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163 lines
3.8 KiB
163 lines
3.8 KiB
<!-- 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 - Screenshot (good)</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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#screenshot {
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position: absolute;
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left: 10px;
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top: 10px;
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padding: 10px;
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background: rgba(0,0,0,0.9);
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color: white;
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border: 1px solid gray;
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cursor: pointer;
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}
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#screenshot:hover {
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background: #444;
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}
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#screenshot:focus {
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outline: none;
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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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<button id="screenshot" type="button">Save...</button>
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</body>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../../build/three.module.js"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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function main() {
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const canvas = document.querySelector('#c');
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const renderer = new THREE.WebGLRenderer({canvas});
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const fov = 75;
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const aspect = 2; // the canvas default
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const near = 0.1;
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const far = 5;
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const camera = new THREE.PerspectiveCamera(fov, aspect, near, far);
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camera.position.z = 2;
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const scene = new THREE.Scene();
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{
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const color = 0xFFFFFF;
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const intensity = 1;
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const light = new THREE.DirectionalLight(color, intensity);
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light.position.set(-1, 2, 4);
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scene.add(light);
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}
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const boxWidth = 1;
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const boxHeight = 1;
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const boxDepth = 1;
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const geometry = new THREE.BoxGeometry(boxWidth, boxHeight, boxDepth);
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function makeInstance(geometry, color, x) {
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const material = new THREE.MeshPhongMaterial({color});
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const cube = new THREE.Mesh(geometry, material);
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scene.add(cube);
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cube.position.x = x;
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return cube;
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}
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const cubes = [
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makeInstance(geometry, 0x44aa88, 0),
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makeInstance(geometry, 0x8844aa, -2),
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makeInstance(geometry, 0xaa8844, 2),
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];
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function resizeRendererToDisplaySize(renderer) {
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const canvas = renderer.domElement;
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const width = canvas.clientWidth;
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const height = canvas.clientHeight;
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const needResize = canvas.width !== width || canvas.height !== height;
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if (needResize) {
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renderer.setSize(width, height, false);
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}
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return needResize;
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}
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const state = {
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time: 0,
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};
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function render() {
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if (resizeRendererToDisplaySize(renderer)) {
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const canvas = renderer.domElement;
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camera.aspect = canvas.clientWidth / canvas.clientHeight;
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camera.updateProjectionMatrix();
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}
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cubes.forEach((cube, ndx) => {
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const speed = 1 + ndx * .1;
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const rot = state.time * speed;
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cube.rotation.x = rot;
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cube.rotation.y = rot;
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});
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renderer.render(scene, camera);
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}
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function animate(time) {
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state.time = time * 0.001;
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render();
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requestAnimationFrame(animate);
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}
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requestAnimationFrame(animate);
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const elem = document.querySelector('#screenshot');
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elem.addEventListener('click', () => {
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render();
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canvas.toBlob((blob) => {
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saveBlob(blob, `screencapture-${canvas.width}x${canvas.height}.png`);
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});
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});
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const saveBlob = (function() {
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const a = document.createElement('a');
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document.body.appendChild(a);
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a.style.display = 'none';
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return function saveData(blob, fileName) {
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const url = window.URL.createObjectURL(blob);
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a.href = url;
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a.download = fileName;
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a.click();
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};
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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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