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

  Program:   Visualization Toolkit
  Module:    vtkImageContinuousErode3D.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.

=========================================================================*/
// .NAME vtkImageContinuousErode3D - Erosion implemented as a minimum.
// .SECTION Description
// vtkImageContinuousErode3D replaces a pixel with the minimum over
// an ellipsoidal neighborhood.  If KernelSize of an axis is 1, no processing
// is done on that axis.


#ifndef __vtkImageContinuousErode3D_h
#define __vtkImageContinuousErode3D_h


#include "vtkImageSpatialAlgorithm.h"

class vtkImageEllipsoidSource;

class VTK_IMAGING_EXPORT vtkImageContinuousErode3D : public vtkImageSpatialAlgorithm
{
public:
  // Description:
  // Construct an instance of vtkImageContinuousErode3D filter.
  // By default zero values are eroded.
  static vtkImageContinuousErode3D *New();
  vtkTypeRevisionMacro(vtkImageContinuousErode3D,vtkImageSpatialAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);
  
  // Description:
  // This method sets the size of the neighborhood.  It also sets the 
  // default middle of the neighborhood and computes the elliptical foot print.
  void SetKernelSize(int size0, int size1, int size2);

  // Description:
  // If you want to erode by an arbitrary point scalar array, 
  // then set its name here.
  // By default this in NULL and the filter will use the active scalar array.
  vtkGetStringMacro(InputScalarsSelection);
  void SelectInputScalars(const char *fieldName) 
    {this->SetInputScalarsSelection(fieldName);}  
  
protected:
  vtkImageContinuousErode3D();
  ~vtkImageContinuousErode3D();

  vtkImageEllipsoidSource *Ellipse;
    
  void ThreadedRequestData(vtkInformation *request,
                           vtkInformationVector **inputVector,
                           vtkInformationVector *outputVector,
                           vtkImageData ***inData, vtkImageData **outData, 
                           int extent[6], int id);
  virtual int RequestData(vtkInformation *request,
                          vtkInformationVector **inputVector,
                          vtkInformationVector *outputVector);

private:
  vtkImageContinuousErode3D(const vtkImageContinuousErode3D&);  // Not implemented.
  void operator=(const vtkImageContinuousErode3D&);  // Not implemented.
};

#endif
