itkGaussianSpatialFunction.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkGaussianSpatialFunction.h,v $
  Language:  C++
  Date:      $Date: 2008-10-17 01:08:45 $
  Version:   $Revision: 1.9 $

  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 __itkGaussianSpatialFunction_h
#define __itkGaussianSpatialFunction_h

#include "itkSpatialFunction.h"
#include "itkFixedArray.h"
#include "itkPoint.h"

namespace itk
{

template <typename TOutput=double, 
          unsigned int VImageDimension=3,
          typename TInput=Point<double, VImageDimension> >
class ITK_EXPORT GaussianSpatialFunction 
: public SpatialFunction<TOutput, VImageDimension, TInput>
{
public:
  typedef GaussianSpatialFunction                                 Self;
  typedef SpatialFunction<TOutput, VImageDimension, TInput>       Superclass;
  typedef SmartPointer<Self>                                      Pointer;
  typedef SmartPointer<const Self>                                ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(GaussianSpatialFunction, SpatialFunction);

  typedef typename Superclass::InputType InputType;

  typedef typename Superclass::OutputType OutputType;

  typedef FixedArray<double, VImageDimension> ArrayType;

  OutputType Evaluate(const TInput& position) const;

  itkSetMacro(Scale, double);
  itkGetMacro(Scale, double);
  itkSetMacro(Normalized, bool);
  itkGetMacro(Normalized, bool);
  itkSetMacro(Sigma, ArrayType);
  itkGetMacro(Sigma, ArrayType);
  itkSetMacro(Mean, ArrayType);
  itkGetMacro(Mean, ArrayType);

protected:
  GaussianSpatialFunction();
  virtual ~GaussianSpatialFunction();
  void PrintSelf(std::ostream& os, Indent indent) const;

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

  ArrayType m_Sigma;

  ArrayType m_Mean;

  double m_Scale;

  bool m_Normalized;

};

} // end namespace itk


// Define instantiation macro for this template.
#define ITK_TEMPLATE_GaussianSpatialFunction(_, EXPORT, x, y) namespace itk { \
  _(3(class EXPORT GaussianSpatialFunction< ITK_TEMPLATE_3 x >)) \
  namespace Templates { typedef GaussianSpatialFunction< ITK_TEMPLATE_3 x >\
                                                 GaussianSpatialFunction##y; } \
  }

#if ITK_TEMPLATE_EXPLICIT
# include "Templates/itkGaussianSpatialFunction+-.h"
#endif

#if ITK_TEMPLATE_TXX
# include "itkGaussianSpatialFunction.txx"
#endif

#endif