使用bitmapData简单实现涂鸦中的橡皮功能(as3)

之前有网站转载过blog里一篇
使用bitmapData简单实现涂鸦中的橡皮功能
由于里边没介绍..其实代码是as2的..后来一些网站误传为as3的代码..
今天把之前的代码改成了as3的代码..重新发上来..有需要的朋友可以看看...

PS:直接另存了以前的源码..所以代码还是写帧里...

查看源码打印关于此插件

01.//主容器

02.var main:Sprite = new Sprite();

03.main.mouseEnabled = false;

04.addChild(main)

05.//临时容器(所有操作都将先画在临时容器里,再进行"画"或"擦")

06.var mc:Sprite = new Sprite()

07.main.addChild(mc)

08.//保存最终画出来的内容的bitmapdata

09.var content:BitmapData = new BitmapData(550,400,true,0x00FFFFFF);

10.//把content显示出来

11.var show:Bitmap = new Bitmap(content)

12.main.addChildAt(show,0)

13.  

14.//默认选中画笔

15.var action:Number = 0

16.txt.text = "当前选中:画笔"

17.  

18.mc_move.addEventListener(MouseEvent.MOUSE_DOWN,startDraw)

19.a.addEventListener(MouseEvent.CLICK,changeAction)

20.b.addEventListener(MouseEvent.CLICK,changeAction)

21.function changeAction(e:MouseEvent):void

22.{

23.    if(e.target.name == "a")

24.    {

25.        action = 0

26.        txt.text = "当前选中:画笔"

27.        mc.visible = true

28.    }else

29.    {

30.        action = 1

31.        txt.text = "当前选中:橡皮"

32.        mc.visible = false

33.    }

34.}

35.function startDraw(e:MouseEvent):void

36.{

37.    mc.graphics.lineStyle(20,cp.selectedColor);

38.    mc.graphics.moveTo(mouseX,mouseY);

39.    mc_move.addEventListener(MouseEvent.MOUSE_MOVE,drawing);

40.    stage.addEventListener(MouseEvent.MOUSE_UP,stopDraw);

41.}

42.function stopDraw(e:MouseEvent):void

43.{

44.    if(action!=1)content.draw(mc,new Matrix(),new ColorTransform(),BlendMode.NORMAL,new Rectangle(0,0,550,400))

45.    mc.graphics.clear()

46.    mc_move.removeEventListener(MouseEvent.MOUSE_MOVE,drawing);

47.    stage.removeEventListener(MouseEvent.MOUSE_UP,stopDraw);

48.}

49.function drawing(e:MouseEvent):void

50.{

51.    mc.graphics.lineTo(mouseX,mouseY)

52.    if(action==1)content.draw(mc,new Matrix(),new ColorTransform(),BlendMode.ERASE)

53.    e.updateAfterEvent()

54.}

//原贴地址

http://blog.l4cd.net/post-old-67.html