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- <!-- Licensed under a BSD license. See license.html for license -->
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
- <title>Three.js - Rendering on Demand w/GUI</title>
- <style>
- html, body {
- height: 100%;
- margin: 0;
- }
- #c {
- width: 100%;
- height: 100%;
- display: block;
- }
- </style>
- </head>
- <body>
- <canvas id="c"></canvas>
- </body>
- <script type="importmap">
- {
- "imports": {
- "three": "../../build/three.module.js",
- "three/addons/": "../../examples/jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- function main() {
- const canvas = document.querySelector( '#c' );
- const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
- const fov = 75;
- const aspect = 2; // the canvas default
- const near = 0.1;
- const far = 5;
- const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
- camera.position.z = 2;
- const controls = new OrbitControls( camera, canvas );
- controls.enableDamping = true;
- controls.target.set( 0, 0, 0 );
- controls.update();
- const gui = new GUI();
- const scene = new THREE.Scene();
- {
- const color = 0xFFFFFF;
- const intensity = 3;
- const light = new THREE.DirectionalLight( color, intensity );
- light.position.set( - 1, 2, 4 );
- scene.add( light );
- }
- const boxWidth = 1;
- const boxHeight = 1;
- const boxDepth = 1;
- const geometry = new THREE.BoxGeometry( boxWidth, boxHeight, boxDepth );
- class ColorGUIHelper {
- constructor( object, prop ) {
- this.object = object;
- this.prop = prop;
- }
- get value() {
- return `#${this.object[ this.prop ].getHexString()}`;
- }
- set value( hexString ) {
- this.object[ this.prop ].set( hexString );
- }
- }
- function makeInstance( geometry, color, x ) {
- const material = new THREE.MeshPhongMaterial( { color } );
- const cube = new THREE.Mesh( geometry, material );
- scene.add( cube );
- cube.position.x = x;
- const folder = gui.addFolder( `Cube${x}` );
- folder.addColor( new ColorGUIHelper( material, 'color' ), 'value' )
- .name( 'color' )
- .onChange( requestRenderIfNotRequested );
- folder.add( cube.scale, 'x', .1, 1.5 )
- .name( 'scale x' )
- .onChange( requestRenderIfNotRequested );
- folder.open();
- return cube;
- }
- makeInstance( geometry, 0x44aa88, 0 );
- makeInstance( geometry, 0x8844aa, - 2 );
- makeInstance( geometry, 0xaa8844, 2 );
- function resizeRendererToDisplaySize( renderer ) {
- const canvas = renderer.domElement;
- const width = canvas.clientWidth;
- const height = canvas.clientHeight;
- const needResize = canvas.width !== width || canvas.height !== height;
- if ( needResize ) {
- renderer.setSize( width, height, false );
- }
- return needResize;
- }
- let renderRequested = false;
- function render() {
- renderRequested = undefined;
- if ( resizeRendererToDisplaySize( renderer ) ) {
- const canvas = renderer.domElement;
- camera.aspect = canvas.clientWidth / canvas.clientHeight;
- camera.updateProjectionMatrix();
- }
- controls.update();
- renderer.render( scene, camera );
- }
- render();
- function requestRenderIfNotRequested() {
- if ( ! renderRequested ) {
- renderRequested = true;
- requestAnimationFrame( render );
- }
- }
- controls.addEventListener( 'change', requestRenderIfNotRequested );
- window.addEventListener( 'resize', requestRenderIfNotRequested );
- }
- main();
- </script>
- </html>
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