<!DOCTYPE html> <html lang="en"> <head> <title>three.js webgl - trails</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:#000; padding:0; margin:0; font-weight: bold; overflow:hidden; } </style> </head> <body> <script src="../build/three.min.js"></script> <script src="js/libs/stats.min.js"></script> <script> var container, stats; var camera, scene, renderer; 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( 60, window.innerWidth / window.innerHeight, 1, 10000 ); camera.position.set( 100000, 0, 3200 ); scene = new THREE.Scene(); var colors = [ 0x000000, 0xff0080, 0x8000ff, 0xffffff ]; var geometry = new THREE.Geometry(); for ( var i = 0; i < 2000; i ++ ) { var vertex = new THREE.Vector3(); vertex.x = Math.random() * 4000 - 2000; vertex.y = Math.random() * 4000 - 2000; vertex.z = Math.random() * 4000 - 2000; geometry.vertices.push( vertex ); geometry.colors.push( new THREE.Color( colors[ Math.floor( Math.random() * colors.length ) ] ) ); } var material = new THREE.PointCloudMaterial( { size: 1, vertexColors: THREE. VertexColors, depthTest: false, opacity: 0.5, sizeAttenuation: false, transparent: true } ); var mesh = new THREE.PointCloud( geometry, material ); scene.add( mesh ); renderer = new THREE.WebGLRenderer( { preserveDrawingBuffer: true } ); renderer.setPixelRatio( window.devicePixelRatio ); renderer.setSize( window.innerWidth, window.innerHeight ); renderer.sortObjects = false; renderer.autoClearColor = false; container.appendChild( renderer.domElement ); stats = new Stats(); stats.domElement.style.position = 'absolute'; stats.domElement.style.top = '0px'; stats.domElement.style.zIndex = 100; container.appendChild( stats.domElement ); // document.addEventListener( 'mousemove', onDocumentMouseMove, 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 ) * 10; mouseY = ( event.clientY - windowHalfY ) * 10; } // function animate() { requestAnimationFrame( animate ); render(); stats.update(); } function render() { camera.position.x += ( mouseX - camera.position.x ) * .05; camera.position.y += ( - mouseY - camera.position.y ) * .05; camera.lookAt( scene.position ); renderer.render( scene, camera ); } </script> </body> </html>