CGAL 5.1.3 - 3D Alpha Shapes
FixedAlphaShapeVertex_3 Concept Reference

## Definition

The concept FixedAlphaShapeVertex_3 describes the requirements for the base vertex of a alpha shape with a fixed value alpha.

Refines:

TriangulationVertexBase_3, if the underlying triangulation of the alpha shape is a Delaunay triangulation.

RegularTriangulationVertexBase_3, if the underlying triangulation of the alpha shape is a regular triangulation.

Periodic_3TriangulationDSVertexBase_3, if the underlying triangulation of the alpha shape is a periodic triangulation.

Has Models:
CGAL::Fixed_alpha_shape_vertex_base_3 (templated with the appropriate triangulation vertex base class).

## Types

typedef unspecified_type Point
Must be the same as the point type provided by the geometric traits class of the triangulation.

## Creation

FixedAlphaShapeVertex_3 ()
default constructor.

FixedAlphaShapeVertex_3 (Point p)
constructor setting the point.

FixedAlphaShapeVertex_3 (Point p, const Cell_handle &c)
constructor setting the point and an incident cell.

## Access Functions

bool is_on_chull ()
Returns a boolean indicating whether the point is on the convex hull of the point of the triangulation.

Classification_type get_classification_type ()
Returns the classification of the vertex.

## Modifiers

void set_classification_type (Classification_type type)
Sets the classification of the vertex.

void is_on_chull (bool b)
Sets whether the vertex is on the convex hull.