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[徐松 <>]

thank you for your help!

2012/3/5 Sebastien Loriot (GeometryFactory) <>

OFF_to_nef_3 is a function that should be used when the OFF file is not
a valid Polyhedron. This function considers support planes of all facets and do its best to build a nef polyhedron.

If your input OFF is a valid Polyhedron then first create a polyhedron
and use the constructor of Nef from a polyhedron.

do something like that:
#include <CGAL/IO/Polyhedron_iostream.h>

std::ofstream file("myoff.off");
Polyhedron_3<Kernel> P;
file >> P;

Nef_polyhedron_3<Kernel> nef(P);

Sebastien.

On 03/03/2012 05:04 AM, BOSS wrote:

Generating a Nef_Polyhedron_3  from  a .off file  is  my goal .
I use the OFF_to_nef_3 to transfer .off file to a Nef Polyhedron.
But I find the time spent is so long.Sometimes the  time  may be beyond 5
minutes.
Should I do something when I use the OFF_to_nef_3 ?
Is there another way  to achieve the same goal ?
I hope somebody can help me or give me some suggests.
Thanks.

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