Re: [HOpenGL] How to send matrices to GLSL uniform variables

On Fri, Aug 24, 2012 at 6:56 PM, Myles C. Maxfield wrote:

According to http://hackage.haskell.org/package/OpenGL, it claims to support version 3.2, so a lack of glUniformMatrix seems like a huge oversight. This makes me think that one of two things is the case:

1. There is a way to do it, but it's non-obvious. Hopefully documentation could fix this. 2. There isn't a way to do it, so either a. the OpenGL package shouldn't claim to be 3.2 compliant, or b. the functionality should be added ;-)

Does anyone know which case the current package falls into? And/or what can be done about making sure no one else in the future has the same problem that Yusuke has? I'd be willing to help out, but I don't know where to start.

Thanks, Myles

It's point 2. The cabal package claims 3.2 compliance, though it's at most 2.1 compliant (HOpenGLRaw is 3.2 compliant). I've written code for 3.0 compliance (see github [pull request]), but that doens't include it either yet. It should be incorporated in the Uniform typeclass (see Shaders.hs or Sharders/Uniform.hs), but there should be a extra typeclass for matrices or it should be added to the tensor package. Lars [pull request] https://github.com/haskell-opengl/OpenGL/pull/27

On Fri, Aug 24, 2012 at 9:31 AM, Yusuke Kajimoto wrote:

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In general, if you can't find it in HOpenGL, look at OpenGLRaw: http://hackage.haskell.org/package/OpenGLRaw

Thank you for your reply. I achieved my aim using OpenGLRaw just now!

But as there are no methods to access UniformLocation, AttribLocation, VertexShader, FragmentShader and Program type internals, I rewrote almost all of code around GLSL with OpenGLRaw... _______________________________________________ HOpenGL mailing list HOpenGL@haskell.org http://www.haskell.org/mailman/listinfo/hopengl

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