OpenSCAD helical extrude and thread library

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Here is a universal helical extrude library for OpenSCAD I wrote a while ago. You can extrude any polygon in the form of [[x1,z1],[x2,z2],[x3,z3],...] It has 5 different helix generation modes: pitch / height pitch / revolutions helix_angle / height helix_angle / revolutions revolutions / height I also added a little thread library that uses the helix_extrude module. Both libraries are ready to use if you have deleted the example line.