Re: User Clipping Planes

I used GLSL under Fx5200 and 6800 and gl_ClipVertex works...


void main()
{
  vec4 clipVertex = gl_ModelViewMatrix * gl_Vertex;
  gl_Position = ftransform();
  for (int i = 0; i < 6; i++)
    gl_ClipCoord[i] = dot(clipVertex, gl_ClipPlane[i]);
}

Download latest drivers, latest glExt.h or latest glew.
I hope it works 2u
All d best!.
RIX


----- Original Message ----- 
To: "Multiple recipients of list OPENGL-GAMEDEV-L" 
<[email protected]>
Sent: Tuesday, May 31, 2005 9:03 AM


> Hello,
>
> (in some way further discussion to CG Using Clipping Planes thread ...)
>
> okay we learned that if we activate programmable vertex shaders our user
> clipping does not do anymore:
> there is only a gl_Position = ftransform ()
> and no gl_ClipVertex = ftransformClip () or so ... (see spec)
>
> (by the way on a ati card i got user clipping planes working with a
> programmable vertex shader and the gl_ClipVertex set correctly?! but thats
> another thing ...)
>
> ------------------------------------------------------------------------
>
> now i only activate the programmable pixel shader and leave the vertex
> fixed pipeline as is.
>
> then the fx5x series does no user clipping but fx6x does.
> there are also some ati cards that do user clipping and some who do not.
>
> does anyone have similar experiences? how can this be?
>
> Thanks,
> Andreas
>
>
>
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