Marble

RoutingPoint.cpp
1// SPDX-License-Identifier: LGPL-2.1-or-later
2//
3// SPDX-FileCopyrightText: 2010 Dennis Nienhüser <nienhueser@kde.org>
4//
5
6#include "RoutingPoint.h"
7
8#include <QTextStream>
9
10#include <cmath>
11
12namespace Marble
13{
14
15RoutingPoint::RoutingPoint(qreal lon, qreal lat)
16 : m_lon(lon)
17 , m_lonRad(lon * M_PI / 180.0)
18 , m_lat(lat)
19 , m_latRad(lat * M_PI / 180.0)
20{
21 // nothing to do
22}
23
24qreal RoutingPoint::lon() const
25{
26 return m_lon;
27}
28
29qreal RoutingPoint::lat() const
30{
31 return m_lat;
32}
33
34// Code based on https://www.movable-type.co.uk/scripts/latlong.html
35qreal RoutingPoint::bearing(const RoutingPoint &other) const
36{
37 qreal deltaLon = other.m_lonRad - m_lonRad;
38 qreal y = sin(deltaLon) * cos(other.m_latRad);
39 qreal x = cos(m_latRad) * sin(other.m_latRad) - sin(m_latRad) * cos(other.m_latRad) * cos(deltaLon);
40 return atan2(y, x);
41}
42
43// From MarbleMath::distanceSphere
44qreal RoutingPoint::distance(const RoutingPoint &other) const
45{
46 qreal h1 = sin(0.5 * (other.m_latRad - m_latRad));
47 qreal h2 = sin(0.5 * (other.m_lonRad - m_lonRad));
48 qreal d = h1 * h1 + cos(m_latRad) * cos(other.m_latRad) * h2 * h2;
49
50 return 6378137.0 * 2.0 * atan2(sqrt(d), sqrt(1.0 - d));
51}
52
53QTextStream &operator<<(QTextStream &stream, const RoutingPoint &p)
54{
55 stream << "(" << p.lon() << ", " << p.lat() << ")";
56 return stream;
57}
58
59} // namespace Marble
There are many Point classes, but this is mine.
qreal lon() const
Longitude of the point.
qreal lat() const
Latitude of the point.
Binds a QML item to a specific geodetic location in screen coordinates.
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