Numerics/Statistics/itkNormalVariateGenerator.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkNormalVariateGenerator.h,v $
  Language:  C++
  Date:      $Date: 2009-03-04 15:24:04 $
  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 __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(); 
  virtual void PrintSelf(std::ostream& os, Indent indent) const;
    
  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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