CGAL users discussion list

["Laurent Rineau (GeometryFactory)" <>]

On Wednesday 15 December 2010 14:50:51 Rosen Diankov wrote:
> Dear CGAL developers,
> 
> We've been considering using parts of the CGAL math backend for a
> robot motion planning environment named OpenRAVE (
> http://openrave.programmingvision.com ) in order get much more
> reliable computation results. The documentation and presentations have
> really hammered in the point that CGAL cares about precision.
> 
> However, looking at the include headers, it seems that the standard
> C++ implementations of atan, asin, sin, cos, etc are used. Does this
> mean that CGAL considers their errors insignificant?

Those math functions are used almost nowhere in CGAL. And where they are used 
the errors were not considered as significant.

In what part of CGAL have you seen a use of those math functions that are too 
inexact for your needs?

> In search for better standard library functions, we stumbled onto crlibm
> 
> http://lipforge.ens-lyon.fr/www/crlibm/
> 
> I'm sure the developers have heard of this library,

Not sure of that. I did not know it, for example.

-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/