qtFloatMath.h

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/******************************************************************************
** Copyright (c) 1992-2010 VT MAK
** All rights reserved.
******************************************************************************/


#ifndef qtFloatMath_H_
#define qtFloatMath_H_

#include <lgrGui/lgrGui.h>

#include <QtCore/QPoint>
#include <QtCore/QRect>
#include <math.h>

#include <limits.h>
#define DT_ROUND(x) (((x) < LONG_MIN-0.5 || (x) > LONG_MAX+0.5) ?  0 : ((x)>=0?(int)((x)+0.5):(int)((x)-0.5)))

namespace MAKLogger
{
   class DT_DLL_LGRGUI DtValueSmoother
   {
   public:

      DtValueSmoother(int valuesToBuffer,double init)
      {
         myValues = new double[valuesToBuffer];
         myBufferSize = valuesToBuffer;
         for(int i = 0;i < myBufferSize;++i)
         {
            myValues[i] = init;
         }

      }

      ~DtValueSmoother()
      {
         delete[] myValues;
      }

      void addValue(double value)
      {
         for(int i = 1;i < myBufferSize;++i)
         {
            myValues[i-1] = myValues[i];
         }
         myValues[myBufferSize-1] = value;
      }

      double getSmoothedValue()
      {
         double deltaD = 0.0;
         for(int i = 1;i < myBufferSize;++i)
         {
            deltaD += myValues[i] - myValues[i-1];
         }
         deltaD /= (myBufferSize-1);

         double newValue = 0.0;
         for(int j = 0;j < myBufferSize;++j)
         {
            newValue += myValues[j] + ((myBufferSize - j) * deltaD);
         }
         newValue /= myBufferSize;
         return newValue;
      }

   protected:
      double* myValues;
      int myBufferSize;
   };



}

#endif