vtkKMeansDistanceFunctor.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkKMeansDistanceFunctor_h
#define vtkKMeansDistanceFunctor_h
 
#include "vtkFiltersStatisticsModule.h" // For export macro
#include "vtkObject.h"
 
VTK_ABI_NAMESPACE_BEGIN
class vtkVariantArray;
class vtkAbstractArray;
class vtkTable;
 
class VTKFILTERSSTATISTICS_EXPORT vtkKMeansDistanceFunctor : public vtkObject
{
public:
  static vtkKMeansDistanceFunctor* New();
  vtkTypeMacro(vtkKMeansDistanceFunctor, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  virtual vtkVariantArray* GetEmptyTuple(vtkIdType dimension);
 
  virtual void operator()(double&, vtkVariantArray*, vtkVariantArray*);
 
  virtual void PairwiseUpdate(vtkTable* clusterCenters, vtkIdType row, vtkVariantArray* data,
    vtkIdType dataCardinality, vtkIdType totalCardinality);
 
  virtual void PerturbElement(vtkTable*, vtkTable*, vtkIdType, vtkIdType, vtkIdType, double);
 
  virtual void* AllocateElementArray(vtkIdType size);
 
  virtual void DeallocateElementArray(void*);
 
  virtual vtkAbstractArray* CreateCoordinateArray();
 
  virtual void PackElements(vtkTable* curTable, void* vElements);
 
 
  virtual void UnPackElements(
    vtkTable* curTable, vtkTable* newTable, void* vLocalElements, void* vGlobalElements, int np);
  virtual void UnPackElements(
    vtkTable* curTable, void* vLocalElements, vtkIdType numRows, vtkIdType numCols);
 
  virtual int GetDataType();
 
protected:
  vtkKMeansDistanceFunctor();
  ~vtkKMeansDistanceFunctor() override;
 
  vtkVariantArray* EmptyTuple; // Used to quickly initialize Tuple for each datum
  vtkTable*
    CenterUpdates; // Used to hold online computation of next iteration's cluster center coords.
 
private:
  vtkKMeansDistanceFunctor(const vtkKMeansDistanceFunctor&) = delete;
  void operator=(const vtkKMeansDistanceFunctor&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif // vtkKMeansDistanceFunctor_h