#include <u.h>#include <libc.h>#include "map.h" static struct coord center; static intXbicentric(struct place *place, double *x, double *y){	if(place->wlon.c<=.01||place->nlat.c<=.01)		return(-1);	*x = -center.c*place->wlon.s/place->wlon.c;	*y = place->nlat.s/(place->nlat.c*place->wlon.c);	return(*x**x+*y**y<=9);} projbicentric(double l){	l = fabs(l);	if(l>89)		return(0);	deg2rad(l,&center);	return(Xbicentric);}