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

  Program:   Visualization Toolkit
  Module:    vtkImageContinuousErode3D.h
  Language:  C++
  Date:      $Date$
  Version:   $Revision$
  Thanks:    Thanks to C. Charles Law who developed this class.

Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================*/
// .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 "vtkImageSpatialFilter.h"

class vtkImageEllipsoidSource;

class VTK_IMAGING_EXPORT vtkImageContinuousErode3D : public vtkImageSpatialFilter
{
public:
  // Description:
  // Construct an instance of vtkImageContinuousErode3D filter.
  // By default zero values are eroded.
  static vtkImageContinuousErode3D *New();
  vtkTypeMacro(vtkImageContinuousErode3D,vtkImageSpatialFilter);
  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);

  
protected:
  vtkImageContinuousErode3D();
  ~vtkImageContinuousErode3D();

  vtkImageEllipsoidSource *Ellipse;
    
  void ThreadedExecute(vtkImageData *inData, vtkImageData *outData, 
                       int extent[6], int id);
private:
  vtkImageContinuousErode3D(const vtkImageContinuousErode3D&);  // Not implemented.
  void operator=(const vtkImageContinuousErode3D&);  // Not implemented.
};

#endif



