[HOpenGL] GLU.Tessellator crashes

[Sven Panne]

Am Freitag, 13. März 2009 00:39:49 schrieb Balazs Komuves:
> I found the cause of the crashes. A patch which should solve the problem
> (but changes the API, see below) is attached.
> [...]
> Since the vertex annotations are of arbitrary type, there is no default
> value we could supply when GLU gives us zero pointers; [...]

Well spotted! The SGI tessellator is the de facto standard, so we should 
really handle this bug. Although a list of (weight, property) pairs might 
really be better, I am extremely reluctant to change the API, but it turns out 
that we don't have to: We *have* a default value, namely the first vertex 
passed to the combiner. This is never NULL and the weights for the NULL 
vertices are always zero, so we can happily use this. A corresponding patch 
has been committed.

Cheers,
   S.