Hello,

I can't reproduce this behaviour (though I didn't try very hard).
Could you send some specific code which produces bus error on your setup?

By the way, you make a Storable instance for () yourself:

instance Storable () where
  alignment _ = 1
  sizeOf _ = 0
  poke _ _ = return ()
  peek _ = return ()

Balazs

On Wed, Mar 11, 2009 at 7:15 PM, Jules Bean <jules@jellybean.co.uk> wrote:
Hi,

I've just written some code which uses 'tessellate' from Graphics.Rendering.OpenGL.GLU.Tessellation and whilst it works exactly as expected on simple data sets, it gives a bus error on larger ones (not that large - e.g. 150 points).

This might be a bug in my OS's glu implementation, but I'm also inclined to suspect a bug in all the peeks and pokes HOpenGL uses to handle the data for the callbacks. I don't actually use the callback data (I've set all the data to (0 :: Int) only because there is no storable instance for ()).

Does anyone have a success story with this function? Has anyone used it successfully on larger polygons?

Jules  
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