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Type: Posts; User: JWeaver

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    Re: Cardinal Spline

    http://cubic.org/~submissive/sourcerer/hermite.htm#ma5.1
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    glListBase errors

    Is the glListBase function valid to use inside of a display list? I can't find anywhere that says it can't be used when nesting display lists but it doesn't seem to work. Any ideas?

    James
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    Re: MDI MFC degrading performance

    Try using 1 OpenGL context shared amoung all of the views.

    For multiple contexts, I had a similar problem when calling wglMakeCurrent before deleteing the context in OnDestroy. Graphics would...
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    Re: GL_EYE_LINEAR in a vertex program

    I needed to invert the transposed modelview matrix.

    James
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    GL_EYE_LINEAR in a vertex program

    I am trying to implement GL_EYE_LINEAR texgen in a vertex program. For each s, t, q, and r, I am replacing:
    glTexGenfv(GL_S, GL_EYE_PLANE, p);
    with (cMatrix is modelview matrix inverted):
    ...
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    Re: Software Anti-Aliasing

    jwatte

    Sounds like the only difference from what your suggesting and what I am doing is where the box filter is done. I save a tga at 2x size and use Photoshop to scale it down. Doing the scale...
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    Re: Software Anti-Aliasing

    Rendering to a texture, may be worth investigating for antialiasing a window. It would not suit my needs as I need to render offscreen at a high resolution for print. This adds the need for tiling...
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    Re: Getting smallest mipmap on ATI

    Thanks for the suggestions. I will use those optimizations but nLevel is right it just gives wrong results.

    I am using the latest official drivers.

    James
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    Re: Software Anti-Aliasing

    The approach I use for rendering high resolution images is rendering the scene as tiles <= size of the viewport. You can render a very large image like this using no extensions. Jittering works...
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    Getting smallest mipmap on ATI

    I have a mipmapped RGB texture and I want to get the color of the smallest mipmap. The following works on NVidia and in software mode but not on an 8500. For example, I should get 157,147,128 but I...
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    Disturbing an Environment Map

    I am making a simple water stream and I would like to disturb an environment map on it as the water vertices move. What would be the best way to do this on a Geforce3?
    Should I use a vertex...
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    Re: video card trouble

    I ran into a problem when I switched to this flag that I had to move my create GL context to a little later in the creation cycle so that the DC was created. Your problem may be similar.
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    Re: video card trouble

    I am not familiar with Delphi. Are panels just dialogs? If so, yes you can get it to work. Windows 98 is real picky about that CS_OWNDC. Sounds like they are all sharing the same DC which is what...
  14. Thread: soft or hard ?

    by JWeaver
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    Re: soft or hard ?

    Checking the pixel format or vendor string will only test for 100% software opengl. If it is not a generic format, who knows what the vendor implemented in hardware or software. Still it is useful...
  15. Thread: soft or hard ?

    by JWeaver
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    Re: soft or hard ?

    For Win32 apps, I usually query the pixel format after SetPixelFormat with DescribePixelFormat. I use the following to catch software mode:
    if ((pfd.dwFlags & PFD_GENERIC_FORMAT) > 0)
    {
    ...
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    Re: video card trouble

    Make sure that you are using the CS_OWNDC class style for your window.

    James
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