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## AlphaShapeVertex_3

### Definition

This concept describe the requirements for the base vertex of an alpha shape.

### Refines

TriangulationVertexBase_3.

### Types

AlphaShapeVertex_3::Point
| Must be the same as the point type provided by the geometric traits class of the triangulation.
AlphaShapeVertex_3::Alpha_status;
| Must be CGAL::Alpha_status<NT> where NT is the number type used in the geometric traits class of the triangulation.

### Creation

AlphaShapeVertex_3 v;
| default constructor.
AlphaShapeVertex_3 v ( Point p);
| constructor setting the point associated to.
AlphaShapeVertex_3 v ( Point p, void* c);
| constructor setting the point associated to and an incident cell.

### Modifiers

Alpha_status* | v.get_alpha_status ()
|  | Returns a pointer the alpha status of the vertex.

### See Also

CGAL::Alpha_status

Next: Alpha_shape_3<Dt>

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The CGAL Project . Tue, December 21, 2004 .