CGAL 5.2.2 - 2D Alpha Shapes
Has Model Relationships
Concept AlphaShapeFace_2
CGAL::Alpha_shape_face_base_2 (templated with the appropriate triangulation face base class).
Concept AlphaShapeTraits_2

All models of Kernel.

Projection traits such as CGAL::Projection_traits_xy_3<K>.

Concept AlphaShapeVertex_2
CGAL::Alpha_shape_vertex_base_2 (templated with the appropriate triangulation vertex base class).
Concept WeightedAlphaShapeTraits_2

All models of Kernel.

Projection traits such as CGAL::Projection_traits_xy_3<K>.