1 28994509 2004-04-21 devnull #include <u.h>
 2 28994509 2004-04-21 devnull #include <libc.h>
 3 28994509 2004-04-21 devnull #include "map.h"
 4 28994509 2004-04-21 devnull 
 5 28994509 2004-04-21 devnull void
 6 28994509 2004-04-21 devnull ccubrt(double zr, double zi, double *wr, double *wi)
 7 28994509 2004-04-21 devnull {
 8 28994509 2004-04-21 devnull 	double r, theta;
 9 28994509 2004-04-21 devnull 	theta = atan2(zi,zr);
10 28994509 2004-04-21 devnull 	r = cubrt(hypot(zr,zi));
11 28994509 2004-04-21 devnull 	*wr = r*cos(theta/3);
12 28994509 2004-04-21 devnull 	*wi = r*sin(theta/3);
13 28994509 2004-04-21 devnull }