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McZ
12-08-2000, 01:55 AM
I want to use my 3DFX Voodoo2 instead of my ATI Rage PRO 3D AGP card becouse the 3DFX is faster (tested in Quake 3) but I donīt know how I should do to use it ! I have made a textured cube who is mirrored in a flat red floor using a pixelbuffer, but it is verry slow when I start it, I donīt know why becouse it is only 12 polys in the cube and 2 in the floor and the computer should be able to render this at a good speed with software. there is no lighnig at all and I use DisplayList to draw the cube and flor one for the cube and one for the floor.

martin_marinov
12-08-2000, 02:43 AM
see if your color mode is 16 bpp. As u may know, 3dfx accelerated pixel formats are only supported in 16bpp - see DescribePixelFormat() to see if the choosen pixel format is accelerated. Otherwise your ogl calls will be handled by the Win32 generic implementation - maybe this is the reason for the slow performance... http://www.opengl.org/discussion_boards/ubb/smile.gif

outlander78
12-08-2000, 09:50 AM
ATI accelertion, on the other hand, only happens in 16 and 32 bit mode. 8 and 24 are software only. (doh!) If you run a Quake game with 8-bit texturing on, it'll run faster on anything but a ATI card. http://www.opengl.org/discussion_boards/ubb/frown.gif I don't know if this applies to your Quake III test (does it allow 8-bit colour?), but I know it does to Quake I and II.

McZ
12-11-2000, 12:16 AM
I run my openGL application in 16bit color mode and in Q3A I also use 16bit color mode but my cube is still slow.. I have watch some demos from demopartys, they use opengl and they are fast, even when I use my ATI card!

AndersO
12-11-2000, 02:16 AM
You also need to link to 3dfx's own standalone opengl dll.

Read this: http://www.opengl.org/developers/code/features/drivertypes.html

and this: http://members.home.com/borealis/opengl_usingq3.html