CGAL::Polyhedron_traits_3< Kernel > Class Template Reference

#include <CGAL/Polyhedron_traits_3.h>

Definition

The class Polyhedron_traits_3 is a model of the PolyhedronTraits_3 concept.

It defines the geometric types and primitive operations used in the polyhedral surface data structure Polyhedron_3<PolyhedronTraits_3> in terms of the CGAL Kernel. It keeps a local copy of the kernel which makes it suitable for kernels with local state.

Is Model Of:

PolyhedronTraits_3

See also

CGAL::Polyhedron_traits_with_normals_3<Kernel>

Implementation

Since the PolyhedronTraits_3 concept is a subset of the concept Kernel, this class just forwards the relevant types and access member functions from its template argument. However, it is useful for testing sufficiency of requirements.

Example

Instantiation of a polyhedral surface with the Cartesian kernel based on double coordinates.

File Polyhedron/polyhedron_prog_simple.cpp

#include <CGAL/Simple_cartesian.h>
#include <CGAL/Polyhedron_3.h>

typedef CGAL::Simple_cartesian<double>     Kernel;
typedef CGAL::Polyhedron_3<Kernel>         Polyhedron;
typedef Polyhedron::Halfedge_handle        Halfedge_handle;

int main() {
    Polyhedron P;
    Halfedge_handle h = P.make_tetrahedron();
    if ( P.is_tetrahedron(h))
        return 0;
    return 1;
}

Types
typedef unspecified_type	Kernel
	the Kernel model.
typedef Kernel::Point_3	Point_3
typedef Kernel::Plane_3	Plane_3
typedef Kernel::Construct_opposite_plane_3	Construct_opposite_plane_3

Creation
	Polyhedron_traits_3 ()
	default constructor, uses Kernel() as local reference to the kernel.
	Polyhedron_traits_3 (const Kernel &kernel)
	stores kernel as local reference.

Operations
Construct_opposite_plane_3	construct_opposite_plane_3_object ()
	forwarded to kernel.