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GPXSee/src/coordinates.cpp

38 lines
947 B
C++

#include "rd.h"
#include "wgs84.h"
#include "coordinates.h"
qreal Coordinates::distanceTo(const Coordinates &c) const
{
qreal dLat = deg2rad(c.lat() - _lat);
qreal dLon = deg2rad(c.lon() - _lon);
qreal a = pow(sin(dLat / 2.0), 2.0)
+ cos(deg2rad(_lat)) * cos(deg2rad(c.lat())) * pow(sin(dLon / 2.0), 2.0);
return (WGS84_RADIUS * (2.0 * atan2(sqrt(a), sqrt(1.0 - a))));
}
QPointF Coordinates::toMercator() const
{
return QPointF(_lon, rad2deg(log(tan(M_PI/4.0 + deg2rad(_lat)/2.0))));
}
Coordinates Coordinates::fromMercator(const QPointF &m)
{
return Coordinates(m.x(), rad2deg(2 * atan(exp(deg2rad(m.y()))) - M_PI/2));
}
bool operator==(const Coordinates &c1, const Coordinates &c2)
{
return (c1.lat() == c2.lat() && c1.lon() == c2.lon());
}
QDebug operator<<(QDebug dbg, const Coordinates &coordinates)
{
dbg.nospace() << "Coordinates(" << coordinates.lon() << ", "
<< coordinates.lat() << ")";
return dbg.maybeSpace();
}