Geometric modelling in ALGOL 68

Abstract

The paper describes the experiences of a small team in writing a substantial ALGOL 68 program to model the shapes of engineering components. The application derives much advantage from structures, operators and the heap. It includes a command interpreter, graphics package, vector and matrix routines, and procedures for moving data structures on the heap to and from disc. A system has been devised to ensure safe, selective compilation of program segments.