Re: [Mesa3d-dev] divide by zero in triangle.c

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

"Jacob (=Jouk) Jansen" wrote:
> 
> Hi All,
> 
> I detected a problem in near_persp_textured_triangle defined in triangle.c.
> Below I reprinted the INNER_LOOP to show what goes wrong:
>  The INNER_LOOP is started for one case with
>     ss=dsdx=0
>     tt=vv
>    and thus dx_tex=dy_tex=0.0.
>    For these values the path leads to the point where I inserted the print
>     of "test4". Than it crashes while it tries to divide by dx_tex which is
>     zero.
> 
>   What is intended here for this special case?
> 
>                  Jouk

I'm forwarding this report to Klaus Niederkrueger <kl...@ma...>
since he wrote the function and I'm not sure that he's on this mailing list.

If the bug can't be fixed this optimized triangle function will have to be
disabled.

-Brian