Forums > Jitter

multiple independant erase_color

Mar 21 2006 | 2:00 pm


I have a patch with mutiplte 3D objects movin in space,
and I’d like them to leave more or less a trace behind
them, as if they had different erase_color values.

All rendering in one window.

I found examples in the forum explaining how to make
multiple rendering of a scene, but this does not seem to do the trick.
I guess I would need as many render as different erase_color,
since erase_color in done during the rastering phase which is
performed only once in the render, if my little OpenGL knowledge is correct.

Does anybody know how to achieve this?


Mar 21 2006 | 5:31 pm


I suggest you try rendering your objects to separate gl textures, and then
do mixing/feedback effects using slabs/shaders.

for rendering to texture, checkout capture attribute to gl.objects,
to_texture of and search all recent threads about rendering to
texture, good stuff in there!


Mar 21 2006 | 5:53 pm

mmm… yes, thats the solution I was thinking of.
I was reluctant to create 1 render per new 3D object,
because this number changes dynamically, but I do
not see any other way of doin it in the GPU.

Thanks Nesa for the indication though..


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