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| 1 <!-- | |
| 2 Copyright 2013 Google Inc. All Rights Reserved. | |
| 3 | |
| 4 Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 you may not use this file except in compliance with the License. | |
| 6 You may obtain a copy of the License at | |
| 7 | |
| 8 http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 | |
| 10 Unless required by applicable law or agreed to in writing, software | |
| 11 distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 See the License for the specific language governing permissions and | |
| 14 limitations under the License. | |
| 15 | |
| 16 This test is based on code written by Cameron Adams and imported from | |
| 17 http://themaninblue.com/experiment/AnimationBenchmark/html | |
| 18 --> | |
| 19 <!doctype html> | |
| 20 <head> | |
| 21 <style> | |
| 22 .ball { | |
| 23 position: absolute; | |
| 24 width: 12px; | |
| 25 height: 12px; | |
| 26 border-radius: 100%; | |
| 27 } | |
| 28 </style> | |
| 29 </head> | |
| 30 <script src="perf.js"></script> | |
| 31 <script src="../../web-animations.js"></script> | |
| 32 <script> | |
| 33 'use strict'; | |
| 34 | |
| 35 var stageWidth = 600; | |
| 36 var stageHeight = 600; | |
| 37 var particleCount = 2500; | |
| 38 var minVelocity = 50; | |
| 39 var maxVelocity = 500; | |
| 40 var particleRadius = 6; | |
| 41 var colors = ['#cc0000', '#ffcc00', '#aaff00', '#0099cc', '#194c99', '#661999']; | |
| 42 var animationDuration = 10; | |
| 43 | |
| 44 var particles = []; | |
| 45 var player; | |
| 46 | |
| 47 var Particle = function() { | |
| 48 this.element = document.createElement('div'); | |
| 49 this.element.className = 'ball'; | |
| 50 this.element.style.backgroundColor = colors[Math.floor(Perf.random() * colors.
length)]; | |
| 51 this.element.style.left = (stageWidth / 2 - particleRadius) + 'px'; | |
| 52 this.element.style.top = (stageHeight / 2 - particleRadius) + 'px'; | |
| 53 document.body.appendChild(this.element); | |
| 54 }; | |
| 55 | |
| 56 Particle.prototype.generateAnimation = function(duration) { | |
| 57 var keyframes = []; | |
| 58 | |
| 59 var angle = Math.PI * 2 * Perf.random(); | |
| 60 var velocity = minVelocity + ((maxVelocity - minVelocity) * Perf.random()); | |
| 61 var x = 0; | |
| 62 var y = 0; | |
| 63 var dx = Math.cos(angle) * velocity; | |
| 64 var dy = Math.sin(angle) * velocity; | |
| 65 | |
| 66 var nextCollision = function(lineX, normalX, lineY, normalY) { | |
| 67 var dtx = Infinity; | |
| 68 var dty = Infinity; | |
| 69 if (dx * normalX < 0) | |
| 70 dtx = (lineX - x) / dx; | |
| 71 if (dy * normalY < 0) | |
| 72 dty = (lineY - y) / dy; | |
| 73 var dt = Math.min(dtx, dty); | |
| 74 var hitX = (dtx < dty); | |
| 75 return { | |
| 76 dt: dt, | |
| 77 x: hitX ? lineX : x + (dx * dt), | |
| 78 y: hitX ? y + (dy * dt) : lineY, | |
| 79 dx: hitX ? -dx : dx, | |
| 80 dy: hitX ? dy : -dy, | |
| 81 }; | |
| 82 }; | |
| 83 | |
| 84 var t = 0; | |
| 85 keyframes.push(this.createKeyframe(0, x, y)); | |
| 86 while (t < duration) { | |
| 87 var collisionA = nextCollision(-stageWidth / 2, 1, -stageHeight / 2, 1); | |
| 88 var collisionB = nextCollision(stageWidth / 2, -1, stageHeight / 2, -1); | |
| 89 var collision = collisionA.dt < collisionB.dt ? collisionA : collisionB; | |
| 90 if (t + collision.dt > duration) { | |
| 91 var dt = duration - t; | |
| 92 t = duration; | |
| 93 x += dx * dt; | |
| 94 y += dy * dt; | |
| 95 } else { | |
| 96 t += collision.dt; | |
| 97 x = collision.x; | |
| 98 y = collision.y; | |
| 99 dx = collision.dx; | |
| 100 dy = collision.dy; | |
| 101 } | |
| 102 keyframes.push(this.createKeyframe(t / duration, x, y)); | |
| 103 } | |
| 104 | |
| 105 return new Animation(this.element, keyframes, duration); | |
| 106 }; | |
| 107 | |
| 108 Particle.prototype.createKeyframe = function(offset, x, y) { | |
| 109 return { | |
| 110 composite: 'add', | |
| 111 offset: offset, | |
| 112 left: x + 'px', | |
| 113 top: y + 'px', | |
| 114 }; | |
| 115 }; | |
| 116 | |
| 117 Particle.prototype.destroy = function() { | |
| 118 document.body.removeChild(this.element); | |
| 119 }; | |
| 120 | |
| 121 function cleanUp() { | |
| 122 player.source = null; | |
| 123 for (var i = 0; i < particles.length; i++) { | |
| 124 particles[i].destroy(); | |
| 125 } | |
| 126 particles = []; | |
| 127 } | |
| 128 | |
| 129 window.addEventListener('load', function () { | |
| 130 var spacing = document.createElement('div'); | |
| 131 spacing.style.display = 'inline-block'; | |
| 132 spacing.style.width = '600px'; | |
| 133 document.body.appendChild(spacing); | |
| 134 | |
| 135 var animationGroup = new AnimationGroup([], {iterations: Infinity, direction:
'alternate'}); | |
| 136 for (var i = 0; i < particleCount; i++) { | |
| 137 var particle = new Particle(); | |
| 138 animationGroup.append(particle.generateAnimation(animationDuration)); | |
| 139 particles.push(particle); | |
| 140 } | |
| 141 player = document.timeline.play(animationGroup); | |
| 142 | |
| 143 Perf.oncomplete = cleanUp; | |
| 144 Perf.start(); | |
| 145 }); | |
| 146 | |
| 147 </script> | |
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Chromium Code Reviews
Issue 786953007:
npm_modules: Fork bower_components into Polymer 0.4.0 and 0.5.0 versions (Closed)
Base URL: https://chromium.googlesource.com/infra/third_party/npm_modules.git@master