johnnash wrote:
> i am writing a scientific software in C language which will be use for
> calculation of radar cross section of large aerospace/marine objects.
> the technique i will be using is ray tracing. The aerospace/marine
> objects will be modelled by using NURBS surfaces. So a cad file
> containing these geometrical entities will be the input to my
> software. My questions are
>
> 1. how can i read such cad files in C language ?

Is this any specific cad file format? If so which one?

What do you mean by ray tracing? That is normally a technique for rendering
a view of the objects.

--
Bart