2 Copyright (c) 2012 Cameron Adams. All rights reserved.
3 Copyright (c) 2012 Code Aurora Forum. All rights reserved.
4 Copyright (C) 2013 Google Inc. All rights reserved.
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7 modification, are permitted provided that the following conditions are
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11 * Redistributions in binary form must reproduce the above
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13 in the documentation and/or other materials provided with the
15 * Neither the name of Code Aurora Forum Inc., Google Inc. nor the
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19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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29 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 This test is based on code written by Cameron Adams and imported from
32 http://themaninblue.com/experiment/AnimationBenchmark/html
37 <title>Benchmark - Balls Animation using CSS Animations</title>
58 <script src="../resources/runner.js"></script>
59 <script src="resources/framerate.js"></script>
62 var stageHeight = 600;
63 var maxParticles = 2500;
65 var maxVelocity = 500;
66 var particleRadius = 6;
67 var colors = ["#cc0000", "#ffcc00", "#aaff00", "#0099cc", "#194c99", "#661999"];
68 var animationDuration = 10;
71 var allParticleKeyframes = [];
73 window.onload = function () {
74 PerfTestRunner.prepareToMeasureValuesAsync({done: onCompletedRun, unit: 'fps'});
76 // Create the particles
77 for (var i = 0; i < maxParticles; i++) {
78 generateParticleKeyframes(i);
79 var particle = new Particle(i);
81 particles.push(particle);
84 startTrackingFrameRate();
87 function generateParticleKeyframes(index) {
88 allParticleKeyframes[index] = [];
90 var angle = Math.PI * 2 * PerfTestRunner.random();
91 var velocity = minVelocity + ((maxVelocity - minVelocity) * PerfTestRunner.random());
92 var x = stageWidth / 2 - particleRadius;
93 var y = stageHeight / 2 - particleRadius;
94 var dx = Math.cos(angle) * velocity;
95 var dy = Math.sin(angle) * velocity;
97 function detectCollision(lineX, normalX, lineY, normalY) {
100 if (dx * normalX < 0)
101 dtx = (lineX - x) / dx;
102 if (dy * normalY < 0)
103 dty = (lineY - y) / dy;
104 var dt = Math.min(dtx, dty);
105 var hitX = (dtx < dty);
108 x: hitX ? lineX : x + (dx * dt),
109 y: hitX ? y + (dy * dt) : lineY,
116 allParticleKeyframes[index].push(generateKeyframe(0, x, y));
117 while (t < animationDuration) {
118 var collisionA = detectCollision(0, 1, 0, 1);
119 var collisionB = detectCollision(stageWidth, -1, stageHeight, -1);
120 var collision = collisionA.dt < collisionB.dt ? collisionA : collisionB;
121 if (t + collision.dt > animationDuration) {
122 var dt = animationDuration - t;
123 t = animationDuration;
133 allParticleKeyframes[index].push(generateKeyframe(t, x, y));
137 function generateKeyframe(t, x, y) {
138 return {left: x + "px", top: y + "px", offset: t / animationDuration };
141 function Particle(index)
143 // Create visual element for the particle.
144 var domNode = document.createElement('span');
145 document.body.appendChild(domNode);
147 // Set colour of element.
148 domNode.style.backgroundColor = colors[Math.floor(Math.random() * colors.length)];
151 var player = domNode.animate(allParticleKeyframes[index], {easing: "linear", iterations: Infinity, direction: "alternate", duration: animationDuration * 1000});
156 document.body.removeChild(domNode);
160 this.destroy = destroy;
163 function onCompletedRun() {
165 stopTrackingFrameRate();
167 for (var i = 0; i < particles.length; i++)
168 particles[i].destroy();
172 <style id="keyframes"></style>