Image Flood Fill (Using getPixel and setPixel)

 

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This behavior uses the undocumented setPixel and getPixel functions to flood fill an image.

--------- flood fill color in bitmap to random color --------- Jakob Hede Madsen --------- hede@image.dk --------- special thanks: Roy Pardi property pPctRef property pSprLeft property pSprTop property pSprScalarX property pSprScalarY property pPixelActorListX property pPixelActorListY property pSpreadListX property pSpreadListY --------------- on beginSprite me   mySpr = sprite me.spriteNum   pPctRef = mySpr.member   pSprLeft = mySpr.left   pSprTop = mySpr.top   pSprScalarX = float(pPctRef.width) / mySpr.width   pSprScalarY = float(pPctRef.height) / mySpr.height   pPixelActorListX = []   pPixelActorListY = []   pSpreadListX = [1, 0, -1, 0]   pSpreadListY = [0, 1, 0, -1] end --------------- on mouseDown me   fillColor = random(16777216)   sprX = the mouseH - pSprLeft   sprY = the mouseV - pSprTop   mbrX = integer(sprX * pSprScalarX) - 1   mbrY = integer(sprY * pSprScalarY) - 1   ----   --  a = the ticks   me.mFlood(mbrX, mbrY, fillColor)   --  put the ticks - a end --------------- on mFlood me, aX, aY, aSourceColor   targetColor = pPctRef.getPixel(aX, aY)   pPctRef.setPixel(aX, aY, aSourceColor)   append pPixelActorListX, aX   append pPixelActorListY, aY   repeat while count(pPixelActorListX)     xCur = getAt(pPixelActorListX, 1)     yCur = getAt(pPixelActorListY, 1)     deleteAt pPixelActorListX, 1     deleteAt pPixelActorListY, 1     repeat with n = 1 to 4       xTest = xCur + getAt(pSpreadListX, n)       yTest = yCur + getAt(pSpreadListY, n)       if pPctRef.getPixel(xTest, yTest) = targetColor then         pPctRef.setPixel(xTest, yTest, aSourceColor)         -- updateStage         append pPixelActorListX, xTest         append pPixelActorListY, yTest       end if     end repeat   end repeat end