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Masoud

OpenGL OpenGL+Debug+Voodoo3+win2k problems

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hello folks i have some problems with programming opengl. First of all, i use win2000 prof. + voodoo3 3000. I installed the latest 3dfx drivers (release 1.0). While everything (games, etc.) runs well in release-mode, i get lot of problems in debugmode. By calling wglDeleteContext(...) at cleanup i get a a "user break ...." in the nt-kernel dll. I tried many different opengl-mini-apps. I wonder if its a bug in 3dfx driver, in win2k or whatever. Anyone has the same problem ? Regards Masoud

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I''m using voodoo3 3000 and I found some problems in windowed mode in one of the latest driver release...(so I don''t change it).
You shoud use IDC version of the driver (Installable Client Driver) not a minigl driver.
However I have no (Win/OpenGL) problem when I''m exiting from the application...(are you making a clean up at exit?)

When your application finished (or you''re going to change display mode)
...
wglMakeCurrent( NULL, NULL );
wglDeleteContext( hRC ); // delete render context
ReleaseDC( hWnd, hDC ); // release device context
...

Remember to GetDC when you init OpenGL and not every time you call SwapBuffers(hDC).

I''ve also noticed some strange bugs:

1) If you don''t draw a lot of thing (for example clear and swap) the application crashes when you try to resize it (swap per second >300)!

2) If you draw lines and they are clipped against the viewport, clipped colors are wrong...if you enable GL_WIDTH and you set glLineWidth(1.000001f) lines will be 1.0 width but the colors are correct!

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Are You also on Win2k ?
You mentioned ICD drivers, all i did was to install the
win2k drivers from 3dfx web, do i need to install any
additional "packages" ? (ICD ?).
I cleaned my app the standard-way, which is (almost) the same
as You wrote:

wglMakeCurrent( hDC, NULL );
wglDeleteContext( hRC ); // delete render context
ReleaseDC( hWnd, hDC ); // release device context

An i mentioned, i even tried many different 3rd party opengl-
mini apps, they all behaved the same, "crash" (user-breakpoint)
at wglDeleteContext(...).
Btw, NeHe''s OpenGL miniapp crahsed totally on my computer.

Regards,

Masoud

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