how to know on which card the prog's running ?

OpenGL OpenGL: Basic Coding
1

what i mean is :
I wrote a program that uses register combiners for lighting, but i need a bool that says if i am on an nvidia card or not…

looking if GL_NV_register_combiners is supported does mean anything, right, since it’s OPENGL version checking, not hardware cheking. there must be a string to look for, somewhere, but where is that ??

thanks for your help
wizzo

2

Some 3dlabs card/drivers supports that extension as well… shouldnt they be allowed to show the demo? Just check if the extension is present, thats enough.

3

what i meant was : opengl 1.x support GL_NV_register_combiners, so if the prog is running on a machine with an ati card, with opengl 1.x installed, and that i check if the extention’s present, then i’ll find it, but it doesn’t mean i can use it, am i right ? or not ? =) please tell me

wizzo

4

you are not right…

extensions are not connected with opengl version… so if you find an extension in the extensionstring you are sure you can use it, else its a driverbug.

5

alright then, i’m gonna do that

side question :
if there are 2 extentions for doing the same thing, one specific to an nvidia card (lets say loading object in the agp memory), which one should give the best result ? the one specific to the card, or the ‘generic’ one ?

thx for your help mazy

6

use VBO

7

looks like you’re not a fan of nVidia =)

wizzo

8

VBO is the vertex buffer object extension ( not the VAO which is atis ext for the same thing) its cross-vendor, and in opengl 1.5 its even in the opengl core… so i guess all drivers will optimise this path now and in the future.

9

thanks for your good answers mazy, i know what to do now

wizzo