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Thread: Problem about textureProj

  1. 03-30-2011, 06:49 AM #1
    apapaxionga
    apapaxionga is offline
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    Problem about textureProj

    textureProj performs a texture lookup with projection.

    Can someone explain in detail for me about the function? i do not know what the "projection " mean in this sentence.
  2. 03-30-2011, 07:09 AM #2
    ZbuffeR
    ZbuffeR is offline
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    Re: Problem about textureProj

    Read :
    http://www.opengl.org/sdk/docs/mangl...extureProj.xml
    The "projection" is the one happening with homogeneous coordinates.
    This is needed to make perspective working correctly, allows to define texcoords at infinity, etc.
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