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package 
{ 
import flash.display.*;
import flash.geom.*;
import fl.transitions.*;
import fl.transitions.easing.*;
import fl.motion.BezierSegment;
 
 
public class MarsFly extends Transition 
{
	private var _origin_x:Number;
	private var _origin_y:Number;
	private var _origin_zoom:Number;
	private var _origin_alpha:Number;
	private var _start_x:Number = 0;
	private var _start_y:Number = 0;
	private var _control_x:Number = 0;
	private var _control_y:Number = 0;
	private var _start_zoom:Number = 2.5;
	private var _start_alpha:Number = 0;
	private var _bezier:BezierSegment;
 
    /**
     * @private
     */ 
	override public function get type():Class
	{
		return MarsFly;
	}
 
 
 
    /**
     * @private
	 * @param transParams - 参数zoom,alpha,x 起始点x,y 起始点y,cx 控制点x,cy 控制点y
     */ 
	function MarsFly (content:MovieClip, transParams:Object, manager:TransitionManager) 
	{
		super(content, transParams, manager);
		_origin_x = this.manager.contentAppearance.x;
		_origin_y = this.manager.contentAppearance.y;
		_origin_zoom = this.manager.contentAppearance.scaleX;
		_origin_alpha = this.manager.contentAppearance.alpha;
		_start_x = (transParams.x)?transParams.x:0;
		_start_y = (transParams.y)?transParams.y:0;
		_start_zoom = (transParams.zoom)?transParams.zoom:2.5;
		_start_alpha = (transParams.alpha)?transParams.alpha:0;
		_control_x = transParams.cx;
		_control_y = transParams.cy;
 
		_bezier = new BezierSegment(new Point(_start_x, _start_y),
									new Point(_start_x, _start_y),
									new Point(_control_x, _control_y),
									new Point(_origin_x, _origin_y)
									);
	}
 
    /**
     * @private
     */     
	override protected function _render(p:Number):void 
	{
		var point:Point = this._bezier.getValue(p);
		this._content.x = point.x;//this._start_x + (this._origin_x - this._start_x) * (Math.sin(p*Math.PI/2));
		this._content.y = point.y;//this._start_y + (this._origin_y - this._start_y) * (Math.cos((1-p)*Math.PI/2));
		this._content.alpha = this._start_alpha + (this._origin_alpha - this._start_alpha) *p;
		this._content.scaleX = this._content.scaleY = this._start_zoom + (this._origin_zoom - this._start_zoom) *p;
	}
 
}
 
 
 
}

调用时

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import fl.transitions.*;
import fl.transitions.easing.*;
 
btn1.addEventListener(MouseEvent.CLICK, function (event){
TransitionManager.start(img1_mc, {type:MarsFly, direction:Transition.OUT, duration:2, easing:Strong.easeOut, x:300,y:300, cx:300, cy: 0,zoom:5,alpha:0.1}); 														
														});
 
btn2.addEventListener(MouseEvent.CLICK, function (event){
TransitionManager.start(img1_mc, {type:MarsFly, direction:Transition.IN, duration:2, easing:Strong.easeOut,x:300,y:300, cx:300, cy: 0,zoom:0.1,alpha:0}); 																										});

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