package { //phlashers year end AS3 contest 2009 //swarm follows pointer //http://www.phlashers.com //hold down mouse button = ultraelectromagnetic storm import flash.display.* import flash.events.* import flash.geom.* public class SG extends MovieClip{ public var bd:BitmapData = new BitmapData(500,480,true,0x00000000) public var bd2:BitmapData = new BitmapData(500,480,true,0xFF000000) public var bmp:Bitmap = new Bitmap(bd) public var bmp2:Bitmap = new Bitmap(bd2) public var m:Matrix = new Matrix() public var pA:Array = new Array() public var sS:int = 200 public var swm:BitmapData = new BitmapData(3,3) public var mkr:Sprite = new Sprite() public static var rpl:Boolean = false public static var bP:Number = .001 public function SG() { addEventListener(Event.ENTER_FRAME,rtn,false,0,true) stage.addEventListener(MouseEvent.MOUSE_DOWN,rplSwm,false,0,true) stage.addEventListener(MouseEvent.MOUSE_UP,attSwm,false,0,true) addChild(bmp2) addChild(bmp) for (var i:int =0; i<sS;i++) { aSW(mkr.x,mkr.y,mkr).life = -1 } } public function rtn(e:Event):void { var cTrn:ColorTransform = new ColorTransform() cTrn.alphaMultiplier = .9 bd.lock() bd2.lock() bd.colorTransform(bd.rect,cTrn) prtn() mkr.x = mouseX mkr.y = mouseY bd.unlock() bd2.unlock() } protected function prtn():void { for (var i:String in pA) { var p:SW = pA[i] p.rtn() if (p.x > 500) { p.x=500 }else if (p.x <0) { p.x=0 } if (p.y > 480) { p.y=480 }else if (p.y <0) { p.y=0 } p.tP.x = mkr.x p.tP.y= mkr.y if (Math.random() < bP) { p.r = 20+ Math.random()*100 p.g = 30+ Math.random()*100 p.b = 150 + Math.random()*100 var s:SW = pA[Math.floor(Math.random() * pA.length)] var b:Sprite = sB(s.x,s.y,p.x,p.y,-s.col) m.tx = s.x m.ty = s.y bd.draw(b,m) } var pt:Point = new Point(p.x-2,p.y-2) var cTrn:ColorTransform = new ColorTransform() cTrn.color = p.col swm.colorTransform(swm.rect, cTrn) bd.copyPixels(this[p.img],this[p.img].rect,pt,null,null,true) } } protected function aSW(xC:Number = 0,yC:Number = 0,tObj:Object = null):SW { var p:SW = new SW() pA.push(p) p.x = xC p.y = yC p.tObj = tObj return p } public function rplSwm(e:Event):void { bP = .1 SG.rpl = true } public function attSwm(e:Event):void { bP = .001 SG.rpl = false } protected function sB (xC1:Number,yC1:Number,xC2:Number,yC2:Number,col:uint=0xFF0000):Sprite { var freq:Number=20; var amp:Number=10; var dur:uint=1; var fx:Sprite=new Sprite (); fx.x=xC1; fx.y=yC1; var xd:Number=xC2 - xC1; var yd:Number=yC2 - yC1; var x1:Number =0; var y1:Number =0 var x2:Number =xd; var y2:Number =yd var xseg:Number=Math.round(xd / freq); var yseg:Number=Math.round(yd / freq); var ref:Object = fx.graphics; ref.moveTo (x1,y1); ref.lineStyle (1,col,1); var i:Number=0; for (i=1; i < freq; i++) { var xpt:Number=x1 + i * xseg + Math.random() * amp - amp / 2; var ypt:Number=y1 + i * yseg + Math.random() * amp - amp / 2; ref.lineTo (xpt,ypt); } ref.lineTo (x2,y2); return fx } } } import flash.geom.Point dynamic class SW{ public var rR:Number = 20 public var sp:Number = 5 public var a:Number = 255 public var r:Number = 255 public var g:Number = 255 public var b:Number = 255 public var r2:Number = 255 public var g2:Number = 0 public var b2:Number = 0 public var x:Number = 0 public var y:Number = 0 public var rot:Number = 0 public var col:uint = 0x000000; public var xS:Number = Math.cos(rot * (Math.PI/180)) public var yS:Number = Math.sin(rot * (Math.PI/180)) public var split:Number = 100 public var tR:Number = 0 public var tP:Point public var life:Number = 100 public var jnk:Boolean = false public var img:String = "swm" public function SW() { rot = Math.random() * 360 tP = new Point(0,0) img = "swm" r = 0 g = 0 b = 0 } public function aCl():void { col = (r << 16 | g << 8 | b) } public function rtn():void { var dx:Number = tP.x -x var dy:Number =tP.y -y var d:Number = Math.abs(dx) + Math.abs(dy) var a:Number = Math.atan2(dy,dx) r -= (r-r2)/20 g -= (g-g2)/20 b -= (b-b2)/20 if (!SG.rpl) { tR = a * (180/Math.PI) }else{ tR = (a * (180/Math.PI)) + 180 } if (tR - rot > 180) { tR -= 360; }else if (rot - tR > 180){ tR += 360; } if (rot-tR == 0) { }else{ rot -= (Math.abs(rot - tR)/(rot - tR)) * (Math.random() * rR); } xS = sp * Math.cos(rot * (Math.PI/180)) yS = sp * Math.sin(rot * (Math.PI/180)) x+=xS y+=yS b += d/10 if (b > 255) { b = 255 } aCl() } }