// forked from checkmate's Checkmate vol4 Massmedian package { import flash.display.*; import flash.events.*; import flash.net.*; import flash.geom.*; [SWF(backgroundColor=0x00,frameRate=60)] public class FlashTest extends Sprite { /* * [Checkmate Vol4 by MASSMEDIAN] * Please produce the illumination freely with a color palette. * * usage of Palette class * A single value is used. * var white:uint = Palette.WHITE; * var green:uint = Palette.GREEN; * var red:uint = Palette.RED; * var gold:uint = Palette.GOLD; * var silver:uint = Palette.SILVER; * var black:uint = Palette.BLACK; * All the values are used. * var colors:Array = Palette.getColors(); */ private function init( e:Event = null ):void { resize(); drawXmasTree() createSnow(); //showPaletteMap(); } public var rect:Rectangle= new Rectangle(); public var center:Point = new Point(); private const SLOW_LENGTH:int = 1000; private var _snow:Vector.<Snow> = new Vector.<Snow>(); private var _twincles:BitmapData; private var _canvas:BitmapData; private var _matrix:Matrix; private var _ctf:ColorTransform = new ColorTransform( 0.75, 0.8, 0.8, 0.95 ); private function createSnow():void { // The value used for generation is prepared. const RADIAN:Number = Math.PI*2; const COLORS:Array = Palette.getColors(); // The canvas to draw in illumination. var snow:Snow, speed:Number, angle:Number; for( var i :int = 0; i<SLOW_LENGTH; ++i ) { snow = new Snow(); snow.x = (Math.random()-0.5)*50 + center.x; snow.y = Math.random()*rect.height; snow.vx = (Math.random()-0.5) * 4; snow.vy = Math.random()*-2; snow.color = COLORS[int(COLORS.length*Math.random())]; _snow.push( snow ); } // The canvas to draw in illumination. _canvas = new BitmapData( rect.height, rect.height, true, 0 ); var cbm :Bitmap = addChild( new Bitmap( _canvas ) ) as Bitmap; cbm.smoothing = true; // The canvas to draw in twincles. _twincles = new BitmapData( rect.width/4>>0, rect.height/4>>0, true, 0 ); var tbm:Bitmap = addChild( new Bitmap( _twincles ) ) as Bitmap; tbm.scaleX = tbm.scaleY = 4; tbm.smoothing = true; tbm.blendMode = BlendMode.ADD; // Matrix to draw by size of 1/4 _matrix = new Matrix(0.25, 0, 0, 0.25); addEventListener( Event.ENTER_FRAME, updateSnow ); } private function updateSnow(e:Event):void { _canvas.lock(); for each( var snow:Snow in _snow ) { // The Brownian motion is added. snow.vx += (Math.random()-0.5)*0.04; snow.vy += (Math.random()-0.5)*0.04; // Gravity is added. snow.vy += 0.015; // The wind drag is added. snow.vx *= 0.987; snow.vy *= 0.987; // The speed is added to the position. snow.x += snow.vx; snow.y += snow.vy; // draw to canvas in position. _canvas.setPixel32( snow.x, snow.y, snow.color | 0xFF<<24 ); // It resets it when going out of the area. if( snow.x < rect.x -50 || snow.y < rect.y -50 || snow.x > rect.width +50 || snow.y > rect.height + 50 ) { snow.x = center.y + (Math.random() -0.5) * 10; snow.y = Math.random() *-30; snow.vx = (Math.random() -0.5) * 3; snow.vy = Math.random() *-3; } } // ColorTransform(effect that dose blackout) is made to adjust. _canvas.colorTransform( _canvas.rect, _ctf ); _canvas.unlock(); // draw to canvas in twincles by using Matrix. _twincles.draw( _canvas, _matrix ); } private function resize( e:Event = null ):void { rect.width = stage.stageWidth; rect.height= stage.stageHeight; center.x = rect.width /2>>0; center.y = rect.height /2>>0; } private function drawXmasTree():void { var loader :Loader = new Loader(); addChild( loader ); loader.load( new URLRequest("http://swf-dev.wonderfl.net/static/assets/checkmate04/tree.jpg") ); } private function showPaletteMap():void { var colors:Array = Palette.getColors(); var palette:Sprite = addChild( new ColorMap( colors ) ) as Sprite; palette.x = ( rect.width - palette.width ) /2 >>0; palette.y = ( rect.height- palette.height ) /2 >>0; } public function FlashTest() { if( stage ) init(); else addEventListener( Event.ADDED_TO_STAGE, init ); } } } /* for Checkmate */ class Palette { public static const WHITE:uint = 0xF0F0F0; public static const GREEN:uint = 0x008800; public static const RED:uint = 0xCC0000; public static const GOLD:uint = 0xFFCC66; public static const SILVER:uint = 0xCCCCCC; public static const BLACK:uint = 0x101010; public static const COLORS:Array = [ WHITE, GREEN, RED, GOLD, SILVER, BLACK ]; public static function getColors():Array { return COLORS.slice(); } } /* for Example. */ class Snow { public var x:Number = 0; public var y:Number = 0; public var vx:Number = 0; public var vy:Number = 0; public var color:uint = 0x00; } /* for debug. */ import flash.display.*; class ColorMap extends Sprite { public function ColorMap(colors:Array) { var l:int = colors.length; var rect:Sprite; for( var i:int=0; i<l; ++i ) { addChild( rect = new ColorRect( colors[ i ] ) ); rect.x =i * ColorRect.WIDTH; rect.y =0; } } } /* for debug. */ class ColorRect extends Sprite { public static const WIDTH:int = 40; public static const HEIGHT:int = 40; public function ColorRect( color:uint ) { super(); graphics.beginFill( color, 1 ); graphics.drawRect( 0, 0, WIDTH, HEIGHT ); graphics.endFill(); } }