have anyone come across this problem when
wglGetProcAddress(“glSampleCourageARB”) return NULL value.
***note:
i did uses wglGetProcAddress(“wglGetExtensionString”) and the value returns do include “WGL_ARB_multisampling”)
So what’s wrong???
The hardware i’m using is Elsa Syn II 
LOL check out your spelling:
glSampleCoverageARB
-Lev
ROFL!! sorry couldnt resist that. OpenGL doesnt like it when i try to give it more courage too. 
j/k!
-SirKnight
[This message has been edited by SirKnight (edited 03-11-2002).]
Yes, sorry of that mistake.
But i did spell as glSampleCoverageARB
in my program.
Have you been able to load any other extensions? I say that because maybe your extension loading code is wack. On the main opengl.org page a few days ago there was a news post about some functions this guy made that will load all extensions your card supports with one function call. Maybe you can try that and see what happens.
-SirKnight
I think i have gone through that discussion. However i tried loading other extensions and it just work well. And When i downloaded a software fron nVidia, the software is not able to detect multisampling too.
i start to wonder is it due to the driver or the hardware???
Any comment?? Thank you
I’d guess it’s the driver. Try opening the driver file in a hex editor and see if you find a “glSampleCoverageARB” string in there at all. That’s at least what I would do
Thank, but what’s a hex editor?
Originally posted by p9931734:
Thank, but what’s a hex editor?
Would you be able to do some research on your own before asking questions like this?
Sorry. I’m just shock at the moment i read about it. I’m sure to do it the next time
Did you use the WGL_ARB_pixel_format functions to request a pixel format supporting FSAA prior to attempting to fill the glSampleCoverage function pointer?
Not sure if the driver is allowed to report WGL_ARB_multisampling without having a current pixelformat that it can be enabled on, BUT I thought it would be a good question to ask.
Have fun,
– Jeff
For me the function pointer get´s filled, even if I don´t have got a Pixelformat active, that supports AA.
Diapolo
i did. glSampleCoverageARB are called after the pixel formatting.
Anyway i tried to use a hex editor and realize that there isn’t a glSampleCoverageARB function within the driver.(I did manage to find other extensions)
So what’s the problem??? since the return string of wglGetExtensionString did return "WGL_ARB_multisampling "
I suppose you should try to update your drivers.