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Test case details

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Preparation code

Preparation code HTML (this will be inserted in the <body> of a valid HTML5 document in standards mode) (useful when testing DOM operations or including libraries)

Include JavaScript libraries as follows: <script src="//cdn.ext/library.js"></script>

Define setup for all tests (variables, functions, arrays or other objects that will be used in the tests) (runs before each clocked test loop, outside of the timed code region) (e.g. define local test variables, reset global variables, clear canvas, etc.) (see FAQ)

// JavaScript Document
var canvas = document.getElementById("canvas");
var context = canvas.getContext('2d');

var speed = -1;
var imgX = 0;
var imgY = 0;
var windowOpen = false;
var anim = false;

var imgWindow = new Image();
var imgFrame  = new Image();
var imgBg = new Image();

imgWindow.src = "img/window.png";
imgFrame.src = "img/frame.png";
imgBg.src = "img/bg.png";

var posX = 220; //Position x of the Smoke
var posY = 95; //Position y of the Smoke

var smokeSetting = {
	quantity		: 30, //Do not use more than 200... 
	color			: "#FFF", //Color 
	opacityStart 	: 9,
	opacityEnd		: 9,
	width			: 2, //The width where the Smoke is coming out
	minSpeed		: 50, //The min Speed of a particel
	maxSpeed		: 100, //The max Speed of a particel
	minLength		: 50, //The min lenght of the Smoke...
	maxLenght		: 80, //The max lenght of the Smoke...
	size			: 0.4,	//Size of one particel
	speedX			: 0.02 // "Wind" 
};

function circle(obj) {
	context.beginPath();
	context.arc(obj.posX + posX, obj.posY, obj.size, 0, Math.PI * 2, true);
	context.fillStyle = obj.color;
	context.fill();
}

//Calculate a random number...
function randomFromInterval(from,to)
{
    return Math.floor(Math.random()*(to-from+1)+from);
}

function openWindow(){
	if(imgX >= -300){
		imgX += speed;
	} else {
		anim = false;
		windowOpen = true;
		playSound('bgNatur');
	}
}

function closeWindow(){
	if(imgX <= 0){
		imgX += speed;
	} else{
		windowOpen = false;
		anim = false;
		stopSound('bgNatur');
	}

}

function playSound(id){
	document.getElementById(id).currentTime = 0;
	document.getElementById(id).play();
}

function stopSound(id){
	//document.getElementById(id).stop();
	document.getElementById(id).pause();

}

function initialize(){
	smoke = new Array();
	for(var i = 0; i < smokeSetting.quantity; i++){
		smoke[i] = new Object();
		smoke[i]["speed"]		= randomFromInterval(smokeSetting.minSpeed, smokeSetting.maxSpeed) / 2000;
		smoke[i]["lenght"]		= randomFromInterval(smokeSetting.minLength, smokeSetting.maxLenght);
		smoke[i]["posX"]		= randomFromInterval(0, smokeSetting.width);
		smoke[i]["posY"]		= posY;
		smoke[i]["size"]		= smokeSetting.size;
		smoke[i]["color"]		= smokeSetting.color;
		smoke[i]["speedX"]		= smokeSetting.speedX;
		
		//Start the animation
		animate();
	}	
}

function animate(){
	reqAnimFrame = 
	 	window.requestAnimationFrame ||
    	window.webkitRequestAnimationFrame ||
    	window.mozRequestAnimationFrame ||
    	window.oRequestAnimationFrame ||
    	window.msRequestAnimationFrame;

reqAnimFrame(animate);
	
	$("#canvas").click(function(){
		anim = true
	});
	
	if(anim){
		if(!windowOpen){
			if(speed > 0){
				speed = -speed;
			}
			openWindow();
		} else{
			if(speed < 0){
				speed = -speed;
			}
			closeWindow();
		}
	}
	
	for(var i = 0; i < smoke.length; i++) {
  		for (var attribute in smoke[i]){
			if(smoke[i]["posY"] < -smoke[i]["lenght"] + posY){
				smoke[i]["posY"] = posY;
				smoke[i]["posX"] = randomFromInterval(0, smokeSetting.width);
			} else{
				smoke[i]["posY"] += -smoke[i]["speed"];
				
				if(smoke[i]["posY"] > ((smoke[i]["lenght"] + smoke[i]["posY"]) / 2)){
					smoke[i]["posX"] += smoke[i]["speedX"]
				}
			}
		}
	}

draw();
}

initialize();

Define teardown for all tests (runs after each clocked test loop, outside of the timed code region) (see FAQ)

Code snippets to compare

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