In article <385ACC3F.AD113882@isd.net>, lfo### [at] isdnet wrote:

> Identical to one formed by a sphere_sweep? (ie circular cross-section)

Well, this one looks like a sphere sweep, the documentation covers the 
parameters:
   function "helix1", <1, 5, 0.2, 1, 1, 1, 0>
This function is a bit different, it will always create circular 
surfaces when sliced with a plane perpendicular to the axis of the 
helix. I think. It doesn't act like a sphere_sweep, though, more like a 
circle_sweep. I broke it up to make it more modular.
#declare cylFunc = function {sqrt((x-1)^2 + z^2)-y}

function {cylFunc(x+sin(5*y), 0.5, z+cos(5*y))}

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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