vtkInterpolationKernel.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkInterpolationKernel.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.

=========================================================================*/
#ifndef vtkInterpolationKernel_h
#define vtkInterpolationKernel_h

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

class vtkAbstractPointLocator;
class vtkIdList;
class vtkDoubleArray;
class vtkDataSet;
class vtkPointData;


class VTKFILTERSPOINTS_EXPORT vtkInterpolationKernel : public vtkObject
{
public:

  vtkAbstractTypeMacro(vtkInterpolationKernel, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  virtual void Initialize(vtkAbstractPointLocator *loc, vtkDataSet *ds,
                          vtkPointData *pd);


  vtkSetMacro(RequiresInitialization, bool);
  vtkGetMacro(RequiresInitialization, bool);
  vtkBooleanMacro(RequiresInitialization, bool);

  virtual vtkIdType ComputeBasis(double x[3], vtkIdList *pIds, vtkIdType ptId=0) = 0;

  virtual vtkIdType ComputeWeights(double x[3], vtkIdList *pIds,
                                   vtkDoubleArray *weights) = 0;

protected:
  vtkInterpolationKernel();
  ~vtkInterpolationKernel() override;

  bool RequiresInitialization;
  vtkAbstractPointLocator *Locator;
  vtkDataSet *DataSet;
  vtkPointData *PointData;

  // Just clear out the data. Can be overloaded by subclasses as necessary.
  virtual void FreeStructures();

private:
  vtkInterpolationKernel(const vtkInterpolationKernel&) = delete;
  void operator=(const vtkInterpolationKernel&) = delete;
};

#endif