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/*=========================================================================
Program: Visualization Toolkit
Module: vtkUndirectedGraph.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
/*-------------------------------------------------------------------------
Copyright 2008 Sandia Corporation.
Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
/**
* @class vtkUndirectedGraph
* @brief An undirected graph.
*
*
* vtkUndirectedGraph is a collection of vertices along with a collection of
* undirected edges (they connect two vertices in no particular order).
* ShallowCopy(), DeepCopy(), CheckedShallowCopy(), CheckedDeepCopy()
* accept instances of vtkUndirectedGraph and vtkMutableUndirectedGraph.
* GetOutEdges(v, it) and GetInEdges(v, it) return the same list of edges,
* which is the list of all edges which have a v as an endpoint.
* GetInDegree(v), GetOutDegree(v) and GetDegree(v) all return the full
* degree of vertex v.
*
* vtkUndirectedGraph is read-only. To create an undirected graph,
* use an instance of vtkMutableUndirectedGraph, then you may set the
* structure to a vtkUndirectedGraph using ShallowCopy().
*
* @sa
* vtkGraph vtkMutableUndirectedGraph
*/
#ifndef vtkUndirectedGraph_h
#define vtkUndirectedGraph_h
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkGraph.h"
VTK_ABI_NAMESPACE_BEGIN
class VTKCOMMONDATAMODEL_EXPORT vtkUndirectedGraph : public vtkGraph
{
public:
static vtkUndirectedGraph* New();
vtkTypeMacro(vtkUndirectedGraph, vtkGraph);
void PrintSelf(ostream& os, vtkIndent indent) override;
/**
* Return what type of dataset this is.
*/
int GetDataObjectType() override { return VTK_UNDIRECTED_GRAPH; }
/**
* Returns the full degree of the vertex.
*/
vtkIdType GetInDegree(vtkIdType v) override;
/**
* Random-access method for retrieving the in edges of a vertex.
* For an undirected graph, this is the same as the out edges.
*/
vtkInEdgeType GetInEdge(vtkIdType v, vtkIdType i) override;
/**
* Random-access method for retrieving incoming edges to vertex v.
* The method fills the vtkGraphEdge instance with the id, source, and
* target of the edge. This method is provided for wrappers,
* GetInEdge(vtkIdType, vtkIdType) is preferred.
*/
void GetInEdge(vtkIdType v, vtkIdType i, vtkGraphEdge* e) override
{
this->Superclass::GetInEdge(v, i, e);
}
///@{
/**
* Retrieve a graph from an information vector.
*/
static vtkUndirectedGraph* GetData(vtkInformation* info);
static vtkUndirectedGraph* GetData(vtkInformationVector* v, int i = 0);
///@}
/**
* Initialize the iterator to get the incoming edges to a vertex.
* For an undirected graph, this is all incident edges.
*/
void GetInEdges(vtkIdType v, vtkInEdgeIterator* it) override { Superclass::GetInEdges(v, it); }
/**
* Check the structure, and accept it if it is a valid
* undirected graph. This is public to allow
* the ToDirected/UndirectedGraph to work.
*/
bool IsStructureValid(vtkGraph* g) override;
protected:
vtkUndirectedGraph();
~vtkUndirectedGraph() override;
/**
* For iterators, returns the same edge list as GetOutEdges().
*/
void GetInEdges(vtkIdType v, const vtkInEdgeType*& edges, vtkIdType& nedges) override;
private:
vtkUndirectedGraph(const vtkUndirectedGraph&) = delete;
void operator=(const vtkUndirectedGraph&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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