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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - geometry - vertex colors</title>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
- <link type="text/css" rel="stylesheet" href="main.css">
- <style>
- body {
- background-color: #fff;
- color: #444;
- }
- a {
- color: #08f;
- }
- </style>
- </head>
- <body>
- <div id="container"></div>
- <div id="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - vertex colors</div>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import Stats from 'three/addons/libs/stats.module.js';
- let container, stats;
- let camera, scene, renderer;
- let mouseX = 0, mouseY = 0;
- let windowHalfX = window.innerWidth / 2;
- let windowHalfY = window.innerHeight / 2;
- init();
- function init() {
- container = document.getElementById( 'container' );
- camera = new THREE.PerspectiveCamera( 20, window.innerWidth / window.innerHeight, 1, 10000 );
- camera.position.z = 1800;
- scene = new THREE.Scene();
- scene.background = new THREE.Color( 0xffffff );
- const light = new THREE.DirectionalLight( 0xffffff, 3 );
- light.position.set( 0, 0, 1 );
- scene.add( light );
- // shadow
- const canvas = document.createElement( 'canvas' );
- canvas.width = 128;
- canvas.height = 128;
- const context = canvas.getContext( '2d' );
- const gradient = context.createRadialGradient( canvas.width / 2, canvas.height / 2, 0, canvas.width / 2, canvas.height / 2, canvas.width / 2 );
- gradient.addColorStop( 0.1, 'rgba(210,210,210,1)' );
- gradient.addColorStop( 1, 'rgba(255,255,255,1)' );
- context.fillStyle = gradient;
- context.fillRect( 0, 0, canvas.width, canvas.height );
- const shadowTexture = new THREE.CanvasTexture( canvas );
- const shadowMaterial = new THREE.MeshBasicMaterial( { map: shadowTexture } );
- const shadowGeo = new THREE.PlaneGeometry( 300, 300, 1, 1 );
- let shadowMesh;
- shadowMesh = new THREE.Mesh( shadowGeo, shadowMaterial );
- shadowMesh.position.y = - 250;
- shadowMesh.rotation.x = - Math.PI / 2;
- scene.add( shadowMesh );
- shadowMesh = new THREE.Mesh( shadowGeo, shadowMaterial );
- shadowMesh.position.y = - 250;
- shadowMesh.position.x = - 400;
- shadowMesh.rotation.x = - Math.PI / 2;
- scene.add( shadowMesh );
- shadowMesh = new THREE.Mesh( shadowGeo, shadowMaterial );
- shadowMesh.position.y = - 250;
- shadowMesh.position.x = 400;
- shadowMesh.rotation.x = - Math.PI / 2;
- scene.add( shadowMesh );
- const radius = 200;
- const geometry1 = new THREE.IcosahedronGeometry( radius, 1 );
- const count = geometry1.attributes.position.count;
- geometry1.setAttribute( 'color', new THREE.BufferAttribute( new Float32Array( count * 3 ), 3 ) );
- const geometry2 = geometry1.clone();
- const geometry3 = geometry1.clone();
- const color = new THREE.Color();
- const positions1 = geometry1.attributes.position;
- const positions2 = geometry2.attributes.position;
- const positions3 = geometry3.attributes.position;
- const colors1 = geometry1.attributes.color;
- const colors2 = geometry2.attributes.color;
- const colors3 = geometry3.attributes.color;
- for ( let i = 0; i < count; i ++ ) {
- color.setHSL( ( positions1.getY( i ) / radius + 1 ) / 2, 1.0, 0.5, THREE.SRGBColorSpace );
- colors1.setXYZ( i, color.r, color.g, color.b );
- color.setHSL( 0, ( positions2.getY( i ) / radius + 1 ) / 2, 0.5, THREE.SRGBColorSpace );
- colors2.setXYZ( i, color.r, color.g, color.b );
- color.setRGB( 1, 0.8 - ( positions3.getY( i ) / radius + 1 ) / 2, 0, THREE.SRGBColorSpace );
- colors3.setXYZ( i, color.r, color.g, color.b );
- }
- const material = new THREE.MeshPhongMaterial( {
- color: 0xffffff,
- flatShading: true,
- vertexColors: true,
- shininess: 0
- } );
- const wireframeMaterial = new THREE.MeshBasicMaterial( { color: 0x000000, wireframe: true, transparent: true } );
- let mesh = new THREE.Mesh( geometry1, material );
- let wireframe = new THREE.Mesh( geometry1, wireframeMaterial );
- mesh.add( wireframe );
- mesh.position.x = - 400;
- mesh.rotation.x = - 1.87;
- scene.add( mesh );
- mesh = new THREE.Mesh( geometry2, material );
- wireframe = new THREE.Mesh( geometry2, wireframeMaterial );
- mesh.add( wireframe );
- mesh.position.x = 400;
- scene.add( mesh );
- mesh = new THREE.Mesh( geometry3, material );
- wireframe = new THREE.Mesh( geometry3, wireframeMaterial );
- mesh.add( wireframe );
- scene.add( mesh );
- renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- container.appendChild( renderer.domElement );
- stats = new Stats();
- container.appendChild( stats.dom );
- document.addEventListener( 'mousemove', onDocumentMouseMove );
- //
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- windowHalfX = window.innerWidth / 2;
- windowHalfY = window.innerHeight / 2;
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- function onDocumentMouseMove( event ) {
- mouseX = ( event.clientX - windowHalfX );
- mouseY = ( event.clientY - windowHalfY );
- }
- //
- function animate() {
- render();
- stats.update();
- }
- function render() {
- camera.position.x += ( mouseX - camera.position.x ) * 0.05;
- camera.position.y += ( - mouseY - camera.position.y ) * 0.05;
- camera.lookAt( scene.position );
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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