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## CGAL::Nef_polyhedron_3<Traits>::Volume

### Definition

A volume is a full-dimensional connected point set in 3. It is bounded by several shells, i.e. a connected part of the boundary incident to a single volume. An entry element to each shell is provided by the iterator range (shells_begin()/shells_end()). A Shell_entry_iterator is assignable to SFace_handle.

#include <CGAL/Nef_polyhedron_3.h>

### Types

The following types are the same as in Nef_polyhedron_3<Traits>.

Nef_polyhedron_3<Traits>::Volume::Mark
| type of mark.
Nef_polyhedron_3<Traits>::Volume::Object_list
| list of Object handles.
Nef_polyhedron_3<Traits>::Volume::Volume_const_handle
| const handle to Volume.
Nef_polyhedron_3<Traits>::Volume::Shell_entry_const_iterator
| const iterator over the entries to all shells adjacent to a volume.

### Creation

There is no need for a user to create a Volume explicitly. The class Nef_polyhedron_3<Traits> manages the needed volumes internally.

### Operations

Mark | c.mark () | the mark of c .
Shell_entry_const_iterator
| c.shells_begin () | const iterator over the entries to all shells adjacent to c .
Shell_entry_const_iterator
| c.shells_end () | past-the-end iterator.

### See Also

CGAL::Nef_polyhedron_3<Traits>::SFace

Next: Nef_polyhedron_3<Traits>::SHalfedge

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The CGAL Project . Tue, December 21, 2004 .