// forked from ish_xxxx's みじん斬り
/**
* SwordsEffect Scratch
* by ish-xxxx
*/
package {

import flash.display.*;
    import flash.filters.*;
	import flash.events.*;
	import flash.geom.*;
	import caurina.transitions.*;
        
    [SWF(frameRate=45, backgroundColor=0x020202)]
        
	public class Swords extends Sprite {

//CONSTANTS/////////////////////////////
		private const MAIN_BG_COLOR:uint=0x2;
		private const MAIN_BG_ALPHA:Number=1.0;
		private const SWORD_ALPHA:Number=0.5;
		private const SWORD_EDGE:uint=5;
		private const ATTACK_SPEED:uint=5;
		private const ATTACK_INTERVAL:uint=2;
		private const ATTACK_TRANSITION:Function=Equations.easeInOutExpo;
		private const ATTACK_END_TRANSITION:Function=Equations.easeOutExpo;

//VARS//////////////////////////////////
		private var count:uint=0;

public function Swords():void {
			init();
		}

private function init():void {
			setup();
		}

private function setup():void {
			stage.addEventListener(Event.ENTER_FRAME,update,false,0,false);
		}

private function update(ev:Event):void {
			if (count % ATTACK_INTERVAL == 0) {
				var sp:Sprite=new Sprite  ;
				var gra:Graphics=sp.graphics;
				var color:uint=getColor();
				gra.beginFill(color,SWORD_ALPHA);
				gra.drawRoundRect(0,0,1,SWORD_EDGE,SWORD_EDGE);
				gra.endFill();
				sp.x=Math.random() * stage.stageWidth | 0;
				sp.y=Math.random() * stage.stageHeight | 0;
				var ranX:uint=Math.random() * stage.stageWidth | 0;
				var ranY:uint=Math.random() * stage.stageHeight | 0;
				var cp:Point=new Point(sp.x,sp.y);
				var tp:Point=new Point(ranX,ranY);
				var dist:Number=Point.distance(cp,tp);
				var ranScale:uint=dist;
				var rad:Number=getRadian(tp,cp);
				sp.rotation=Radian2Degree(rad);
				sp.alpha=0;
                                sp.filters = [getBlur()];
				addChild(sp);
				Tweener.addTween(sp,{alpha:1,scaleX:ranScale,time:ATTACK_SPEED / 10,transition:ATTACK_TRANSITION});
				Tweener.addTween(sp,{x:tp.x,y:tp.y,scaleX:0,alpha:0,delay:ATTACK_SPEED / 10,time:ATTACK_SPEED / 5,transition:ATTACK_END_TRANSITION,onComplete:kill,onCompleteParams:[sp]});
			}
			count++;
		}

private function getColor():uint {
			var ranR:String=String(uint(Math.random() * 255 | 0));
			var ranG:String=String(uint(Math.random() * 255 | 0));
			var ranB:String=String(uint(Math.random() * 255 | 0));
			var res:uint=uint(ranR + ranG + ranB);
			return res;
		}

private function getBlur() : BlurFilter{
			var b:BlurFilter = new BlurFilter();
			b.blurX = Math.random() * 10 | 0;
			b.blurY = Math.random() * 10 | 0;
			b.quality = BitmapFilterQuality.LOW;
			return b
		}

private function kill(target:Sprite):void {
			
(target);
			target=null;
		}

private function getRadian(tp:Point,cp:Point):Number {
			var dx:Number=tp.x - cp.x;
			var dy:Number=tp.y - cp.y;

return Math.atan2(dy,dx);
		}
		private function Radian2Degree(radian:Number):Number {
			return radian * 180 / Math.PI;
		}

}
}

forked from: みじん斬り