itkMembershipFunctionBase.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkMembershipFunctionBase.h,v $
  Language:  C++
  Date:      $Date: 2006/02/24 16:57:21 $
  Version:   $Revision: 1.8 $

  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 __itkMembershipFunctionBase_h
#define __itkMembershipFunctionBase_h

#include "itkFunctionBase.h"
#include "itkMeasurementVectorTraits.h"

namespace itk{ 
namespace Statistics{

template< class TVector >
class ITK_EXPORT MembershipFunctionBase :
    public FunctionBase< TVector, double >
{
public:
  typedef MembershipFunctionBase Self;
  typedef FunctionBase< TVector, double > Superclass ;
  typedef SmartPointer< Self > Pointer ;
  typedef SmartPointer<const Self> ConstPointer;

  itkTypeMacro(MembershipFunctionBase, FunctionBase);

  typedef unsigned int  MeasurementVectorSizeType;

  virtual double Evaluate(const TVector &x) const = 0 ;

  itkSetMacro( MeasurementVectorSize, MeasurementVectorSizeType );
  itkGetConstMacro( MeasurementVectorSize, MeasurementVectorSizeType ); 

protected:
  MembershipFunctionBase() : m_MeasurementVectorSize( 
      MeasurementVectorTraits::GetLength( TVector() ) ) {}
  virtual ~MembershipFunctionBase(void) {}

  void PrintSelf(std::ostream& os, Indent indent) const
    { 
    Superclass::PrintSelf(os,indent) ; 
    os << indent << "Length of measurement vectors: " 
                << m_MeasurementVectorSize << std::endl;
    }

  MeasurementVectorSizeType m_MeasurementVectorSize;
} ; // end of class

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

#endif

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