html5/javascript游戏在ie8中运行缓慢
html5/javascript game running slow in ie8
我们用html/javascript制作了一个游戏。不幸的是,这个项目有很多秘密,所以我不能透露太多代码。
然而,本质是它在所有浏览器上都运行得非常好,除了使用<meta http-equiv="X-UA-Compatible" content="IE=9">
标记;现在唯一的问题是ie8,游戏需要与之兼容。我知道它很少集成html5,但游戏实际上是可行的,只是速度非常慢。
请记住,ie9和ie10在使用标签之前也非常慢。这个游戏在某种意义上是先进的或任何东西。所以我想知道是否有人知道是什么导致了这样的问题?
我将尝试在这里放一些混淆的代码,但请记住,这不是整个代码,只是主循环:
// Global constants:
var PLAYGROUND_WIDTH = 1000;
var PLAYGROUND_HEIGHT = 1000;
var REFRESH_RATE = 30;
//Constants for the gameplay
var smallStarSpeed = 1; //pixels per frame
var mediumStarSpeed = 3; //pixels per frame
var bigStarSpeed = 5; //pixels per frame
var percent = 1;
// --------------------------------------------------------------------
// -- the main declaration: --
// --------------------------------------------------------------------
$(function(){
//Calculate playground width and height:
PLAYGROUND_WIDTH = $(window).width() - 20;
PLAYGROUND_HEIGHT = $(window).height() - 20;
//Calculate Layour for responsive Design.
//Calculate Area:
// Animations declaration:
// The background:
var DM = new DeckManager;
var IM = new ImageManager;
IM.Create("Image1");
//DEBUG: Loading images for demo, this should be done using the image manager in the actual game.
var background1 = new $.gameQuery.Animation({
imageURL: "http://gamequeryjs.com/demos/3/background1.png"});
var background2 = new $.gameQuery.Animation({
imageURL: "http://gamequeryjs.com/demos/3/background2.png"});
var background3 = new $.gameQuery.Animation({
imageURL: "http://gamequeryjs.com/demos/3/background3.png"});
var background4 = new $.gameQuery.Animation({
imageURL: "http://gamequeryjs.com/demos/3/background4.png"});
var background5 = new $.gameQuery.Animation({
imageURL: "http://gamequeryjs.com/demos/3/background5.png"});
var background6 = new $.gameQuery.Animation({
imageURL: "http://gamequeryjs.com/demos/3/background6.png"});
var Face = new Array();
IM.Load("image2");
IM.Load("image3");
IM.Load("image4");
IM.Load("image5");
var resizeTimer;
//Event to handle resizing
//This event should fire under any circimstance, except when safari is NOT maximized, and windows resolution is changed (WTF?)
$(window).resize(function ()
{
clearTimeout(resizeTimer);
resizeTimer = setTimeout(Resized, 100);
});
//Actual Resizing Event
function Resized()
{
//Your function goes here
//Calculate playground width and height:
PLAYGROUND_WIDTH = $(window).width() - 20;
PLAYGROUND_HEIGHT = $(window).height() - 20;
//Calculate Layout for responsive Design.
};
// Initialize the game:
$("#playground").playground({
height: PLAYGROUND_HEIGHT,
width: PLAYGROUND_WIDTH,
keyTracker: true,
mouseTracker: true});
// Initialize the background
$.playground()
.addGroup("background", {width: PLAYGROUND_WIDTH,
height: PLAYGROUND_HEIGHT})
.addSprite("background1", {animation: background1,
width: PLAYGROUND_WIDTH,
height: PLAYGROUND_HEIGHT})
.addSprite("background2", {animation: background2,
width: PLAYGROUND_WIDTH,
height: PLAYGROUND_HEIGHT,
posx: PLAYGROUND_WIDTH})
.addSprite("background3", {animation: background3,
width: PLAYGROUND_WIDTH,
height: PLAYGROUND_HEIGHT})
.addSprite("background4", {animation: background4,
width: PLAYGROUND_WIDTH,
height: PLAYGROUND_HEIGHT,
posx: PLAYGROUND_WIDTH})
.addSprite("background5", {animation: background5,
width: PLAYGROUND_WIDTH,
height: PLAYGROUND_HEIGHT})
.addSprite("background6", {animation: background6,
width: PLAYGROUND_WIDTH,
height: PLAYGROUND_HEIGHT,
posx: PLAYGROUND_WIDTH})
$("#background").addSound(bgmusic);
//Setup obects so they can be reached randomly
var Vals = new Array();
var Vals2 = new Array();
var Turned = 0;
var TurnedMax = 2;
//This will ensure that two cards of each are added to the deck
//This function will be handled by the imagemanager at later stages.
for (var i = 0; i < NumberOfCards; ++i)
{
Vals[i] = Math.floor(i/2);
}
Vals2[0]=3;
DM.Create(Vals, Vals2, NumberOfCards, 1);
//Generate the actual object
$.playground()
.addGroup("object", {width: PLAYGROUND_WIDTH,
height: PLAYGROUND_HEIGHT})
for (var i = 0; i < NumberOfCards+1; ++i)
{
//Generate unique ID for the card
var name = "object"+i;
val = DM.Pushobject();
//Add the actual card to the playground, we spawn them in a responsive awy based on the resolution of the game.
$("#object").addSprite(name, {animation: IM.GetBack(), width: 208, height: 303, posx: (i%(Math.ceil(noc*Ratio))) *SpaceX + SpaceX - 104 + LastYOff * ( i>= (NumberOfCards + NumberOfCardsBonus) - ((NumberOfCards + NumberOfCardsBonus)%(Math.ceil(noc*Ratio))) ) , posy: Math.floor( i / (Math.ceil(noc*Ratio)) ) * SpaceY + SpaceY - 152 });//
//Add a class to the object, this, does nothing except make us able to search for objects with the same class later in the code.
$("#"+name).addClass("object");
//Create the actual class for the object, this will add logic to the object.
$("#"+name)[0].Cards = new Cards($("#"+name));
$("#"+name)[0].Cards.Create(val, IM.GetImage(val), IM.GetImage(3), IM.GetBack(), DM.LastBonus(), Scale);
//Add a mousedown event for the card, this mousedown will be run in the main
//environment rather than the class environment to make sure that we have access
//to all the data we need access to.
$("#"+name).mousedown(function(e)
{
var Ready = 0;
$(".object").each(function()
{
if (this.object.visible && (this.object.Turning==true || this.object.FlippedV==true))
{
Ready++;
}
});
//Find all the objects with the tag/class card.
$(".object").each(function()
{
//Check if the mouse clicked the object, if it's still part of the game, and if it has not been flipped.
if (e.clickedobject
&& Ready<TurnedMax)
{
//Run the clicked event for the card, this will start events etc.
this.object.Clicked();
//Increase the turned counter, if we have turned the correct amount of objectto be compared
//then compare them.
if (this.Cards.Bonus == false)
{
Turned++;
if (Turned==TurnedMax)
{
//We have turned the amount of object needed
//Find out which value the first object has, and use this as a base to compare if cards match.
//Also instantiate a counter for the amount of cards actually matching.
//It's done this way if you want a variable number of object needed for a match.
var Correct = this.object.value;
var CorrectAmount = 0;
$(".object").each(function()
{
//For each card, if they are flipped, are not going into hiding/deletion, and has the
//Correct value, increase the counter for the number of objects matching.
if (this.object.Flipped == true && this.object.Hiding==0 && this.object.value == Correct)
CorrectAmount++;
});
//If we have a correct match
if (CorrectAmount==TurnedMax)
{
$(".object").each(function()
{
//Foreach object that is flipped and not in hiding, delete them (aka. yay, you got a match).
if (this.object.Flipped==true && this.object.Hiding==0)
this.object.SetVisible(false);
});
}
$(".object").each(function()
{
//Foreach objectthat was not in hiding and was not part of the match, unflip them again.
if (this.object.Flipped==true && this.object.Hiding==0)
this.object.Hide();
});
Turned=0;
}
}
}
});
});
}
// this sets the id of the loading bar (NOT USED YET):
$.loadCallback(function(percent){
$("#loadingBar").width(400*percent);
});
//initialize the start button
$("#startbutton").click(function(){
$.playground().startGame(function(){
$("#welcomeScreen").remove();
});
})
//This is for the background animation (DEBUG)
$("#playground").registerCallback(function(){
$("#background1").x(($("#background1").x() + smallStarSpeed +PLAYGROUND_WIDTH) % (2 * PLAYGROUND_WIDTH) - PLAYGROUND_WIDTH);
$("#background2").x(($("#background2").x() + smallStarSpeed +PLAYGROUND_WIDTH) % (2 * PLAYGROUND_WIDTH) - PLAYGROUND_WIDTH);
$("#background3").x(($("#background3").x() + mediumStarSpeed +PLAYGROUND_WIDTH) % (2 * PLAYGROUND_WIDTH) - PLAYGROUND_WIDTH);
$("#background4").x(($("#background4").x() + mediumStarSpeed +PLAYGROUND_WIDTH) % (2 * PLAYGROUND_WIDTH) - PLAYGROUND_WIDTH);
$("#background5").x(($("#background5").x() + bigStarSpeed +PLAYGROUND_WIDTH) % (2 * PLAYGROUND_WIDTH) - PLAYGROUND_WIDTH);
$("#background6").x(($("#background6").x() + bigStarSpeed +PLAYGROUND_WIDTH) % (2 * PLAYGROUND_WIDTH) - PLAYGROUND_WIDTH);
//Basic Game Engine!!
$(".object").each(function()
{
//For each card, perform their step event.
this.object.Step();
});
}, REFRESH_RATE);
});
您说您正在使用<meta http-equiv="X-UA-Compatible" content="IE=9">
。
这在任何方面都不太可能有帮助。
在IE9或IE8中根本没有效果。
它将在IE10和IE11中产生影响,但这种影响将使浏览器进入向后兼容模式,这基本上意味着你要告诉IE10和更高版本关闭它们的一些新功能,假装是IE9。
这真的没有任何意义;事实上,它可能弊大于利,所以我建议完全删除这行代码。
如果必须有一个X-UA-Compatible
标志,那么它的唯一合理值是IE=edge
。这将强制所有IE版本使用它们可用的最佳模式。无论如何,在大多数情况下,这是默认的,但在少数情况下,如果默认是其他情况,这可能会有所帮助。
但你在这里抱怨的真正问题是性能,我可以明确地告诉你,这与X-UA-Compatible
标志完全无关——正如我所说,你设置它的方式无论如何都不会对IE8产生任何影响,所以这并不是减慢速度的原因。
最终,IE8的问题可能归结为一个简单的事实,即它只是一个比后来版本慢得多的浏览器。你可能根本无法让IE8发挥出足够好的性能来实现你想要的目标。
IE9和IE10要好得多,所以你应该能够通过一些调整从中获得合理的性能,所以你最好的希望可能是进行一些性能调整。
性能测试的最佳选择是升级到IE11,它有比IE10更好的开发工具,包括一些非常好的分析网站性能的工具。
性能调优本身就是一个大话题(超出了这个答案的范围),但最终目标是找出造成最大瓶颈的原因,并解决这些问题。在大多数情况下,通常只有一两个主要问题会阻碍一切,处理好它们通常就足以产生影响。
因此,我的建议是:下载IE11,并在新的开发工具中尝试新的性能测试功能。希望这足以让你开始,但如果你仍然找不到问题,试着问一个更具体的问题,关于你的代码中的某个特定部分为什么慢。
我建议的另一件事是,也许可以尝试减少像jQuery这样的库的使用。
jQuery非常有用,但它确实会对性能产生影响。尽可能切换到本机Javascript。
如果你做不到,试着减少你打同一个电话的次数。例如:
$("#background1").x(($("#background1").x() + smallStarSpeed +PLAYGROUND_WIDTH) % (2 * PLAYGROUND_WIDTH) - PLAYGROUND_WIDTH);
这会调用$("#background1")
两次。改为:
var $bg1 = $("#background1");
$bg1.x(($bg1.x() + smallStarSpeed +PLAYGROUND_WIDTH) % (2 * PLAYGROUND_WIDTH) - PLAYGROUND_WIDTH);
更好的是,如果您可以使用document.getElementByTagName
而不是jQuery,您将为自己节省更多的性能。
我还注意到您在代码中重复了一些计算。显然,如果你能整理一下以减少重复,这也会有所帮助。
我希望这能给你一些思考的方向。
Put <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE9" >
在你的html头标签中,然后尝试。打开兼容性视图会将IE转换为IE8渲染。
http://html5test.com/compare/browser/ie08/chrome28/ff22.html
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