ConstrainedTriangulationFaceBase_2 Concept Reference

Definition

In a constrained triangulation, the information about constrained edges is stored in the faces of the triangulation. The base face of a constrained triangulation has to be a model of the concept ConstrainedTriangulationFaceBase_2 which refines the concept TriangulationFaceBase_2 providing functionalities to deal with constraints.

Refines

TriangulationFaceBase_2

Types

Defines the same types as the TriangulationFaceBase_2 concept

Has models

CGAL::Constrained_triangulation_face_base_2<Traits>

See also

TriangulationFaceBase_2

CGAL::Constrained_triangulation_2<Traits,Tds>

CGAL::Constrained_triangulation_face_base_2<Traits>

Access Functions
bool	is_constrained (int i)
	returns true if the edge between the face and its neighbor neighbor(i) is constrained.

Modifiers
void	set_constraint (int i, bool b)
	This is an advanced function.
void	set_constraints (bool c0, bool c1, bool c2)
	This is an advanced function.
void	reorient ()
	This is an advanced function.
void	ccw_permute ()
	This is an advanced function.
void	cw_permute ()
	This is an advanced function.

Miscellaneous
bool	is_valid ()
	This is an advanced function.

Member Function Documentation

ccw_permute()

void ConstrainedTriangulationFaceBase_2::ccw_permute

(

)

This is an advanced function.

Advanced

performs a counterclockwise permutation of the vertices, neighbors and constrained status of the face.

cw_permute()

void ConstrainedTriangulationFaceBase_2::cw_permute

(

)

This is an advanced function.

Advanced

performs a clockwise permutation of the vertices and neighbors and constrained status of the face.

is_constrained()

bool ConstrainedTriangulationFaceBase_2::is_constrained

(

int

i

)

returns true if the edge between the face and its neighbor neighbor(i) is constrained.

Precondition

\( 0\leq i \leq2\).

is_valid()

bool ConstrainedTriangulationFaceBase_2::is_valid

(

)

This is an advanced function.

Advanced

tests the validity of the face as a face of a plain triangulation and additionally checks if the edges of the face are consistently marked as constrained or unconstrained edges in the face and its neighbors.

reorient()

void ConstrainedTriangulationFaceBase_2::reorient

(

)

This is an advanced function.

Advanced

changes the orientation of the face by exchanging vertex(0) with vertex(1) and neighbor(0) with neighbor(1) and the corresponding constrained status.

set_constraint()

void ConstrainedTriangulationFaceBase_2::set_constraint	(	int	i,
		bool	b
	)

This is an advanced function.

Advanced

sets the edge between the face and its neighbor neighbor(i) as a constrained or unconstrained edge according to b.

set_constraints()

void ConstrainedTriangulationFaceBase_2::set_constraints	(	bool	c0,
		bool	c1,
		bool	c2
	)

This is an advanced function.

Advanced

sets the status (constrained or unconstrained) of the three edges of the face.