Digital plotting system for displaying curved line information

Details Digital plotting system for displaying curved line information Digital plotting system for displaying curved line information

1977-12-27

1979-04-10

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340799, G06K 1520

Patent

active

041491653

ABSTRACT:
A digital plotting system for displaying curved line information. This sym employs short vector information that provides an incremental trace of a curve that is defined by a variable exception vector that is dependent upon trend and exception vectors represented by ODD and EVEN bits described as binary 1's or 0's. When the bit is a binary 0, for example, the vector, whether ODD or EVEN, will continue in the same direction as the immediately preceding vector. However, when the bit is a binary 1 then the vector will change its direction clockwise 45.degree. when EVEN and counterclockwise 45.degree. when ODD, with respect to the immediately preceding vector. The short vector logic is compatible for use with a digital plotting system for displaying all forms of graphic information including curved lines, straight lines and characters.

REFERENCES:
patent: 3335415 (1967-08-01), Conway et al.
patent: 3438003 (1969-04-01), Bryan
patent: 3657716 (1972-04-01), Ambrico
patent: 3675230 (1972-07-01), Pitteway
patent: 3781848 (1973-12-01), Rosenthal
patent: 3821729 (1974-06-01), Schultze
patent: 3946365 (1976-03-01), Bantner
patent: 4115863 (1978-09-01), Brown

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