// forked from checkmate's Creek challenge package { import flash.display.MovieClip; import flash.events.Event; import flash.display.Bitmap; import flash.display.BitmapData; import flash.geom.Matrix; import flash.geom.Point; import flash.display.BlendMode; import flash.display.PixelSnapping; import flash.geom.Rectangle; import flash.geom.ColorTransform; import flash.filters.BlurFilter; [SWF(width = "465", height = "465", backgroundColor = "0x000000", frameRate = "30")] public class BeneathSpark extends MovieClip { private var _canvas:BitmapData; private var bmp:Bitmap; private var _particles:Array; private var _glow:BitmapData; private var _rect:Rectangle; private var cTra:ColorTransform; private var FocalLength:Number = 200; private var bullets:Array = []; private const bulletAmount:uint = 20; private var particles:Array = []; private const STAGE_WIDTH = stage.stageWidth; private const STAGE_HEIGHT = stage.stageHeight; private const STAGE_CENTER_X = stage.stageWidth / 2; private const STAGE_CENTER_Y = stage.stageHeight / 2; public function BeneathSpark() { init() } private function init():void { _particles = []; _canvas = new BitmapData (STAGE_WIDTH, STAGE_HEIGHT, true, 0xFFFFFF); bmp = new Bitmap (_canvas); addChild (bmp); _glow = new BitmapData( STAGE_WIDTH/4, STAGE_HEIGHT/4, false, 0x0); var bm:Bitmap = addChild(new Bitmap(_glow, PixelSnapping.NEVER, true)) as Bitmap; bm.scaleX = bm.scaleY = 4; bm.blendMode = BlendMode.ADD; _rect = new Rectangle(0, 0, STAGE_WIDTH, STAGE_HEIGHT); cTra = new ColorTransform( 0.95, 0.95, 0.95, 1.2 ); for ( var i = 0; i < bulletAmount; i++ ) { var p:bullet = new bullet(); bullets.push( p ); purposePoint( p ); p.PositionY -= 280; } addEventListener(Event.ENTER_FRAME, onEventHandler); } private function createParticle( sx:Number, sy:Number, sz:Number ):void { var i:int = 120; while (i--) { var p:Particle = new Particle(); p.PositionX = sx; p.PositionY = sy; p.PositionZ = sz; var radius:Number = Math.sqrt(Math.random()) * 1.3; var angle:Number = Math.random() * Math.PI * 2; var angle2:Number = Math.random() * Math.PI * 2; p.vx = Math.cos( angle ) * radius; p.vy = Math.sin( angle2 ) * radius; p.vz = Math.sin( angle ) * radius; _particles.push(p); } } private function purposePoint( t ) { t.PurposeX = Math.random() * 120 -60; t.PurposeY = Math.random() * 40 -160 t.PurposeZ = Math.random() * 120 -60; var rnd:Number = ( Math.random() * 2 + 2 ) / 400; t.vx = ( t.PurposeX - t.PositionX ) * rnd; t.vy = ( t.PurposeY - t.PositionY ) * rnd; t.vz = ( t.PurposeZ - t.PositionZ ) * rnd; } private function WtoS( t ):void { if ( t.PositionY > -FocalLength ) { t.scale = FocalLength / (FocalLength + t.PositionY); t.px = STAGE_CENTER_X + t.PositionX * t.scale; t.py = STAGE_CENTER_Y + t.PositionZ * t.scale; t.visible = true; } else { t.visible = false; } } private var cRot:Number = 0; private function onEventHandler(eventObject:Event):void { var variation:Number = 0.04; var ctx = mouseX / 465; var cty = mouseY / 465; if ( ctx > 0.95 ) { ctx = 0.95; } else if ( ctx < 0.05 ) { ctx = 0.05; } if ( cty > 0.95 ) { cty = 0.95; } else if ( cty < 0.05 ) { cty = 0.05; } if ( ctx > cTra.redMultiplier ) { cTra.redMultiplier += variation; } else { cTra.redMultiplier -= variation; } if ( cty > cTra.greenMultiplier ) { cTra.greenMultiplier += variation; } else { cTra.greenMultiplier -= variation; } cTra.blueMultiplier = ( Math.sin(cRot) + 1 ) / 2 * 0.95; cRot += 0.01; var i:uint = bullets.length; while (i--) { if ( bullets[ i ].PositionY < bullets[ i ].PurposeY ) { createParticle( bullets[ i ].PurposeX, bullets[ i ].PurposeY, bullets[ i ].PurposeZ ); bullets[ i ].launchPoint(); purposePoint( bullets[ i ] ); } else { bullets[ i ].PositionX += bullets[ i ].vx; bullets[ i ].PositionY += bullets[ i ].vy; bullets[ i ].PositionZ += bullets[ i ].vz; } } _canvas.lock(); _canvas.applyFilter( _canvas, _rect, new Point(), new BlurFilter( 2.4, 2.4 ) ); _canvas.colorTransform(_rect, cTra); i = _particles.length; while (i--) { var p:Particle = _particles[i]; p.vy -= 0.06; p.vx *= 0.9; p.vy *= 0.9; p.vz *= 0.9; p.PositionX += p.vx; p.PositionY += p.vy; p.PositionZ += p.vz; WtoS( p ); p.x = p.px; p.y = p.py; _canvas.setPixel32(p.x, p.y, p.c); if ( (p.x > stage.stageWidth || p.x < 0) || (p.y < 0 || p.y > stage.stageHeight) || Math.abs(p.vy) < -1.0 ) { this._particles.splice(i, 1); } } _canvas.unlock(); _glow.draw(_canvas, new Matrix(0.25, 0, 0, 0.25)); } } } import flash.display.Sprite; class bullet extends Sprite { public var scale:Number; public var PositionX:Number; public var PositionY:Number; public var PositionZ:Number; public var PurposeX:Number; public var PurposeY:Number; public var PurposeZ:Number; public var px:Number; public var py:Number; public var pz:Number; public var vx:Number; public var vy:Number; public var vz:Number; public function bullet() { launchPoint(); } public function launchPoint():void { PositionX = 0; PositionY = 250 PositionZ = 200; } } class Particle { public var x:Number; public var y:Number; public var visible:Boolean; public var scale:Number; public var PositionX:Number; public var PositionY:Number; public var PositionZ:Number; public var px:Number; public var py:Number; public var pz:Number; public var vx:Number; public var vy:Number; public var vz:Number; public var c:uint; public function Particle() { this.x = 0; this.y = 0; this.vx = 0; this.vy = 0; this.vz = 0; this.c = 0xffffffff; } }