|
|
@@ -0,0 +1,340 @@
|
|
|
+<!DOCTYPE html>
|
|
|
+<html lang="en">
|
|
|
+<head>
|
|
|
+ <title>three.js webgl - instancing test</title>
|
|
|
+ <meta charset="utf-8">
|
|
|
+ <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
|
|
|
+ <style>
|
|
|
+ body {
|
|
|
+ color: #ffffff;
|
|
|
+ font-family: Monospace;
|
|
|
+ font-size: 13px;
|
|
|
+ text-align: center;
|
|
|
+ font-weight: bold;
|
|
|
+ background-color: #000000;
|
|
|
+ margin: 0px;
|
|
|
+ overflow: hidden;
|
|
|
+ }
|
|
|
+
|
|
|
+ #info {
|
|
|
+ position: absolute;
|
|
|
+ top: 0px;
|
|
|
+ width: 100%;
|
|
|
+ padding: 5px;
|
|
|
+ }
|
|
|
+
|
|
|
+ a {
|
|
|
+ color: #ffffff;
|
|
|
+ }
|
|
|
+
|
|
|
+ #oldie a {
|
|
|
+ color: #da0;
|
|
|
+ }
|
|
|
+
|
|
|
+ #notSupported {
|
|
|
+ width: 50%;
|
|
|
+ margin: auto;
|
|
|
+ border: 2px red solid;
|
|
|
+ margin-top: 20px;
|
|
|
+ padding: 10px;
|
|
|
+ }
|
|
|
+ </style>
|
|
|
+</head>
|
|
|
+<body>
|
|
|
+
|
|
|
+ <div id="container"></div>
|
|
|
+ <div id="info">
|
|
|
+ <a href="http://threejs.org" target="_blank">three.js</a> - instancing demo
|
|
|
+ <div id="notSupported" style="display:none">Sorry your graphics card + browser does not support hardware instancing</div>
|
|
|
+ </div>
|
|
|
+
|
|
|
+ <script src="js/libs/dat.gui.min.js"></script>
|
|
|
+ <script src="../build/three.js"></script>
|
|
|
+ <script src="js/Detector.js"></script>
|
|
|
+ <script src="js/libs/stats.min.js"></script>
|
|
|
+
|
|
|
+ <script src="js/controls/TrackballControls.js"></script>
|
|
|
+
|
|
|
+ <script id="vertexShader" type="x-shader/x-vertex">
|
|
|
+ precision highp float;
|
|
|
+
|
|
|
+ attribute vec3 instancePosition;
|
|
|
+ attribute vec4 instanceQuaternion;
|
|
|
+ attribute vec3 instanceScale;
|
|
|
+
|
|
|
+ vec3 applyTRS( vec3 position, vec3 translation, vec4 quaternion, vec3 scale ) {
|
|
|
+
|
|
|
+ position *= scale;
|
|
|
+ position += 2.0 * cross( quaternion.xyz, cross( quaternion.xyz, position ) + quaternion.w * position );
|
|
|
+ return position + translation;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ attribute vec3 color;
|
|
|
+ varying vec3 vColor;
|
|
|
+
|
|
|
+ void main(){
|
|
|
+
|
|
|
+ vColor = color;
|
|
|
+
|
|
|
+ vec3 transformed = applyTRS( position.xyz, instancePosition, instanceQuaternion, instanceScale );
|
|
|
+
|
|
|
+ gl_Position = projectionMatrix * modelViewMatrix * vec4( transformed, 1.0 );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ </script>
|
|
|
+
|
|
|
+ <script id="fragmentShader" type="x-shader/x-fragment">
|
|
|
+
|
|
|
+ precision highp float;
|
|
|
+ varying vec3 vColor;
|
|
|
+
|
|
|
+ void main() {
|
|
|
+
|
|
|
+ gl_FragColor = vec4( vColor, 1.0 );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ </script>
|
|
|
+
|
|
|
+ <script>
|
|
|
+
|
|
|
+ if ( !Detector.webgl ) Detector.addGetWebGLMessage();
|
|
|
+
|
|
|
+ var container, stats;
|
|
|
+
|
|
|
+ var camera, scene, renderer;
|
|
|
+
|
|
|
+ var controls;
|
|
|
+
|
|
|
+ init();
|
|
|
+ animate();
|
|
|
+
|
|
|
+ function init() {
|
|
|
+
|
|
|
+ container = document.getElementById( 'container' );
|
|
|
+
|
|
|
+ camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.01, 100 );
|
|
|
+ camera.position.z = 4;
|
|
|
+
|
|
|
+ controls = new THREE.TrackballControls( camera );
|
|
|
+
|
|
|
+ scene = new THREE.Scene();
|
|
|
+
|
|
|
+ //
|
|
|
+
|
|
|
+ // var geometry = new THREE.BoxBufferGeometry( 0.01, 0.01, 0.01 );
|
|
|
+ var geometry = new THREE.IcosahedronBufferGeometry( 0.1, 1 );
|
|
|
+
|
|
|
+ var colors = [];
|
|
|
+
|
|
|
+ for ( var i = 0, l = geometry.attributes.position.count; i < l; i ++ ) {
|
|
|
+
|
|
|
+ colors.push( Math.random(), Math.random(), Math.random() );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ geometry.addAttribute( 'color', new THREE.Float32BufferAttribute( colors, 3 ) );
|
|
|
+
|
|
|
+ var material = new THREE.MeshBasicMaterial( { color: 0xff0000, vertexColors: THREE.VertexColors } );
|
|
|
+
|
|
|
+ var mesh = new THREE.Mesh( geometry, material );
|
|
|
+ // scene.add( mesh );
|
|
|
+
|
|
|
+ //
|
|
|
+
|
|
|
+ var INSTANCE_COUNT = 100;
|
|
|
+
|
|
|
+ var geometry2 = new THREE.InstancedBufferGeometry().copy( geometry );
|
|
|
+
|
|
|
+ var instancePositions = [];
|
|
|
+ var instanceQuaternions = [];
|
|
|
+ var instanceScales = [];
|
|
|
+
|
|
|
+ // var position = new THREE.Vector3();
|
|
|
+ // var quaternion = new THREE.Quaternion();
|
|
|
+
|
|
|
+ for ( var i = 0; i < INSTANCE_COUNT; i ++ ) {
|
|
|
+
|
|
|
+ var mesh = new THREE.Mesh( geometry, material );
|
|
|
+ scene.add( mesh );
|
|
|
+
|
|
|
+ var position = mesh.position;
|
|
|
+ var quaternion = mesh.quaternion;
|
|
|
+ var scale = mesh.scale;
|
|
|
+
|
|
|
+ position.set( Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1 );
|
|
|
+
|
|
|
+ quaternion.set( Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1 );
|
|
|
+ quaternion.normalize();
|
|
|
+
|
|
|
+ scale.set( Math.random() * 2, Math.random() * 2, Math.random() * 2 );
|
|
|
+
|
|
|
+ instancePositions.push( position.x, position.y, position.z );
|
|
|
+ instanceQuaternions.push( quaternion.x, quaternion.y, quaternion.z, quaternion.w );
|
|
|
+ instanceScales.push( scale.x, scale.y, scale.z );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ var attribute = new THREE.InstancedBufferAttribute( new Float32Array( instancePositions ), 3 );
|
|
|
+ geometry2.addAttribute( 'instancePosition', attribute );
|
|
|
+
|
|
|
+ var attribute = new THREE.InstancedBufferAttribute( new Float32Array( instanceQuaternions ), 4 );
|
|
|
+ geometry2.addAttribute( 'instanceQuaternion', attribute );
|
|
|
+
|
|
|
+ var attribute = new THREE.InstancedBufferAttribute( new Float32Array( instanceScales ), 3 );
|
|
|
+ geometry2.addAttribute( 'instanceScale', attribute );
|
|
|
+
|
|
|
+ var material = new THREE.ShaderMaterial( {
|
|
|
+
|
|
|
+ uniforms: {},
|
|
|
+ vertexShader: document.getElementById( 'vertexShader' ).textContent,
|
|
|
+ fragmentShader: document.getElementById( 'fragmentShader' ).textContent
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ var mesh2 = new THREE.Mesh( geometry2, material );
|
|
|
+ mesh2.position.x = 0.1;
|
|
|
+ scene.add( mesh2 );
|
|
|
+
|
|
|
+
|
|
|
+ /*
|
|
|
+ // geometry
|
|
|
+
|
|
|
+ var triangles = 1;
|
|
|
+ var instances = 65000;
|
|
|
+
|
|
|
+ var geometry = new THREE.InstancedBufferGeometry();
|
|
|
+
|
|
|
+ geometry.maxInstancedCount = instances; // set so its initalized for dat.GUI, will be set in first draw otherwise
|
|
|
+ var gui = new dat.GUI();
|
|
|
+ gui.add( geometry, "maxInstancedCount", 0, instances );
|
|
|
+
|
|
|
+ var vertices = new THREE.BufferAttribute( new Float32Array( triangles * 3 * 3 ), 3 );
|
|
|
+
|
|
|
+ vertices.setXYZ( 0, 0.025, -0.025, 0 );
|
|
|
+ vertices.setXYZ( 1, -0.025, 0.025, 0 );
|
|
|
+ vertices.setXYZ( 2, 0, 0, 0.025 );
|
|
|
+
|
|
|
+ geometry.addAttribute( 'position', vertices );
|
|
|
+
|
|
|
+ var offsets = new THREE.InstancedBufferAttribute( new Float32Array( instances * 3 ), 3, 1 );
|
|
|
+
|
|
|
+ for ( var i = 0, ul = offsets.count; i < ul; i++ ) {
|
|
|
+
|
|
|
+ offsets.setXYZ( i, Math.random() - 0.5, Math.random() - 0.5, Math.random() - 0.5 );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ geometry.addAttribute( 'offset', offsets );
|
|
|
+
|
|
|
+ var colors = new THREE.InstancedBufferAttribute( new Float32Array( instances * 4 ), 4, 1 );
|
|
|
+
|
|
|
+ for ( var i = 0, ul = colors.count; i < ul; i++ ) {
|
|
|
+
|
|
|
+ colors.setXYZW( i, Math.random(), Math.random(), Math.random(), Math.random() );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ geometry.addAttribute( 'color', colors );
|
|
|
+
|
|
|
+ var vector = new THREE.Vector4();
|
|
|
+
|
|
|
+ var orientationsStart = new THREE.InstancedBufferAttribute( new Float32Array( instances * 4 ), 4, 1 );
|
|
|
+
|
|
|
+ for ( var i = 0, ul = orientationsStart.count; i < ul; i++ ) {
|
|
|
+
|
|
|
+ vector.set( Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1 );
|
|
|
+ vector.normalize();
|
|
|
+
|
|
|
+ orientationsStart.setXYZW( i, vector.x, vector.y, vector.z, vector.w );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ geometry.addAttribute( 'orientationStart', orientationsStart );
|
|
|
+
|
|
|
+ var orientationsEnd = new THREE.InstancedBufferAttribute( new Float32Array( instances * 4 ), 4, 1 );
|
|
|
+
|
|
|
+ for ( var i = 0, ul = orientationsEnd.count; i < ul; i++ ) {
|
|
|
+
|
|
|
+ vector.set( Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1 );
|
|
|
+ vector.normalize();
|
|
|
+
|
|
|
+ orientationsEnd.setXYZW( i, vector.x, vector.y, vector.z, vector.w );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ geometry.addAttribute( 'orientationEnd', orientationsEnd );
|
|
|
+
|
|
|
+ // material
|
|
|
+
|
|
|
+ var material = new THREE.RawShaderMaterial( {
|
|
|
+
|
|
|
+ uniforms: {
|
|
|
+ time: { value: 1.0 },
|
|
|
+ sineTime: { value: 1.0 }
|
|
|
+ },
|
|
|
+ vertexShader: document.getElementById( 'vertexShader' ).textContent,
|
|
|
+ fragmentShader: document.getElementById( 'fragmentShader' ).textContent,
|
|
|
+ side: THREE.DoubleSide,
|
|
|
+ transparent: true
|
|
|
+
|
|
|
+ } );
|
|
|
+
|
|
|
+ var mesh = new THREE.Mesh( geometry, material );
|
|
|
+ scene.add( mesh );
|
|
|
+ */
|
|
|
+
|
|
|
+ renderer = new THREE.WebGLRenderer();
|
|
|
+
|
|
|
+ if ( renderer.extensions.get( 'ANGLE_instanced_arrays' ) === false ) {
|
|
|
+ document.getElementById( "notSupported" ).style.display = "";
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ renderer.setClearColor( 0x101010 );
|
|
|
+ renderer.setPixelRatio( window.devicePixelRatio );
|
|
|
+ renderer.setSize( window.innerWidth, window.innerHeight );
|
|
|
+ container.appendChild( renderer.domElement );
|
|
|
+
|
|
|
+ stats = new Stats();
|
|
|
+ container.appendChild( stats.dom );
|
|
|
+
|
|
|
+ window.addEventListener( 'resize', onWindowResize, false );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ function onWindowResize( event ) {
|
|
|
+
|
|
|
+ camera.aspect = window.innerWidth / window.innerHeight;
|
|
|
+ camera.updateProjectionMatrix();
|
|
|
+
|
|
|
+ renderer.setSize( window.innerWidth, window.innerHeight );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ //
|
|
|
+
|
|
|
+ function animate() {
|
|
|
+
|
|
|
+ requestAnimationFrame( animate );
|
|
|
+
|
|
|
+ render();
|
|
|
+ stats.update();
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ function render() {
|
|
|
+
|
|
|
+ controls.update();
|
|
|
+
|
|
|
+ renderer.render( scene, camera );
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ </script>
|
|
|
+
|
|
|
+</body>
|
|
|
+
|
|
|
+</html>
|
Mr.doob