Stefano wrote:
> 2007/5/7, Marcus Lindblom <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>:
>
> Hm. Maybe filtering doesn't work for depth data? (It can happen, depth
> is a bit tricky to texture with) Try to test if you get at least
> bilinear filtering.
>
>
> Don't know if I'm saying something stupid, but I'm pretty sure that
> mipmapping works as it should.. using the following fragment shader I
> can see my depth buffer "blurred" as it should be if mipmaps worked:
Mipmapping works. What might not work is filtering between mipmap
levels. There is a difference. (i.e you're getting
nearest_mipmap_nearest even if you are saying linear_mipmap_linear)
> void main(void) {
> vec4 dd = texture2D(depth, gl_TexCoord[0].xy, 4.0); // <<-- bias=4.0!
> gl_FragColor = dd;
> }
Test some values to see if you are getting discrete steps, or simply set
nearest_mipmap_nearest and see if it yields equivalent results.
> I guess my problem lies where I grab the depth texture. It seems I take
> a texture format with too little bits... It's setted correctly, isn't it?
If your texture is depth_component_24 it ought to work just fine.
What card are you using btw? (Don't know if you've said that before) I
_know_ some cards don't filter depth component textures at all. (The
GF7800 doesn't, for instance.)
Cheers,
/Marcus
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