AS3 SpringEarthShakeEffectTest ---- 弹性振动效果类

SpringEarthShakeEffectTest类：代码+注释：

下载运行实例：SpringEarthShakeEffectTest.rar

package
{
	import controlsEvents.DirectionPickerEvent;
	import controlsEvents.NumericeUpDownEvent;
	
	import flash.display.Bitmap;
	import flash.display.Loader;
	import flash.display.MovieClip;
	import flash.display.Sprite;
	import flash.display.StageAlign;
	import flash.display.StageScaleMode;
	import flash.events.Event;
	import flash.events.KeyboardEvent;
	import flash.geom.Point;
	import flash.net.URLRequest;
	import flash.net.getClassByAlias;
	import flash.system.ApplicationDomain;
	import flash.system.LoaderContext;
	import flash.utils.getDefinitionByName;
	import flash.utils.getTimer;
	/**
	 * 弹性振动效果
	 * @author Jave.Lin
	 */	
	public class SpringEarthShakeEffectTest extends Sprite
	{
		private var _sp:Sprite;
		
		private var _frictionX:Number=.3;
		private var _frictionY:Number=.3;
		private var _springX:Number=3;
		private var _springY:Number=3;
		
		private var _earthMass:Number=60;//
		private var _hitterMass:Number=100;
		
		private var _vx:Number=0;
		private var _vy:Number=0;
		
		private var _spSourceX:Number=0;
		private var _spSourceY:Number=0;
		
		private var _mc:MovieClip;
		
		private var _amplitude:Number=100;//振幅
		
		private var _duration:Number=100;//单位：毫秒
		private var _startShakeTime:Number=0;//开始振动的计时
		private var _shakeDirection:Number=0;//振动方向，单位：度(0~360)
		private var _shakeOffsetX:Number=2;//X方向的振动抖动偏移量
		private var _shakeOffsetY:Number=2;//Y方向的振动抖动偏移量
		
		private var _directionNUD:NumericUpDown;
		
		[SWF(width="1200",height="720")]
		public function SpringEarthShakeEffectTest()
		{
			super();
			
			stage.frameRate=60;
			stage.color=0xccccaa;
			stage.align=StageAlign.TOP_LEFT;
			stage.scaleMode=StageScaleMode.NO_SCALE;
			
			_sp=new Sprite();
			addChild(_sp);
			
			//			_sp.graphics.beginFill(0xff0000);
			//			_sp.graphics.drawCircle(0,0,20);
			//			_sp.graphics.endFill();
			//			
			//			_spSourceX=_sp.x=200;
			//			_spSourceY=_sp.y=100;
			
			stage.addEventListener(KeyboardEvent.KEY_DOWN,onKeyDownHandler);
			
			var loader:Loader=new Loader();
			loader.contentLoaderInfo.addEventListener(Event.COMPLETE,onPicLoadedHandler);
			loader.load(new URLRequest("res/test1.jpg"),new LoaderContext(false, ApplicationDomain.currentDomain));
			
			var loader3:Loader=new Loader();
			loader3.contentLoaderInfo.addEventListener(Event.COMPLETE,onSwf3LoadedHandler);
			loader3.load(new URLRequest("res/vDropball.swf"),new LoaderContext(false, ApplicationDomain.currentDomain));
			
			var durationLable:Label=new Label();
			addChild(durationLable);
			durationLable.fontSize=15;
			durationLable.text="振动持续时间：(100~5000)毫秒";
			durationLable.x=100;
			durationLable.y=100;
			
			var durationNumericeUpDown:NumericUpDown=new NumericUpDown();
			addChild(durationNumericeUpDown);
			durationNumericeUpDown.fontColor=0;
			durationNumericeUpDown.maxValue=5000;
			durationNumericeUpDown.minValue=100;
			durationNumericeUpDown.x=durationLable.x+durationLable.width;
			durationNumericeUpDown.y=durationLable.y;
			durationNumericeUpDown.addEventListener(NumericeUpDownEvent.VALUE_CHANGED,ondurationNumericeUpDownValueChange);
			durationNumericeUpDown.curValue=100;
			
			var shakAmplitudeLable:Label=new Label();
			addChild(shakAmplitudeLable);
			shakAmplitudeLable.fontSize=15;
			shakAmplitudeLable.text="振幅：(100~2000)";
			shakAmplitudeLable.x=100;
			shakAmplitudeLable.y=120;
			
			var shakAmplitudeNumericeUpDown:NumericUpDown=new NumericUpDown();
			addChild(shakAmplitudeNumericeUpDown);
			shakAmplitudeNumericeUpDown.fontColor=0;
			shakAmplitudeNumericeUpDown.minValue=100;
			shakAmplitudeNumericeUpDown.maxValue=2000;
			shakAmplitudeNumericeUpDown.x=shakAmplitudeLable.x+shakAmplitudeLable.width;
			shakAmplitudeNumericeUpDown.y=shakAmplitudeLable.y;
			shakAmplitudeNumericeUpDown.addEventListener(NumericeUpDownEvent.VALUE_CHANGED,onshakAmplitudeNumericeUpDownValueChange);
			shakAmplitudeNumericeUpDown.curValue=100;
			
			var scaleXYLable:Label=new Label();
			addChild(scaleXYLable);
			scaleXYLable.fontSize=15;
			scaleXYLable.text="振动对象缩放比率：(0.1~1)";
			scaleXYLable.x=100;
			scaleXYLable.y=140;
			
			var scaleXYNUD:NumericUpDown=new NumericUpDown();
			addChild(scaleXYNUD);
			scaleXYNUD.fontColor=0;
			scaleXYNUD.minValue=0.1;
			scaleXYNUD.maxValue=1;
			scaleXYNUD.increment=0.01;
			scaleXYNUD.x=scaleXYLable.x+scaleXYLable.width;
			scaleXYNUD.y=scaleXYLable.y;
			scaleXYNUD.addEventListener(NumericeUpDownEvent.VALUE_CHANGED,onscaleXYNUDNumericeUpDownValueChange);
			scaleXYNUD.curValue=100;
			
			var sourceXLable:Label=new Label();
			addChild(sourceXLable);
			sourceXLable.fontSize=15;
			sourceXLable.text="振动对象x：(-1200~1200)";
			sourceXLable.x=100;
			sourceXLable.y=160;
			
			var sourceXNUD:NumericUpDown=new NumericUpDown();
			addChild(sourceXNUD);
			sourceXNUD.fontColor=0;
			sourceXNUD.minValue=-1200;
			sourceXNUD.maxValue=1200;
			sourceXNUD.increment=5;
			sourceXNUD.x=sourceXLable.x+sourceXLable.width;
			sourceXNUD.y=sourceXLable.y;
			sourceXNUD.addEventListener(NumericeUpDownEvent.VALUE_CHANGED,onsourceXNUDNumericeUpDownValueChange);
			sourceXNUD.curValue=100;
			
			var sourceYLable:Label=new Label();
			addChild(sourceYLable);
			sourceYLable.fontSize=15;
			sourceYLable.text="振动对象y：(-720~720)";
			sourceYLable.x=100;
			sourceYLable.y=180;
			
			var sourceYNUD:NumericUpDown=new NumericUpDown();
			addChild(sourceYNUD);
			sourceYNUD.fontColor=0;
			sourceYNUD.minValue=-720;
			sourceYNUD.maxValue=720;
			sourceYNUD.increment=5;
			sourceYNUD.x=sourceYLable.x+sourceYLable.width;
			sourceYNUD.y=sourceYLable.y;
			sourceYNUD.addEventListener(NumericeUpDownEvent.VALUE_CHANGED,onsourceYNUDNumericeUpDownValueChange);
			sourceYNUD.curValue=100;
			
			var directionLable:Label=new Label();
			addChild(directionLable);
			directionLable.fontSize=15;
			directionLable.text="振动方向：(0~360)";
			directionLable.x=100;
			directionLable.y=200;
			
			 var directionPicker:DirectionPicker=new DirectionPicker();
			 addChild(directionPicker);
			 directionLable.y+=directionPicker.radius;
			 directionPicker.x=directionLable.x+directionLable.width+directionPicker.radius+10;
			 directionPicker.y=directionLable.y+directionPicker.radius/2;
			 directionPicker.addEventListener(DirectionPickerEvent.DEGREE_CHANGED,ondirectionPickerDegreeChanged);
			
			_directionNUD=new NumericUpDown();
			addChild(_directionNUD);
			_directionNUD.fontColor=0;
			_directionNUD.minValue=0;
			_directionNUD.maxValue=360;
			_directionNUD.x=directionPicker.x+directionPicker.radius+10;
			_directionNUD.y=directionPicker.y-_directionNUD.height/2;
			_directionNUD.addEventListener(NumericeUpDownEvent.VALUE_CHANGED,ondirectionNUDValueChanged);
			directionPicker.degree=_directionNUD.curValue=1;
			directionPicker.degree=_directionNUD.curValue=0;
			
			var directionLb:Label=new Label("度");
			addChild(directionLb);
			directionLb.fontSize=15;
			directionLb.x=_directionNUD.x+_directionNUD.width;
			directionLb.y=_directionNUD.y;
		}
		
		private function ondirectionNUDValueChanged(e:NumericeUpDownEvent):void
		{
			_shakeDirection=e.value;
		}
		
		private function ondirectionPickerDegreeChanged(e:DirectionPickerEvent):void
		{
			_directionNUD.curValue=e.degree;
		}
		
		private function onsourceYNUDNumericeUpDownValueChange(e:NumericeUpDownEvent):void
		{
			_spSourceY=_sp.y=e.value;
		}
		
		private function onsourceXNUDNumericeUpDownValueChange(e:NumericeUpDownEvent):void
		{
			_spSourceX=_sp.x=e.value;
		}
		
		private function onscaleXYNUDNumericeUpDownValueChange(e:NumericeUpDownEvent):void
		{
			_sp.scaleX=_sp.scaleY=e.value;
		}
		
		private function onshakAmplitudeNumericeUpDownValueChange(e:NumericeUpDownEvent):void
		{
			_amplitude=e.value;
		}
		
		private function ondurationNumericeUpDownValueChange(e:NumericeUpDownEvent):void
		{
			_duration=e.value;
		}
		
		private function onSwf3LoadedHandler(e:Event):void
		{
			_mc=e.currentTarget.content as MovieClip;
		}
		
		private function onPicLoadedHandler(e:Event):void
		{
			var bmp:Bitmap=e.currentTarget.content as Bitmap;
			_sp.addChild(bmp);
			_sp.setChildIndex(bmp,0);
		}
		
		private function onKeyDownHandler(e:KeyboardEvent):void
		{
			//			trace(e.keyCode);//32 == sapce key
			if(e.keyCode==32)
			{
				//shake
				//				弹性公式: 
				//				vx += (targetX - sprite.x) * spring;//spring为弹性系数 
				//				vy += (targetY - sprite.y) * spring; 
				//				sprite.x += (vx *= friction);//friction为摩擦力 
				//				sprite.y += (vy *= friction);
				var c:Class=ApplicationDomain.currentDomain.getDefinition("vDropBall") as Class;
				
				var mc:MovieClip=new c() as MovieClip;
				mc.x=Math.random()*300+100;mc.y=Math.random()*400+100;
				mc.addFrameScript(mc.totalFrames-1,
					function():void
					{
						mc.addFrameScript(mc.totalFrames-1,null);
						_sp.removeChild(mc);
						mc=null;
						
						shake(_duration);
					});
				_sp.addChild(mc);
				_sp.setChildIndex(mc,_sp.numChildren-1);
			}
		}
		
		private function shake(duration:Number):void
		{
			_startShakeTime=getTimer();
			_duration=duration;
			
			if(!hasEventListener(Event.ENTER_FRAME))addEventListener(Event.ENTER_FRAME,onEnterFrameHandler);
		}
		
		private function clamp(value:Number,min:Number,max:Number):Number
		{
			if(valuemax)value=max;
			return value;
		}
		
		private function onEnterFrameHandler(e:Event):void
		{
			trace("get vx,vy",_vx,_vy);
			
			if((getTimer()-_startShakeTime)