Visibility against an unknown background
fredrik at pythonware.com
Tue Oct 24 22:26:03 CEST 2006
Sergei Organov wrote:
> > and doesn't work at all on medium gray or b/w dithered patterns.
> Yes, every method has its pros and cons, but XOR is probably most
back in the days when backing store was expensive, and memory bandwidth
was limited, maybe. contemporary graphics hardware is something radi-
> Where "most cases" depends on application. I'd be very upset to see,
> say, 5-6 highly intersecting scientific plots on the same picture drawn
> using the "marching ants" approach.
but the mostly random colors you get from XOR wouldn't upset your color
to solve your specific case, I'd use bitmask algebra to generate alpha
layers (or masks/stencil buffers), and use standard compositing to
generate the final result.
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