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216 lines
4.8 KiB
216 lines
4.8 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 [lines]</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 vec3 displacement;
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attribute vec3 customColor;
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varying vec3 vColor;
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void main() {
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vec3 newPosition = position + amplitude * displacement;
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vColor = customColor;
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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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uniform vec3 color;
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uniform float opacity;
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varying vec3 vColor;
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void main() {
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gl_FragColor = vec4( vColor * color, opacity );
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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 { FontLoader } from 'three/addons/loaders/FontLoader.js';
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import { TextGeometry } from 'three/addons/geometries/TextGeometry.js';
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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 line, uniforms;
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const loader = new FontLoader();
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loader.load( 'fonts/helvetiker_bold.typeface.json', function ( font ) {
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init( font );
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animate();
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} );
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function init( font ) {
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camera = new THREE.PerspectiveCamera( 30, window.innerWidth / window.innerHeight, 1, 10000 );
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camera.position.z = 400;
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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: 5.0 },
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opacity: { value: 0.3 },
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color: { value: new THREE.Color( 0xffffff ) }
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};
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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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blending: THREE.AdditiveBlending,
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depthTest: false,
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transparent: true
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} );
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const geometry = new TextGeometry( 'three.js', {
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font: font,
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size: 50,
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height: 15,
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curveSegments: 10,
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bevelThickness: 5,
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bevelSize: 1.5,
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bevelEnabled: true,
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bevelSegments: 10,
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} );
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geometry.center();
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const count = geometry.attributes.position.count;
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const displacement = new THREE.Float32BufferAttribute( count * 3, 3 );
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geometry.setAttribute( 'displacement', displacement );
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const customColor = new THREE.Float32BufferAttribute( count * 3, 3 );
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geometry.setAttribute( 'customColor', customColor );
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const color = new THREE.Color( 0xffffff );
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for ( let i = 0, l = customColor.count; i < l; i ++ ) {
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color.setHSL( i / l, 0.5, 0.5 );
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color.toArray( customColor.array, i * customColor.itemSize );
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}
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line = new THREE.Line( geometry, shaderMaterial );
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line.rotation.x = 0.2;
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scene.add( line );
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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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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() * 0.001;
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line.rotation.y = 0.25 * time;
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uniforms.amplitude.value = Math.sin( 0.5 * time );
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uniforms.color.value.offsetHSL( 0.0005, 0, 0 );
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const attributes = line.geometry.attributes;
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const array = attributes.displacement.array;
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for ( let i = 0, l = array.length; i < l; i += 3 ) {
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array[ i ] += 0.3 * ( 0.5 - Math.random() );
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array[ i + 1 ] += 0.3 * ( 0.5 - Math.random() );
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array[ i + 2 ] += 0.3 * ( 0.5 - Math.random() );
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}
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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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