geomutils

The module geomutils contains functions for geometric calculations.

Some of the functions need the typ DPOINT .. code-block:: c++

typedef std::pair<double, double> DPOINT;

which is defined in types.h

Code:
geomutils.h
geomutils.cpp

Functions

spherInterpol

sphercoord spherInterpol(const sphercoord &dP1, const sphercoord &dP2, double dT);

Finds the point at a fraction dT of thSpherical interpolation beetween the the two points

dP1

longitude and latitude of first point (in degrees).

dP2

longitude and latitude of second point (in degrees).

dT

Fraction of the great circle through dP1 and dP2 to reach resultig point.

Returns the coordinates (longitude&latitude) of the resulting point.

spherInterpol

Vec3D spherInterpol(const Vec3D &v1, const Vec3D &v2, double dT);

Finds the point at a fraction dT of thSpherical interpolation beetween the the two points.

v1

3D vector to first point.

v2

3D vector to second point.

dT

Fraction of the great circle through v1 and v2 to reach resultig point.

Returns the 3D vector to the resulting point.

cart2polarD

sphercoord cart2PolarD(const Vec3D &v);

Convert a 3D vector to polar coordinates (degrees).

v

vector to convert.

Returns the coordinates (longitude&latitude) corresponding to v.

polarD2cart

Vec3D polarD2Cart(sphercoord &p);

Convert spherical coordinates (in degrees) to a 3D vector.

p

spherical coordinates to convert.

Returns 3D vector corresponding to the spherical coordinatesin p.

cart2polar

sphercoord cart2Polar(cosnt Vec3D &v);

Convert a 3D vector to polar coordinates (radians).

v

vector to convert.

Returns the spherical coordinates (radians) corresponding to v.

polar2cart

Vec3D polar2Cart(const sphercoord &p);

Convert spherical coordinates (in radians) to a 3D vector.

p

spherical coordinates to convert.

Returns 3D ector corresponding to the spherical coordinates.

spherdist

double spherdist(double dLon1, double  dLat1, double dLon2, double dLat2, double dR);
double spherdist(Vec3D *v1, Vec3D *v2, double dR);
double spherdist(double dX0, double dY0, double dZ0, double dX1, double dY1, double dZ1, double dR);
double spherdist(double dX0, double dY0, double dZ0, double dLon2, double dLat2, double dR);

Calculate the distance between two points which are specified in different ways.

dLon1, dLat1

spherical coordinates (radians) of first point.

dLon2, dLat2

spherical coordinates (radians) of second point.

dX1, dY1, dZ1

3D coordinates of first point.

dX2, dY2, dZ2

3D coordinates of second point.

dR

Earth (or sphere) radius.

Retrurns the distance between thee two points along a great circle.

spherdistDeg

double spherdistDeg(double dLon1, double  dLat1, double dLon2, double dLat2, double dR);

Calculate the distance between two points whose spherical coordinates are given in degrees.

dLon1, dLat1

spherical coordinates (degrees) of first point.

dLon2, dLat2

spherical coordinates (degrees) of second point.

dR

Earth (or sphere) radius.

Retrurns distance along great circle.