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Week 2 Homework-Three.js
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| <!--based on code from http://threejs.org/examples/canvas_lines_sphere.html | |
| Minor changes by Amelia Winger-Bearskin for Dan Shiffman's Creative JavaScript Class 2014 | |
| --> | |
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <title>three.js-Amelia's Experiment-Week2</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: #ffffff; | |
| margin: 0px; | |
| overflow: hidden; | |
| } | |
| a { | |
| color:#ffffff; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script language="javascript" type="text/javascript" src="three.js"></script> | |
| <script> | |
| var SCREEN_WIDTH = window.innerWidth, | |
| SCREEN_HEIGHT = window.innerHeight, | |
| mouseX = 0, mouseY = 0, | |
| windowHalfX = window.innerWidth / 2, | |
| windowHalfY = window.innerHeight / 2, | |
| SEPARATION = 500, | |
| AMOUNTX = 10, | |
| AMOUNTY = 10, | |
| camera, scene, renderer; | |
| init(); | |
| animate(); | |
| function init() { | |
| var container, separation = 100, amountX = 50, amountY = 50, | |
| particles, particle; | |
| container = document.createElement('div'); | |
| document.body.appendChild(container); | |
| camera = new THREE.PerspectiveCamera( 75, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 10000 ); | |
| camera.position.z = 1000; | |
| scene = new THREE.Scene(); | |
| renderer = new THREE.CanvasRenderer(); | |
| renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT ); | |
| container.appendChild( renderer.domElement ); | |
| //light | |
| // var light = new THREE.AmbientLight( 0x404090 ); // soft white light | |
| // scene.add( light ); | |
| // particles | |
| var PI2 = Math.PI * 2; | |
| var material = new THREE.SpriteCanvasMaterial( { | |
| color: 0xffffff, | |
| program: function ( context ) { | |
| context.beginPath(); | |
| context.arc( 0, 0, 0.5, 0, PI2, true ); | |
| context.fill(); | |
| } | |
| } ); | |
| for ( var i = 0; i < 1000; i ++ ) { | |
| particle = new THREE.Sprite( material ); | |
| particle.position.x = Math.random() * 2 - 1; | |
| particle.position.y = Math.random() * 2 - 1; | |
| particle.position.z = Math.random() * 2 - 1; | |
| particle.position.normalize(); | |
| particle.position.multiplyScalar( Math.random() * 10 + 750 ); | |
| particle.scale.multiplyScalar( 3 ); | |
| scene.add( particle ); | |
| } | |
| for ( var i = 0; i < 1000; i ++ ) { | |
| particle = new THREE.Sprite( material ); | |
| particle.position.x = Math.random() * 2 - 1; | |
| particle.position.y = Math.random() * 2 - 1; | |
| particle.position.z = Math.random() * 2 - 1; | |
| particle.position.normalize(); | |
| particle.position.multiplyScalar( Math.random() * 10 + window.innerHidth ); | |
| particle.scale.multiplyScalar( 5 ); | |
| scene.add( particle ); | |
| } | |
| for ( var i = 0; i < 1000; i ++ ) { | |
| particle = new THREE.Sprite( material ); | |
| particle.position.x = Math.random() * 2 - 1; | |
| particle.position.y = Math.random() * 2 - 1; | |
| particle.position.z = Math.random() * 2 - 1; | |
| particle.position.normalize(); | |
| particle.position.multiplyScalar( Math.random() * 10 + window.innerWidth ); | |
| particle.scale.multiplyScalar( 9 ); | |
| scene.add( particle ); | |
| } | |
| // lines | |
| for (var i = 0; i < 300; i++) { | |
| var geometry = new THREE.Geometry(); | |
| var vertex = new THREE.Vector3( Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1 ); | |
| vertex.normalize(); | |
| vertex.multiplyScalar(760); | |
| geometry.vertices.push( vertex ); | |
| var vertex2 = vertex.clone(); | |
| vertex2.multiplyScalar( Math.random() * 0.3 + 6); | |
| geometry.vertices.push( vertex2 ); | |
| var line = new THREE.Line( geometry, new THREE.LineBasicMaterial( { color: 0xfff666, opacity: Math.random() } ) ); | |
| scene.add( line ); | |
| var line = new THREE.Line( geometry, new THREE.LineBasicMaterial( { color: 0xff7f00, opacity: Math.random() } ) ); | |
| scene.add( line ); | |
| } | |
| 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(); | |
| } | |
| function render() { | |
| camera.position.x += ( mouseX - camera.position.x ) * .05; | |
| camera.position.y += ( - mouseY + 200 - camera.position.y ) * .05; | |
| camera.lookAt( scene.position ); | |
| renderer.render( scene, camera ); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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