Collision Handler

Centralized collision detection and response system that manages interactions between vehicles, track elements, and environmental objects.

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🎯 Core Responsibilities

Function	Description
Vehicle-Track Collisions	Handles cars going off-track
Effect Object Interactions	Manages special track objects
Vehicle-Vehicle Collisions	Processes car-to-car impacts
Collision Visualization	Provides debug rendering

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🛠️ Static Methods

handleEffectObjectsCollisions(gameScene: GameScene)

Processes interactions between vehicles and effect objects (puddles, obstacles, etc.)

Flow:

graph TD
    A[Get all effect objects] --> B[Check player collision]
    B --> C[Check opponent collisions]
    C --> D[Update effect objects]
    D --> E[Trigger effect callbacks]

Parameters:

• gameScene: Reference to the current game state

Key Logic:

• Uses getCarCorners for precise collision detection
• Skips vehicles with noCollision flag
• Aggregates all colliding vehicles before updating effects

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handleCollisionChecks(gameScene: GameScene, deltaTime: number)

Manages vehicle collisions with track boundaries.

Parameters:

Name	Type	Description
gameScene	GameScene	Current game state
deltaTime	number	Frame time for physics

Behavior:

1. Checks player against track collider
2. Visualizes collision points (debug)
3. Applies physics responses via physicsDriver
4. Processes all opponents similarly

Visual Feedback:

• Calls displayCollisionEffect() on impact
• Shows collider corners in debug mode

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handleCollisionsBetweenControllers(gameScene: GameScene)

Handles vehicle-to-vehicle collisions.

Collision Matrix:

Check Type	Description
Player vs Opponent	Primary race collisions
Opponent vs Opponent	AI traffic management

Optimizations:

• Skips noCollision flagged vehicles
• Avoids duplicate checks (A vs B == B vs A)
• Uses efficient pairwise comparison

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🧩 Implementation Details

Collision Detection

// Typical detection call
const isColliding = collisionManager.isCollidingWithAnotherObject(
  getCarCorners(position, height, width, angle),
  targetCollision
);

Physics Response

physicsDriver.handleCollision(
  vehicle,
  collisionNormal,
  trackCollider,
  deltaTime
);

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🏎️ Usage Example

// Game loop integration
function updatePhysics(deltaTime: number) {
  CollisionHandlers.handleEffectObjectsCollisions(gameScene);
  CollisionHandlers.handleCollisionChecks(gameScene, deltaTime);
  CollisionHandlers.handleCollisionsBetweenControllers(gameScene);
}


## 🛡️ Error Handling

**Safety Checks**:
- Null checks for `playerController`
- Track collider validation
- Skip logic for `noCollision` vehicles

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## 📊 Debugging Features

| Feature | Method | Description |
|---------|--------|-------------|
| Collider Visualization | `displayColliderCorners()` | Shows hitboxes |
| Impact Effects | `displayCollisionEffect()` | Visual feedback |

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## 🧠 Design Considerations

### Single Responsibility
Each handler method focuses on one collision type:
1. Effect objects
2. Track boundaries
3. Inter-vehicle

### Frame Consistency
- All collisions processed in single frame
- Uses same physics timestep

### Extensibility
Easy to add new collision types by adding handler methods

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## ⚙️ Performance Tips

1. **Object Pooling**:
   - Reuse collision detection objects

2. **Early Outs**:
   - Check distance before precise collision

3. **Spatial Partitioning**:
   - Implement grid/quadtree for opponents

4. **LOD Colliders**:
   - Simplified colliders for distant objects