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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - materials - modified</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">
- </head>
- <body>
- <div id="info">
- <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> wegbl - modified material.
- <a href="https://casual-effects.com/data/" target="_blank" rel="noopener">Lee Perry-Smith</a> head.
- </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';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
- let camera, scene, renderer, stats;
- init();
- function init() {
- camera = new THREE.PerspectiveCamera( 27, window.innerWidth / window.innerHeight, 0.1, 100 );
- camera.position.z = 20;
- scene = new THREE.Scene();
- const loader = new GLTFLoader();
- loader.load( 'models/gltf/LeePerrySmith/LeePerrySmith.glb', function ( gltf ) {
- const geometry = gltf.scene.children[ 0 ].geometry;
- let mesh = new THREE.Mesh( geometry, buildTwistMaterial( 2.0 ) );
- mesh.position.x = - 3.5;
- mesh.position.y = - 0.5;
- scene.add( mesh );
- mesh = new THREE.Mesh( geometry, buildTwistMaterial( - 2.0 ) );
- mesh.position.x = 3.5;
- mesh.position.y = - 0.5;
- scene.add( mesh );
- } );
- renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- document.body.appendChild( renderer.domElement );
- const controls = new OrbitControls( camera, renderer.domElement );
- controls.minDistance = 10;
- controls.maxDistance = 50;
- //
- stats = new Stats();
- document.body.appendChild( stats.dom );
- // EVENTS
- window.addEventListener( 'resize', onWindowResize );
- }
- function buildTwistMaterial( amount ) {
- const material = new THREE.MeshNormalMaterial();
- material.onBeforeCompile = function ( shader ) {
- shader.uniforms.time = { value: 0 };
- shader.vertexShader = 'uniform float time;\n' + shader.vertexShader;
- shader.vertexShader = shader.vertexShader.replace(
- '#include <begin_vertex>',
- [
- `float theta = sin( time + position.y ) / ${ amount.toFixed( 1 ) };`,
- 'float c = cos( theta );',
- 'float s = sin( theta );',
- 'mat3 m = mat3( c, 0, s, 0, 1, 0, -s, 0, c );',
- 'vec3 transformed = vec3( position ) * m;',
- 'vNormal = vNormal * m;'
- ].join( '\n' )
- );
- material.userData.shader = shader;
- };
- // Make sure WebGLRenderer doesnt reuse a single program
- material.customProgramCacheKey = function () {
- return amount.toFixed( 1 );
- };
- return material;
- }
- //
- function onWindowResize() {
- const width = window.innerWidth;
- const height = window.innerHeight;
- camera.aspect = width / height;
- camera.updateProjectionMatrix();
- renderer.setSize( width, height );
- }
- //
- function animate() {
- render();
- stats.update();
- }
- function render() {
- scene.traverse( function ( child ) {
- if ( child.isMesh ) {
- const shader = child.material.userData.shader;
- if ( shader ) {
- shader.uniforms.time.value = performance.now() / 1000;
- }
- }
- } );
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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