PerformanceTests/Animation/balls-transitions.html - chromium/blink - Git at Google

 <!--
 Copyright (c) 2012 Cameron Adams. All rights reserved.
 Copyright (c) 2012 Code Aurora Forum. All rights reserved.
 Copyright (C) 2013 Google Inc. All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
 met:
     * Redistributions of source code must retain the above copyright
 notice, this list of conditions and the following disclaimer.
     * Redistributions in binary form must reproduce the above
 copyright notice, this list of conditions and the following disclaimer
 in the documentation and/or other materials provided with the
 distribution.
     * Neither the name of Code Aurora Forum Inc., Google Inc. nor the
 names of its contributors may be used to endorse or promote products
 derived from this software without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 This test is based on code written by Cameron Adams and imported from
   http://themaninblue.com/experiment/AnimationBenchmark/html
 -->

 <!doctype html>
 <head>
 <title>Benchmark - Balls Animation using CSS Transitions</title>
 <style>
 html {
     height: 100%;
 }

 body {
     width: 100%;
     height: 100%;
     overflow: hidden;
     margin: 0;
     padding: 0;
 }

 span {
     position: absolute;
     width: 12px;
     height: 12px;
     border-radius: 6px;
 }
 </style>
 <script>
 var framesPerTimerReading = 10;
 var maxFrameTimes = 30;
 var stageWidth = 600;
 var stageHeight = 600;
 var maxParticles = 2500;
 var minVelocity = 50;
 var maxVelocity = 500;
 var particleRadius = 6;
 var colors = ["#cc0000", "#ffcc00", "#aaff00", "#0099cc", "#194c99", "#661999"];

 var testRunning = true;
 var frameCount = 0;
 var frameTimes = [];
 var particles = [];

 window.onload = function () {
     PerfTestRunner.prepareToMeasureValuesAsync({done: onCompletedRun, unit: 'fps'});

     // Create the particles
     for (var i = 0; i < maxParticles; i++) {
         var particle = new Particle();
         particle.start();
         particles.push(particle);
     }

     trackFrameRate();
 }

 function trackFrameRate()
 {
     var currTime = PerfTestRunner.now();

     if ((frameCount++ % framesPerTimerReading) == 0) {
         // Limit the frame time array to the last 30 frames
         while (frameTimes.length > maxFrameTimes)
             frameTimes.splice(0, 1);

         // Calculate the framerate based upon the difference between the absolute times of the oldest and newest frames,
         // subdivided by how many frames were drawn inbetween.
         var frameRate = framesPerTimerReading * 1000 / ((currTime - frameTimes[0]) / frameTimes.length);
         if (!isNaN(frameRate))
             PerfTestRunner.measureValueAsync(frameRate);

         frameTimes.push(currTime);
     }

     if (testRunning)
         requestAnimationFrame(trackFrameRate);
 }

 function Particle()
 {
     var angle = Math.PI * 2 * PerfTestRunner.random();
     var velocity = minVelocity + ((maxVelocity - minVelocity) * PerfTestRunner.random());
     var x = stageWidth / 2 - particleRadius;
     var y = stageHeight / 2 - particleRadius;
     var dx = Math.cos(angle) * velocity;
     var dy = Math.sin(angle) * velocity;

     // Create visual element for the particle
     var domNode = document.createElement('span');
     document.body.appendChild(domNode);

     // Set initial position to middle of screen
     domNode.style.left = x + "px";
     domNode.style.top = y + "px";

     // Set colour of element
     domNode.style.backgroundColor = colors[Math.floor(Math.random() * colors.length)];

     domNode.style.webkitTransitionProperty = 'left, top';
     domNode.style.webkitTransitionTimingFunction = 'linear';

     function destroy()
     {
         document.body.removeChild(domNode);
     }

     function detectCollision(lineX, normalX, lineY, normalY) {
         var dtx = Infinity;
         var dty = Infinity;
         if (dx * normalX < 0)
             dtx = (lineX - x) / dx;
         if (dy * normalY < 0)
             dty = (lineY - y) / dy;
         var dt = Math.min(dtx, dty);
         var hitX = (dtx < dty);
         return {
             dt: dt,
             x: hitX ? lineX : x + (dx * dt),
             y: hitX ? y + (dy * dt) : lineY,
             dx: hitX ? -dx : dx,
             dy: hitX ? dy : -dy,
         };
     }

     function move() {
         if (!testRunning)
             return;
         var collisionA = detectCollision(0, 1, 0, 1);
         var collisionB = detectCollision(stageWidth, -1, stageHeight, -1);
         var collision = collisionA.dt < collisionB.dt ? collisionA : collisionB;
         domNode.style.webkitTransitionDuration = collision.dt + 's, ' + collision.dt + 's';
         domNode.style.left = collision.x + 'px';
         domNode.style.top = collision.y + 'px';
         x = collision.x;
         y = collision.y;
         dx = collision.dx;
         dy = collision.dy;
         setTimeout(move, collision.dt * 1000);
     }

     function start() {
         // Set timeout is used to ensure the transition-property value gets a chance to register on the element.
         setTimeout(move, 0);
     }

     this.start = start;
     this.destroy = destroy;
 }

 function onCompletedRun() {
     testRunning = false;

     for (var i = 0; i < particles.length; i++)
         particles[i].destroy();
     particles = [];
 }
 </script>
 <script src="../resources/runner.js"></script>
 </head>
 </html>
	<!--
	Copyright (c) 2012 Cameron Adams. All rights reserved.
	Copyright (c) 2012 Code Aurora Forum. All rights reserved.
	Copyright (C) 2013 Google Inc. All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are
	met:
	* Redistributions of source code must retain the above copyright
	notice, this list of conditions and the following disclaimer.
	* Redistributions in binary form must reproduce the above
	copyright notice, this list of conditions and the following disclaimer
	in the documentation and/or other materials provided with the
	distribution.
	* Neither the name of Code Aurora Forum Inc., Google Inc. nor the
	names of its contributors may be used to endorse or promote products
	derived from this software without specific prior written permission.

	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	This test is based on code written by Cameron Adams and imported from
	http://themaninblue.com/experiment/AnimationBenchmark/html
	-->

	<!doctype html>
	<head>
	<title>Benchmark - Balls Animation using CSS Transitions</title>
	<style>
	html {
	height: 100%;
	}

	body {
	width: 100%;
	height: 100%;
	overflow: hidden;
	margin: 0;
	padding: 0;
	}

	span {
	position: absolute;
	width: 12px;
	height: 12px;
	border-radius: 6px;
	}
	</style>
	<script>
	var framesPerTimerReading = 10;
	var maxFrameTimes = 30;
	var stageWidth = 600;
	var stageHeight = 600;
	var maxParticles = 2500;
	var minVelocity = 50;
	var maxVelocity = 500;
	var particleRadius = 6;
	var colors = ["#cc0000", "#ffcc00", "#aaff00", "#0099cc", "#194c99", "#661999"];

	var testRunning = true;
	var frameCount = 0;
	var frameTimes = [];
	var particles = [];

	window.onload = function () {
	PerfTestRunner.prepareToMeasureValuesAsync({done: onCompletedRun, unit: 'fps'});

	// Create the particles
	for (var i = 0; i < maxParticles; i++) {
	var particle = new Particle();
	particle.start();
	particles.push(particle);
	}

	trackFrameRate();
	}

	function trackFrameRate()
	{
	var currTime = PerfTestRunner.now();

	if ((frameCount++ % framesPerTimerReading) == 0) {
	// Limit the frame time array to the last 30 frames
	while (frameTimes.length > maxFrameTimes)
	frameTimes.splice(0, 1);

	// Calculate the framerate based upon the difference between the absolute times of the oldest and newest frames,
	// subdivided by how many frames were drawn inbetween.
	var frameRate = framesPerTimerReading * 1000 / ((currTime - frameTimes[0]) / frameTimes.length);
	if (!isNaN(frameRate))
	PerfTestRunner.measureValueAsync(frameRate);

	frameTimes.push(currTime);
	}

	if (testRunning)
	requestAnimationFrame(trackFrameRate);
	}

	function Particle()
	{
	var angle = Math.PI * 2 * PerfTestRunner.random();
	var velocity = minVelocity + ((maxVelocity - minVelocity) * PerfTestRunner.random());
	var x = stageWidth / 2 - particleRadius;
	var y = stageHeight / 2 - particleRadius;
	var dx = Math.cos(angle) * velocity;
	var dy = Math.sin(angle) * velocity;

	// Create visual element for the particle
	var domNode = document.createElement('span');
	document.body.appendChild(domNode);

	// Set initial position to middle of screen
	domNode.style.left = x + "px";
	domNode.style.top = y + "px";

	// Set colour of element
	domNode.style.backgroundColor = colors[Math.floor(Math.random() * colors.length)];

	domNode.style.webkitTransitionProperty = 'left, top';
	domNode.style.webkitTransitionTimingFunction = 'linear';

	function destroy()
	{
	document.body.removeChild(domNode);
	}

	function detectCollision(lineX, normalX, lineY, normalY) {
	var dtx = Infinity;
	var dty = Infinity;
	if (dx * normalX < 0)
	dtx = (lineX - x) / dx;
	if (dy * normalY < 0)
	dty = (lineY - y) / dy;
	var dt = Math.min(dtx, dty);
	var hitX = (dtx < dty);
	return {
	dt: dt,
	x: hitX ? lineX : x + (dx * dt),
	y: hitX ? y + (dy * dt) : lineY,
	dx: hitX ? -dx : dx,
	dy: hitX ? dy : -dy,
	};
	}

	function move() {
	if (!testRunning)
	return;
	var collisionA = detectCollision(0, 1, 0, 1);
	var collisionB = detectCollision(stageWidth, -1, stageHeight, -1);
	var collision = collisionA.dt < collisionB.dt ? collisionA : collisionB;
	domNode.style.webkitTransitionDuration = collision.dt + 's, ' + collision.dt + 's';
	domNode.style.left = collision.x + 'px';
	domNode.style.top = collision.y + 'px';
	x = collision.x;
	y = collision.y;
	dx = collision.dx;
	dy = collision.dy;
	setTimeout(move, collision.dt * 1000);
	}

	function start() {
	// Set timeout is used to ensure the transition-property value gets a chance to register on the element.
	setTimeout(move, 0);
	}

	this.start = start;
	this.destroy = destroy;
	}

	function onCompletedRun() {
	testRunning = false;

	for (var i = 0; i < particles.length; i++)
	particles[i].destroy();
	particles = [];
	}
	</script>
	<script src="../resources/runner.js"></script>
	</head>
	</html>