Hello everybody,
I've been racking my brain tonight trying to figure out a way to create a
reverse mask in Actionscript. I'm working on an application which is
entirely object-based; nothing on the stage other than object initialization
on the first frame. So everything needs to be programmatic.
Normally a mask displays what's on the underlying layer. I'm trying to
create a mask that would display an intermediate layer for the areas outside
of the mask shape, and basically be "invisible" for the areas of the mask
shape showing all underlying layers, whtever is displayed at that spot from
below.
An illustration (as viewed from the side :) may help...
[----------] <- mask layer containing a shape, say a box in the middle
[--- ---] <- an intermediate layer whose contents would be shown in
the areas *outside* of the above box-shaped mask
[---- ] <- various content layers
[----- -- -] <- whose visible content would
[--- - --] <- show through the mask
[----------] <- on the top
I found a short comment by someone ("Xeef") on Actionscript.org regarding
"reverse mask" as follows:
"" you will need to use more masks
"" BackGround --Box on it -- An other Background Masked by an EMPTY mask
"" (will by invisible) now draw on the Mask the part of the 2. Backgound
"" will by revaled and over lap the Box
I haven't figured out yet what that means.
Any suggestions, ideas, thoughts?
Thanks!
Ville
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