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#ifndef SphereCalculus_H
#define SphereCalculus_H
#include <QObject>
#include <QGeoCoordinate>
// Abstract class providing methods to do calculations on objects located on a sphere (e.g. earth)
class SphereCalculus : public QObject
{
Q_OBJECT
public:
SphereCalculus(QObject *parent = nullptr);
SphereCalculus(const SphereCalculus &other, QObject *parent = nullptr);
SphereCalculus &operator=(const SphereCalculus &other);
enum JoinPolygonError { NotSimplePolygon, Disjoint, NoError, PathSizeLow};
enum IntersectionType { NoIntersection, EdgeIntersection, Inside};
// Property setters
void setEpsilonMeter(double epsilon);
// Property getters
double epsilonMeter() const;
// Member Methodes
int closestVertexIndex (const QList<QGeoCoordinate> &path, const QGeoCoordinate &coordinate) const;
QGeoCoordinate closestVertex (const QList<QGeoCoordinate> &path, const QGeoCoordinate &coordinate) const;
int nextVertexIndex (int index) const;
int previousVertexIndex (int index) const;
JoinPolygonError joinPolygon (const QList<QGeoCoordinate> &polygon1, const QList<QGeoCoordinate> &polygon2,
QList<QGeoCoordinate> &joinedPolygon) const;
IntersectionType intersects (const QList<QGeoCoordinate> &line1, const QList<QGeoCoordinate> &line2,
QGeoCoordinate &intersectionPt)const;
IntersectionType intersects (const QList<QGeoCoordinate> &polygon, const QList<QGeoCoordinate> &line,
QList<QGeoCoordinate> &intersectionList, QList<QPair<int, int>> &neighbourList)const;
IntersectionType intersects (const QList<QGeoCoordinate> &polygon, const QList<QGeoCoordinate> &line) const;
bool dijkstraPath (const QList<QGeoCoordinate> &polygon, const QGeoCoordinate& c1,
const QGeoCoordinate& c2, QList<QGeoCoordinate>& dijkstraPath) const;
bool isSelfIntersecting (const QList<QGeoCoordinate> &path);
signals:
public slots:
private:
double distInsidePoly (const QGeoCoordinate& c1, const QGeoCoordinate& c2, QList<QGeoCoordinate> polygon);
double _epsilonMeter; // The accuracy used for distance calculations (unit: m).
};
#endif // SphereCalculus_H