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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.
| bool | f.is_constrained ( int i) |
returns true if the edge between f and its neighbor
f.neighbor(i) is constrained.
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| 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. |
CGAL::Constrained_triangulation_face_base_2<Traits>