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Projection: obtaining a two-dimensional view of a three-dimensional
picture
Scrolling of the picture.
•
For graphics input, the control program provides logical input devices
called locator, pick, string, and stroke. The user operates these
logical devices (which are described in detail in Chapter 4) from the
keyboard, the tablet, or the mouse.
•
Host-interactive and personal computing applications can use the
plotters attached to the work station.
•
Alphanumeric and graphics data displays can be printed on the work
station printers. This is achieved using a spool print facility that builds
a picture interchange format file, and another utility that prints it.
•
The programming language APL is supported for host-interactive
application programs.
Host Programming Support
The IBM 5279 and the IBM 5379 work stations can use the extensive
programming support available in the host computer for the IBM 3270
display system.
For graphics, the program product Graphical Data Display Manager
(GDDM) Release 4 provides the following support for the work stations:
•
Vector graphics.
•
Graphics input.
•
Plotters attached to the work stations.
•
The use of picture interchange format files for the transfer of graphics
data between work station and host.
•
Migration, without change, of IBM 3270 application programs that use
programmed symbol set graphics.
Personal Computing Programming Support
Subject to certain limitations (described in detail in Appendix B), the work
stations can run programs under PC DOS 2.1 that use the IBM PC Color
Graphics Adapter, in alphanumeric and graphics modes.
6
Introducing the IBM 3270 Personal Computer/G and /GX Work Stations
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