vtkGeneralizedKernel.h

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

  Program:   Visualization Toolkit
  Module:    vtkGeneralizedKernel.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 vtkGeneralizedKernel_h
#define vtkGeneralizedKernel_h

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


class VTKFILTERSPOINTS_EXPORT vtkGeneralizedKernel : public vtkInterpolationKernel
{
public:

  vtkTypeMacro(vtkGeneralizedKernel, vtkInterpolationKernel)
  void PrintSelf(ostream& os, vtkIndent indent) override;

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

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

  vtkIdType ComputeWeights(double x[3], vtkIdList *pIds, vtkDoubleArray *weights) override
  {
    return this->ComputeWeights(x,pIds,nullptr,weights);
  }

  enum KernelStyle
  {
    RADIUS=0,
    N_CLOSEST=1
  };


  vtkSetMacro(KernelFootprint,int);
  vtkGetMacro(KernelFootprint,int);
  void SetKernelFootprintToRadius()
    { this->SetKernelFootprint(RADIUS); }
  void SetKernelFootprintToNClosest()
    { this->SetKernelFootprint(N_CLOSEST); }


  vtkSetClampMacro(Radius,double,0.0,VTK_FLOAT_MAX);
  vtkGetMacro(Radius,double);


  vtkSetClampMacro(NumberOfPoints,int,1,VTK_INT_MAX);
  vtkGetMacro(NumberOfPoints,int);


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

protected:
  vtkGeneralizedKernel();
  ~vtkGeneralizedKernel() override;

  int KernelFootprint;
  double Radius;
  int NumberOfPoints;
  bool NormalizeWeights;

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

#endif