CGAL users discussion list

[Laurent Rineau <>]

On Monday 01 December 2008 05:42:39 Sebastian Marino wrote:
> I was only playing around with this, however, I use the following
> block of code to extract the facets from such a triangulation:
>
>       std::map<Vertex_handle, unsigned int> vh_to_index_map;
>       unsigned int index( 0 ); for(
> CGAL::Complex_2_in_triangulation_3<Tr>::Vertex_iterator iter(
> c2t3.vertices_begin() ); iter != c2t3.vertices_end(); iter++ )
>       {
>               const Vertex_handle vh( static_cast<Vertex_handle>( iter ) );

No need for the static_cast: it is done automatically. Actually, there is no 
need for that variable "vh" at all.

>               const Vertex v( *vh );

No need for "v".

>               const Point p( v.point() );

You can use "iter->point()", instead of "v.point()".

>               const double x( p.x() );
>               const double y( p.y() );
>               const double z( p.z() );
>               _vertices.push_back( Imath::V3d( x, y, z ) );
>               vh_to_index_map[vh] = index++;

Idem: you can use "vh_to_index_map[iter]", because the type of "iter" is 
castable to "Vertex_handle" (there is a cast operator defined in the iterator 
type).

-- 
Laurent Rineau, PhD
Engineer at GeometryFactory
http://www.geometryfactory.com/