The class Triangulation_vertex_base_3 is a model of the concept TriangulationVertexBase_3, the base vertex of a 3D-triangulation. This class stores a point.
This class can be used directly or can serve as a base to derive other classes with some additional attributes (a color for example) tuned for a specific application.
The first template argument is the geometric traits class TriangulationTraits_3 which provides the point type, Point_3. Users of the geometric triangulations (Section 28.2 and Chapter 27) are strongly advised to use the same geometric traits class TriangulationTraits_3 as the one used for Triangulation_3. This way, the point type defined by the base vertex is the same as the point type defined by the geometric traits class.
The second template argument is a combinatorial vertex base class from which Triangulation_vertex_base_3 derives. It has the default value Triangulation_ds_vertex_base_3<>.