Interactive graphics on the CRAY-1 supercomputer

The design and implementation of a state-of-the-art interactive vector graphics system connected to the CRAY-1 supercomputer are described. The primary design goal for this graphics system is that it support large hydrodynamic computer programs used in weapons-design calculations. The interactive use of these programs requires displays consisting of up to 20,000 vectors, extensive interaction tools, and high-bandwidth communication rates. The major system components selected for this project were an Evans and Sutherland Picture System 2 and a Digital Equipment Corporation PDP-11/70 and PDP-11/34 running the UNIX operating system. The system design goals and performance criteria are presented. The hardware/software systems chosen for this project are reviewed, and the intergration of this system into the Los Alamos Scientific Laboratory's Integrated Computer Network is described. This implementation involved most areas of applied computing, including computer graphics, data bases, communications, distributed processing, and computer security. The level of effort required for this implementation is described, and the results and benefits are presented. Future plans for this system are also briefly described.