I don't want to use the GL types directly since the OpenGL renderer is not
exposes in the rest of the API.
I was hoping that realToFrac would be a nop in case it would be identical to
an unsafeCoerce.
I guess one could make rules for that, but this tickets makes me wander if
that really works:
http://hackage.haskell.org/trac/ghc/ticket/1434
On Wed, Sep 30, 2009 at 4:58 PM, Roel van Dijk
If you are *really* sure that the runtime representation is the same you could use usafeCoerce. You could use a small test function for profiling, something like:
convertGLfloat :: GLfloat -> Float convertGLFloat = realToFrac -- convertGLFloat = unsafeCoerce
and toggle between the two (assuming you won't get a segmentation fault).
Another option is to not convert at all but use the GL types everywhere. Either explicitly or by exploiting polymorphism.