In geometry, a spring is a surface in the shape of a coiled tube,
generated by sweeping a circle about the path of a helix.
Note that the previous definition uses a vertical circular cross section.
This is not entirely accurate as the tube becomes increasingly distorted
as the Torsion[1] increases
An alternative would be to have a circular cross section in the plane perpendicular to the helix curve.
This would be closer to the shape of a physical spring.
The mathematics would be much more complicated.
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