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Thread: Texture coordinates

  1. #1
    Junior Member Newbie
    Join Date
    Nov 2000

    Texture coordinates

    I'm coded a program, which simply imports and visualizes a data, containing in .ASE file.

    ASE file format is simple text, generated by 3D Studio Max.

    While using Vertex coordinates, faces and e.t.c. - there is no problems.

    But: texture mapping coordinates in this file is given in three float values (in bounds between 0.00 to 1.00) instead of two, for mapping a 2-d textures.

    Is it correct to use these coordinates to produce texture coordinates in OpenGL?

    I'm not quite understand the "r" and "q" coordinates in texture mapping in OpenGL function glTexCoord4f(s,t,r,q).
    How "r" and "q" affect the visualization of 2-D texture?

    Also, i can't find anywhere the explanation and/or examples how to use 3 or 4 mapping coordinates.

  2. #2
    Senior Member OpenGL Pro
    Join Date
    Dec 2007

    Re: Texture coordinates

    I assume that the 3rd component in the ASE files stand for the 3D textures coordinates. So, simply use glTexCoord2f() and put in only the first two.

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