SimGear: SGGeodesy.hxx Source File

00001 // Copyright (C) 2006  Mathias Froehlich - Mathias.Froehlich@web.de
00002 //
00003 // This library is free software; you can redistribute it and/or
00004 // modify it under the terms of the GNU Library General Public
00005 // License as published by the Free Software Foundation; either
00006 // version 2 of the License, or (at your option) any later version.
00007 //
00008 // This library is distributed in the hope that it will be useful,
00009 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00010 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00011 // Library General Public License for more details.
00012 //
00013 // You should have received a copy of the GNU General Public License
00014 // along with this program; if not, write to the Free Software
00015 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
00016 //
00017 
00018 #ifndef SGGeodesy_H
00019 #define SGGeodesy_H
00020 
00021 class SGGeodesy {
00022 public:
00023   // Hard numbers from the WGS84 standard.
00024   static const double EQURAD;
00025   static const double iFLATTENING;
00026   static const double SQUASH;
00027   static const double STRETCH;
00028   static const double POLRAD;
00029 
00032   static void SGCartToGeod(const SGVec3<double>& cart, SGGeod& geod);
00033   
00036   static void SGGeodToCart(const SGGeod& geod, SGVec3<double>& cart);
00037   
00039   static double SGGeodToSeaLevelRadius(const SGGeod& geod);
00040 
00043   static void SGCartToGeoc(const SGVec3<double>& cart, SGGeoc& geoc);
00044   
00047   static void SGGeocToCart(const SGGeoc& geoc, SGVec3<double>& cart);
00048 
00049   // Geodetic course/distance computation
00050   static bool direct(const SGGeod& p1, double course1,
00051                      double distance, SGGeod& p2, double& course2);
00052 
00053   static bool inverse(const SGGeod& p1, const SGGeod& p2, double& course1,
00054                       double& course2, double& distance);
00055 
00056   static double courseDeg(const SGGeod& from, const SGGeod& to);
00057   static double distanceM(const SGGeod& from, const SGGeod& to);
00058   static double distanceNm(const SGGeod& from, const SGGeod& to);
00059     
00060   // Geocentric course/distance computation
00061   static void advanceRadM(const SGGeoc& geoc, double course, double distance,
00062                           SGGeoc& result);
00063   static double courseRad(const SGGeoc& from, const SGGeoc& to);
00064   static double distanceRad(const SGGeoc& from, const SGGeoc& to);
00065   static double distanceM(const SGGeoc& from, const SGGeoc& to);
00066 };
00067 
00068 #endif