Have a data visualization question…

When was involved with data of a technical (physical/chemical) nature, when multi variables were involved, I found it useful to use “triangular” single plane diagrams that allowed “predicaion of trends as anyone of three variables took place. Unforetunately I have lost the source of the program that run on a “burroughs computer in the !970s! I have never seen this approach used for eccomomic data. Has it ever found a use? Could it be useful?.