Illinois' reply to Maxwell's request for graphics information (NIC 14925) (RFC0472)
Original Publication Date: 1973-Mar-01
Included in the Prior Art Database: 2019-Feb-12
Internet Society Requests For Comment (RFCs)
Network Working Group Steve Bunch RFC # 472 ILL-ANTS NIC # 14801 March, 1973
Illinois’ reply to Maxwell’s Request for Graphics Information, NIC Document 14925.
This is a reply to Craig Maxwell’s (UCLA-NMC) "Request for graphics information" of 3/7/73. Further details can be obtained by contacting me directly.
To date, our work in graphics has been primarily centered about support for several applications groups. To make the generation of beam- oriented graphics as painless as possible for these groups, our policy for supporting this type of graphics has been to emulate as closely as possible the CALCOMP plotter support package on the host machine, but with NGP0 output. (Presently, before the resulting NGP can be sent to some of our peripherals, e.g., Gould 4800, it must be converted to device specifics. With the advent of ANTS MARK II and a PDP-11/45, all conversions will be handled locally, so all graphics flowing into our system will be NGP). We find this approach very labor-saving, even at the present slightly kludgey level.
We also have some grey-scale work taking place on our GOULD and IMLAC. One group is processing satellite pictures on Illiac and will soon need grey-scale output, another is producing natural-resource maps, and a third is generating holograms. No standardization plans have been made for grey scale work, but if an acceptable standard is established, we will most likely use it.
A small group, including myself, is currently planning an interactive graphics system. The system will use multiple hosts, possibly using a remote E&S machine for rotation, scaling, etc. We have a number of large hurdles that have to be jumped before we can do anything, though. Several of these are not graphics-specific, such as process-controlled FTP, inter-process coordination among hosts, and others. We had intended to let efficiency dictate the format of intermediate results shipped via the Net, with standardization being applied where it is helpful for minimizing effort. Since the system will be highly interactive and will also manipulate grey-scale data, we will need a higher level of graphics protocol to handle the user interface. A "proto-prototype" system is being used now to do some simple manipulations of meteorological data (e.g., contouring, 3-D plotting)
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RFC 472 Reply to Request for Graphics Information March 1973
with an IMLAC passively displaying the NGP0 pictures...