Straight line coordinates generator

Details Straight line coordinates generator Straight line coordinates generator

1982-01-21

1984-10-23

Shaw, Gareth D.

Boots, shoes, and leggings

364520, 364521, 340722, 340744, 340753, G06F 3153

Patent

active

044791925

ABSTRACT:
A new and improved straight line coordinates generator to determine and generate the coordinates of a group of lattice points [P.sub.k (k=1, 2, . . . , n-1)] to simulate an actual line defined by connecting the two lattice points P.sub.O (X.sub.o, Y.sub.o) and P.sub.n (X.sub.n, Y.sub.n), on a secondary coordinates face comprises registers, adders, comparators, a clock generator gate circuit, X-coordinate counter for determining X-coordinate values, Y-coordinate counter for determining Y-coordinate values, an initializing device for setting the registers with initial normalizing values and a generator for sequentially generating each X and Y coordinate of the lattice points to simulate the line. The circuit arrangement of the straight line coordinates generator is simplified by eliminating the need for decimal points in determining the coordinates of the lattice points to be lightened or highlighted to form the simulated line.

REFERENCES:
patent: 3591780 (1971-07-01), Rosenfeld
patent: 4272808 (1981-06-01), Hartwig
"Principles of Interactive Computer Graphics" by William M. Newman and Robert F. Sproull, McGraw-Hill, 1979, pp. 20-27.
Hewlett-Packard Journal, Jan. 1978.

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