/usr/include/simgear/math/SGGeodesy.hxx is in libsimgear-dev 3.0.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// 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 SGGeodesy {
public:
// Hard numbers from the WGS84 standard.
static const double EQURAD;
static const double iFLATTENING;
static const double SQUASH;
static const double STRETCH;
static const double POLRAD;
/// Takes a cartesian coordinate data and returns the geodetic
/// coordinates.
static void SGCartToGeod(const SGVec3<double>& cart, SGGeod& geod);
/// Takes a geodetic coordinate data and returns the cartesian
/// coordinates.
static void SGGeodToCart(const SGGeod& geod, SGVec3<double>& cart);
/// Takes a geodetic coordinate data and returns the sea level radius.
static double SGGeodToSeaLevelRadius(const SGGeod& geod);
/// Takes a cartesian coordinate data and returns the geocentric
/// coordinates.
static void SGCartToGeoc(const SGVec3<double>& cart, SGGeoc& geoc);
/// 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
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