RE: first time with ATI

You might try a simpler shader as he suggests.  Like only use a texture2D lookup, or none at all and make sure that runs fast before using texture1D and texture3D.

Try just outputting a constant color and start adding things back in from there to see what instruction is giving you the problem. 

-----Original Message-----
Sent: Tuesday, May 23, 2006 8:14 PM
To: Multiple recipients of list OPENGL-GAMEDEV-L

No way my friend... My shaders are really basic...

//vertex
void main()
{
  float s;
  gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
  gl_Position = ftransform();
  gl_ClipVertex = gl_ModelViewMatrix * gl_Vertex; }

// fragment
uniform sampler3D my3dTex;
uniform sampler1D my1DTex;
void main (void)
{
  gl_FragColor = texture1D(my1DTex, texture3D(my3dTex, gl_TexCoord[0].xyz).r); }

I comment "gl_ClipVertex = gl_ModelViewMatrix * gl_Vertex;", which it is the only "rare" thing, but still, 1 frame per MINUTE.

I am using glew 1.3.3.0

----- Original Message -----
To: <[email protected]>
Sent: Monday, May 22, 2006 11:09 PM


> Hi Guys
>
> I am using Mobility Radeon x1600... I tested a GLSL program, which uses
>
>    1. 3D texture
>    2. Simple Shaders (2.0)
>    3. Clipping planes
>    4. Multitexturing
>
> and, it is really slow (1 frame "PER MINUTE").
>
> I am wondering, how could it be possible?... I tested the same code over 
> fx5200, and at least it gives 1 frame PER SECOND. I tried it over fx6800, 
> and it gives about 25 fps. I installed latest catalyst (SP32497.exe), and 
> even I tried with catalyst 6.4... but still, the same amazing speed.
>
> I do not undestand the reason... it is supposed x1600 is good...
> Any clue?
>
> Thanks again guys
> RIX
> 

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