actually, I did a quick test now, and it does not work. it seems gemframebuffer and glsl program don't play together. a chain like

[gemhead] | [gemframebuffer] | [glsl stuff] | [some texture] | [square]

does not produce any texture in gemframebuffer (only black or whatever bg color you use).

:(

marius.

vade wrote:

I agree, this should be possible in theory. I suspect one should be able to build an abstraction that would dynamically load a shader program, render to a quad, send that quad to a texture and output the texture.

This is basically all jit.gl.slab does for stream processing.

I still have heard nothing on the multitexture issue for GLSL however, so there may be some gotchas.

On Nov 25, 2007, at 3:40 PM, marius schebella wrote:

...

Hi alexandre, why do you think it is not possible? or what exacactly do you want to do? If you try to have several glsl programs like a filter bank, first do glsl-blur, then glsl-bloom, then glsl-apply-texture-to-model... then I think this only works with gemframebuffer plus playing around with "texunit 0", "texunit 1", and so on... and maybe also the right in/outlets of texture to reference gpu textures. unfortunately GEM on os x 10.5 is still broken, so I can only do very rudimentary stuff (no developing), but before that I was trying to do exactly this and I think it should be possible to do. marius.

Alexandre Quessy wrote:

...

Hi, It seems like we cannot use two GLSL shader programs at a time. Hence, I need to merge both fragment and vertex programs to use them together.... Is there a way to use more than 2 shaders ? In Jitter, there is jit.gl.slab that allows that. http://www.cycling74.com/documentation/jit.gl.slab

If not possible in Gem, that would be an awesome add-on to it.

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