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71 lines
1.6 KiB
71 lines
1.6 KiB
2 years ago
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<!-- Licensed under a BSD license. See license.html for license -->
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<!DOCTYPE html>
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<html>
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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, user-scalable=yes">
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<title>Three.js - OffscreenCanvas w/Fallback</title>
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<style>
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html, body {
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height: 100%;
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margin: 0;
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}
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#c {
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width: 100%;
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height: 100%;
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display: block;
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}
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</style>
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</head>
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<body>
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<canvas id="c"></canvas>
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</body>
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<script type="module">
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import {init, state} from './shared-cubes.js';
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function startWorker(canvas) {
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const offscreen = canvas.transferControlToOffscreen();
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const worker = new Worker('offscreencanvas-worker-cubes.js', {type: 'module'});
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worker.postMessage({type: 'init', canvas: offscreen}, [offscreen]);
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function sendSize() {
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worker.postMessage({
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type: 'size',
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width: canvas.clientWidth,
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height: canvas.clientHeight,
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});
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}
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window.addEventListener('resize', sendSize);
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sendSize();
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console.log('using OffscreenCanvas'); /* eslint-disable-line no-console */
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}
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function startMainPage(canvas) {
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init({canvas});
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function sendSize() {
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state.width = canvas.clientWidth;
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state.height = canvas.clientHeight;
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}
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window.addEventListener('resize', sendSize);
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sendSize();
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console.log('using regular canvas'); /* eslint-disable-line no-console */
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}
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function main() { /* eslint consistent-return: 0 */
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const canvas = document.querySelector('#c');
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if (canvas.transferControlToOffscreen) {
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startWorker(canvas);
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} else {
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startMainPage(canvas);
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}
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}
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main();
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</script>
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</html>
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