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175 lines
3.9 KiB
175 lines
3.9 KiB
2 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - materials - modified</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> wegbl - modified material.
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<a href="https://casual-effects.com/data/" target="_blank" rel="noopener">Lee Perry-Smith</a> head.
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</div>
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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/": "./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 Stats from 'three/addons/libs/stats.module.js';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
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let camera, scene, renderer, stats;
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init();
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animate();
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function init() {
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camera = new THREE.PerspectiveCamera( 27, window.innerWidth / window.innerHeight, 0.1, 100 );
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camera.position.z = 20;
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scene = new THREE.Scene();
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const loader = new GLTFLoader();
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loader.load( 'models/gltf/LeePerrySmith/LeePerrySmith.glb', function ( gltf ) {
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const geometry = gltf.scene.children[ 0 ].geometry;
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let mesh = new THREE.Mesh( geometry, buildTwistMaterial( 2.0 ) );
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mesh.position.x = - 3.5;
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mesh.position.y = - 0.5;
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scene.add( mesh );
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mesh = new THREE.Mesh( geometry, buildTwistMaterial( - 2.0 ) );
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mesh.position.x = 3.5;
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mesh.position.y = - 0.5;
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scene.add( mesh );
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} );
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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document.body.appendChild( renderer.domElement );
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const controls = new OrbitControls( camera, renderer.domElement );
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controls.minDistance = 10;
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controls.maxDistance = 50;
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//
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stats = new Stats();
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document.body.appendChild( stats.dom );
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// EVENTS
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window.addEventListener( 'resize', onWindowResize );
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}
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function buildTwistMaterial( amount ) {
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const material = new THREE.MeshNormalMaterial();
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material.onBeforeCompile = function ( shader ) {
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shader.uniforms.time = { value: 0 };
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shader.vertexShader = 'uniform float time;\n' + shader.vertexShader;
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shader.vertexShader = shader.vertexShader.replace(
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'#include <begin_vertex>',
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[
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`float theta = sin( time + position.y ) / ${ amount.toFixed( 1 ) };`,
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'float c = cos( theta );',
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'float s = sin( theta );',
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'mat3 m = mat3( c, 0, s, 0, 1, 0, -s, 0, c );',
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'vec3 transformed = vec3( position ) * m;',
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'vNormal = vNormal * m;'
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].join( '\n' )
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);
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material.userData.shader = shader;
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};
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// Make sure WebGLRenderer doesnt reuse a single program
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material.customProgramCacheKey = function () {
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return amount;
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};
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return material;
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}
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//
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function onWindowResize() {
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const width = window.innerWidth;
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const height = window.innerHeight;
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camera.aspect = width / height;
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camera.updateProjectionMatrix();
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renderer.setSize( width, height );
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}
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//
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function animate() {
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requestAnimationFrame( animate );
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render();
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stats.update();
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}
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function render() {
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scene.traverse( function ( child ) {
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if ( child.isMesh ) {
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const shader = child.material.userData.shader;
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if ( shader ) {
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shader.uniforms.time.value = performance.now() / 1000;
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}
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}
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} );
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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