xtan.c File Reference

#include <stdlib.h>
#include <math.h>
#include <grass/gis.h>
#include <grass/raster.h>
#include <grass/calc.h>

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Macros
#define	DEGREES_TO_RADIANS   (M_PI / 180.0)

Functions
int	f_tan (int argc, const int *argt, void **args)

Macro Definition Documentation

DEGREES_TO_RADIANS

#define DEGREES_TO_RADIANS   (M_PI / 180.0)

Definition at line 18 of file xtan.c.

Referenced by f_tan().

Function Documentation

f_tan()

int f_tan	(	int	argc,
		const int *	argt,
		void **	args
	)

Definition at line 20 of file xtan.c.

References columns, DCELL_TYPE, DEGREES_TO_RADIANS, E_ARG_HI, E_ARG_LO, E_ARG_TYPE, E_RES_TYPE, floating_point_exception, IS_NULL_D, and SET_NULL_D.