CGAL 6.0.1 - dD Triangulations
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TriangulationDSFace Concept Reference

Definition

A TriangulationDSFace describes a face f with dimension k (a k-face) in a triangulation. It gives access to a handle to a full cell c containing the face f in its boundary, as well as the indices of the vertices of f in c. It must hold that f is a proper face of full cell c, i.e., the dimension of f is strictly less than the dimension of c. The dimension of a face is implicitly set when TriangulationDSFace::set_index is called. For example, if TriangulationDSFace::set_index is called two times to set the first two vertices (i = 0 and i = 1), then the dimension is 1.

Has models
CGAL::Triangulation_face<TriangulationDataStructure_>
See also
TriangulationDSFullCell
TriangulationDSVertex
TriangulationDataStructure

Types

typedef unspecified_type Triangulation_data_structure
 The Triangulation_data_structure in which the TriangulationDSFace is defined/used.
 
typedef unspecified_type Full_cell_handle
 Must be the same as the nested type Triangulation_data_structure::Full_cell_handle.
 
typedef unspecified_type Vertex_handle
 Must be the same as the nested type Triangulation_data_structure::Vertex_handle.
 

Creation

There is no default constructor, since the maximal dimension (of the full cells) must be known by the constructors of a TriangulationDSFace.

 TriangulationDSFace (TriangulationDSFace g)
 Copy constructor.
 
 TriangulationDSFace (Full_cell_handle c)
 Sets the face's full cell to c and the maximal dimension to c.maximal_dimension().
 
 TriangulationDSFace (const int md)
 Setup the face knowing the maximal dimension md.
 

Access Functions

Full_cell_handle full_cell () const
 Returns a handle to a cell that has the face in its boundary.
 
int face_dimension () const
 Returns the dimension of the face (one less than the number of vertices).
 
int index (int i) const
 Returns the index of the i-th vertex of the face in the cell f.full_cell().
 
Vertex_handle vertex (int i) const
 Returns a handle to the i-th Vertex of the face in the cell f.
 

Update Functions

void clear ()
 Sets the facet to the empty set.
 
void set_full_cell (Full_cell_handle c)
 Sets the cell of the face to c.
 
void set_index (int i, int j)
 Sets the index of the i-th vertex of the face to be the j-th vertex of the full cell.
 

Member Typedef Documentation

◆ Triangulation_data_structure

The Triangulation_data_structure in which the TriangulationDSFace is defined/used.

Must be a model of the TriangulationDataStructure concept.

Constructor & Destructor Documentation

◆ TriangulationDSFace() [1/2]

TriangulationDSFace::TriangulationDSFace ( Full_cell_handle  c)

Sets the face's full cell to c and the maximal dimension to c.maximal_dimension().

Precondition
c!=Full_cell_handle()

◆ TriangulationDSFace() [2/2]

TriangulationDSFace::TriangulationDSFace ( const int  md)

Setup the face knowing the maximal dimension md.

Sets the face's full cell to the default-constructed one.

Member Function Documentation

◆ clear()

void TriangulationDSFace::clear ( )

Sets the facet to the empty set.

Maximal dimension remains unchanged.

◆ index()

int TriangulationDSFace::index ( int  i) const

Returns the index of the i-th vertex of the face in the cell f.full_cell().

Precondition
\(0 \leq i \leq \)f.face_dimension().

◆ set_full_cell()

void TriangulationDSFace::set_full_cell ( Full_cell_handle  c)

Sets the cell of the face to c.

Precondition
c!=Full_cell_handle()

◆ set_index()

void TriangulationDSFace::set_index ( int  i,
int  j 
)

Sets the index of the i-th vertex of the face to be the j-th vertex of the full cell.

Precondition
\(0 \leq i \leq \) f.full_cell()->face_dimension().
\(0 \leq j \leq \) f.full_cell()->maximal_dimension().

◆ vertex()

Vertex_handle TriangulationDSFace::vertex ( int  i) const

Returns a handle to the i-th Vertex of the face in the cell f.

full_cell().

Precondition
\(0 \leq i \leq \) f.face_dimension().