Accession Number:

ADA021640

Title:

Plotting Software for the Illustromat-Recordamat System.

Descriptive Note:

Final rept.,

Corporate Author:

BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s):

• Hirschberg,Morton A.
• Soroka,Bernard

Report Date:

1976-02-01

Pagination or Media Count:

126.0

Abstract:

The Illustromat-Recordamat plotting system forms a complete graphics system. The machines may be used as a digitizer, accepting two or more views of a blueprint, or data on a magnetic tape. As no software existed to prepare magnetic tape input, it became attractive to design a Cal-Comp-like library of subroutines to fulfill this function. Besides greatly expanding the systems capability, compatibility with other government agencies, andor contractors having access to Cal-Comp software was achieved. The Illustromat plotter is an analog machine with a .005 inch resolution, Combined with the Recordamat 1250-2 mini computer a 16 bit machine with 8192 words of memory built by Lockheed Electronics the plotter may be directed to move to a point, draw straight lines, draw circles, and draw general curved lines using cubic interpolation. Data generated by the routines described in this report drives the plotting system. Driving data is stored as 7 bit NRZI code at a density of 556 bits per inch. Limitations of the hardware and suggested solutions are described. Use of formatted data of two views of an object to reconstruct its three-dimensional representation is a desired goal for the future. Author

Descriptors:

• *COMPUTER PROGRAMS
• *COMPUTER GRAPHICS
• *PLOTTERS
• COMPATIBILITY
• SUBROUTINES
• MAGNETIC TAPE
• MINICOMPUTERS
• DRAFTING

Subject Categories:

• Computer Programming and Software
• Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE