OpenSCAD Library: Parametric joint generator

An addition to the OpenSCAD library, which can be used to create right angle T-joints, which are preferred over simple rectangular "face-on" connections: their stability against breaking off the leg is much higher. This isn't just due to the added material: Same principle applies and can be observed with, for example, a rip in a piece of fabric. A right angle connection of a simple stick-on joint corresponds to the rip - when undealt with, does the rip easily propagate along and further into the