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WebSVN – planix.SVN – Blame – /os/branches/feature_posix/sys/src/cmd/map/libmap/ccubrt.c – Rev 2

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#include <u.h>
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#include <libc.h>
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#include "map.h"
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void
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ccubrt(double zr, double zi, double *wr, double *wi)
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{
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	double r, theta;
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	theta = atan2(zi,zr);
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	r = cubrt(hypot(zr,zi));
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	*wr = r*cos(theta/3);
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	*wi = r*sin(theta/3);
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}