<!DOCTYPE html> <html lang="en"> <head> <title>three.js webgl - particles - sprites</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 { background-color: #000000; margin: 0px; overflow: hidden; font-family:Monospace; font-size:13px; text-align:center; font-weight: bold; text-align:center; } a { color:#0078ff; } #info { color:#fff; position: absolute; top: 0px; width: 100%; padding: 5px; z-index:100; } </style> </head> <body> <div id="info"> <a href="http://threejs.org" target="_blank">three.js</a> - webgl particle sprites example - snowflakes by <a href="http://en.wikipedia.org/wiki/File:Sketch_of_snow_crystal_by_Ren%C3%A9_Descartes.jpg">René Descartes</a> </div> <script src="../build/three.min.js"></script> <script src="js/Detector.js"></script> <script src="js/libs/stats.min.js"></script> <script> if ( ! Detector.webgl ) Detector.addGetWebGLMessage(); var container, stats; var camera, scene, renderer, particles, geometry, materials = [], parameters, i, h, color, sprite, size; var mouseX = 0, mouseY = 0; var windowHalfX = window.innerWidth / 2; var windowHalfY = window.innerHeight / 2; init(); animate(); function init() { container = document.createElement( 'div' ); document.body.appendChild( container ); camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 1, 2000 ); camera.position.z = 1000; scene = new THREE.Scene(); scene.fog = new THREE.FogExp2( 0x000000, 0.0008 ); geometry = new THREE.Geometry(); sprite1 = THREE.ImageUtils.loadTexture( "textures/sprites/snowflake1.png" ); sprite2 = THREE.ImageUtils.loadTexture( "textures/sprites/snowflake2.png" ); sprite3 = THREE.ImageUtils.loadTexture( "textures/sprites/snowflake3.png" ); sprite4 = THREE.ImageUtils.loadTexture( "textures/sprites/snowflake4.png" ); sprite5 = THREE.ImageUtils.loadTexture( "textures/sprites/snowflake5.png" ); for ( i = 0; i < 10000; i ++ ) { var vertex = new THREE.Vector3(); vertex.x = Math.random() * 2000 - 1000; vertex.y = Math.random() * 2000 - 1000; vertex.z = Math.random() * 2000 - 1000; geometry.vertices.push( vertex ); } parameters = [ [ [1.0, 0.2, 0.5], sprite2, 20 ], [ [0.95, 0.1, 0.5], sprite3, 15 ], [ [0.90, 0.05, 0.5], sprite1, 10 ], [ [0.85, 0, 0.5], sprite5, 8 ], [ [0.80, 0, 0.5], sprite4, 5 ], ]; for ( i = 0; i < parameters.length; i ++ ) { color = parameters[i][0]; sprite = parameters[i][1]; size = parameters[i][2]; materials[i] = new THREE.PointCloudMaterial( { size: size, map: sprite, blending: THREE.AdditiveBlending, depthTest: false, transparent : true } ); materials[i].color.setHSL( color[0], color[1], color[2] ); particles = new THREE.PointCloud( geometry, materials[i] ); particles.rotation.x = Math.random() * 6; particles.rotation.y = Math.random() * 6; particles.rotation.z = Math.random() * 6; scene.add( particles ); } renderer = new THREE.WebGLRenderer(); renderer.setPixelRatio( window.devicePixelRatio ); renderer.setSize( window.innerWidth, window.innerHeight ); container.appendChild( renderer.domElement ); stats = new Stats(); stats.domElement.style.position = 'absolute'; stats.domElement.style.top = '0px'; container.appendChild( stats.domElement ); document.addEventListener( 'mousemove', onDocumentMouseMove, false ); document.addEventListener( 'touchstart', onDocumentTouchStart, false ); document.addEventListener( 'touchmove', onDocumentTouchMove, false ); // window.addEventListener( 'resize', onWindowResize, false ); } function onWindowResize() { windowHalfX = window.innerWidth / 2; windowHalfY = window.innerHeight / 2; camera.aspect = window.innerWidth / window.innerHeight; camera.updateProjectionMatrix(); renderer.setSize( window.innerWidth, window.innerHeight ); } function onDocumentMouseMove( event ) { mouseX = event.clientX - windowHalfX; mouseY = event.clientY - windowHalfY; } function onDocumentTouchStart( event ) { if ( event.touches.length === 1 ) { event.preventDefault(); mouseX = event.touches[ 0 ].pageX - windowHalfX; mouseY = event.touches[ 0 ].pageY - windowHalfY; } } function onDocumentTouchMove( event ) { if ( event.touches.length === 1 ) { event.preventDefault(); mouseX = event.touches[ 0 ].pageX - windowHalfX; mouseY = event.touches[ 0 ].pageY - windowHalfY; } } // function animate() { requestAnimationFrame( animate ); render(); stats.update(); } function render() { var time = Date.now() * 0.00005; camera.position.x += ( mouseX - camera.position.x ) * 0.05; camera.position.y += ( - mouseY - camera.position.y ) * 0.05; camera.lookAt( scene.position ); for ( i = 0; i < scene.children.length; i ++ ) { var object = scene.children[ i ]; if ( object instanceof THREE.PointCloud ) { object.rotation.y = time * ( i < 4 ? i + 1 : - ( i + 1 ) ); } } for ( i = 0; i < materials.length; i ++ ) { color = parameters[i][0]; h = ( 360 * ( color[0] + time ) % 360 ) / 360; materials[i].color.setHSL( h, color[1], color[2] ); } renderer.render( scene, camera ); } </script> </body> </html>