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