Comments on: Instance culling using geometry shaders

By: Cat

Cat — Fri, 09 Jul 2010 07:09:01 +0000

~400 FPS on a GTX 470

By: Pepa

Pepa — Mon, 05 Jul 2010 18:46:24 +0000

Maybe I try tommorow change shader loader function.

By: Daniel Rákos

Daniel Rákos — Mon, 05 Jul 2010 18:18:09 +0000

So the EXE delivered is working for you, just you cannot recompile the project properly.
Well, maybe the problem is with SFML as you have to use the latest development branch in order to take advantage of OpenGL 3 context support. Maybe I’m wrong, but that can be an issue.
Btw I compiled everything with GCC.

By: Pepa

Pepa — Mon, 05 Jul 2010 18:07:07 +0000

Maybe I’ll send you an projet. Maybe I set something wrong in the project or my system is wrong? I use visual studio 2008 EE sp1

By: Daniel Rákos

Daniel Rákos — Mon, 05 Jul 2010 17:34:39 +0000

Then maybe you should use the latest NVIDIA drivers as most probably only those have good support for OpenGL 3.2+.
Btw I use the latest version of glew that is (I think) 1.5.4.

By: Pepa

Pepa — Mon, 05 Jul 2010 17:25:18 +0000

I use old driver and problem exist. Question – you using glew 1.5.4 or other version?

By: Daniel Rákos

Daniel Rákos — Mon, 05 Jul 2010 17:16:15 +0000

Hmm, can anybody confirm this problem? I didn’t met it on ATI drivers. If you really use the latest available NVIDIA driver then maybe it is a driver bug. However, I cannot confirm that either.

By: Pepa

Pepa — Mon, 05 Jul 2010 17:04:56 +0000

Hello. I try use this code but error in I run – console startup loading shader and crash application. Demo works fine. Windows 7 , geforce GTS 250 , new nvidia driver, glm 0.9.0.1, glew 1.5.4, sfml 2.0 – compile fine in debug or release but run error in loader shader. Of course exe and shader exist – this line error glShaderSource(shader, 1, (const GLchar**)&source, NULL);

By: Daniel Rákos

Daniel Rákos — Sat, 19 Jun 2010 16:17:26 +0000

Thanks for sharing this information!
I was wondering why the demo didn’t work after I upgraded my drivers.
I will update the demo.

By: pierre boudier

pierre boudier — Fri, 18 Jun 2010 08:18:59 +0000

hi,

we have looked at your demo and found out that you were calling glBindAttribLocations after glLinkPorgram; according to the GL specification, this should have no effect on the rendering.
unfortunately, some prior AMD driver were not implementing this correctly, but it has been fixed recently with cat 10.5, so you should update your demo.

looking at other IHV, it seems that apple correctly implement this part of the GL specification as well.

regards,

Pierre B.
AMD