121 lines
3.6 KiB
HTML
121 lines
3.6 KiB
HTML
<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>Physics</title>
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<style>
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html {
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height: 100%;
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}
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body {
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min-height: 100%;
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position: relative;
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margin: 0;
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inset: 0;
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overscroll-behavior: none;
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}
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folk-shape {
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position: absolute;
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background-color: rgba(100, 100, 100, 0.5);
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border: 2px solid rgba(0, 0, 0, 0.5);
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}
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folk-rope {
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pointer-events: none;
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}
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button {
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position: fixed;
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top: 1rem;
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left: 1rem;
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z-index: 100;
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padding: 0.5rem 1rem;
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background: black;
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color: white;
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border: none;
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border-radius: 5px;
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}
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</style>
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</head>
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<body>
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<button onclick="enableGravity()">Enable Gravity</button>
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<folk-physics>
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<folk-shape id="shape1" x="150" y="50" width="120" height="30" rotation="30"></folk-shape>
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<folk-shape id="shape2" x="250" y="350" width="40" height="120" rotation="45"></folk-shape>
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<folk-shape x="100" y="150" width="70" height="70" rotation="15"></folk-shape>
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<folk-shape x="200" y="300" width="90" height="45" rotation="-20"></folk-shape>
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<folk-shape x="300" y="200" width="35" height="85" rotation="60"></folk-shape>
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<folk-shape x="120" y="250" width="65" height="55" rotation="-40"></folk-shape>
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<folk-shape x="250" y="150" width="110" height="25" rotation="10"></folk-shape>
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<folk-shape x="180" y="380" width="75" height="95" rotation="-50"></folk-shape>
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<folk-rope source="#shape1" target="#shape2"></folk-rope>
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</folk-physics>
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<folk-gizmos></folk-gizmos>
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<script type="module">
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import { Vector } from '@lib/Vector';
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import '@labs/standalone/folk-shape.ts';
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import '@labs/standalone/folk-physics.ts';
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import '@labs/standalone/folk-rope.ts';
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import { Gizmos } from '@lib/folk-gizmos';
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const physics = document.querySelector('folk-physics');
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const ropes = Array.from(document.querySelectorAll('folk-rope'));
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let orientationEvent;
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const GRAVITY_SCALE = 500;
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function tick() {
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requestAnimationFrame(tick);
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if (!orientationEvent) return;
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const beta = orientationEvent.beta * (Math.PI / 180);
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const gamma = orientationEvent.gamma * (Math.PI / 180);
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const downwardVector = { x: Math.sin(gamma), y: Math.sin(beta) };
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const magnitude = Vector.mag(downwardVector);
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const direction = Vector.normalized(downwardVector);
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const gravity = Vector.scale(direction, magnitude * GRAVITY_SCALE);
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physics.world.gravity = {
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x: gravity.x * 0.1,
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y: gravity.y * 0.1,
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};
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ropes.forEach((rope) => {
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rope.gravity = Vector.scale(gravity, 6);
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});
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const center = {
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x: window.innerWidth / 2,
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y: window.innerHeight / 2,
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};
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Gizmos.clear();
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Gizmos.vector(
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center,
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{
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x: gravity.x / 2,
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y: gravity.y / 2,
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},
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{ color: 'grey', width: 3, size: 15 },
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);
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}
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tick();
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window.enableGravity = async function enableGravity() {
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if (DeviceOrientationEvent.requestPermission) {
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const permission = await DeviceOrientationEvent.requestPermission();
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if (permission !== 'granted') return;
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}
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window.addEventListener('deviceorientation', (e) => (orientationEvent = e));
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};
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</script>
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</body>
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</html>
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