ExportAlignLog.cpp

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/******************************************************************************************************
 * (C) 2014 markummitchell@github.com. This file is part of Engauge Digitizer, which is released      *
 * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
 * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission.     *
 ******************************************************************************************************/
 
#include "ExportAlignLinear.h"
#include "ExportAlignLog.h"
#include <qmath.h>
 
ExportAlignLog::ExportAlignLog(double xMin,
                               double xMax)
{
  // Convert log numbers to linear numbers
  double xMinLog = log10 (xMin);
  double xMaxLog = log10 (xMax);
 
  ExportAlignLinear alignLinear (xMinLog,
                                 xMaxLog);
 
  // Convert result back to log numbers
  m_firstSimplestNumber = qPow (10.0, alignLinear.firstSimplestNumber ());
}
 
double ExportAlignLog::firstSimplestNumber () const
{
  return m_firstSimplestNumber;
}
 
double ExportAlignLog::log10 (double in) const
{
  return qLn (in) / qLn (10.0);
}