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Fix coordinate system to use rink center instead of canvas center

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When the pause button was added below the rink, it increased the canvas
height (RINK_HEIGHT + UI_BOTTOM_PADDING). The coordinate conversion was
incorrectly using the full canvas center (including UI padding) instead
of just the rink center, causing y=0 to shift 30 pixels below the actual
center of the rink.

Now CoordinateUtils.gameToScreen/screenToGame correctly use RINK_WIDTH
for centerY calculation, ensuring y=0 is always at the rink center
regardless of UI elements.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Pierre Wessman 2025-10-03 13:11:59 +02:00
parent 43ff271582
commit 1aa18376d5
1 changed files with 5 additions and 3 deletions
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8
src/utils/coordinates.ts
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@ -1,5 +1,5 @@
import Phaser from 'phaser';
import { SCALE } from '../config/constants';
import { SCALE, RINK_WIDTH } from '../config/constants';
/**
* Utility class for converting between game coordinates (meters) and screen coordinates (pixels)
@ -14,7 +14,8 @@ export class CoordinateUtils {
*/
static gameToScreen(scene: Phaser.Scene, gameX: number, gameY: number): { x: number; y: number } {
const centerX = (scene.game.config.width as number) / 2;
const centerY = (scene.game.config.height as number) / 2;
// Center Y should be the center of the rink (not the full canvas including UI padding)
const centerY = (RINK_WIDTH * SCALE) / 2;
return {
x: centerX + gameX * SCALE,
y: centerY - gameY * SCALE // Negative Y because screen coords increase downward
@ -30,7 +31,8 @@ export class CoordinateUtils {
*/
static screenToGame(scene: Phaser.Scene, screenX: number, screenY: number): { x: number; y: number } {
const centerX = (scene.game.config.width as number) / 2;
const centerY = (scene.game.config.height as number) / 2;
// Center Y should be the center of the rink (not the full canvas including UI padding)
const centerY = (RINK_WIDTH * SCALE) / 2;
return {
x: (screenX - centerX) / SCALE,
y: -(screenY - centerY) / SCALE // Negative Y to convert screen coords back to game coords