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

  Program:   Visualization Toolkit
  Module:    vtkImageEuclideanToPolar.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.

=========================================================================*/
/**
 * @class   vtkImageEuclideanToPolar
 * @brief   Converts 2D Euclidean coordinates to polar.
 *
 * For each pixel with vector components x,y, this filter outputs
 * theta in component0, and radius in component1.
 */

#ifndef vtkImageEuclideanToPolar_h
#define vtkImageEuclideanToPolar_h

#include "vtkImagingGeneralModule.h" // For export macro
#include "vtkThreadedImageAlgorithm.h"

class VTKIMAGINGGENERAL_EXPORT vtkImageEuclideanToPolar : public vtkThreadedImageAlgorithm
{
public:
  static vtkImageEuclideanToPolar* New();
  vtkTypeMacro(vtkImageEuclideanToPolar, vtkThreadedImageAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  ///@{
  /**
   * Theta is an angle. Maximum specifies when it maps back to 0.
   * ThetaMaximum defaults to 255 instead of 2PI, because unsigned char
   * is expected as input. The output type must be the same as input type.
   */
  vtkSetMacro(ThetaMaximum, double);
  vtkGetMacro(ThetaMaximum, double);
  ///@}

protected:
  vtkImageEuclideanToPolar();
  ~vtkImageEuclideanToPolar() override = default;

  double ThetaMaximum;

  void ThreadedExecute(vtkImageData* inData, vtkImageData* outData, int ext[6], int id) override;

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

#endif
