Flash超真实火焰效果

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  主文件代码

  代码拷贝框
  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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