1 // polar.hxx -- routines to deal with polar math and transformations
3 // Written by Curtis Olson, started June 1997.
5 // Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 // (Log is kept at end of this file)
30 # error This library requires C++
34 #include <Include/fg_constants.h>
35 #include <Math/point3d.hxx>
38 // Convert a polar coordinate to a cartesian coordinate. Lon and Lat
39 // must be specified in radians. The FG convention is for distances
40 // to be specified in meters
41 Point3D fgPolarToCart3d(const Point3D& p);
44 // Convert a cartesian coordinate to polar coordinates (lon/lat
45 // specified in radians. Distances are specified in meters.
46 Point3D fgCartToPolar3d(const Point3D& cp);
49 // Find the Altitude above the Ellipsoid (WGS84) given the Earth
50 // Centered Cartesian coordinate vector Distances are specified in
52 double fgGeodAltFromCart(const Point3D& cp);
59 // Revision 1.4 1998/10/16 19:30:07 curt
60 // C++-ified the comments.
62 // Revision 1.3 1998/10/16 00:50:30 curt
63 // Added point3d.hxx to replace cheezy fgPoint3d struct.
65 // Revision 1.2 1998/08/24 20:04:12 curt
66 // Various "inline" code optimizations contributed by Norman Vine.
68 // Revision 1.1 1998/07/08 14:40:09 curt
69 // polar3d.[ch] renamed to polar3d.[ch]xx, vector.[ch] renamed to vector.[ch]xx
70 // Updated fg_geodesy comments to reflect that routines expect and produce
73 // Revision 1.1 1998/05/02 01:50:11 curt
74 // polar.[ch] renamed to polar3d.[ch]
76 // Revision 1.9 1998/04/25 22:06:23 curt
77 // Edited cvs log messages in source files ... bad bad bad!
79 // Revision 1.8 1998/04/21 17:03:50 curt
80 // Prepairing for C++ integration.
82 // Revision 1.7 1998/01/27 00:48:00 curt
83 // Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
84 // system and commandline/config file processing code.
86 // Revision 1.6 1998/01/22 02:59:39 curt
87 // Changed #ifdef FILE_H to #ifdef _FILE_H
89 // Revision 1.5 1998/01/19 19:27:13 curt
90 // Merged in make system changes from Bob Kuehne <rpk@sgi.com>
91 // This should simplify things tremendously.
93 // Revision 1.4 1997/12/15 23:54:55 curt
94 // Add xgl wrappers for debugging.
95 // Generate terrain normals on the fly.
97 // Revision 1.3 1997/07/31 22:52:28 curt
98 // Working on redoing internal coordinate systems & scenery transformations.
100 // Revision 1.2 1997/07/23 21:52:21 curt
101 // Put comments around the text after an #endif for increased portability.
103 // Revision 1.1 1997/07/07 21:02:37 curt