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#include <u.h>
#include <libc.h>
#include "map.h"
static struct coord stdpar;
static int
Xconic(struct place *place, double *x, double *y)
{
double r;
if(fabs(place->nlat.l-stdpar.l) > 80.*RAD)
return(-1);
r = stdpar.c/stdpar.s - tan(place->nlat.l - stdpar.l);
*x = - r*sin(place->wlon.l * stdpar.s);
*y = - r*cos(place->wlon.l * stdpar.s);
if(r>3) return(0);
return(1);
}
proj
conic(double par)
{
if(fabs(par) <.1)
return(Xcylindrical);
deg2rad(par, &stdpar);
return(Xconic);
}
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