CGAL 4.7 - 2D Segment Delaunay Graphs: SegmentDelaunayGraphHierarchyVertexBase_2 Concept Reference

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CGAL 4.7 - 2D Segment Delaunay Graphs

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SegmentDelaunayGraphHierarchyVertexBase_2 Concept Reference
Concepts

## Definition

The vertex of a segment Delaunay graph included in a segment Delaunay graph hierarchy has to provide some pointers to the corresponding vertices in the graphs of the next and preceeding levels. Therefore, the concept `SegmentDelaunayGraphHierarchyVertexBase_2` refines the concept `SegmentDelaunayGraphVertexBase_2`, by adding two vertex handles to the correponding vertices for the next and previous level graphs.

Refines:
  `SegmentDelaunayGraphVertexBase_2`

Types

`SegmentDelaunayGraphHierarchyVertexBase_2` does not introduce any types in addition to those of `SegmentDelaunayGraphVertexBase_2`.

Creation

The `SegmentDelaunayGraphHierarchyVertexBase_2` concept does not introduce any constructors in addition to those of the `SegmentDelaunayGraphVertexBase_2` concept.

Has Models:
  CGAL::Segment_Delaunay_graph_hierarchy_vertex_base_2<CGAL::Segment_Delaunay_graph_vertex_base_2<Gt,SSTag> >

See Also
  `SegmentDelaunayGraphDataStructure_2`
  `SegmentDelaunayGraphVertexBase_2`
  `CGAL::Segment_Delaunay_graph_hierarchy_2<Gt,DS>`
  `CGAL::Triangulation_data_structure_2<Vb,Fb>`
  `CGAL::Segment_Delaunay_graph_vertex_base_2<Gt,SSTag>`
  `CGAL::Segment_Delaunay_graph_hierarchy_vertex_base_2<Vbb>`

## Operations

Vertex_handle | up ()
| Returns a handle to the corresponding vertex of the next level segment Delaunay graph. More...
Vertex_handle | down ()
| Returns a handle to the corresponding vertex of the previous level segment Delaunay graph. More...
void | set_up (Vertex_handle u)
| Sets the handle for the vertex of the next level segment Delaunay graph.
void | set_down (Vertex_handle d)
| Sets the handle for the vertex of the previous level segment Delaunay graph.

## Member Function Documentation

Vertex_handle SegmentDelaunayGraphHierarchyVertexBase_2::down | ( | ) |  |

Returns a handle to the corresponding vertex of the previous level segment Delaunay graph.

If such a vertex does not exist `Vertex_handle()` is returned.

Vertex_handle SegmentDelaunayGraphHierarchyVertexBase_2::up | ( | ) |  |

Returns a handle to the corresponding vertex of the next level segment Delaunay graph.

If such a vertex does not exist `Vertex_handle()` is returned.