The concept AlphaShapeTraits_3 describes the requirements
for the geometric traits class
of the underlying Delaunay triangulation of a basic alpha shape.
In addition to the requirements described in the concept
DelaunayTriangulationTraits_3,
the geometric traits class of a
Delaunay triangulation plugged in a basic alpha shapes
provides the following.
Types
AlphaShapeTraits_3::NT
A number type compatible with the type used for
the points coordinate.
AlphaShapeTraits_3::Compute_squared_radius_3
An object constructor able to compute the squared radius of the
smallest circumsphere of 4 points p0, p1, p2, p3,
the squared radius of the
smallest circumsphere of 3 points p0, p1, p2,
and the squared radius of smallest circumsphere
of the points p0, p1.
