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- #include <u.h>
- #include <libc.h>
- #include "map.h"
- static struct coord center;
- static int
- Xbicentric(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);
- }
- proj
- bicentric(double l)
- {
- l = fabs(l);
- if(l>89)
- return(0);
- deg2rad(l,¢er);
- return(Xbicentric);
- }
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