folk-canvas/website/canvas/shape-collision-detection.html

81 lines
2.8 KiB
HTML

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Shapes - Collision</title>
<style>
* {
box-sizing: border-box;
}
html {
height: 100%;
}
body {
min-height: 100%;
position: relative;
margin: 0;
}
folk-shape {
border: 2px solid black;
}
p {
border: 1px solid grey;
max-width: 30ch;
margin: 0;
}
</style>
</head>
<body>
<p>
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore
magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
</p>
<p>
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore
magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
</p>
<folk-shape x="400" y="100" width="50" height="50"></folk-shape>
<folk-shape x="400" y="150" width="50" height="50"></folk-shape>
<folk-shape x="400" y="200" width="50" height="50"></folk-shape>
<folk-shape x="400" y="275" width="50" height="50"></folk-shape>
<script type="module">
import { FolkShape } from '@labs/standalone/folk-shape.ts';
import { aabbHitDetection } from '@lib/common/collision.ts';
const shapes = Array.from(document.querySelectorAll('folk-shape, p'));
const getBoundingBox = (el) => (el instanceof FolkShape ? el.getTransformDOMRect() : el.getBoundingClientRect());
function handleCollision(e) {
for (const shape of shapes) {
if (shape === e.target) continue;
const hit = aabbHitDetection(getBoundingBox(e.target), getBoundingBox(shape));
if (hit === null) continue;
if (shape instanceof FolkShape) {
if (hit.delta.x !== 0) shape.x += hit.delta.x;
if (hit.delta.y !== 0) shape.y += hit.delta.y;
} else {
if (hit.delta.x !== 0) e.preventX();
if (hit.delta.y !== 0) e.preventY();
}
}
}
document.addEventListener('transform', handleCollision);
</script>
</body>
</html>