Re: [2/5] WineD3D: Use 0/0/0 as normal if no normal is supplied

[H. Verbeet]

I'm not sure about this one. Unless explicitly checked for, (0, 0, 0)
will cause a division by zero when trying to normalize it, and I don't
know for sure if GL has well defined behaviour for it.

[2/5] WineD3D: Use 0/0/0 as normal if no normal is supplied

[Stefan Dösinger]

Am Dienstag, 21. August 2007 12:57 schrieb H. Verbeet:
> I'm not sure about this one. Unless explicitly checked for, (0, 0, 0)
> will cause a division by zero when trying to normalize it, and I don't
> know for sure if GL has well defined behaviour for it.
> You're right, this patch is asking for problems with normalization. Perhaps we 
> should disable normalization if no normals are provided, but I will double 
> check the lighting equations first for divisions by zero, but afair there's 
> only a cross product and a multiplication there.