matrix学习

1 //Copyright © 2008. Http://L4cd.Net All Rights Reserved.
2 //使用方法也很简单~
3 //import net.L4cd.iPointRegister;
4 //iPointRegister.register(mc,new Point(新的旋转点x,新的旋转点y));
5 //iPointRegister.rotate(mc,角度);
6
7 //需要注意的点..使用register注册新的点时..是当前的状态为去注册旋转点,
8 //就是说如果当前mc已经转了一定的角度..重新注册旋转点..与没旋转过的mc注册旋转点时位置会不一样..
9 //这里是需要注册的地方..
10
11 package net.L4cd
12 {
13     import flash.display.DisplayObject;
14     import flash.geom.Point;
15     import flash.utils.Dictionary;
16
17
18     /**
19      * 动态“修改”注册点,实现任意点旋转
20      *
21      * @author L4cd.Net
22      * @playerversion Flash player 9
23      * @langversion 3.0
24      * @version 2008/9/1 16:28
25      */
26     public class iPointRegister
27     {
28         static private var _target:Dictionary;
29         public function iPointRegister()
30         {
31
32         }
33
34         /**
35          * 注册旋转点
36          *
37          * @param    target  目标
38          * @param    point   新注册点
39          */
40         static public function register(target:DisplayObject, point:Point):void
41         {
42             if (!_target)_target = new Dictionary();
43             _target[target] = { };
44             var s:Object = _target[target];
45             s["x"] = point.x;
46             s["y"] = point.y;
47             s["r"] = Point.distance(new Point(target.x, target.y), new Point(s["x"], s["y"]));
48             s["d"] = Math.asin(Math.abs(s["y"] - target.y)/s["r"])/(Math.PI / 180);
49             if (s["x"] > target.x && s["y"] < target.y)
50             {
51                 s["d"] = 180 - s["d"];
52             }else if (s["x"] > target.x && s["y"] > target.y)
53             {
54                 s["d"] += 180;
55             }else if (s["x"] < target.x && s["y"] > target.y)
56             {
57                 s["d"] = 360 - s["d"];
58             }
59         }
60
61         /**
62          * 取消注册
63          *
64          * @param    target  目标
65          */
66         static public function unregister(target:DisplayObject):void
67         {
68             if (!_target) return;
69             if (!_target[target]) return;
70             _target[target] = null;
71         }
72
73         /**
74          * 以新的注册点旋转
75          *
76          * @param    target    目标
77          * @param    rotation  角度
78          */
79         static public function rotate(target:DisplayObject,rotation:Number):void
80         {
81             if (!_target) return;
82             if (!_target[target]) return;
83             var s:Object = _target[target];
84             var r:Number = rotation - target.rotation;
85             target.rotation = rotation;
86             s["d"] += r;
87             target.x = s["x"] + s["r"] * Math.cos((s["d"]) * Math.PI / 180);
88             target.y = s["y"] + s["r"] * Math.sin((s["d"]) * Math.PI / 180);
89         }
90     }
91
92 }

1 import net.L4cd.iPointRegister;
2
3 var s:Array = [];
4 var sh:Sprite = new Sprite()
5 addChild(sh)
6
7
8 var a:Sprite = new Sprite();
9 a.mouseEnabled = false;
10 a.alpha = 0.5
11 a.graphics.beginFill(0xFF9900);
12 a.graphics.drawRect(0,0,100,100);
13 a.graphics.endFill();
14 a.x = 150;
15 a.y = 150;
16 addChild(a);
17 var f:TextField = new TextField();f.htmlText = "<font size='90'>国</font>";
18 var bit:BitmapData = new BitmapData(100,100,true,0x00FFFFFF);
19 bit.draw(f)
20 a.addChild(new Bitmap(bit));
21
22
23
24
25 draw(100,100)
26 function draw(x:Number,y:Number):void
27 {
28     s["x"] = x;
29     s["y"] = y;
30     graphics.clear()
31     graphics.lineStyle(1)
32     graphics.moveTo(0,y)
33     graphics.lineTo(550,y)
34     graphics.moveTo(x,0)
35     graphics.lineTo(x,400)
36
37     sh.graphics.clear()
38     sh.graphics.lineStyle(1)
39     sh.graphics.moveTo(s["x"],s["y"])
40     sh.graphics.lineTo(a.x,a.y)
41 }
42
43
44
45 bt.addEventListener(MouseEvent.CLICK,click)
46 function click(e:MouseEvent):void
47 {
48     if(e.target["label"] == "start")
49     {
50         e.target["label"] = "stop";
51         iPointRegister.register(a,new Point(s["x"],s["y"]));
52         addEventListener(Event.ENTER_FRAME,r);
53         stage.removeEventListener(MouseEvent.MOUSE_DOWN,d)
54     }else
55     {
56         e.target["label"] = "start";
57         removeEventListener(Event.ENTER_FRAME,r);
58         stage.addEventListener(MouseEvent.MOUSE_DOWN,d)
59     }
60
61 }
62 stage.addEventListener(MouseEvent.MOUSE_DOWN,d)
63 function d(e:MouseEvent):void
64 {
65     if(e.currentTarget!=e.target)return;
66     stage.addEventListener(MouseEvent.MOUSE_MOVE,m)
67     stage.addEventListener(MouseEvent.MOUSE_UP,u)
68     m(e)
69 }
70 function m(e:MouseEvent):void
71 {
72     draw(e.stageX,e.stageY)
73 }
74 function u(e:MouseEvent):void
75 {
76     stage.removeEventListener(MouseEvent.MOUSE_MOVE,m)
77     stage.removeEventListener(MouseEvent.MOUSE_UP,u)
78 }
79
80
81
82
83 function r(e:Event):void
84 {
85     iPointRegister.rotate(a,a.rotation+1);
86     sh.graphics.clear()
87     sh.graphics.lineStyle(1)
88     sh.graphics.moveTo(s["x"],s["y"])
89     sh.graphics.lineTo(a.x,a.y)
90 }

1 var a:MovieClip =new mc();
2 addChild(a);
3 var myMatrix:Matrix=a.transform.matrix;//复制矩阵
4
5 //计算坐标原点
6
7 var tempx:Number =a.x+20;
8
9 var tempy:Number =a.y+20;
10
11 //对自定义Matrx进行操作
12 //myMatrix.translate(-tempx,-tempy);
13 //myMatrix.identity ()
14 myMatrix.tx=myMatrix.ty=0;
15 myMatrix.translate(-20,-20);
16
17 myMatrix.rotate(2 * Math.PI * (30 / 360));
18
19 myMatrix.translate(tempx,tempy);
20
21 //应用变换到显示对象
22
23 a.transform.matrix = myMatrix;
24

import fl.motion.MatrixTransformer;
fang.addEventListener(MouseEvent.CLICK,rota);
function rota(e:MouseEvent) {
    var m:Matrix=e.currentTarget.transform.matrix;
    //MatrixTransformer.rotateAroundInternalPoint(m,e.currentTarget.mouseX,e.currentTarget.mouseY,1);
    MatrixTransformer.rotateAroundExternalPoint(m,a.x,a.y,1);
    fang.transform.matrix=m;
}

as3学习

______学习flash的笔记