Btw I am specially interested in add and multiply, and maybe difference
and subtraction
Max escribió:
make the rectangle transparent with the alpha channel
[alpha]
&
[colorRGB] <- use last inlet to control the alpha 0...1
Am 28.11.2009 um 17:53 schrieb Matteo Sisti Sette:
Hi,
Now, I don't know if this is possible at all.
Suppose I have a [rectangle] (or whatever primitive indeed) with a texture, and
something behind the rectangle.
Is it possible to have the rectangle "blend" with the background with some
blending mode (such as add, multiply, etc)?
(without having to render all the rest of the scene except the rectangle into a
texture via gemframebuffer, and then blending the two textures with pix_add and
friends)???
Isn't it a matter of shaders? I guess it could be achieved using openGL functions... but
is there a "simple" way?
Thanks
m.
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Matteo Sisti Sette
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http://www.matteosistisette.com
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