Re: preserve regpoint with imported png at runtime

Wed, 16 Jun 2004 12:00:56 -0700 

with code like the following you can restrict the sensitive area to the
non-transparent part of the image:
on mouseUp me
  s=sprite(me.spriteNum)
  m=s.member
  col=m.image.extractAlpha().getPixel(the mouseloc-point(s.left,s.top))

  if col=0 then return -- or use ilk(col)<>#color
  if col.paletteIndex=0 then return

  alert("MOUSEUP")
end


You can also set the alpha threshold.

-Kurt

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