fncylinder() OpenSCAD module

This a module for OpenSCAD to create a cylinder with dynamic or fixed fn for consistent resolution.
With a fixed $fn, large cylinders are jagged and small cylinders are ultrafine.
With this module every cylinder has a fixed resolution that can be set to match the resolution of your printer.

Usage:
Like the build in module cylinder() this module accepts r,r2,d,d2,h, and center.
It doens't accept $fn, use fn instead, if you need a fixed $fn (i.e. for hexagonal cylinders).
If fn isn't