In article <tf6c1qif4doe20 / corp.supernews.com>,
 "Lyle Johnson" <ljohnson / resgen.com> writes:

>You need the OpenGL extensions for Ruby. 
>
> [snip]
> 
>For more information, check the "Library/Graphics/OpenGL Interface"
>entry in the Ruby Application Archive: 

Thanks for the links!  I'll make sure to check the RAA in future.

Cheers, 

Jeremy