Author here. Thank you! Yes, I think you have the basic gist of it. Split each line, then move an endpoint. There's nothing too complicated about the algorithm

Author here. Thank you! Yes, I think you have the basic gist of it. Split each line, then move an endpoint. There's nothing too complicated about the algorithm, the trick is really around fine tuning all of the possible parameters. If it's not obvious, my approach is purely going after aesthetic effects.