Your _cube can be replaced with: 
sub _cube { $_[0] ** 3 }

[download]
but _cuberoot is a bit tougher if it might have negative bases: 
sub _cuberoot {
  my $res = abs($_[0])**(1/3);
  $_[0] < 0 ? -$res : $res;
}

[download]

-- Randal L. Schwartz, Perl hacker

In reply to Re: Re: Re: Shading with HTML colors - color_munge by merlyn
in thread Shading with HTML colors - color_munge by $code or die

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