ConstrainedTriangulationFaceBase_2

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

Types

Access Functions

bool

f.is_constrained ( int i)

returns true if the edge between f and its neighbor f.neighbor(i) is constrained. Precondition:  $$0 i 2.

advanced

Modifiers

void	f.set_constraint ( int i, bool b)	sets the edge between f and its neighbor f.neighbor(i) as a constrained or unconstrained edge according to b.
void	f.set_constraints ( bool c0, bool c1, bool c2)
		sets the status (constrained or unconstrained) of the three edges of f.
void	f.reorient ()	Changes the orientation of f by exchanging vertex(0) with vertex(1) and neighbor(0) with neighbor(1) and the corresponding constrained status.
void	f.ccw_permute ()	performs a counterclockwise permutation of the vertices, neighbors and constrained status of f.
void	f.cw_permute ()	performs a clockwise permutation of the vertices and neighbors and constrained status of f.

Miscellaneous

bool

f.is_valid ()

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

advanced

Has Models

CGAL::Constrained_triangulation_face_base_2<Traits>

See Also