prependRotation

/**
 * Copyright hacker_szoe51ih ( http://wonderfl.net/user/hacker_szoe51ih )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/kRLF
 */

/*クリックするとポインタの位置に合わせて視点が切り替わる*/

package {
    import flash.events.MouseEvent;
    import flash.events.Event;
    import flash.geom.*;
    import flash.display.Sprite;
     [SWF(frameRate="60", width="465", height="465",backgroundColor=0x000000)]
    public class FlashTest extends Sprite {
        
        public var square1:Square;
        
        public var W:Number=stage.stageWidth;
        public var H:Number=stage.stageHeight;
        
        public var nDeceleration:Number=0.05;
        public var nX:Number;
        
        public var myMatrix3D:Matrix3D;
        
       public var atPerspectiveProjection:PerspectiveProjection;
        
        public function FlashTest() {
           
            init();
            
        }
        
        public function init():void{
            
            atPerspectiveProjection = root.transform.perspectiveProjection;   
            
            square1=new Square(0xaaccff,100);
            addChild(square1);
            square1.x=W/2;
            square1.y=H/2;
            square1.z=0;
            
            nX=square1.x;
            
            myMatrix3D=new Matrix3D();
            myMatrix3D=square1.transform.matrix3D;
            
            stage.addEventListener(MouseEvent.CLICK,onClick);
            addEventListener(Event.ENTER_FRAME,enterFramer);
            
            
        }
        
        public function enterFramer(e:Event):void{
            
            var nRotationY:Number=(mouseX-nX)*nDeceleration;      
          
            myMatrix3D.prependRotation(nRotationY,Vector3D.Y_AXIS);
           
        }
        
        public function onClick(e:MouseEvent):void{
            
      atPerspectiveProjection.projectionCenter = new Point(mouseX,mouseY);
      
            
        }



    }
}


import flash.geom.Matrix;

import flash.display.*;
class Square extends Sprite {

    public var p:Sprite;

    public function Square(col:uint,len:Number):void {
        
        var myMatrix:Matrix=new Matrix();
        myMatrix.createGradientBox(len,len,0,0,0);
        var colors:Array=[0xffffff,0x356999,0x113388];
        var ratios:Array=[0,127,255];
        var alphas:Array=[1,1,1];
        p=new Sprite();
        p.graphics.lineStyle();
        p.graphics.beginGradientFill(GradientType.LINEAR,colors,alphas,ratios,myMatrix,SpreadMethod.PAD);
        p.graphics.drawRect(-len/2,-len/2,len,len);
        
        p.graphics.endFill();
        addChild(p);

    }
}