Patent
1992-07-22
1993-08-31
Zimmerman, Mark K.
G06F 1562
Patent
active
052416542
ABSTRACT:
Coordinate values of control points of a given Bezier curve are stored in a register, the contents of the register are supplied to a determination circuit to determine whether a distance between adjacent control points can further be bisected into two parts. If bisecting processing can be performed, the contents of the register are supplied to a bisection circuit, the Bezier curve is subdivided into two parts to generate new Bezier curves, and control point data of one of the new Bezier curves is applied to a stack memory and that of the other new Bezier curve is sent to the register. The contents of the register are checked by the determination circuit each time the contents of the register are updated.
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W. Newman & R. Sproull, "Principles of Interactive Computer Graphics," pp. 315-320, 325-329, McGraw-Hill, 1979.
F. Cheng et al., "Bezier Curve Generator: A Hardware Approach to Curve Generation," International Symposium on VLSI Technology, Systems and Applications, 1985.
Kai Naoyuki
Nagashima Ichiro
Ohhashi Masahide
Kabushiki Kaisha Toshiba
Zimmerman Mark K.
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