iPhone OpenGL ES 2 lacks the gl_NormalMatrix. Do we have to roll our own matrix inversion code?

Posted by dugla on Stack Overflow See other posts from Stack Overflow or by dugla
Published on 2010-03-02T23:37:04Z Indexed on 2010/05/02 18:18 UTC
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opengl-es

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iphone

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ipad

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inverse-matrix

One of the most annoying differences between OpenGL shading language and OpenGL ES shading language is the wholesale ommission of all OpenGL matrix state variables (gl_ModelViewMatrix, etc.). Should I go ahead and roll my own matrix inversion code or is there a library that I can use?

Thanks in advance.

-Doug

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