
Accession Number : ADD006856
Title : Digital Plotting System for Displaying Curved Line Information.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Herman,Robert W ; Reins,Edward R
Report Date : 10 Apr 1979
Pagination or Media Count : 25
Abstract : A digital plotting system for displaying curved line information. This system 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 deg. when EVEN and counterclockwise 45 deg. 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. (Author)
Descriptors : *Patents, *Plotters, *Display systems, Curves(Geometry), Rotation, Digital systems, Graphics
Subject Categories : Computer Hardware
Distribution Statement : APPROVED FOR PUBLIC RELEASE