vtkPCAAnalysisFilter.h

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

  Program:   Visualization Toolkit
  Module:    vtkPCAAnalysisFilter.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 vtkPCAAnalysisFilter_h
#define vtkPCAAnalysisFilter_h

#include "vtkFiltersHybridModule.h" // For export macro
#include "vtkMultiBlockDataSetAlgorithm.h"

class vtkFloatArray;
class vtkPointSet;

class VTKFILTERSHYBRID_EXPORT vtkPCAAnalysisFilter : public vtkMultiBlockDataSetAlgorithm
{
 public:
  vtkTypeMacro(vtkPCAAnalysisFilter,vtkMultiBlockDataSetAlgorithm);

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

  static vtkPCAAnalysisFilter *New();


  vtkGetObjectMacro(Evals, vtkFloatArray);

  void GetParameterisedShape(vtkFloatArray *b, vtkPointSet* shape);

  void GetShapeParameters(vtkPointSet *shape, vtkFloatArray *b, int bsize);

  int GetModesRequiredFor(double proportion);

protected:
  vtkPCAAnalysisFilter();
  ~vtkPCAAnalysisFilter() override;

  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *) override;

private:
  vtkPCAAnalysisFilter(const vtkPCAAnalysisFilter&) = delete;
  void operator=(const vtkPCAAnalysisFilter&) = delete;

  // Eigenvalues
  vtkFloatArray *Evals;

  // Matrix where each column is an eigenvector
  double **evecMat2;

  // The mean shape in a vector
  double *meanshape;
};

#endif