindings)**
  1101→- [x] `physics_get_collision_begin(tag_a, tag_b)` → array of `{body_a, body_b, shape_a, shape_b}`
  1102→- [x] `physics_get_collision_end(tag_a, tag_b)` → array of `{body_a, body_b, shape_a, shape_b}`
  1103→- [x] `physics_get_hit(tag_a, tag_b)` → array of `{body_a, body_b, shape_a, shape_b, point_x, point_y, normal_x, normal_y, approach_speed}`
  1104→- [x] `physics_get_sensor_begin(tag_a, tag_b)` → array of `{sensor_body, visitor_body, sensor_shape, visitor_shape}`
  1105→- [x] `physics_get_sensor_end(tag_a, tag_b)` → array of `{sensor_body, visitor_body, sensor_shape, visitor_shape}`
  1106→
  1107→**Step 10: Spatial queries and raycast**
  1108→- [x] Build `b2QueryFilter` from tag array (OR together category bits)
  1109→- [x] `physics_query_point(x, y, tags)` → array of bodies
  1110→- [x] `physics_query_circle(x, y, radius, tags)` → array of bodies
  1111→- [x] `physics_query_aabb(x, y, w, h, tags)` → array of bodies
  1112→- [x] `physics_query_box(x, y, w, h, angle, tags)` → array of bodies (rotated)
  1113→- [x] `physics_query_capsule(x1, y1, x2, y2, radius, tags)` → array of bodies
  1114→- [x] `physics_query_polygon(x, y, vertices, tags)` → array of bodies (convex, max 8 vertices)
  1115→- [x] `physics_raycast(x1, y1, x2, y2, tags)` → `{body, shape, point_x, point_y, normal_x, normal_y, fraction}` or nil
... [5 more lines]

The file E:\a327ex\Anchor\docs\ANCHOR_IMPLEMENTATION_PLAN.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1168→```
  1169→
  1170→---
  1171→
  1172→### Verification
  1173→
  1174→- [x] Step 1: Box2D compiles on Windows and Web
  1175→- [x] Step 2: World steps, gravity works (bodies fall)
  1176→- [x] Step 3-4: Tags registered, collision filtering works
  1177→- [x] Step 5-6: Bodies and shapes created, collisions occur
  1178→- [x] Step 7: Position, velocity, forces work correctly
  1179→- [x] Step 8-9: Events fire and can be queried from Lua
  1180→- [x] Step 10: Overlap queries and raycast return correct results
  1181→- [ ] All steps verified on Web (Windows verified)
  1182→
  1183→**Deliverable:** Full physics with tag-based collision, events, and spatial queries. ✓ Complete (Windows)
  1184→
  1185→---
  1186→
  1187→## Phase 8: Random

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

93→- [x] Verify OpenGL context on Windows
    94→
    95→### 1.3 Main Loop
    96→- [x] Decoupled timestep: 120Hz physics/input, 60Hz rendering
    97→- [x] Delta time accumulator pattern (separate accumulators for physics and rendering)
    98→- [x] Event polling once per frame iteration (before physics loop)
    99→- [x] Clean shutdown
   100→
   101→### 1.4 Lua Integration
   102→- [x] Initialize Lua state
   103→- [x] Load and run external `.lua` file (command-line argument, like LÖVE)
   104→- [x] Protected call wrapper with stack trace (luaL_traceback)
   105→- [x] Error state: red screen, error message stored, window stays open
   106→
   107→### 1.5 Windowing
   108→- [x] Fullscreen toggle (Alt+Enter or F11)
   109→- [x] Aspect-ratio scaling with letterboxing (fills window, black bars when needed)
   110→- [x] Framebuffer at native game resolution (480×270)
   111→- [x] Handle window resize events
   112→

The file E:\a327ex\Anchor\docs\ANCHOR_IMPLEMENTATION_PLAN.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    91→- [x] Basic shader compilation (vertex + fragment)
    92→- [x] Clear screen to solid color
    93→- [x] Verify OpenGL context on Windows
    94→
    95→### 1.3 Main Loop
    96→- [x] Decoupled timestep: 120Hz physics/input, 60Hz rendering
    97→- [x] Delta time accumulator pattern (separate accumulators for physics and rendering)
    98→- [x] Delta time averaging (4-frame ring buffer) to smooth OS scheduling jitter
    99→- [x] Event polling once per frame iteration (before physics loop)
   100→- [x] Clean shutdown
   101→
   102→### 1.4 Lua Integration
   103→- [x] Initialize Lua state
   104→- [x] Load and run external `.lua` file (command-line argument, like LÖVE)

Building with game folder: ../test
Build successful: build-web/anchor.html
To test: cd build-web && python -m http.server 8000
Then open: http://localhost:8000/anchor.html
In file included from src/anchor.c:5936:
include\stb_vorbis.c:1404:75: warning: pointer comparison always evaluates to false [-Wtautological-compare]
 1404 |       if (f->stream_start + loc >= f->stream_end || f->stream_start + loc < f->stream_start) {
      |                                                                           ^
1 warning generated.

The file E:\a327ex\Anchor\docs\ANCHOR_IMPLEMENTATION_PLAN.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1177→- [x] Step 3-4: Tags registered, collision filtering works
  1178→- [x] Step 5-6: Bodies and shapes created, collisions occur
  1179→- [x] Step 7: Position, velocity, forces work correctly
  1180→- [x] Step 8-9: Events fire and can be queried from Lua
  1181→- [x] Step 10: Overlap queries and raycast return correct results
  1182→- [x] All steps verified on Windows and Web
  1183→
  1184→**Deliverable:** Full physics with tag-based collision, events, and spatial queries. ✓ Complete
  1185→
  1186→---
  1187→
  1188→## Phase 8: Random

4851:    lua_register(L, "physics_init", l_physics_init);
4852:    lua_register(L, "physics_set_gravity", l_physics_set_gravity);
4853:    lua_register(L, "physics_set_meter_scale", l_physics_set_meter_scale);
4854:    lua_register(L, "physics_set_enabled", l_physics_set_enabled);
4855:    lua_register(L, "physics_register_tag", l_physics_register_tag);
4856:    lua_register(L, "physics_enable_collision", l_physics_enable_collision);
4857:    lua_register(L, "physics_disable_collision", l_physics_disable_collision);
4858:    lua_register(L, "physics_enable_sensor", l_physics_enable_sensor);
4859:    lua_register(L, "physics_enable_hit", l_physics_enable_hit);
4860:    lua_register(L, "physics_tags_collide", l_physics_tags_collide);
4861:    lua_register(L, "physics_create_body", l_physics_create_body);
4862:    lua_register(L, "physics_destroy_body", l_physics_destroy_body);
4863:    lua_register(L, "physics_get_position", l_physics_get_position);
4864:    lua_register(L, "physics_get_angle", l_physics_get_angle);
4865:    lua_register(L, "physics_get_body_count", l_physics_get_body_count);
4866:    lua_register(L, "physics_body_is_valid", l_physics_body_is_valid);
4867:    lua_register(L, "physics_add_circle", l_physics_add_circle);
4868:    lua_register(L, "physics_add_box", l_physics_add_box);
4869:    lua_register(L, "physics_add_capsule", l_physics_add_capsule);
4870:    lua_register(L, "physics_add_polygon", l_physics_add_polygon);
4872:    lua_register(L, "physics_set_position", l_physics_set_position);
4873:    lua_register(L, "physics_set_angle", l_physics_set_angle);
4874:    lua_register(L, "physics_set_transform", l_physics_set_transform);
4875:    lua_register(L, "physics_get_velocity", l_physics_get_velocity);
4876:    lua_register(L, "physics_get_angular_velocity", l_physics_get_angular_velocity);
4877:    lua_register(L, "physics_set_velocity", l_physics_set_velocity);
4878:    lua_register(L, "physics_set_angular_velocity", l_physics_set_angular_velocity);
4879:    lua_register(L, "physics_apply_force", l_physics_apply_force);
4880:    lua_register(L, "physics_apply_force_at", l_physics_apply_force_at);
4881:    lua_register(L, "physics_apply_impulse", l_physics_apply_impulse);
... [36 more lines]

1118→
  1119→---
  1120→
  1121→### Lua API Summary
  1122→
  1123→```lua
  1124→-- World setup
  1125→physics_init()
  1126→physics_set_gravity(0, 500)
  1127→physics_set_meter_scale(64)
  1128→physics_set_enabled(true)
  1129→
  1130→-- Tag system
  1131→physics_register_tag('player')
  1132→physics_register_tag('enemy')
  1133→physics_enable_collision('player', 'enemy')
  1134→physics_enable_sensor('player', 'pickup')
  1135→physics_enable_hit('ball', 'wall')
  1136→physics_disable_collision('player', 'player_bullet')
  1137→
  1138→-- Body/shape creation
  1139→local body = physics_create_body('dynamic', 100, 100)
  1140→local shape = physics_add_circle(body, 'player', 16)
  1141→local sensor = physics_add_circle(body, 'feet', 8, {sensor = true, offset_y = 16})
  1142→physics_destroy_body(body)
  1143→
  1144→-- Body properties
  1145→local x, y = physics_get_position(body)
  1146→physics_set_velocity(body, 100, 0)
  1147→physics_apply_impulse(body, 50, -100)
... [25 more lines]

The file E:\a327ex\Anchor\docs\ANCHOR_IMPLEMENTATION_PLAN.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1117→- [x] `physics_raycast_all(x1, y1, x2, y2, tags)` → array of hits
  1118→
  1119→---
  1120→
  1121→### Lua API Summary
  1122→
  1123→```lua
  1124→-- World setup
  1125→physics_init()
  1126→physics_set_gravity(gx, gy)
  1127→physics_set_meter_scale(scale)           -- Default 64 pixels per meter
  1128→physics_set_enabled(bool)
  1129→
  1130→-- Tag system (max 64 tags)
  1131→physics_register_tag(name)
  1132→physics_enable_collision(tag_a, tag_b)   -- Physical collision response
  1133→physics_disable_collision(tag_a, tag_b)
  1134→physics_enable_sensor(tag_a, tag_b)      -- Sensor events (no physical response)
  1135→physics_enable_hit(tag_a, tag_b)         -- Hit events with contact info
  1136→physics_tags_collide(tag_a, tag_b)       -- Query if tags collide
  1137→
  1138→-- Body creation/destruction
  1139→local body = physics_create_body(type, x, y)  -- type: 'static', 'dynamic', 'kinematic'
  1140→physics_destroy_body(body)
  1141→physics_get_body_count()
  1142→physics_body_is_valid(body)
  1143→
  1144→-- Shape creation (returns shape userdata)
  1145→physics_add_circle(body, tag, radius, [opts])
... [75 more lines]

The file E:\a327ex\Anchor\docs\ANCHOR_IMPLEMENTATION_PLAN.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1209→physics_query_box(x, y, w, h, angle, tags)
  1210→physics_query_capsule(x1, y1, x2, y2, radius, tags)
  1211→physics_query_polygon(x, y, vertices, tags)
  1212→
  1213→-- Raycast
  1214→physics_raycast(x1, y1, x2, y2, tags)      -- Returns {body, shape, point_x, point_y, normal_x, normal_y, fraction} or nil
  1215→physics_raycast_all(x1, y1, x2, y2, tags)  -- Returns array of hits
  1216→```
  1217→
  1218→#### Usage Examples
  1219→
  1220→```lua
  1221→-- Shape creation with options
  1222→local body = physics_create_body('dynamic', 100, 100)
  1223→local main_shape = physics_add_circle(body, 'player', 16)
  1224→local feet_sensor = physics_add_circle(body, 'feet', 8, {
  1225→    sensor = true,
  1226→    offset_y = 16  -- Below the main shape
  1227→})
  1228→local rotated_box = physics_add_box(body, 'hitbox', 32, 16, {
  1229→    offset_x = 20,
  1230→    angle = 0.5  -- Radians
  1231→})
  1232→
  1233→-- Polygon shape (convex, max 8 vertices, relative to body center)
  1234→local vertices = {{-10, -10}, {10, -10}, {15, 0}, {10, 10}, {-10, 10}}
  1235→local poly_shape = physics_add_polygon(body, 'custom', vertices)
  1236→
  1237→-- Collision events
... [50 more lines]

/c/Users/adn/.claude/projects/E--a327ex-Anchor/3ab4304c-51be-46ed-aed2-05eb85d548fc.jsonl

<tool_use_error>File content (13.6MB) exceeds maximum allowed size (256KB). Please use offset and limit parameters to read specific portions of the file, or use the GrepTool to search for specific content.</tool_use_error>

1→# Session Workflow
     2→
     3→When the user asks to end the session, follow this workflow. Complete all steps before committing (one commit per session).
     4→
     5→See the Commands section in `.claude/CLAUDE.md` for quick reference.
     6→
     7→---
     8→
     9→## End of Session Steps
    10→
    11→1. **Locate the session transcript** — find the most recent JSONL file
    12→2. **Convert to Markdown** — use a lowercase, hyphenated title slug (e.g., `engine-phase-1.md`). Date-based filenames don't work with Blot.
    13→3. **Read the converted log** to review the full session, especially if compacted. Summary must cover everything.
    14→4. **Write a detailed summary:**
    15→   - Chronological order (matching conversation flow)
    16→   - Weight to one-off fixes, attempts, problems solved
    17→   - Specific details: error messages, what was tried, what worked
    18→5. **Create a short title** (max 30 characters)
    19→6. **Show title + summary to user** — wait for approval before proceeding
    20→7. **Prepend title + summary** to the log file (replace default header)
    21→8. **Sync context files**
    22→9. **Commit** with title as subject, full summary as body:
    23→
    24→   **CRITICAL:** Copy summary text directly from the log file. Do not retype. The commit body must be character-for-character identical to the log file.
    25→
    26→   ```bash
    27→   git commit -m "Title
    28→
    29→   [COPY-PASTE exact summary from log file]
    30→
... [89 more lines]