My son was really into Brio trains when he was young, and I wrote a program to visually design layouts by placing track segments one after the other. The progra

My son was really into Brio trains when he was young, and I wrote a program to visually design layouts by placing track segments one after the other. The program took that tolerance into account, and gave a score to the layout based on how much it had to force the pieces together. I had the idea of adding some automation to design complex networks but that never materialized.