OpenSCAD Standard Thread Library

A thread library for OpenSCAD that generates screw threads mathematically and renders them as a polyhedron. This creates much smoother models without gaps or overlaps vs the more common method of using `linear_extrude`.

This library has two methods.

`standard_screw` creates a screw using the standard measurements, pitch, major diameter, minor diameter, and crest.

`screw` is similar to `standard_screw` but takes more parameters for more control over the shape of the threads.