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Thread: Projective Texture problem:REVERSE PROJECTION

  1. 01-25-2002, 03:42 AM #1
    jeppa
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    Projective Texture problem:REVERSE PROJECTION

    I have realized the Projective Texture Mapping to simulate the Spot Light.I have a problem:THE REVERS PROJECTION.What is the correct way to elimiante this problem????
  2. 01-25-2002, 06:58 AM #2
    bakery2k
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    Re: Projective Texture problem:REVERSE PROJECTION

    I did it by placing a user clip plane at the near plane of the frustum for the projector. This culls the geometry behind te near plane, i.e. closer to the light.
  3. 01-25-2002, 09:05 AM #3
    GPSnoopy
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    Re: Projective Texture problem:REVERSE PROJECTION

    Can't it be eliminated via the vertex programs?
    I've not used them yet but I think it's possible to transform the texture coord from there and then make a simple conditional test to eliminate the unwanted part (I remember you can't directly do conditional instructions but NVIDIA has some example on how to do pseudo-conditional instructions)
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