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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.
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     13 in the documentation and/or other materials provided with the
     14 distribution.
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     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 Transitions</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 
     72 window.onload = function () {
     73     PerfTestRunner.prepareToMeasureValuesAsync({done: onCompletedRun, unit: 'fps'});
     74 
     75     // Create the particles
     76     for (var i = 0; i < maxParticles; i++) {
     77         var particle = new Particle();
     78         particle.start();
     79         particles.push(particle);
     80     }
     81 
     82     startTrackingFrameRate();
     83 }
     84 
     85 function Particle()
     86 {
     87     var angle = Math.PI * 2 * PerfTestRunner.random();
     88     var velocity = minVelocity + ((maxVelocity - minVelocity) * PerfTestRunner.random());
     89     var x = stageWidth / 2 - particleRadius;
     90     var y = stageHeight / 2 - particleRadius;
     91     var dx = Math.cos(angle) * velocity;
     92     var dy = Math.sin(angle) * velocity;
     93 
     94     // Create visual element for the particle
     95     var domNode = document.createElement('span');
     96     document.body.appendChild(domNode);
     97 
     98     // Set initial position to middle of screen
     99     domNode.style.left = x + "px";
    100     domNode.style.top = y + "px";
    101 
    102     // Set colour of element
    103     domNode.style.backgroundColor = colors[Math.floor(Math.random() * colors.length)];
    104 
    105     domNode.style.webkitTransitionProperty = 'left, top, width, height, color, background, -webkit-mask, -webkit-transform, border';
    106     domNode.style.webkitTransitionTimingFunction = 'linear';
    107 
    108     function destroy()
    109     {
    110         document.body.removeChild(domNode);
    111     }
    112 
    113     function detectCollision(lineX, normalX, lineY, normalY) {
    114         var dtx = Infinity;
    115         var dty = Infinity;
    116         if (dx * normalX < 0)
    117             dtx = (lineX - x) / dx;
    118         if (dy * normalY < 0)
    119             dty = (lineY - y) / dy;
    120         var dt = Math.min(dtx, dty);
    121         var hitX = (dtx < dty);
    122         return {
    123             dt: dt,
    124             x: hitX ? lineX : x + (dx * dt),
    125             y: hitX ? y + (dy * dt) : lineY,
    126             dx: hitX ? -dx : dx,
    127             dy: hitX ? dy : -dy,
    128         };
    129     }
    130 
    131     function move() {
    132         if (!testRunning)
    133             return;
    134         var collisionA = detectCollision(0, 1, 0, 1);
    135         var collisionB = detectCollision(stageWidth, -1, stageHeight, -1);
    136         var collision = collisionA.dt < collisionB.dt ? collisionA : collisionB;
    137         domNode.style.webkitTransitionDuration = collision.dt + 's, ' + collision.dt + 's';
    138         domNode.style.left = collision.x + 'px';
    139         domNode.style.top = collision.y + 'px';
    140         x = collision.x;
    141         y = collision.y;
    142         dx = collision.dx;
    143         dy = collision.dy;
    144         setTimeout(move, collision.dt * 1000);
    145     }
    146 
    147     function start() {
    148         // Set timeout is used to ensure the transition-property value gets a chance to register on the element.
    149         setTimeout(move, 0);
    150     }
    151 
    152     this.start = start;
    153     this.destroy = destroy;
    154 }
    155 
    156 function onCompletedRun() {
    157     stopTrackingFrameRate();
    158 
    159     for (var i = 0; i < particles.length; i++)
    160         particles[i].destroy();
    161     particles = [];
    162 }
    163 </script>
    164 </head>
    165 </html>
    166