## CGAL::Extended_cartesian<FT>

### Definition

The class Extended_cartesian<FT> serves as a traits class for the class CGAL::Nef_polyhedron_2<T>. It uses a polynomial component representation based on a field number type FT.

#include <CGAL/Extended_cartesian.h>

### Is Model for the Concept

ExtendedKernelTraits_2

### Creation

Extended_cartesian<FT> traits;
| default constructor.

### Requirements

To make a field number type FT_model work with this class, you must provide a traits class for this number type: CGAL::Number_type_traits<FT_model> (See the support library manual.)

### Operations

Fits all operation requirements of the concept.

### See Also

CGAL::Extended_homogeneous<RT>
CGAL::Filtered_extended_homogeneous<RT>