geo/tcRangeSpectrum.cpp

   1 /***************************************************************************
   2  *   This file is part of Tecorrec.                                        *
   3  *   Copyright 2008 James Hogan <james@albanarts.com>                      *
   4  *                                                                         *
   5  *   Tecorrec is free software: you can redistribute it and/or modify      *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation, either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   Tecorrec is distributed in the hope that it will be useful,           *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with Tecorrec.  If not, write to the Free Software Foundation,  *
  17  *   Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.   *
  18  ***************************************************************************/
  19
  20 /**
  21  * @file tcRangeSpectrum.h
  22  * @brief Frequency spectrum of a uniform value in a range.
  23  */
  24
  25 #include "tcRangeSpectrum.h"
  26
  27 #include <QtGlobal>
  28
  29 /*
  30  * Constructors + destructor
  31  */
  32
  33 /// Default constructor.
  34 tcRangeSpectrum::tcRangeSpectrum(float max, float x, float y)
  35 : tcSpectrum()
  36 , m_max(max)
  37 , m_x(x)
  38 , m_y(y)
  39 {
  40   Q_ASSERT(y >= x);
  41 }
  42
  43 /// Destructor.
  44 tcRangeSpectrum::~tcRangeSpectrum()
  45 {
  46 }
  47
  48 /*
  49  * Virtual interface
  50  */
  51
  52 float tcRangeSpectrum::mean() const
  53 {
  54   return (m_x + m_y) / 2.0f;
  55 }
  56
  57 float tcRangeSpectrum::integrate() const
  58 {
  59   return (m_y - m_x) * m_max;
  60 }
  61
  62 float tcRangeSpectrum::integrate(float x) const
  63 {
  64   if (x <= m_x)
  65   {
  66     return 0.0f;
  67   }
  68   else
  69   {
  70     if (x >= m_y)
  71     {
  72       x = m_y;
  73     }
  74     return (x - m_x) * m_max;
  75   }
  76 }