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/*=========================================================================
Program: Visualization Toolkit
Module: vtkGraphWeightFilter.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.
=========================================================================*/
/**
* @class vtkGraphWeightFilter
* @brief Base class for filters that weight graph
* edges.
*
*
* vtkGraphWeightFilter is the abstract base class that provides an interface
* for classes that apply weights to graph edges. The weights are added
* as a vtkFloatArray named "Weights."
* The ComputeWeight function must be implemented to provide the function of two
* vertices which determines the weight of each edge.
* The CheckRequirements function can be implemented if you wish to ensure
* that the input graph has all of the properties that will be required
* by the ComputeWeight function.
*/
#ifndef vtkGraphWeightFilter_h
#define vtkGraphWeightFilter_h
#include "vtkFiltersGeneralModule.h" // For export macro
#include "vtkGraphAlgorithm.h"
class vtkGraph;
class VTKFILTERSGENERAL_EXPORT vtkGraphWeightFilter : public vtkGraphAlgorithm
{
public:
vtkTypeMacro(vtkGraphWeightFilter, vtkGraphAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;
protected:
vtkGraphWeightFilter(){}
~vtkGraphWeightFilter() VTK_OVERRIDE {}
int RequestData(vtkInformation *,
vtkInformationVector **,
vtkInformationVector *) VTK_OVERRIDE;
/**
* Compute the weight on the 'graph' for a particular 'edge'.
* This is a pure virtual function that must be implemented in subclasses.
*/
virtual float ComputeWeight(vtkGraph* const graph, const vtkEdgeType& edge) const = 0;
/**
* Ensure that the 'graph' is has all properties that are needed to compute
* the weights. For example, in vtkGraphWeightEuclideanDistanceFilter,
* 'graph' must have Points set for each vertex, as the ComputeWeight
* function calls GetPoint.
*/
virtual bool CheckRequirements(vtkGraph* const graph) const;
private:
vtkGraphWeightFilter(const vtkGraphWeightFilter&) VTK_DELETE_FUNCTION;
void operator=(const vtkGraphWeightFilter&) VTK_DELETE_FUNCTION;
};
#endif
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