Balazs Komuves wrote:
I found the cause of the crashes. A patch which should solve the problem (but changes the API, see below) is attached.
[snip]
...but the GLU implementation sets some of those pointers to 0:
How stupid! Good catch.
Since the vertex annotations are of arbitrary type, there is no default value we could supply when GLU gives us zero pointers; thus I changed the type WeightedProperties to
data WeightedProperties v = WeightedProperties (GLclampf, v) (GLclampf, v) (Maybe (GLclampf, v)) (Maybe (GLclampf, v))
Maybe some other solution, like WeightedProperties2 ... | WeightedProperties4 ... would be better...
Maybe just [(GLclampf, v)] ? The docs could note that the list will in practice probably be of length 2 or 4, but most of the situations I can imagine you would treat it more uniformly as a list anyway. Jules