Michael Baker
However, I'm struggling a bit because I haven't used Haskell's foreign interface before. Here is an attempt which is expected to draw a triangle, but instead draws nothing: http://hpaste.org/83837
The first thing I notice is that you never set a vertex color, which is black by default in all cases I've encountered. So it may be drawing, but you may simply not see it. =) Before you begin drawing put this somewhere: glColor3f 1 0 0 That should draw a red shape. Another option is to set a different clear color: glClearColor 1 0 0 1 That sets a red background.
Does anyone know of a tutorial for OpenGLRaw or the foreign interface that might help me understand how to marshall data around? It seems like many people turn to OpenGLRaw when they're learning OpenGL so that they can follow the tutorials. I imagine it would be useful to have a guide out there that covers how to actually use it.
My recommendation is to go with the higher level OpenGL library. The main difference is that the `gl` prefix is dropped and the numerous similar functions (`color2f`, `color3f`, `color4f`, etc.) are collapsed into a single polymorphic function `color`: import qualified Graphics.Rendering.OpenGL as GL GL.color (GL.Color3 1 0 (0 :: GL.GLfloat)) This looks more complicated, but it makes other things a lot easier, so in the end you win. Greets, Ertugrul -- Not to be or to be and (not to be or to be and (not to be or to be and (not to be or to be and ... that is the list monad.