shithub: riscv

ref: 12d6eb0ce3d6701a7a5e44083e18a3cb32a64539
dir: /sys/src/cmd/map/libmap/ccubrt.c/

View raw version 
#include <u.h>
#include <libc.h>
#include "map.h"

void
ccubrt(double zr, double zi, double *wr, double *wi)
{
	double r, theta;
	theta = atan2(zi,zr);
	r = cubrt(hypot(zr,zi));
	*wr = r*cos(theta/3);
	*wi = r*sin(theta/3);
}