package { import flash.display.Sprite; import flash.display.DisplayObject; import flash.display.StageAlign; import flash.display.StageScaleMode; import flash.events.Event; import flash.geom.Point; public class Main extends Sprite { private var camera:Point; private var brown:Point; public function Main() { camera = new Point(); brown = new Point(); addEventListener(Event.ADDED_TO_STAGE, initialize); addEventListener(Event.ENTER_FRAME, transitionCamera); addEventListener(Event.ENTER_FRAME, gogoBrown); } private function initialize(event:Event):void { stage.align = StageAlign.TOP_LEFT; stage.scaleMode = StageScaleMode.NO_SCALE; brown.x = Math.random() * stage.stageWidth; brown.y = Math.random() * stage.stageHeight; for (var i:uint = 25; i-- > 0;) { addChild(new Line(camera, brown)); } } private function transitionCamera(event:Event):void { camera.x += Math.random() * 2 > 1? (Math.random() * 20) / 20: -(Math.random() * 20) / 20; camera.y += Math.random() * 2.5 > 1? (Math.random() * 20) / 20: -(Math.random() * 20) / 20; camera.x /= 1.01; camera.y /= 1.01; } private function gogoBrown(event:Event):void { brown.x += Math.random() * 2 > 1? (Math.random() * 10): -(Math.random() * 10); brown.y += Math.random() * 2 > 1? (Math.random() * 10): -(Math.random() * 10); if (brown.x < 0 || brown.x > stage.stageWidth) brown.x = Math.random() * stage.stageWidth; if (brown.y < 0 || brown.y > stage.stageHeight) brown.y = Math.random() * stage.stageHeight; } public function remove(child:DisplayObject):void { removeChild(child); } } } import flash.display.Sprite; import flash.display.DisplayObject; import flash.events.Event; import flash.geom.Point; class Line extends Sprite { private var vx:Number; private var vy:Number; private var vs:Number; private var camera:Point; private var brown:Point; public function Line(wvp:Point, b:Point) { camera = wvp; brown = b; vs = Math.random() * 50 + 100; vx = 0; vy = 0; addEventListener(Event.ADDED_TO_STAGE, initialize); addEventListener(Event.REMOVED_FROM_STAGE, uninitialize); } private function initialize(event:Event):void { graphics.beginFill(0x000000); graphics.drawCircle(0, 0, 2); graphics.endFill(); x = Math.random() * stage.stageWidth; y = Math.random() * stage.stageHeight; addEventListener(Event.ENTER_FRAME, cruising); addEventListener(Event.ENTER_FRAME, tail); } private function uninitialize(event:Event):void { removeEventListener(Event.ADDED_TO_STAGE, initialize); removeEventListener(Event.REMOVED_FROM_STAGE, uninitialize); removeEventListener(Event.ENTER_FRAME, cruising); removeEventListener(Event.ENTER_FRAME, tail); } private function cruising(event:Event):void { vx += (brown.x - x) / vs; vy += (brown.y - y) / vs; vx /= 1.005; vy /= 1.005; x += vx / 1; y += vy / 1; } private function tail(event:Event):void { var tail:Tail = new Tail(this, camera); tail.x = x; tail.y = y; parent.addChild(tail); } } class Tail extends Sprite { private var vx:Number; private var vy:Number; private var target:DisplayObject; private var camera:Point; public function Tail(targetObject:DisplayObject, camera:Point) { target = targetObject; this.camera = camera; addEventListener(Event.ADDED_TO_STAGE, initialize); addEventListener(Event.REMOVED_FROM_STAGE, uninitialize); } private function initialize(event:Event):void { x = target.x; y = target.y; var radius:uint = 5; graphics.beginFill(0x000000); graphics.drawCircle(-radius / 2, -radius / 2, radius); graphics.drawCircle(-radius / 2, -radius / 2, radius / 3); graphics.endFill(); addEventListener(Event.ENTER_FRAME, motion); } private function uninitialize(event:Event):void { removeEventListener(Event.ADDED_TO_STAGE, initialize); removeEventListener(Event.REMOVED_FROM_STAGE, uninitialize); removeEventListener(Event.ENTER_FRAME, motion); } private function motion(event:Event):void { x += camera.x; y += camera.y; scaleX /= 1.09; scaleY /= 1.09; if (width < 1) tellRemoveToParent(); } private function tellRemoveToParent():void { var p:Main = parent as Main; p.remove(this); } }