CGAL 5.1.2 - 3D Polyhedral Surface
PolyhedronTraits_3 Concept Reference

Definition

Required types and member functions for the PolyhedronTraits_3 concept. This geometric traits concept is used in the polyhedral surface data structure CGAL::Polyhedron_3<Traits>. Any CGAL kernel is a model of this concept and can be used directly as template argument.

Refines:

CopyConstructible

Assignable

Has Models:

CGAL::Polyhedron_traits_3<Kernel>

CGAL::Polyhedron_traits_with_normals_3<Kernel>

All models of the CGAL::Kernel concept, e.g., CGAL::Simple_cartesian<FieldNumberType>

See also
CGAL::Polyhedron_3<Traits>

Types

typedef unspecified_type Point_3
 point type.
 
typedef unspecified_type Plane_3
 plane equation. More...
 
typedef unspecified_type Construct_opposite_plane_3
 is an unary function object that reverses the plane orientation. More...
 

Creation

 PolyhedronTraits_3 (const PolyhedronTraits_3 &traits2)
 copy constructor.
 
PolyhedronTraits_3operator= (const PolyhedronTraits_3 &traits2)
 assignment.
 

Operations

Construct_opposite_plane_3 construct_opposite_plane_3_object ()
 returns an instance of this function object.
 

Member Typedef Documentation

◆ Construct_opposite_plane_3

is an unary function object that reverses the plane orientation.

Must provide Plane_3 operator()(Plane_3 plane) that returns the reversed plane. Required only if plane equations are supported and the inside_out() method is used to reverse the polyhedral surface orientation.

◆ Plane_3

plane equation.

Even if plane equations are not supported with a particular polyhedral surface this type has to be defined (some dummy type).