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. > > > -- > Matteo Sisti Sette > matteosistise...@gmail.com > http://www.matteosistisette.com > > _______________________________________________ > GEM-dev mailing list > gem-...@iem.at > http://lists.puredata.info/listinfo/gem-dev
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