Re: problem with output of the program on different OS

On May 12, 10:17=A0am, pereges <Brol...@[EMAIL PROTECTED]
> wrote:
> On May 10, 12:43 am, Bart <b...@[EMAIL PROTECTED]
> wrote:

> > But it's also possible there's a bug in Pelles C.
>
> Right now, it seems PellesC is the only one giving a different result.

Been trying to investigate further, but's it's getting more complex
and Pelles' IDE is a right pain to use.

The figures for radar->E_scattered start to divulge at ray_count=3D463
(they are the same at ray_count=3D462).

The immediate culprit is r.pathlength, but this is traced to
intersect_triangle(). I stored the last det value calculated in
intersect_triangle, and the results were for ray_count=3D462, 463, 464:

0.550692 0.550692 0.329331 on main compilers
0.550692 0.329331 0.329331 on Pelles C

Why is the middle one different? Might be a different pattern of
calling intersect_triangle(), which is where it starts to get
complicated.

Perhaps you should forget Pelles C. You might do a lot of work just to
discover some obscure bug in the compiler (on the other hand, you
might well find some undefined behaviour in your program and maybe all
the results were wrong).


--
Bartc