/*  * 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"  intXorthographic(struct place *place, double *x, double *y){	*x = - place->nlat.c * place->wlon.s;	*y = - place->nlat.c * place->wlon.c;	return(place->nlat.l<0.? 0 : 1);} projorthographic(void){	return(Xorthographic);} intolimb(double *lat, double *lon, double res){	static first  = 1;	if(first) {		*lat = 0;		*lon = -180;		first = 0;		return 0;	}	*lon += res;	if(*lon <= 180)		return 1;	first = 1;	return -1;}