itkNormalVariateGenerator.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkNormalVariateGenerator.h,v $
  Language:  C++
  Date:      $Date: 2002/08/26 14:18:37 $
  Version:   $Revision: 1.6 $

  Copyright (c) 2002 Insight 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 __itkNormalVariateGenerator_h
#define __itkNormalVariateGenerator_h

#include "itkObjectFactory.h"
#include "itkRandomVariateGeneratorBase.h"

namespace itk {
namespace Statistics {

class ITK_EXPORT NormalVariateGenerator : 
    public RandomVariateGeneratorBase
{
public:
  typedef NormalVariateGenerator Self ;
  typedef RandomVariateGeneratorBase Superclass;
  typedef SmartPointer<Self>   Pointer;
  typedef SmartPointer<const Self>  ConstPointer;

  itkTypeMacro(NormalVariateGenerator, 
               RandomVariateGeneratorBase );
 
  itkNewMacro(Self);
    
  void Initialize(int randomSeed) ;

  double GetVariate() ;
    
protected:
  NormalVariateGenerator() ;
  virtual ~NormalVariateGenerator() ; 
    
  double FastNorm (void) ;
    
private:
  double Scale ;
  double Rscale ;
  double Rcons ;
  int ELEN ;
  int LEN ;
  int LMASK ;
  int TLEN ;
    
  int gaussfaze, *gausssave;
  double GScale;
    
  int* vec1 ;
  int nslew;
  int irs, lseed;
  double chic1, chic2, actualRSD;
} ;  // end of class
  
} // end of namespace Statistics
} // end of namespace itk
#endif

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