shithub: riscv

ref: b4b4b6cd631e4627f8e581d20fc70d5d13f4de18
dir: /sys/src/cmd/map/libmap/cylindrical.c/

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#include <u.h>
#include <libc.h>
#include "map.h"

int
Xcylindrical(struct place *place, double *x, double *y)
{
	if(fabs(place->nlat.l) > 80.*RAD)
		return(-1);
	*x = - place->wlon.l;
	*y = place->nlat.s / place->nlat.c;
	return(1);
}

proj
cylindrical(void)
{
	return(Xcylindrical);
}