GLSL not working under OSX

deets · Post by **deets** » Wed Feb 25, 2009 12:39 pm

Hi,

I tried the GLSL-example with high- and low-level shaders. The latter runs, but the former simply produces white fragments.

There are no errors during setup.

My System is a MacPro, OSX 10.5.6 with two NVIDIA GeForce 8800 GT.

Anybody got any idea why it's not working, and if not how I maybe can compile the GLSL-code to the .psh/.vsh-files that do work?

deets

abhishekdey1985 · Post by **abhishekdey1985** » Wed Feb 25, 2009 12:41 pm

hav u properly installed ur NVIDIA drivers.

bitplane · Post by **bitplane** » Wed Feb 25, 2009 2:12 pm

I thought this was because my Mac didn't support GLSL, but it seems it should. Looks like the texture isn't being passed to the fragment shader, if we ignore the texture in the shader and give it a constant value instead then the output changes.
So it looks like this is an Irrlicht bug in OSX.

deets · Post by **deets** » Wed Feb 25, 2009 5:40 pm

Interesting. I will have a look to see if I can spot the problem. However, I wonder how setting up those shader parameters differs between high and lowlevel - they should be the same...

thanks for the hint, hopefully I can solve that.

bitplane · Post by **bitplane** » Wed Feb 25, 2009 7:27 pm

They're set in the same way using glBindTexture, but I also tried setting the texture by name and it fails in a different way, the material isn't rendered at all.
I'll mess around with this some more when I have time, but I've added it to the tracker for the moment. If you manage to fix this or otherwise make progress please post a comment or fix to that tracker item and I'll get an email.

hybrid · Post by **hybrid** » Thu Feb 26, 2009 8:13 am

Maybe some of the extensions are not supported by native commands under OSX, though this would create log messages. Since the material isn't rendered at all it could also be some mipmap problem, which often leads to missing textures.
Maybe someone wants to join the gDebugger beta program for OSX - check opengl.org

hybrid · Post by **hybrid** » Sun Jan 10, 2010 11:48 pm

Hmm, just checked the example under OSX, and it works for me as expected. I guess it has somehow been solved.