averager.h

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/*******************************************************************************
** Copyright (c) 1999-2000 MaK Technologies, Inc.
** All rights reserved.
*******************************************************************************/
/*******************************************************************************
** $RCSfile: averager.h,v $ $Revision: 1.10 $ $State: Exp $
*******************************************************************************/
#ifndef averager_H_
#define averager_H_


#include <vlutil/vlMachineTypes.h>
#include <vector>

#include "vrfutil/vrfutilDefines.h"
class DT_DLL_vrfutil DtAverager
{
public:
   DtAverager();

   DtAverager(unsigned int maxPopulation);

   DtAverager(const DtAverager& orig);

   DtAverager& operator=(const DtAverager& orig);

   virtual ~DtAverager();

   virtual double sampleMean() const;

   virtual double sampleMedian() const;

   virtual double sampleStandardDeviation() const;

   virtual double sampleMinimum() const;

   virtual double sampleMaximum() const;

   virtual void addSample(double sample);

   virtual double lastSample() const;

   virtual unsigned int maxPopulationSize() const;
   
   virtual void setMaxPopulationSize(unsigned int maxPopulation);

   virtual void invalidatePopulation();

   virtual std::vector<double>& samples();
   virtual const std::vector<double>& samples() const;

   virtual unsigned int currentSampleIndex() const;

   virtual unsigned int currentPopulationSize() const;

   virtual void adjustSample(double frameTime);

protected:
   virtual void invalidateStatistics();
   
   virtual void validateStatistics();

   void resetStatistics();

private:
   
   mutable double mySampleMean;
   mutable bool mySampleMeanValid;

   mutable double mySampleMedian;
   mutable bool mySampleMedianValid;

   mutable double mySampleStandardDeviation;
   mutable bool mySampleStandardDeviationValid;

   mutable double mySampleMaximum;
   mutable bool mySampleMaximumValid;

   mutable double mySampleMinimum;
   mutable bool mySampleMinimumValid;

   unsigned int myCurrentPopulationSize;
   unsigned int myCurrentSampleIndex;

   mutable std::vector<double> mySamples;
   mutable std::vector<double> mySortedSamples;
};

#endif