geodesic.c File Reference

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

Include dependency graph for geodesic.c:

Go to the source code of this file.

Macros
#define	SWAP(a, b)   temp=a;a=b;b=temp

Functions
int	G_begin_geodesic_equation (double lon1, double lat1, double lon2, double lat2)
double	G_geodesic_lat_from_lon (double lon)

Macro Definition 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().

Function Documentation

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

Definition at line 39 of file geodesic.c.

References Radians, and SWAP.

double G_geodesic_lat_from_lon

(

double

lon

)

Definition at line 75 of file geodesic.c.

References Degrees, and Radians.