25 lines
437 B
C
25 lines
437 B
C
#include <u.h>
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#include <libc.h>
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#include "map.h"
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static struct coord center;
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static int
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Xbicentric(struct place *place, double *x, double *y)
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{
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if(place->wlon.c<=.01||place->nlat.c<=.01)
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return(-1);
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*x = -center.c*place->wlon.s/place->wlon.c;
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*y = place->nlat.s/(place->nlat.c*place->wlon.c);
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return(*x**x+*y**y<=9);
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}
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proj
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bicentric(double l)
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{
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l = fabs(l);
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if(l>89)
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return(0);
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deg2rad(l,¢er);
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return(Xbicentric);
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}
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