System for generating a circular or elliptic arc on a digital di

Details System for generating a circular or elliptic arc on a digital di System for generating a circular or elliptic arc on a digital di

1986-04-18

1992-09-08

Herndon, H. A.

G06F 1520

Patent

active

051465515

ABSTRACT:
A method for generating a circular or elliptic arc on a digital display, especially adapted for use in a scan conversion painting system. A modified DDA method has been provided, whereby each of the intersections between scan lines and curves concerned is represented by a single point.

REFERENCES:
patent: 4283765 (1981-08-01), Rieger
patent: 4479192 (1984-10-01), Yamagami
patent: 4593406 (1986-06-01), Stone
patent: 4602346 (1986-07-01), Kawakami et al.
patent: 4631750 (1986-12-01), Gabriel et al.
patent: 4644582 (1987-02-01), Morishita et al.
patent: 4672680 (1987-06-01), Middleton
"Principles of Interactive Computer Graphics," W. M. Newman et al., pp. 27-28 and 232-243, 1979.
"A Linear Algorithm for Incremental Digital Display of Circular Arcs" J. Bresenham, pp. 100-106, Feb. 1977.
"On Linear Difference Curves", D. Cohen, 1969.

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