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[simgear.git] / simgear / math / SGGeodesy.hxx

diff --git a/simgear/math/SGGeodesy.hxx b/simgear/math/SGGeodesy.hxx
index 8f44504be63fec643d589d2c41600e5ee1f7b99b..cce38199b6b252de56afde984f67c3cbaf6c988d 100644 (file)
--- a/simgear/math/SGGeodesy.hxx
+++ b/simgear/math/SGGeodesy.hxx
@@ -1,12 +1,23 @@
+// Copyright (C) 2006  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
 #ifndef SGGeodesy_H
 #define SGGeodesy_H
 
-class SGGeoc;
-class SGGeod;
-
-template<typename T>
-class SGVec3;
-
 class SGGeodesy {
 public:
   // Hard numbers from the WGS84 standard.
@@ -34,6 +45,39 @@ public:
   /// Takes a geocentric coordinate data and returns the cartesian
   /// coordinates.
   static void SGGeocToCart(const SGGeoc& geoc, SGVec3<double>& cart);
+
+  // Geodetic course/distance computation
+  static bool direct(const SGGeod& p1, double course1,
+                     double distance, SGGeod& p2, double& course2);
+
+  /// overloaded version of above, returns new value directly, throws
+  /// an sg_exception on failure.
+  static SGGeod direct(const SGGeod& p1, double course1,
+                     double distance);
+
+  static bool inverse(const SGGeod& p1, const SGGeod& p2, double& course1,
+                      double& course2, double& distance);
+
+  static double courseDeg(const SGGeod& from, const SGGeod& to);
+  static double distanceM(const SGGeod& from, const SGGeod& to);
+  static double distanceNm(const SGGeod& from, const SGGeod& to);
+    
+  // Geocentric course/distance computation
+  static void advanceRadM(const SGGeoc& geoc, double course, double distance,
+                          SGGeoc& result);
+  static double courseRad(const SGGeoc& from, const SGGeoc& to);
+  static double distanceRad(const SGGeoc& from, const SGGeoc& to);
+  static double distanceM(const SGGeoc& from, const SGGeoc& to);
+  
+  /**
+   * compute the intersection of two (true) radials (in degrees), or return false
+   * if no intersection culd be computed.
+   */
+  static bool radialIntersection(const SGGeoc& a, double aRadial, 
+    const SGGeoc& b, double bRadial, SGGeoc& result);
+    
+  static bool radialIntersection(const SGGeod& a, double aRadial, 
+    const SGGeod& b, double bRadial, SGGeod& result);
 };
 
 #endif