I'm always impressed by the "straightedge-and-compass"-flavoured techniques drafters of old used to rotate views of odd 3D shapes from pairs of 2D schematics, i

I'm always impressed by the "straightedge-and-compass"-flavoured techniques drafters of old used to rotate views of odd 3D shapes from pairs of 2D schematics, in the centuries before CAD software. https://en.wikipedia.org/wiki/Descriptive_geometry#Finding_the_shortest_connector_between_two_given_skew_lines_PR_and_SU https://en.wikipedia.org/wiki/Descriptive_geometry#Finding_t... https://en.wikipedia.org/wiki/Gaspard_Monge#1789_and_after https://en.wikipedia.org/wiki/Gaspard_Monge#1789_and_after