itkRadialBasisFunctionBase.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkRadialBasisFunctionBase.h,v $
  Language:  C++
  Date:      $Date: 2009-01-28 21:04:59 $
  Version:   $Revision: 1.3 $

  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 __itkRadialBasisFunctionBase_h
#define __itkRadialBasisFunctionBase_h

#include "itkFunctionBase.h"
#include "itkArray.h"

namespace itk
{
namespace Statistics
{

template<class ScalarType>
class RadialBasisFunctionBase : public FunctionBase<ScalarType,ScalarType>
{
public:

  typedef RadialBasisFunctionBase             Self;
  typedef FunctionBase<ScalarType,ScalarType> Superclass;
  typedef SmartPointer<Self>                  Pointer;
  typedef SmartPointer<const Self>            ConstPointer;

  itkTypeMacro(RadialBasisFunctionBase, FunctionBase);

  typedef Array<ScalarType> ArrayType;

  virtual ScalarType Evaluate(const ScalarType& input) const=0;

  virtual ScalarType EvaluateDerivative(const ScalarType& dist, const ArrayType& input,
                                                    char mode,int element_id=0) const=0;

  itkSetMacro(Radius,ScalarType);
  itkGetConstMacro( Radius, ScalarType );

  itkSetMacro(Center,ArrayType);
  itkGetConstMacro(Center, ArrayType );

protected:

  RadialBasisFunctionBase()
    {
    m_Radius = 0;
    }
  ~RadialBasisFunctionBase() {};

  virtual void PrintSelf( std::ostream& os, Indent indent ) const
    {
    os << indent << "RadialBasisFunctionBase(" << this << ")" << std::endl;
    Superclass::PrintSelf( os, indent );
    }

private:

  ArrayType  m_Center;
  ScalarType m_Radius;

  RadialBasisFunctionBase(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
};

} // end namespace Statistics
} // end namespace itk

#endif

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