A general purpose three dimensional physical modeling program

The Computing Hardware: The three dimensional modeling program was written for a general purpose mini-computer and a three dimensional graphics display processor. The mini~computer is a PDP-ii/21 with 24K, 16 bit words of memory and an extended arithmetic element (EAE) to perform signed integer multiplication. PDP-ii peripherals include a pair of dectape drives, a small fixed head disk, analog to digital converters, and a decwriter.