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153 lines
3.8 KiB
153 lines
3.8 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 - Rendering on Demand w/GUI</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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<!-- 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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"three/addons/": "../../examples/jsm/"
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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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import {OrbitControls} from 'three/addons/controls/OrbitControls.js';
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import {GUI} from 'three/addons/libs/lil-gui.module.min.js';
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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 controls = new OrbitControls(camera, canvas);
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controls.enableDamping = true;
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controls.target.set(0, 0, 0);
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controls.update();
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const gui = new GUI();
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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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class ColorGUIHelper {
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constructor(object, prop) {
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this.object = object;
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this.prop = prop;
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}
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get value() {
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return `#${this.object[this.prop].getHexString()}`;
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}
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set value(hexString) {
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this.object[this.prop].set(hexString);
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}
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}
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function makeInstance(geometry, color, x) {
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const material = new THREE.MeshPhongMaterial({color});
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const cube = new THREE.Mesh(geometry, material);
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scene.add(cube);
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cube.position.x = x;
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const folder = gui.addFolder(`Cube${x}`);
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folder.addColor(new ColorGUIHelper(material, 'color'), 'value')
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.name('color')
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.onChange(requestRenderIfNotRequested);
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folder.add(cube.scale, 'x', .1, 1.5)
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.name('scale x')
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.onChange(requestRenderIfNotRequested);
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folder.open();
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return cube;
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}
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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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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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let renderRequested = false;
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function render() {
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renderRequested = undefined;
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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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controls.update();
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renderer.render(scene, camera);
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}
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render();
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function requestRenderIfNotRequested() {
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if (!renderRequested) {
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renderRequested = true;
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requestAnimationFrame(render);
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}
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}
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controls.addEventListener('change', requestRenderIfNotRequested);
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window.addEventListener('resize', requestRenderIfNotRequested);
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}
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main();
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</script>
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</html>
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