Hi all,
First, a simple question : what is the more efficient between copying data from framebuffer to texture and from texture to texture ?
An other question :
I render a set of triangles. When one overlap another one, i must do some computation iteratively, like blending, but i can’t use it. So i do that in a fragment program. i render triangle per triangle. For each one i update a texture containing all my informations. This texture is used as an input in my fragment program, so i can’t write in it, so i write my new informations in the framebuffer. And after i need to copy the updated part of the framebuffer to my texture. This is very slow. So i’m searching for an other solution to do my computations.
here is what i do :
set the input texture of the fragment program
for each triangle {
render the triangle to the framebuffer (using the fragment program)
copy updated part of the framebuffer to the texture
}
Is there a well known solution to do that faster ?
(sorry for my bad english)
thx
