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Thread: Availability of GLU

  1. #1
    Junior Member
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    Mar 2004
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    Australia
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    Availability of GLU

    Hi there,

    I'm wondering if GLU is fully supported by GL ES.

    Interestingly I've just re-compiled a PC app that users OpenGL and it compiles with the GL ES header. That's a good start for me, but I also use GLU.

    I realise that GLU builds on GL so I'm optimistic about getting GLU to work. Specifically I'm using the following out of GLU:

    * GLUquadricObj
    * gluNewQuadric
    * gluQuadricTexture
    * gluSphere
    * gluDeleteQuadric

    Thanks for any info.

    Cheers,
    -C

  2. #2
    Member
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    Sep 2003
    Location
    Silicon Valley
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    57

    Re: Availability of GLU

    We have discussed defining a GLU ES, but haven't felt much demand for it yet.

    Porting the desktop GLU code to run on OpenGL ES would be a nontrivial task, since it uses evaluators, fine grained vertex calls (glBegin/End), and dynamic glGets, none of which are supported by OpenGL ES 1.0. Still, it might make an interesting project for someone so inclined. Porting it to work with the Common-Lite profile might be close to impossible, as the tesselation code in particular uses lots of floating point.
    Jon Leech
    EGL & OpenGL Specification Editor / OpenGL ARB Ecosystem TSG Chair / Khronos API Registrar

  3. #3
    Junior Member
    Join Date
    Dec 2003
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    Helsinki, Finland
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    Re: Availability of GLU

    Implementing GLU that properly preserves the GL state (as the MESA implementation does) is not only difficult, but impossible with OpenGL ES 1.0 (no dynamic gets, and vertex array data needs to be modified). A version that leaks state (although possibly in a documented fashion) is of course doable.

    cheers,
    -wili
    --
    o Ville Miettinen, CTO, Hybrid Graphics
    o http://www.hybrid.fi
    Ville Miettinen, NVIDIA

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