[PD] [GEM-dev] Blending mode directly on objects, not pixes?

Jack jack at rybn.org
Sat Nov 28 18:42:10 CET 2009


Is it what you are looking for ?
++

Jack



Le samedi 28 novembre 2009 à 17:53 +0100, Matteo Sisti Sette a écrit :
> 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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