Re: [Haskell-cafe] Re: Where is OpenGL loadMatrix ?

withMatrix doesn't seem to have anything to do with glLoadMatrix. You are right that you can do glLoadMatrix with loadIdentity and multMatrix. To directly load a matrix, use the function "matrix" (with a Nothing argument). This will internally call the loadMatrix function that Krzysztof mentioned (which is correctly not exported). Note that in addition to loading a matrix, the "matrix" function is also used for retrieving the current matrix. (glGetFloatv with argument GL_MODELVIEW_MATRIX and friends). On Thu, Sep 25, 2008 at 5:12 PM, minh thu wrote:

2008/9/25 Achim Schneider :

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"minh thu" wrote:

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I can't find the loadMatrix function in http://hackage.haskell.org/packages/archive/OpenGL/latest/doc/html/Graphics-...

Should I use loadIdentity then multMatrix instead ?

You're supposed to use withMatrix and regard OpenGL not as an imperative language, but as a markup language coincidentally using "do" to specify (flattened) lists. I even read about some library managing display lists transparently for you, but I can't recall where.

If you're right, it's weird there are things like loadIdentity, $=, ... and it is even weirder to not provide loadMatrix (which can be done with loadIdenity and multMatrix).

Anyway, the bindings are not that much functionnal, even with things like withMatrix.

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