geodesic.c File Reference

#include <grass/gis.h>
#include "pi.h"

Include dependency graph for geodesic.c:

Go to the source code of this file.

Defines
#define	swap(a, b)   temp=a;a=b;b=temp
Functions
double	sin ()
double	cos ()
double	tan ()
double	atan ()
int	G_begin_geodesic_equation (double lon1, double lat1, double lon2, double lat2)
double	G_geodesic_lat_from_lon (double lon)

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Define Documentation

#define swap	(	a,
		b		)	temp=a;a=b;b=temp

Definition at line 31 of file geodesic.c.

Referenced by G_begin_geodesic_equation().

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Function Documentation

double atan

(

)

Referenced by G_geodesic_lat_from_lon(), G_rhumbline_lat_from_lon(), G_set_geodesic_distance_lat1(), and G_set_geodesic_distance_lat2().

double cos

(

)

Referenced by G_begin_geodesic_equation(), G_geodesic_lat_from_lon(), and G_set_geodesic_distance_lat2().

int G_begin_geodesic_equation	(	double	lon1,
		double	lat1,
		double	lon2,
		double	lat2
	)

Definition at line 35 of file geodesic.c.

References cos(), Radians, sin(), swap, and tan().

double G_geodesic_lat_from_lon

(

double

lon

)

Definition at line 71 of file geodesic.c.

References atan(), cos(), Degrees, Radians, and sin().

double sin

(

)

Referenced by G_begin_geodesic_equation(), G_darea0_on_ellipsoid(), G_darea0_on_sphere(), G_geodesic_distance_lon_to_lon(), G_geodesic_lat_from_lon(), G_meridional_radius_of_curvature(), G_radius_of_conformal_tangent_sphere(), G_set_geodesic_distance_lat2(), and G_transverse_radius_of_curvature().

double tan

(

)

Referenced by G_begin_geodesic_equation(), G_begin_rhumbline_equation(), G_set_geodesic_distance_lat1(), and G_set_geodesic_distance_lat2().

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