plan9port

fork of plan9port with libvec, libstr and libsdb
Log | Files | Refs | README | LICENSE

cylindrical.c (287B)

      1 #include <u.h>
      2 #include <libc.h>
      3 #include "map.h"
      4 
      5 int
      6 Xcylindrical(struct place *place, double *x, double *y)
      7 {
      8 	if(fabs(place->nlat.l) > 80.*RAD)
      9 		return(-1);
     10 	*x = - place->wlon.l;
     11 	*y = place->nlat.s / place->nlat.c;
     12 	return(1);
     13 }
     14 
     15 proj
     16 cylindrical(void)
     17 {
     18 	return(Xcylindrical);
     19 }