Patent
1990-09-12
1995-03-07
Zimmerman, Mark K.
395142, 395150, G06F 1562
Patent
active
053965868
ABSTRACT:
An apparatus and method for filling regions bounded by piecewise-conic curves and more particularly to such an apparatus and method which is directed to curves defined by a conic equation. This simplifies the process of generating filled contours in applications, such as printing, which are based on font outlines while at the same time reducing computer time and generating more accurate results for each curve generation.
REFERENCES:
patent: 4648045 (1987-03-01), Demetrescu
Jerry Van Aken and Mark Novak. ACM Transactions on Graphics, vol. 4, No. 2, Apr. 1985, pp. 147-169. Article entitled "Curve-Drawing Algorithms for Raster Displays."
Theo Paulidis, ACM Transactions on Graphics, vol. 2, #1, Jan. 1983, pp. 1-31. Article entitled "Curve Fitting with Conic Splives."
Jerry Van Aken. IEEE Computer Graphics and Applications, Sep. 1984, Article entitled "An Efficient Ellipse-Drawing Algorithm."
M. L. V. Pitteway. The Computer Journal, vol. 10, #3, Nov. 1967. Article entitled "Algorithm for Drawing Ellipses or Hyperbolae with a Digital Plotter."
Vaughn Pratt. Siggraph '85 Proceedings, vol. 19, #3. Article entitled "Techniques for Conic Splines."
Donaldson Richard L.
Kesterson James C.
Marshall, Jr. Robert D.
Texas Instruments Incorporated
Zimmerman Mark K.
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