File: init.c

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grass 6.0.2-6
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#include "distance.h"
#include "gis.h"

int init_grass (void)
{
	double a,e2;
	double factor;

	G_get_set_window(&window);
	if (window.proj == PROJECTION_LL)
	{
		G_get_ellipsoid_parameters (&a, &e2);
		G_begin_geodesic_distance  (a, e2);
		wrap_ncols = (360.0 - (window.east-window.west))/window.ew_res + 1.1;
		/* add 1.1 instead of 1 to insure that we round up, not down */
	}
	else
	{
		wrap_ncols = 0;
		factor = G_database_units_to_meters_factor();
		if (factor <= 0.0)
			factor = 1.0;
		meters_to_grid = 1.0/factor;
	}

	return 0;
}