vtkKMeansDistanceFunctor.h

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#ifndef vtkKMeansDistanceFunctor_h
#define vtkKMeansDistanceFunctor_h

#include "vtkFiltersStatisticsModule.h" // For export macro
#include "vtkObject.h"

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;
};

#endif // vtkKMeansDistanceFunctor_h