[osg-users] ATI GLSL bug regarding uniform arrays?

[Mike Weiblen]

Hi,

Agreed this is not for OSG to workaround.
But rather than do without arrays, couldn't your app conditionally
append the "[0]"?
Not clear why this is a showstopper.  Just curious.

-- mew


> -----Original Message-----
> From: osg-users-bounces at lists.openscenegraph.org [mailto:osg-users-
> bounces at lists.openscenegraph.org] On Behalf Of Christian Muschick
> Sent: Tuesday, January 29, 2008 4:38 AM
> To: osg-users at lists.openscenegraph.org
> Subject: [osg-users] ATI GLSL bug regarding uniform arrays?
> 
> 
> Hello!
> 
> There seems to be a bug in ATI OpenGl drivers when using uniform
> arrays.
> For e.g. the uniform array "float arr[3]" I have found that
> getUniformLocation("arr") returns an error while
> getUniformLocation("arr[0]") returns the desired value.
> 
> This is in clear contrast to the glGetUniformLocation documentation,
> where it says:
> "... Except if the last part of name indicates a uniform variable
> array,
> the location of the first element of an array can be retrieved by
using
> the name of the array, or by using the name appended by "[0]"."
> 
> Has anybody else experienced this issue? I expect no workaround will
be
> implemented in OSG, so I'll have to do without array uniforms?
> 
> If nothing else, this should warn anybody searching for ATI and array
> uniforms...
> 
> regards
> cm
> _______________________________________________
> osg-users mailing list
> osg-users at lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-
> openscenegraph.org