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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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
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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,
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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 and requestAnimationFrame</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"];
69 var testRunning = true;
73 window.onload = function () {
74 PerfTestRunner.prepareToMeasureValuesAsync({
75 description: 'Measures animation performance of javascript to manipulate DOM elements (animating on left and top).',
80 // Create the particles
81 for (var i = 0; i < maxParticles; i++)
82 particles.push(new Particle());
84 // Start the animation
85 prevTime = PerfTestRunner.now();
87 startTrackingFrameRate();
92 var currTime = PerfTestRunner.now();
93 var timeDelta = currTime - prevTime;
96 for (var particle in particles)
97 particles[particle].draw(timeDelta);
102 requestAnimationFrame(animate);
107 var angle = Math.PI * 2 * PerfTestRunner.random();
108 var velocity = minVelocity + ((maxVelocity - minVelocity) * PerfTestRunner.random());
109 var x = stageWidth / 2 - particleRadius;
110 var y = stageHeight / 2 - particleRadius;
111 var dx = Math.cos(angle) * velocity;
112 var dy = Math.sin(angle) * velocity;
114 // Create visual element for the particle
115 var domNode = document.createElement('span');
116 document.body.appendChild(domNode);
118 // Set initial position to middle of screen
119 domNode.style.left = x + "px";
120 domNode.style.top = y + "px";
122 // Set colour of element
123 domNode.style.backgroundColor = colors[Math.floor(Math.random() * colors.length)];
127 document.body.removeChild(domNode);
130 function draw(timeDelta)
132 var timeDeltaSeconds = timeDelta / 1000;
133 var testX = x + (dx * timeDeltaSeconds);
134 var testY = y + (dy * timeDeltaSeconds);
136 if (testX < 0 || testX > stageWidth) {
142 if (testY < 0 || testY > stageHeight) {
149 domNode.style.left = x + "px";
150 domNode.style.top = y + "px";
154 this.destroy = destroy;
157 function onCompletedRun() {
158 stopTrackingFrameRate();
160 for (var i = 0; i < particles.length; i++)
161 particles[i].destroy();