vtkThinPlateSplineTransform.h

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

  Program:   Visualization Toolkit
  Module:    vtkThinPlateSplineTransform.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 vtkThinPlateSplineTransform_h
#define vtkThinPlateSplineTransform_h

#include "vtkCommonTransformsModule.h" // For export macro
#include "vtkWarpTransform.h"

#define VTK_RBF_CUSTOM 0
#define VTK_RBF_R      1
#define VTK_RBF_R2LOGR 2

class VTKCOMMONTRANSFORMS_EXPORT vtkThinPlateSplineTransform : public vtkWarpTransform
{
public:
  vtkTypeMacro(vtkThinPlateSplineTransform,vtkWarpTransform);
  void PrintSelf(ostream& os, vtkIndent indent) override;
  static vtkThinPlateSplineTransform *New();


  vtkGetMacro(Sigma,double);
  vtkSetMacro(Sigma,double);


  void SetBasis(int basis);
  vtkGetMacro(Basis,int);
  void SetBasisToR() { this->SetBasis(VTK_RBF_R); };
  void SetBasisToR2LogR() { this->SetBasis(VTK_RBF_R2LOGR); };
  const char *GetBasisAsString();


  void SetBasisFunction(double (*U)(double r)) {
    if (this->BasisFunction == U) { return; }
    this->SetBasis(VTK_RBF_CUSTOM);
    this->BasisFunction = U;
    this->Modified(); };
  void SetBasisDerivative(double (*dUdr)(double r, double &dU)) {
    this->BasisDerivative = dUdr;
    this->Modified(); };


  void SetSourceLandmarks(vtkPoints *source);
  vtkGetObjectMacro(SourceLandmarks,vtkPoints);


  void SetTargetLandmarks(vtkPoints *target);
  vtkGetObjectMacro(TargetLandmarks,vtkPoints);

  vtkMTimeType GetMTime() override;

  vtkAbstractTransform *MakeTransform() override;

protected:
  vtkThinPlateSplineTransform();
  ~vtkThinPlateSplineTransform() override;

  void InternalUpdate() override;

  void InternalDeepCopy(vtkAbstractTransform *transform) override;

  void ForwardTransformPoint(const float in[3], float out[3]) override;
  void ForwardTransformPoint(const double in[3], double out[3]) override;

  void ForwardTransformDerivative(const float in[3], float out[3],
                                  float derivative[3][3]) override;
  void ForwardTransformDerivative(const double in[3], double out[3],
                                  double derivative[3][3]) override;

  double Sigma;
  vtkPoints *SourceLandmarks;
  vtkPoints *TargetLandmarks;

  // the radial basis function to use
  double (*BasisFunction)(double r);
  double (*BasisDerivative)(double r, double& dUdr);

  int Basis;

  int NumberOfPoints;
  double **MatrixW;
private:
  vtkThinPlateSplineTransform(const vtkThinPlateSplineTransform&) = delete;
  void operator=(const vtkThinPlateSplineTransform&) = delete;
};

#endif