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158 lines
3.4 KiB
158 lines
3.4 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 memory test II</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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<style>
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body {
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background-color: #fff;
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color: #000;
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}
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a {
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color: #08f;
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}
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</style>
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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> - memory test II
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</div>
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<script type="x-shader/x-fragment" id="fragmentShader">
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void main() {
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if ( mod ( gl_FragCoord.x, 4.0001 ) < 1.0 || mod ( gl_FragCoord.y, 4.0001 ) < 1.0 )
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gl_FragColor = vec4( XXX, 1.0 );
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else
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gl_FragColor = vec4( 1.0 );
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}
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</script>
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<script type="x-shader/x-vertex" id="vertexShader">
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void main() {
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vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );
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gl_Position = projectionMatrix * mvPosition;
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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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const N = 100;
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let container;
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let camera, scene, renderer;
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let geometry;
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const meshes = [];
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let fragmentShader, vertexShader;
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init();
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setInterval( render, 1000 / 60 );
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function init() {
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container = document.createElement( 'div' );
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document.body.appendChild( container );
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vertexShader = document.getElementById( 'vertexShader' ).textContent;
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fragmentShader = document.getElementById( 'fragmentShader' ).textContent;
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camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 10000 );
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camera.position.z = 2000;
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0xffffff );
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geometry = new THREE.SphereGeometry( 15, 64, 32 );
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for ( let i = 0; i < N; i ++ ) {
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const material = new THREE.ShaderMaterial( { vertexShader: vertexShader, fragmentShader: generateFragmentShader() } );
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const mesh = new THREE.Mesh( geometry, material );
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mesh.position.x = ( 0.5 - Math.random() ) * 1000;
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mesh.position.y = ( 0.5 - Math.random() ) * 1000;
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mesh.position.z = ( 0.5 - Math.random() ) * 1000;
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scene.add( mesh );
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meshes.push( mesh );
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}
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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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container.appendChild( renderer.domElement );
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}
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//
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function generateFragmentShader() {
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return fragmentShader.replace( 'XXX', Math.random() + ',' + Math.random() + ',' + Math.random() );
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}
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function render() {
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for ( let i = 0; i < N; i ++ ) {
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const mesh = meshes[ i ];
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mesh.material = new THREE.ShaderMaterial( { vertexShader: vertexShader, fragmentShader: generateFragmentShader() } );
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}
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renderer.render( scene, camera );
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console.log( 'before', renderer.info.programs.length );
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for ( let i = 0; i < N; i ++ ) {
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const mesh = meshes[ i ];
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mesh.material.dispose();
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}
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console.log( 'after', renderer.info.programs.length );
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}
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</script>
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</body>
|
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</html>
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