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Thread: Problem with GL Extensions

  1. #1
    Guest

    Problem with GL Extensions

    I am having a problem with openGL games on my brand new system. With games running on the Quake 3 Arena engine (Castle Wolf. and Jedi Knight 2: Jedi Outcast), there are strange graphical glitches. When images are moving across the screen, mostly when I am using the mouse to look around, the graphics get broken up into horizontal sections that move at slightly different intervals. It isn't slowdown because it happens at all screen resolutions. It is very hard to explain but I hope I am making sense. It is a relatively subtle problem but I don't think it should be happening. I found that by turning off GL Extensions, the problem went away, but the performance of the game really suffers. There has to be a better way to fix the problem. On a related note, what are GL Extensions?

    My system is a Dell Dimension 4400 with a Visiontek Geforce4 Ti 4600. And I have the lastest Nvidia drivers installed.

    Any help would be greatly appreciated.

  2. #2
    Member Regular Contributor
    Join Date
    Apr 2001
    Location
    Fort Collins, Colorado
    Posts
    446

    Re: Problem with GL Extensions

    OpenGL extensions are basically "enhancements" or extra features that can be enabled if your video card supports it.

    Are you SURE you have the latest Nvidia drivers? Because I'm sure Dell will take their sweet time offering upgrades, you should make sure you get the drivers from http://www.nvidia.com

    I can't think of anything else that would be causing problems... does it only happen during online play, or all the time?

  3. #3
    Guest

    Re: Problem with GL Extensions

    It does happen all of the time and I did get the drivers from Nvidia's website. It is not a serious glitch, but it is pretty annoying. Thanks for the quick reply though. I think I am going to try and put a different video card in to see if is the video card itself causing the problem. I might not be explaining the glitch very well either. Oh well.

  4. #4
    Super Moderator OpenGL Guru
    Join Date
    Feb 2000
    Location
    Montreal, Canada
    Posts
    4,256

    Re: Problem with GL Extensions

    Maybe you are talking about tearing? You need to enable v-sync from the control panel for your video card and maybe you can do it in the game itself. Are you running full screen or not? Running in window seems to turn off v-sync.

    V-man
    ------------------------------
    Sig: http://glhlib.sourceforge.net
    an open source GLU replacement library. Much more modern than GLU.
    float matrix[16], inverse_matrix[16];
    glhLoadIdentityf2(matrix);
    glhTranslatef2(matrix, 0.0, 0.0, 5.0);
    glhRotateAboutXf2(matrix, angleInRadians);
    glhScalef2(matrix, 1.0, 1.0, -1.0);
    glhQuickInvertMatrixf2(matrix, inverse_matrix);
    glUniformMatrix4fv(uniformLocation1, 1, FALSE, matrix);
    glUniformMatrix4fv(uniformLocation2, 1, FALSE, inverse_matrix);

  5. #5
    Junior Member Newbie
    Join Date
    Apr 2002
    Posts
    13

    Re: Problem with GL Extensions

    Hi, I have just the same problem ! I have 3 PC home (1,4 GHZ P4 MB abit) - 1 ghz AMD MB Abit - AMD XP 1600+...I have tried a lot of videocards: Gainward GF2 mx200 - Abit GF 3 Ti200 - Gainward G4 mx 440 - Gainward gf2 450

  6. #6
    Junior Member Newbie
    Join Date
    Apr 2002
    Posts
    13

    Re: Problem with GL Extensions

    Sorry for my english, hope you understand it.
    As I wrote, I got the same problem. I have tried as I wrote a lot of videocards it same on all of them. I agree Ender21, the graphics get broken up into horizontal sections.
    If you have a building in front og you, and you look at the corners, its often draw(made) like a horizonatal line...if you now move the mouse form left to right the line will be broken into horizontal sections.

    I also turned off the GL Extensions in RTCW yesterday and the it fixed the problem,...but to day it was back, it didnt help to turn it off.

    I have tried with win98, win2000 and XP.

    What is it ? I have talked with some people here in Norway, and some of them have it to.

    My Direct 3d games also have problems, not with the lines, but if Im playing NHL2002 and move the skater from the center an out to the sides in that part, he is in a way shaking a little bit, then he get to the side and skate straight ahead again everything is OK.

    Ender21, please mail me if you find out something ! I will also work on it !

    It drives me crazy !!

    All the best from Norway,

    Erot71@yahoo.no

  7. #7
    Junior Member Newbie
    Join Date
    Apr 2002
    Posts
    13

    Re: Problem with GL Extensions

    Anyone?

  8. #8
    Guest

    Re: Problem with GL Extensions

    I also have this problem, MOHAA and ea games...anyone know what is going on?

  9. #9
    Junior Member Newbie
    Join Date
    Apr 2002
    Posts
    13

    Re: Problem with GL Extensions

    Anyone have any ideas ?

    I know you can get into the config and change the swapinterval, but the game go much slower...

  10. #10
    Guest

    Re: Problem with GL Extensions

    I'd just like to put in my two cents and say that I am having the same problem with my games. Jedi Knight 2 has those tearing problems and it goes away when you turn off GL Extensions. I haven't been able to figure out how to stop it yet, I'll post here when/if I do.

    Specs:
    GeForce 4 Ti 4600 (newest drivers)
    512 ram, Win XP, P4 2.2ghz

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