helpers.c File Reference

#include "libgravix2/helpers.h"
#include <math.h>
#include "libgravix2/api.h"
#include "libgravix2/linalg.h"

Include dependency graph for helpers.c:

Functions
double	grvx_lat (double z)
	Computes the latitudinal position, \(\phi\), from Cartesian coordinates. More...
double	grvx_lon (double x, double y)
	Computes the longitudinal position, \(\lambda\), from Cartesian coordinates. More...
double	grvx_vlat (double vx, double vy, double vz, double lat, double lon)
	Computes the latitudinal speed, \(\dot\phi\), from Cartesian coordinates. More...
double	grvx_vlon (double vx, double vy, double vz, double lon)
	Computes the (scaled) longitudinal speed, \(\dot\lambda \cos\phi\), from Cartesian coordinates. More...
double	grvx_sinc (double x)
	Computes \(\sin(x) / x\). More...

Function Documentation

grvx_sinc()

double grvx_sinc

(

double

x

)

Computes \(\sin(x) / x\).

Save calculation of \(\sin(x) / x\). In particular, this function returns 1.0 for \(x=0\).

Parameters

x

\(x\).

Returns

\(\sin(x) / x\).