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主文件代碼

代碼拷貝框
import flash.display.*; import flash.filters.*; import flash.geom.*; import de.popforge.bitmap.Shape; Shape.setContainer( this.createEmptyMovieClip( 'shapes', 10000 ) ); //-- get blue circle as a bitmap var blueSpotClip: MovieClip = attachMovie( "blueSpot", "blueSpotClip", 0 ); var clipBounds: Object = blueSpotClip.getBounds(); var blueSpot: BitmapData = new BitmapData( clipBounds.xMax, clipBounds.yMax, true, 0 ); blueSpot.draw( blueSpotClip, new Matrix() ); blueSpotClip.removeMovieClip(); //-- involved bitmaps var source: BitmapData = new BitmapData( 256, 256, false, 0 ); var output: BitmapData = new BitmapData( 256, 256, false, 0 ); var buffer: BitmapData = new BitmapData( 256, 256, false, 0 ); var bounds: Rectangle = new Rectangle( 0, 0, 256, 256 ); var origin: Point = new Point(); var matrix: Matrix = new Matrix(); //-- creating a gradient with fire colors import de.popforge.bitmap.Gradient; var firePalette: Array = Gradient.fillArray ( [ 0, 0xA20000, 0xFFF122, 0xFFFFFF, 0xF8FF1B, 0xC53C05, 0 ], [ 0, 50, 50, 100, 75, 25, 0 ], [ 0, 64, 132, 186, 220, 250, 255 ] ); //-- Filter to let the flame grow var flame: ConvolutionFilter = new ConvolutionFilter( 3, 3, null, 2.7, -2 ); attachBitmap( output, 0, false, false ); var ms: Number = getTimer(); var frame: Number = 0; onMouseMove = function() { //-- create burning area var mouse: Point = new Point( _xmouse - clipBounds.xMax/2, _ymouse - clipBounds.yMax/2 ); source.copyPixels( blueSpot, new Rectangle( 0, 0, clipBounds.xMax, clipBounds.yMax ), mouse ); } onEnterFrame = function() { //-- create burning area var mouse: Point = new Point( _xmouse - clipBounds.xMax/2, _ymouse - clipBounds.yMax/2 ); source.copyPixels( blueSpot, new Rectangle( 0, 0, clipBounds.xMax, clipBounds.yMax ), mouse ); //-- the flames matrix with some randoms to expand the flame sidewards var flameMatrix: Array = [ 0, 0, 0, 0, 0.2, 0, 0, 1.6, 0 ]; flameMatrix[3] = Math.random() * .001; flameMatrix[5] = Math.random() * .001; flameMatrix[6] = .4 + Math.random() * .1; flameMatrix[8] = .4 + Math.random() * .1; flame.matrix = flameMatrix; //-- applying the filter 3 times to increase the flame speed //-- compute the affected region by "generateFilterRect", "getColorBoundsRect" var area: Rectangle = source.generateFilterRect( source.getColorBoundsRect( 0xFF, 0, false ), flame ); source.applyFilter( source, area, area.topLeft, flame ); area = source.generateFilterRect( area, flame ); source.applyFilter( source, area, area.topLeft, flame ); area = source.generateFilterRect( area, flame ); source.applyFilter( source, area, area.topLeft, flame ); //-- remap the the flame bitmap with fire colors output.paletteMap( source, area, area.topLeft, null, null, firePalette ); //-- fps if( getTimer() - 1000 > ms ) { ms = getTimer(); fps = frame; fpsDisplay.text = fps.toString(); frame = 0; } else { frame++; } } var mouseDown: Boolean = false; onMouseDown = function() { mouseDown = true; } onMouseUp = function() { onEnterFrame(); mouseDown = false; } createTextField( "fpsDisplay", 99, 0, 0, 60, 20 ); fpsDisplay.textColor = 0xffffff; fpsDisplay.selectable = false;
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對(duì)應(yīng)的AS代碼：Gradient.as

代碼拷貝框
import de.popforge.bitmap.Shape; import flash.display.BitmapData; import flash.geom.ColorTransform; import flash.geom.Matrix; class de.popforge.bitmap.Gradient { public static function createXYGradient(): BitmapData { /* * get canvas */ var g: Shape = Shape.get(); if( g == null ) { return null; } var xyGradient: BitmapData = new BitmapData( 256, 256, false, 0 ); var matrix: Matrix = new Matrix(); /* * create y as blue colorvalues */ matrix.createGradientBox( 256, 256, Math.PI/2, 0, 0 ); g.beginGradientFill( 'linear', [ 0, 0x0000ff ], [ 100, 100 ], [ 0, 0xff ], matrix ); g.moveTo( 0, 0 ); g.lineTo( 256, 0 ); g.lineTo( 256, 256 ); g.lineTo( 0, 256 ); g.lineTo( 0, 0 ); g.endFill(); matrix.identity(); xyGradient.draw( g, matrix ); g.clear(); /* * create x as green colorvalues */ matrix.createGradientBox( 256, 256, 0, 0, 0 ); g.beginGradientFill( 'linear', [ 0, 0x00ff00 ], [ 100, 100 ], [ 0, 0xff ], matrix ); g.moveTo( 0, 0 ); g.lineTo( 256, 0 ); g.lineTo( 256, 256 ); g.lineTo( 0, 256 ); g.lineTo( 0, 0 ); g.endFill(); matrix.identity(); xyGradient.draw( g, matrix, null, 'add' ); g.removeMovieClip(); return xyGradient; } public static function createDisplacementMapFromMidMap( midmap: BitmapData ): BitmapData { var displace: BitmapData = createXYGradient(); if( displace == null ) { return null; } var colorTransform: ColorTransform = new ColorTransform(); var m: Matrix = new Matrix(); colorTransform.greenMultiplier = .5; colorTransform.blueMultiplier = .5; displace.draw( displace, m, colorTransform ); colorTransform.greenOffset = 128; colorTransform.blueOffset = 128; displace.draw( midmap, m, colorTransform, 'difference' ); return displace; } /* * returns an array with 32bit colorvalues * usefull to remap a bitmap using 'paletteMap' */ public static function fillArray( colors: Array, alphas: Array, ratios: Array ): Array { var g: Shape = Shape.get(); if( g == null ) { return null; } var array: Array = new Array; var m: Matrix = new Matrix(); m.a = m.d = .15625; m.b = m.c = 0; m.tx = m.ty = 128; g.beginGradientFill( 'linear', colors, alphas, ratios, m ); g.moveTo( 0, 0 ); g.lineTo( 256, 0 ); g.lineTo( 256, 1 ); g.lineTo( 0, 1 ); g.lineTo( 0, 0 ); g.endFill(); var bmp: BitmapData = new BitmapData( 256, 1, true, 0 ); m.identity(); bmp.draw( g, m ); g.removeMovieClip(); var x: Number = 256; while( --x > -1 ) { array[x] = bmp.getPixel32( x, 0 ); } return array; } }
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shap.as

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import flash.display.BitmapData; class de.popforge.bitmap.Shape extends MovieClip { static var id: String = '__Packages.de.popforge.bitmap.Shape'; static private var container: MovieClip; static public function setContainer( container: MovieClip ): Void { Shape.container = container; Object.registerClass( id, Shape ); } static public function get(): Shape { if( container == undefined ) { trace( 'ERROR: No container is defined. Call Shape.setContainer( timeline: MovieClip );' ); return null; } var d: Number = container.getNextHighestDepth(); return Shape( container.attachMovie( id, d.toString(), d ) ); } public function rasterize( target: BitmapData ): Void { target.draw( this ); } }
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源文件下載：fire.zip

出處：相關(guān)論壇
責(zé)任編輯：moby

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