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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkEllipseBoundaryToImageFilter.h,v $
  Language:  C++
  Date:      $$
  Version:   $Revision: 1.00 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/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 notices for more information.

=========================================================================*/
#ifndef __itkEllipseBoundaryToImageFilter_h
#define __itkEllipseBoundaryToImageFilter_h

#include "itkSpatialObjectToImageFilter.h"
#include "itkPointSet.h"
#include "itkPointSetToImageFilter.h"
#include "itkEllipseSpatialObject.h"

namespace itk
{
  
/** \class EllipseBoundaryToImageFilter
 * \brief filter that takes a EllipseBoundary 
 *  as input and produce an image as output, which shows the boundary of the ellipse.
 *  This filter is more efficient than SpatialObjectToImage because it doesn't traverse
 *  the whole image.
 *  By default, if the user does not specify the size of the output image,
 *  the maximum size of the object's bounding box is used. 
 *  The spacing of the image is given by the spacing of the input 
 *  EllipseSpatial object.
 */
template < class TInputSpatialObject , class TOutputImage >
class ITK_EXPORT EllipseBoundaryToImageFilter
: public SpatialObjectToImageFilter <TInputSpatialObject, TOutputImage>
{
public:
  /** Standard class typedefs. */
  typedef EllipseBoundaryToImageFilter  Self;
  typedef SpatialObjectToImageFilter
    <TInputSpatialObject, TOutputImage> Superclass;
  typedef SmartPointer<Self>  Pointer;
  typedef SmartPointer<const Self>  ConstPointer;
  typedef typename TOutputImage::SizeType   SizeType;
  typedef typename TOutputImage::PointType   PointType;
  typedef TOutputImage  OutputImageType;
  typedef typename OutputImageType::Pointer OutputImagePointer;
  typedef typename OutputImageType::ValueType  ValueType;
  typedef typename OutputImageType::SpacingType SpacingType;

  /** Method for creation through the object factory. */
  itkNewMacro(Self);
  
  /** Run-time type information (and related methods). */
  itkTypeMacro(EllipseBoundaryToImageFilter, SpatialObjectToImage );

  /** Superclass typedefs. */
  typedef typename Superclass::OutputImageRegionType OutputImageRegionType;

  /** Some convenient typedefs. */
  typedef TInputSpatialObject InputSpatialObjectType;
  typedef typename InputSpatialObjectType::Pointer        InputSpatialObjectPointer;
  typedef typename InputSpatialObjectType::ConstPointer   InputSpatialObjectConstPointer;
  typedef typename InputSpatialObjectType::ChildrenListType   ChildrenListType;
  typedef typename TOutputImage::PixelType   PixelType  ;

  /** ImageDimension constants */
  itkStaticConstMacro(ObjectDimension, unsigned int,
                      InputSpatialObjectType::ObjectDimension);
  itkStaticConstMacro(OutputImageDimension, unsigned int,
                      TOutputImage::ImageDimension);


protected:
  typedef PointSet< double , ObjectDimension > PointSetType;
  typedef PointSetToImageFilter<PointSetType,OutputImageType> 
    PointSetFilterType;
  typedef typename InputSpatialObjectType::TransformType
    TransformType ;
  EllipseBoundaryToImageFilter();
  ~EllipseBoundaryToImageFilter();

  virtual void GenerateOutputInformation(){}; // do nothing
  virtual void GenerateData();

  typename PointSetFilterType::Pointer            m_PointSetFilter ; 

private:
  EllipseBoundaryToImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented


};

} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkEllipseBoundaryToImageFilter.txx"
#endif

#endif