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      1 <!--
      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.
      5 
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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
     14 distribution.
     15     * Neither the name of Code Aurora Forum Inc., Google Inc. nor the
     16 names of its contributors may be used to endorse or promote products
     17 derived from this software without specific prior written permission.
     18 
     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,
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     27 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     29 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30 
     31 This test is based on code written by Cameron Adams and imported from
     32   http://themaninblue.com/experiment/AnimationBenchmark/html
     33 -->
     34 
     35 <!doctype html>
     36 <head>
     37 <title>Benchmark - Balls Animation using CSS and requestAnimationFrame</title>
     38 <style>
     39 html {
     40     height: 100%;
     41 }
     42 
     43 body {
     44     width: 100%;
     45     height: 100%;
     46     overflow: hidden;
     47     margin: 0;
     48     padding: 0;
     49 }
     50 
     51 span {
     52     position: absolute;
     53     width: 12px;
     54     height: 12px;
     55     border-radius: 6px;
     56 }
     57 </style>
     58 <script src="../resources/runner.js"></script>
     59 <script src="resources/framerate.js"></script>
     60 <script>
     61 var stageWidth = 600;
     62 var stageHeight = 600;
     63 var maxParticles = 2500;
     64 var minVelocity = 50;
     65 var maxVelocity = 500;
     66 var particleRadius = 6;
     67 var colors = ["#cc0000", "#ffcc00", "#aaff00", "#0099cc", "#194c99", "#661999"];
     68 
     69 var testRunning = true;
     70 var particles = [];
     71 var prevTime;
     72 
     73 window.onload = function () {
     74     PerfTestRunner.prepareToMeasureValuesAsync({done: onCompletedRun, unit: 'fps'});
     75 
     76     // Create the particles
     77     for (var i = 0; i < maxParticles; i++)
     78         particles.push(new Particle());
     79 
     80     // Start the animation
     81     prevTime = PerfTestRunner.now();
     82     animate();
     83     startTrackingFrameRate();
     84 }
     85 
     86 function animate()
     87 {
     88     var currTime = PerfTestRunner.now();
     89     var timeDelta = currTime - prevTime;
     90 
     91     // Draw each particle
     92     for (var particle in particles)
     93         particles[particle].draw(timeDelta);
     94 
     95     prevTime = currTime;
     96 
     97     if (testRunning)
     98         requestAnimationFrame(animate);
     99 }
    100 
    101 function Particle()
    102 {
    103     var angle = Math.PI * 2 * PerfTestRunner.random();
    104     var velocity = minVelocity + ((maxVelocity - minVelocity) * PerfTestRunner.random());
    105     var x = stageWidth / 2 - particleRadius;
    106     var y = stageHeight / 2 - particleRadius;
    107     var dx = Math.cos(angle) * velocity;
    108     var dy = Math.sin(angle) * velocity;
    109 
    110     // Create visual element for the particle
    111     var domNode = document.createElement('span');
    112     document.body.appendChild(domNode);
    113 
    114     // Set initial position to middle of screen
    115     domNode.style.left = x + "px";
    116     domNode.style.top = y + "px";
    117 
    118     // Set colour of element
    119     domNode.style.backgroundColor = colors[Math.floor(Math.random() * colors.length)];
    120 
    121     function destroy()
    122     {
    123         document.body.removeChild(domNode);
    124     }
    125 
    126     function draw(timeDelta)
    127     {
    128         var timeDeltaSeconds = timeDelta / 1000;
    129         var testX = x + (dx * timeDeltaSeconds);
    130         var testY = y + (dy * timeDeltaSeconds);
    131 
    132         if (testX < 0 || testX > stageWidth) {
    133             dx = -dx;
    134             x += dx;
    135         } else {
    136             x = testX;
    137         }
    138         if (testY < 0 || testY > stageHeight) {
    139             dy = -dy;
    140             y += dy;
    141         } else {
    142             y = testY;
    143         }
    144 
    145         domNode.style.left = x + "px";
    146         domNode.style.top = y + "px";
    147     }
    148 
    149     this.draw = draw;
    150     this.destroy = destroy;
    151 }
    152 
    153 function onCompletedRun() {
    154     stopTrackingFrameRate();
    155 
    156     for (var i = 0; i < particles.length; i++)
    157         particles[i].destroy();
    158     particles = [];
    159 }
    160 </script>
    161 </head>
    162 </html>
    163