Hi Balazs, That sounds nice, but is there any timeline for replacing types used by current version of OpenGL by those in vect? Since as far as I understand, vect-opengl gives just typecasts, and thus doesn't really address a problem of using many different Vector/Vertex types in place of one, and requiring typecasts. Thus we have AC-Vector that serves similar purpose as vect (and probably few more similar packages, like hmatrix.)
the vect library: http://hackage.haskell.org/package/vect and its OpenGLl companion: http://hackage.haskell.org/package/vect-opengl
were written specifically for doing computer graphics. It probably contains all vector/matrix operations you need. If this is not the case, I'm happy to hear suggestions.
I don't think there is a better alternative at the moment (definitely nothing close in coverage of functionality). (disclaimer: I'm the author of these)
Historical note: The Tensor package was born because the original author of the OpenGL package felt that it makes sense to make it separate from the big OpenGL package. He planned a serious refactoring/rewrite of the OpenGL package. However, he seems to have disappeared since. -- Best regards Michal