/*  * 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" intXpolyconic(struct place *place, double *x, double *y){	double r, alpha;	double lat2, lon2;	if(fabs(place->nlat.l) > .01) {		r = place->nlat.c / place->nlat.s;		alpha = place->wlon.l * place->nlat.s;		*y = place->nlat.l + r*(1 - cos(alpha));		*x = - r*sin(alpha);	} else {		lon2 = place->wlon.l * place->wlon.l;		lat2 = place->nlat.l * place->nlat.l;		*y = place->nlat.l * (1+(lon2/2)*(1-(8+lon2)*lat2/12));		*x = - place->wlon.l * (1-lat2*(3+lon2)/6);	}	return(1);} projpolyconic(void){	return(Xpolyconic);}