CGAL 5.1.2 - 2D Apollonius Graphs (Delaunay Graphs of Disks)
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The vertex of an Apollonius graph included in an Apollonius graph hierarchy has to provide some pointers to the corresponding vertices in the graphs of the next and preceding levels. Therefore, the concept ApolloniusGraphHierarchyVertexBase_2
refines the concept ApolloniusGraphVertexBase_2
, by adding two vertex handles to the corresponding vertices for the next and previous level graphs.
Types
ApolloniusGraphHierarchyVertexBase_2
does not introduce any types in addition to those of ApolloniusGraphVertexBase_2
.
Creation | |
ApolloniusGraphHierarchyVertexBase_2 () | |
Default constructor. | |
ApolloniusGraphHierarchyVertexBase_2 (Site_2 s). | |
Constructs a vertex associated with the site s and embedded at the center of s . | |
ApolloniusGraphHierarchyVertexBase_2 (Site_2 s, Face_handle f). | |
Constructs a vertex associated with the site s , embedded at the center of s , and pointing to face f . | |
Operations | |
Vertex_handle | up () |
Returns a handle to the corresponding vertex of the next level Apollonius graph. More... | |
Vertex_handle | down () |
Returns a handle to the corresponding vertex of the previous level Apollonius graph. | |
void | set_up (Vertex_handle u) |
Sets the handle for the vertex of the next level Apollonius graph. | |
void | set_down (Vertex_handle d) |
Sets the handle for the vertex of the previous level Apollonius graph;. | |
Vertex_handle ApolloniusGraphHierarchyVertexBase_2::up | ( | ) |
Returns a handle to the corresponding vertex of the next level Apollonius graph.
If such a vertex does not exist Vertex_handle(nullptr)
is returned.