(One day old to povray)
I want to render catenary wires (will assume them to be plain in texture)
There's an old, but useful thread for rendering catenary chains here
http://news.povray.org/povray.binaries.images/thread/%3Cweb.42f332855de03cffa196ebe30%40news.povray.org%3E/

I modified the code, and basically instead of torus links, with alternating 90
degree rotation, I made them cylindrical with no rotation. However this is a
naive way to extrude.

How can I do this? Basically use polygon
sweep(http://www.povray.org/documentation/view/3.6.2/62/) along an array of 3D
points got by solving for a catenary

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