mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-25 09:18:54 -05:00
134 lines
4.1 KiB
C++
134 lines
4.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2020 Jon Beniston, M7RCE <jon@beniston.com> //
|
|
// //
|
|
// This program is free software; you can redistribute it and/or modify //
|
|
// it under the terms of the GNU General Public License as published by //
|
|
// the Free Software Foundation as version 3 of the License, or //
|
|
// (at your option) any later version. //
|
|
// //
|
|
// This program 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 General Public License V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef INCLUDE_AZ_EL_H
|
|
#define INCLUDE_AZ_EL_H
|
|
|
|
#include "export.h"
|
|
|
|
// Spherical coordinate
|
|
struct SDRBASE_API AzElSpherical
|
|
{
|
|
double m_latitude; // Degrees
|
|
double m_longitude; // Degrees
|
|
double m_altitude; // Metres
|
|
};
|
|
|
|
// Cartesian coordinate
|
|
struct SDRBASE_API AzElCartesian
|
|
{
|
|
double m_x; // Metres
|
|
double m_y; // Metres
|
|
double m_z; // Metres
|
|
};
|
|
|
|
struct SDRBASE_API AzElPoint
|
|
{
|
|
AzElSpherical m_spherical; // Spherical coordinates
|
|
AzElCartesian m_cart; // Cartesian coordinates
|
|
AzElCartesian m_norm; // Normal vector on surface of sphere
|
|
double m_radius; // Radius from centre of sphere to the point
|
|
};
|
|
|
|
|
|
// Class to calculate azimuth, elevation and distance between two points specified
|
|
// by latitude, longitude and altitude
|
|
// See: https://doncross.net/geocalc
|
|
class SDRBASE_API AzEl
|
|
{
|
|
public:
|
|
// Location is the point we are looking from
|
|
void setLocation(double latitude, double longitude, double altitude)
|
|
{
|
|
m_location.m_spherical.m_latitude = latitude;
|
|
m_location.m_spherical.m_longitude = longitude;
|
|
m_location.m_spherical.m_altitude = altitude;
|
|
sphericalToCartesian(m_location);
|
|
}
|
|
|
|
// Target is the point we are looking at
|
|
void setTarget(double latiude, double longitude, double altitude)
|
|
{
|
|
m_target.m_spherical.m_latitude = latiude;
|
|
m_target.m_spherical.m_longitude = longitude;
|
|
m_target.m_spherical.m_altitude = altitude;
|
|
sphericalToCartesian(m_target);
|
|
}
|
|
|
|
AzElSpherical getLocationSpherical()
|
|
{
|
|
return m_location.m_spherical;
|
|
}
|
|
|
|
AzElCartesian getLocationCartesian()
|
|
{
|
|
return m_location.m_cart;
|
|
}
|
|
|
|
AzElSpherical getTargetSpherical()
|
|
{
|
|
return m_target.m_spherical;
|
|
}
|
|
|
|
AzElCartesian getTargetCartesian()
|
|
{
|
|
return m_target.m_cart;
|
|
}
|
|
|
|
void calculate()
|
|
{
|
|
m_distance = cartDistance(m_location, m_target);
|
|
calcAzimuth();
|
|
calcElevation();
|
|
}
|
|
|
|
double getDistance()
|
|
{
|
|
return m_distance;
|
|
}
|
|
|
|
double getAzimuth()
|
|
{
|
|
return m_azimuth;
|
|
}
|
|
|
|
double getElevation()
|
|
{
|
|
return m_elevation;
|
|
}
|
|
|
|
private:
|
|
|
|
double cartDistance(const AzElPoint& a, const AzElPoint& b);
|
|
bool normVectorDiff(const AzElCartesian& a, const AzElCartesian& b, AzElCartesian& n);
|
|
double geocentricLatitude(double latRad) const;
|
|
double earthRadiusInMetres(double geodeticLatRad) const;
|
|
void sphericalToCartesian(AzElPoint& point);
|
|
void calcAzimuth();
|
|
void calcElevation();
|
|
|
|
AzElPoint m_location;
|
|
AzElPoint m_target;
|
|
|
|
double m_azimuth;
|
|
double m_elevation;
|
|
double m_distance;
|
|
|
|
};
|
|
|
|
#endif
|