/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <u.h>#include <libc.h>#include "map.h" static double scale; static intXgall(struct place *place, double *x, double *y){	/* two ways to compute tan(place->nlat.l/2) */	if(fabs(place->nlat.s)<.1)		*y = sin(place->nlat.l/2)/cos(place->nlat.l/2);	else		*y = (1-place->nlat.c)/place->nlat.s;	*x = -scale*place->wlon.l;	return 1;} projgall(double par){	double coshalf;	if(fabs(par)>80)		return 0;	par *= RAD;	coshalf = cos(par/2);	scale = cos(par)/(2*coshalf*coshalf);	return Xgall;}