Hi guys, I recently wrote a class to handle this kind of effects in
animation context, so applied to movieclips NOT bitmaps, but when the
masks I handle start to be bigger the performance sucks. It's obvious
but I'm just wondering if there is a better way that the one I'm using.
Here my procedure:
- draw with draw api a gradient fill in a movieclip (mask_mc),
0x00ffffff to 0xffffffff
- create a new BitmapData (mask_bd) to copy the content of the gradient mask
- draw mask_mc in mask_bd
- create a new BitmapData (image_bd) to contain the movieclip to be masked
- draw the movieclip in image_bd
- create a new BitmapData (picture_bd) to contain the final result
- copy image_bd to picture_bd using mask_bd as mask
Of course doing this operation every frame with large images sucks, is
there a way to skip some steps?
Here the actual result:
http://nuthinking.com/f8/gradient_mask.html
thanks a lot, chr
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{ Christian Giordano's site and blog @ http://cgws.nuthinking.com }
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