[ActionScript 3.0] AS3实现3D旋转

  1 package
  2 {
  3     import flash.display.Bitmap;
  4     import flash.display.BitmapData;
  5     import flash.display.DisplayObject;
  6     import flash.display.Sprite;
  7     import flash.events.MouseEvent;
  8     import flash.events.TimerEvent;
  9     import flash.geom.PerspectiveProjection;
 10     import flash.geom.Point;
 11     import flash.geom.Vector3D;
 12     import flash.utils.Timer;
 13     import flash.utils.getDefinitionByName;
 14
 15     /**
 16      * @author Frost.Yen
 17      * @E-mail [email protected]
 18      * @create 2015-8-13 下午4:03:27
 19      *
 20      */
 21     [SWF(width="1024",height="768")]
 22     public class RotateMain extends Sprite
 23     {
 24         [Embed(source="assets/001.png")]
 25         private var _img0:Class;
 26         [Embed(source="assets/002.png")]
 27         private var _img1:Class;
 28         [Embed(source="assets/003.png")]
 29         private var _img2:Class;
 30         [Embed(source="assets/004.png")]
 31         private var _img3:Class;
 32         [Embed(source="assets/005.png")]
 33         private var _img4:Class;
 34         [Embed(source="assets/006.png")]
 35         private var _img5:Class;
 36         [Embed(source="assets/007.png")]
 37         private var _img6:Class;
 38         [Embed(source="assets/007.png")]
 39         private var _img7:Class;
 40
 41         private var _num:int = 7;
 42         private var _radius:Number = 300;
 43         private var _itemArr:Array = [];
 44         private var _speed:Number = 1;
 45         private var _ratio:Number = 0.25;//系数
 46         private var _downX:Number;
 47         private var _container:Sprite;
 48         private var _timer:Timer = new Timer(20);
 49         public function RotateMain()
 50         {
 51             this.graphics.beginFill(0,1);
 52             this.graphics.drawRect(0,0,1024,768);
 53             this.graphics.endFill();
 54             initViews();
 55             initEventListeners();
 56         }
 57         private function initViews():void
 58         {
 59             _container = new Sprite();
 60             _container.x = 1024*0.5;
 61             _container.y = 768*0.5-200;
 62             _container.z = 0;
 63             this.addChild(_container);
 64             for(var i:int = 0;i<_num;i++){
 65                 var angle:Number = Math.PI * 2/_num*i;
 66                 var sp:Sprite = new Sprite();
 67                 //var img:Class = getDefinitionByName("RotateMain__img"+i) as Class;
 68                 var bmp:Bitmap = new this["_img"+i]();
 69
 70                 sp.x = Math.cos(angle)*_radius;
 71                 sp.z = Math.sin(angle)*_radius;
 72                 sp.addChild(bmp);
 73                 _container.addChild(sp);
 74                 _itemArr.push(sp);
 75             }
 76             swapItems();
 77             _timer.addEventListener(TimerEvent.TIMER,onTimer);
 78             _timer.start();
 79
 80         }
 81         private function initEventListeners():void
 82         {
 83             stage.addEventListener(MouseEvent.MOUSE_DOWN,onDown);
 84         }
 85         private function onDown(e:MouseEvent):void
 86         {
 87             stage.addEventListener(MouseEvent.MOUSE_MOVE,onMove);
 88             stage.addEventListener(MouseEvent.MOUSE_UP,onUp);
 89             _timer.stop();
 90             _downX = mouseX;
 91         }
 92         private function onMove(e:MouseEvent):void
 93         {
 94             _speed = (_downX-mouseX)*0.01;
 95             _container.rotationY += _ratio * _speed;
 96             var p:PerspectiveProjection = new PerspectiveProjection();
 97             p.fieldOfView = 55;
 98             p.projectionCenter = new Point(512,-100);
 99             _container.transform.perspectiveProjection = p;
100             swapItems();
101
102         }
103         private function onUp(e:MouseEvent):void
104         {
105             stage.removeEventListener(MouseEvent.MOUSE_MOVE,onMove);
106             stage.removeEventListener(MouseEvent.MOUSE_UP,onUp);
107             _timer.start();
108         }
109         private function onTimer(e:TimerEvent):void
110         {
111             if(_speed < -1){
112                 _speed+=0.02;
113                 if(_speed >=-1){
114                     _speed = -1;
115                 }
116             }else if(_speed >1){
117                 _speed-=0.02;
118                 if(_speed <=1){
119                     _speed = 1;
120                 }
121             }else if(_speed>-1&&_speed<0){
122                 _speed-=0.02;
123             }else if(_speed<1&&_speed>0){
124                 _speed+=0.02;
125             }
126             _container.rotationY += _ratio *_speed ;//trace(_ratio,_speed);
127             var p:PerspectiveProjection = new PerspectiveProjection();
128             p.fieldOfView = 55;
129             p.projectionCenter = new Point(512,-100) ; //视点
130             _container.transform.perspectiveProjection = p;
131             swapItems();
132         }
133         private function swapItems():void
134         {
135             _itemArr.sort(swapDepth);
136             for(var i:int = 0; i < _itemArr.length; i++ )
137             {
138                 _container.addChildAt(_itemArr[i] as Sprite,i);
139                 (_itemArr[i] as Sprite).rotationY -= _ratio *_speed;
140             }
141         }
142         private function swapDepth(objA:DisplayObject,objB:DisplayObject):int
143         {
144             var posA:Vector3D = objA.transform.matrix3D.position ;
145             posA = _container.transform.matrix3D.deltaTransformVector(posA);
146             var posB:Vector3D = objB.transform.matrix3D.position;
147             posB = _container.transform.matrix3D.deltaTransformVector(posB);
148             return posB.z - posA.z;
149         }
150     }
151 }