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198 lines
4.6 KiB
198 lines
4.6 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 - custom attributes</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"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - custom attributes example</div>
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<div id="container"></div>
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<script type="x-shader/x-vertex" id="vertexshader">
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uniform float amplitude;
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attribute float displacement;
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varying vec3 vNormal;
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varying vec2 vUv;
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void main() {
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vNormal = normal;
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vUv = ( 0.5 + amplitude ) * uv + vec2( amplitude );
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vec3 newPosition = position + amplitude * normal * vec3( displacement );
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gl_Position = projectionMatrix * modelViewMatrix * vec4( newPosition, 1.0 );
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}
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</script>
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<script type="x-shader/x-fragment" id="fragmentshader">
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varying vec3 vNormal;
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varying vec2 vUv;
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uniform vec3 color;
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uniform sampler2D colorTexture;
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void main() {
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vec3 light = vec3( 0.5, 0.2, 1.0 );
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light = normalize( light );
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float dProd = dot( vNormal, light ) * 0.5 + 0.5;
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vec4 tcolor = texture2D( colorTexture, vUv );
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vec4 gray = vec4( vec3( tcolor.r * 0.3 + tcolor.g * 0.59 + tcolor.b * 0.11 ), 1.0 );
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gl_FragColor = gray * vec4( vec3( dProd ) * vec3( color ), 1.0 );
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}
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</script>
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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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let renderer, scene, camera, stats;
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let sphere, uniforms;
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let displacement, noise;
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init();
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animate();
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function init() {
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camera = new THREE.PerspectiveCamera( 30, window.innerWidth / window.innerHeight, 1, 10000 );
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camera.position.z = 300;
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0x050505 );
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uniforms = {
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'amplitude': { value: 1.0 },
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'color': { value: new THREE.Color( 0xff2200 ) },
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'colorTexture': { value: new THREE.TextureLoader().load( 'textures/water.jpg' ) }
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};
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uniforms[ 'colorTexture' ].value.wrapS = uniforms[ 'colorTexture' ].value.wrapT = THREE.RepeatWrapping;
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const shaderMaterial = new THREE.ShaderMaterial( {
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uniforms: uniforms,
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vertexShader: document.getElementById( 'vertexshader' ).textContent,
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fragmentShader: document.getElementById( 'fragmentshader' ).textContent
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} );
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const radius = 50, segments = 128, rings = 64;
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const geometry = new THREE.SphereGeometry( radius, segments, rings );
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displacement = new Float32Array( geometry.attributes.position.count );
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noise = new Float32Array( geometry.attributes.position.count );
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for ( let i = 0; i < displacement.length; i ++ ) {
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noise[ i ] = Math.random() * 5;
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}
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geometry.setAttribute( 'displacement', new THREE.BufferAttribute( displacement, 1 ) );
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sphere = new THREE.Mesh( geometry, shaderMaterial );
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scene.add( sphere );
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renderer = new THREE.WebGLRenderer();
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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const container = document.getElementById( 'container' );
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container.appendChild( renderer.domElement );
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stats = new Stats();
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container.appendChild( stats.dom );
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//
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window.addEventListener( 'resize', onWindowResize );
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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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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const time = Date.now() * 0.01;
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sphere.rotation.y = sphere.rotation.z = 0.01 * time;
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uniforms[ 'amplitude' ].value = 2.5 * Math.sin( sphere.rotation.y * 0.125 );
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uniforms[ 'color' ].value.offsetHSL( 0.0005, 0, 0 );
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for ( let i = 0; i < displacement.length; i ++ ) {
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displacement[ i ] = Math.sin( 0.1 * i + time );
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noise[ i ] += 0.5 * ( 0.5 - Math.random() );
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noise[ i ] = THREE.MathUtils.clamp( noise[ i ], - 5, 5 );
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displacement[ i ] += noise[ i ];
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}
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sphere.geometry.attributes.displacement.needsUpdate = true;
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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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