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Thread: dot product bump mapping

  1. #1
    Intern Contributor
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    Oct 2002
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    dot product bump mapping

    Hello

    How can i do dotproduct bump mapping without register combiners?
    My problem is register combiners is an extension from nvidia, when i use another card than a geforce, than i would have a problem in my opinion.

    thank you for reply

    helda

  2. #2
    Senior Member OpenGL Guru knackered's Avatar
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    Re: dot product bump mapping

    Look at these extensions:- http://oss.sgi.com/projects/ogl-samp...nv_combine.txt http://oss.sgi.com/projects/ogl-samp...v_crossbar.txt http://oss.sgi.com/projects/ogl-samp...e_env_dot3.txt

    They basically combine to give you the register combiner functionality but for all cards that support OpenGL 1.3.
    Knackered

  3. #3
    Member Regular Contributor Julien Cayzac's Avatar
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    Re: dot product bump mapping

    Originally posted by knackered:
    Look at these extensions:- http://oss.sgi.com/projects/ogl-samp...nv_combine.txt http://oss.sgi.com/projects/ogl-samp...v_crossbar.txt http://oss.sgi.com/projects/ogl-samp...e_env_dot3.txt

    They basically combine to give you the register combiner functionality but for all cards that support OpenGL 1.3.
    Wrong. ARB_texture_env_crossbar has been promoted only since 1.4.

    Julien.

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