Method for producing offset surface and offset solid

Details Method for producing offset surface and offset solid Method for producing offset surface and offset solid

1992-08-19

1995-03-28

Herndon, H. R.

G06F 1562

Patent

active

054025311

ABSTRACT:
A connection condition between two adjacent original surfaces, selected from a plurality of connected original surfaces, is determined as to whether it is smooth, concave, or convex. Then, each of the original surfaces is offset at a predetermined distance along unit vectors normal to the original surface, to obtain an offset surface. Also, an original loop for each of the original surfaces is offset at the predetermined distance along unit vectors normal to the original surface at its edges to obtain an offset loop. Then, a new surface between two adjacent offset loops is interpolated when the connection condition is convex. A self-interference portion is removed when the connection condition is concave, so as to obtain a plurality of offset surfaces based on the plurality of original surfaces.

REFERENCES:
patent: 4569014 (1986-02-01), Kishi et al.
patent: 4785399 (1988-11-01), Evans et al.
patent: 4791583 (1988-12-01), Colburn
R. T. Farouki, "Exact Offset Procedures For Simple Solids," Computer aided Geometric Design 2, Apr. 1985, 257-279.
W. Tiller and E. G. Hanson, "Offsets of Two-Dimensionals Profiles," IEEE CG&A, Jul. 1984, pp. 36-46.

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