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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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     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
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     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 SVG Animations</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 var animationDuration = 10;
     69 
     70 var particles = [];
     71 
     72 window.onload = function () {
     73     svgContainer.setAttribute('width', stageWidth);
     74     svgContainer.setAttribute('height', stageHeight);
     75 
     76     for (var i = 0; i < maxParticles; i++)
     77         addParticle();
     78 
     79     PerfTestRunner.prepareToMeasureValuesAsync({done: onCompletedRun, unit: 'fps'});
     80 
     81     startTrackingFrameRate();
     82 }
     83 
     84 function addParticle()
     85 {
     86     var circle = document.createElementNS('http://www.w3.org/2000/svg','circle');
     87     circle.setAttribute('r', particleRadius);
     88     circle.setAttribute('fill', colors[Math.floor(Math.random() * colors.length)]);
     89     addAnimation(circle);
     90     svgContainer.appendChild(circle);
     91 }
     92 
     93 function addAnimation(target) {
     94     var angle = Math.PI * 2 * PerfTestRunner.random();
     95     var velocity = minVelocity + ((maxVelocity - minVelocity) * PerfTestRunner.random());
     96     var x = stageWidth / 2 - particleRadius;
     97     var y = stageHeight / 2 - particleRadius;
     98     var dx = Math.cos(angle) * velocity;
     99     var dy = Math.sin(angle) * velocity;
    100     var prevX = x;
    101     var prevY = y;
    102 
    103     function detectCollision(lineX, normalX, lineY, normalY) {
    104         var dtx = Infinity;
    105         var dty = Infinity;
    106         if (dx * normalX < 0)
    107             dtx = (lineX - x) / dx;
    108         if (dy * normalY < 0)
    109             dty = (lineY - y) / dy;
    110         var dt = Math.min(dtx, dty);
    111         var hitX = (dtx < dty);
    112         return {
    113             dt: dt,
    114             x: hitX ? lineX : x + (dx * dt),
    115             y: hitX ? y + (dy * dt) : lineY,
    116             dx: hitX ? -dx : dx,
    117             dy: hitX ? dy : -dy,
    118         };
    119     }
    120 
    121     var t = 0;
    122     var prevT = t;
    123     while (t < animationDuration) {
    124         var collisionA = detectCollision(0, 1, 0, 1);
    125         var collisionB = detectCollision(stageWidth, -1, stageHeight, -1);
    126         var collision = collisionA.dt < collisionB.dt ? collisionA : collisionB;
    127         if (t + collision.dt > animationDuration) {
    128             var dt = animationDuration - t;
    129             t = animationDuration;
    130             x += dx * dt;
    131             y += dy * dt;
    132         } else {
    133             t += collision.dt;
    134             x = collision.x;
    135             y = collision.y;
    136             dx = collision.dx;
    137             dy = collision.dy;
    138         }
    139         target.appendChild(generateTransition(prevT, prevX, prevY, t, x, y));
    140         prevX = x;
    141         prevY = y;
    142         prevT = t;
    143     }
    144     if (target.lastChild) {
    145         target.lastChild.setAttribute('repeatCount', '1000');
    146     }
    147 }
    148 
    149 function generateTransition(prevT, prevX, prevY, t, x, y) {
    150     var animation = document.createElementNS('http://www.w3.org/2000/svg','animateTransform');
    151     animation.setAttribute('attributeName', 'transform');
    152     animation.setAttribute('attributeType', 'xml');
    153     animation.setAttribute('type', 'translate' );
    154     animation.setAttribute('from', prevX + ' ' + prevY);
    155     animation.setAttribute('to', x + ' ' + y);
    156     animation.setAttribute('begin', prevT + 's');
    157     animation.setAttribute('dur', (t - prevT) + 's');
    158     return animation;
    159 }
    160 
    161 
    162 function onCompletedRun() {
    163     stopTrackingFrameRate();
    164     svgContainer.remove();
    165 }
    166 </script>
    167 </head>
    168 <svg ns="http://www.w3.org/2000/svg" version="1.1" id="svgContainer"></svg>
    169 </html>
    170