A Method for Defining General Networks for CAD, Using Interactive Computer Graphics

The use of interactive computer graphics in CAD applications requires a great deal of programming effort. To avoid this effort many general display handlers and graphic languages have been written. They enable programming on a higher level as well as calls in a higher level programming language but they suffer from three disadvantages: they are oriented too much towards graphics and geometry, the handlers and languages are procedure oriented as opposed to problem oriented and modification in picture primitives requires re-programming and re-compiling. This paper proposes a method for defining general networks which overcomes these problems. (Received February 1973)