【教程】使用BitmapData来管理和进行纸牌游戏

导读：
　　I have already published a tutorial about BitmapData in the post Shuffle an image with BitmapData, but this time I want to show you how to manage a deck of cards using BitmapData.
　　Managing a deck of cards is very useful because there are tons of card games you can publish once you have a deck of cards in your library.

我在前面的教程中曾讲过如何使用bitmapdata来洗牌，这回我要向大家展示的是，如何使用这个类来管理一堆的卡片

管理一堆的卡片式很有用的事情，因为库里有了这个之后，你就可以制作任何的卡片游戏了

　　The first thing you need is an image with all cards like this one:
　　The image is scaled down for blogging reasons, but you can view/download it at its original size here.
　　Now, with the same method seen in Shuffle an image with BitmapData, I'll cut off all cards starting from the original image.
　　I am publishing some raw actionscript because this is just a prototype, but a full tutorial will come shortly.

首先你得有个象下面这样的卡片，当然因为是博客的原因这幅图片被缩放了，当然你可以追随链接下载其原始的尺寸。

现在就像在前面的一篇教程里见到的那样，你可以通过使用Bitmapdata类来，从这个图片中切出所有的卡片。我将发布关于这个问题的一些原始的as脚本，当然将会在后记的章节中给出全面的教程
　　The prototype is about the simplest card game ever: you draw a card and have to say if the next card will be higher on lower than the card you have on the table.
　　Being a prototype it's not complete yet, but I want to share this code to you.

这个简单的原型，大概是所有的纸牌中最简单的了：你抽出一张牌，然后猜测接下来发的这张牌是比桌上这张大呢？还是小呢？虽然并没有完成，但是我愿意和你分享这段代码
　　ACTIONSCRIPT:
　　importflash.display.BitmapData
　　importflash.geom.Rectangle
　　importflash.geom.Point
　　importflash.filters.DropShadowFilter
　　vardistance:Number= 4
　　varangleInDegrees:Number= 45
　　varcolor:Number= 0x000000;
　　varalpha:Number= .5
　　varblurX:Number= 4
　　varblurY:Number= 4
　　varstrength:Number= 1
　　varquality:Number= 3
　　varinner:Boolean= false
　　varknockout:Boolean= false
　　varhideObject:Boolean= false
　　varmy_shadow_filter:DropShadowFilter = newDropShadowFilter(distance, angleInDegrees, color, alpha, blurX, blurY, strength, quality, inner, knockout, hideObject)
　　big_picture = BitmapData.loadBitmap("cardz")
　　_root.attachMovie("table","table",_root.getNextHighestDepth())
　　_root.attachMovie("higher","higher",_root.getNextHighestDepth())
　　_root.attachMovie("lower","lower",_root.getNextHighestDepth())
　　_root.createEmptyMovieClip("big_pic_obj",_root.getNextHighestDepth())
　　big_pic_obj.attachBitmap(big_picture,_root.getNextHighestDepth())
　　big_pic_obj._visible= false
　　pictures = newArray()
　　sequence = newArray()
　　Array.prototype.shuffle= function(){
　　for(x=0x<52x++){
　　varfrom = Math.floor(Math.random()*52)
　　varto = this[x]
　　this[x]= this[from]
　　this[from]= to;
　　}
　　}
　　for(x=0x<52x++){
　　card = _root.createEmptyMovieClip("small_pic_obj_"+x, _root.getNextHighestDepth())
　　sequence[x]= x;
　　small_picture = newBitmapData(79, 123)
　　card.attachBitmap(small_picture,_root.getNextHighestDepth())
　　small_picture.copyPixels(big_picture,newRectangle(0+(x%13)*79, 0+Math.floor(x/13)*123, 79, 123),newPoint(0, 0))
　　card._visible= false
　　card.filters= newArray(my_shadow_filter)
　　card.onEnterFrame= function(){
　　switch(this.action){
　　case"come":
　　this._x+= 40
　　if(this._x>210){
　　this._x= 210
　　this.action= "stay"
　　}
　　break
　　case"move":
　　this._x+= 20
　　if(this._x>310){
　　this._x= 310
　　this.action= "dissolve"
　　}
　　break
　　case"dissolve":
　　this._alpha-= 4
　　if(this._alpha<0){
　　can_draw=true
　　this.removeMovieClip()
　　}
　　break
　　}
　　}
　　}
　　sequence.shuffle()
　　cards_drawn = 0
　　can_draw = true
　　draw_card()
　　higher.onRelease= function(){
　　if(can_draw){
　　can_draw=false
　　draw_card()
　　}
　　}
　　lower.onRelease= function(){
　　if(can_draw){
　　can_draw=false
　　draw_card()
　　}
　　}
　　functiondraw_card(){
　　_root["small_pic_obj_"+sequence[cards_drawn]]._x= 0
　　_root["small_pic_obj_"+sequence[cards_drawn]]._y= 30
　　_root["small_pic_obj_"+sequence[cards_drawn]]._visible= true
　　_root["small_pic_obj_"+sequence[cards_drawn]].action= "come"
　　_root["small_pic_obj_"+sequence[cards_drawn-1]].action= "move"
　　cards_drawn++;
　　}
　　and the result is...
　　I think simple and stupid games like this one can have a good replay value if I provide a high score table like in Christmas Couples, another simple game that entered in the "million games played" club.
　　But I will talk about it in the next post about the experiment, meanwhile take the source code.

在接下来的博客中我们还会继续讨论这个问题，不要错过这段代码
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本文转自
http://www.emanueleferonato.com/2007/12/26/using-bitmapdata-to-manage-a-deck-of-cards/