CGAL users discussion list

["Max" <>]

Hello,

I once had similar experience. I was attempting to read an OFF file
containing a valid polyhedron from std::ifstream, but failed.

The strange aspect of this problem is that it worked when I
input the data with std::cin and command prompt redirection
as 'interface_polyhedron.exe < my_polyhedron.off'.

B/Rgds
Max

----- Original Message ---- 
From: Stephen Wong
To: 

Sent: 2008-01-13 09:47:55
Subject: [cgal-discuss] Crash on converting Polyhedron_3 to Nef_polyhedron_3 
on an OFFinput.

>
Hi there,

On this seemingly innocent input solid in the form of a OFF file, CGAL's 
Nef_polyhedron_3 constructor using Polyhedron_3 crashes.  I believe that the 
solid represented by the OFF file is valid based on the specification (you 
can see the model in geomview or any other OFF viewer).  I caused this crash 
by modifying the Nef_3.sln's interface_polyhedron:

Polyhedron P ;
std::ifstream fin( "Triangle - Copy.off" ) ;
fin >> P ;
if ( P.is_closed() && P.is_valid() )
{
  Nef_polyhedron_3 N1( poly ) ;
}

Thanks,

Stephen
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