geo/tcObserver.h

   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 #ifndef _tcObserver_h_
  21 #define _tcObserver_h_
  22
  23 /**
  24  * @file tcObserver.h
  25  * @brief Viewing information for an observer.
  26  */
  27
  28 #include "tcGeo.h"
  29 #include "tcGeoVector.h"
  30
  31 /// Viewing information for an observer.
  32 class tcObserver
  33 {
  34   public:
  35
  36     /*
  37      * Constructors + destructor
  38      */
  39
  40     /// Primary constructor.
  41     tcObserver();
  42
  43     /// Destructor.
  44     virtual ~tcObserver();
  45
  46     /*
  47      * Main interface
  48      */
  49
  50     /// Set up the OpenGL projection matrix for this observer.
  51     void setupProjection(double aspect) const;
  52
  53     /// Set up the OpenGL modelview matrix for this observer.
  54     void setupModelView() const;
  55
  56     /*
  57      * Mutators
  58      */
  59
  60     /// Adjust the focus directly.
  61     void setFocus(const tcGeo& focus, double altitude);
  62
  63     /// Make a local transformation of the focus.
  64     void moveFocusRelative(double dx, double dy);
  65
  66     /// Adjust the range exponentially.
  67     void adjustRange(double x);
  68
  69     /// Adjust the azimuth in radians.
  70     void adjustAzimuth(double daz);
  71
  72     /// Adjust the elevation in radians.
  73     void adjustElevation(double del);
  74
  75   private:
  76
  77     /*
  78      * Variables
  79      */
  80
  81     /// Geographical position of focus.
  82     tcGeo m_focus;
  83
  84     /// Altitude of focus.
  85     double m_focusAltitude;
  86
  87     /// Observation direction.
  88     tcGeoVector m_view;
  89
  90     /// Range of camera.
  91     double m_range;
  92 };
  93
  94 #endif
  95