Re: [Mesa3d-users] Where or where have my polygons gone?

[Brian P. <br...@pr...>]

"Evan M. Carey" wrote:
> 
> Brian Paul wrote:
> 
> >       if (area * bf < 0 || area * area < .0025)
> >          return;
> >
> > Try replacing the .0025 with a smaller value, or zero.
> >
> > -Brian
> 
> Brian,
> 
> I made the predicate like so:
> 
>     if (area * bf < 0 || area * area <= 0)
>         return;
> 
> I realize there might still be problems with excessively small areas but for my
> app this seems to work OK...so far.  Thanks for the reply.  I _really_
> appreciate the quick solution.  If I do end up having problems I know where to
> go to play with the limit.

Great.

Understand that I'm still hesitant to put this change into Mesa
by default.  I distinctly remember problems with FP over/underflow
and tiny triangles.  I don't have time right now to reexamine this
problem in any detail now.

-Brian