https://sassou-nguesso.com/src/utils/PhysicsHelper.js

1// Simple physics body configuration helper
2import { Config } from './Config.js';
3
4export function configurePhysicsBody(sprite, entityType) {
5  const physicsConfig = Config.get(`${entityType}.physics`);
6
7  if (!physicsConfig || !sprite.body) {
8    return; // Use default Phaser collision
9  }
10
11  const { alignBottom } = physicsConfig;
12
13  // Get collision size from config (simplified structure)
14  let bodyWidth, bodyHeight;
15
16  // Handle absolute pixel sizes with aspect ratio preservation
17  if (physicsConfig.width && physicsConfig.height) {
18    // Both specified - use exact values
19    bodyWidth = physicsConfig.width;
20    bodyHeight = physicsConfig.height;
21  } else if (physicsConfig.width) {
22    // Only width specified - preserve sprite aspect ratio
23    const aspectRatio = sprite.height / sprite.width;
24    bodyWidth = physicsConfig.width;
25    bodyHeight = physicsConfig.width * aspectRatio;
26  } else if (physicsConfig.height) {
27    // Only height specified - preserve sprite aspect ratio
28    const aspectRatio = sprite.width / sprite.height;
29    bodyHeight = physicsConfig.height;
30    bodyWidth = physicsConfig.height * aspectRatio;
31  } else {
32    return; // No size specified, use default
33  }
34
35  // Calculate offset relative to original sprite frame
36  const scaleX = sprite.scaleX;
37  const scaleY = sprite.scaleY;
38  // Phaser physics body offsets are in original texture coordinates, not scaled display coordinates.
39  // We need to work backwards from the scaled size to get the correct offset.
40  let offsetX = (sprite.width - bodyWidth / scaleX) / 2;
41  let offsetY = alignBottom
42    ? sprite.height - bodyHeight / scaleY // Bottom-aligned (feet on ground)
43    : (sprite.height - bodyHeight / scaleY) / 2; // Center-aligned
44  // Apply the collision settings
45  sprite.body.setSize(bodyWidth / scaleX, bodyHeight / scaleY);
46  sprite.body.setOffset(offsetX, offsetY);
47
48  // Physics configuration applied successfully
49}