Cad free-form reshaping method

Details Cad free-form reshaping method Cad free-form reshaping method

1993-09-24

1995-05-02

Nguyen, Phu K.

G06F 1500

Patent

active

054127700

ABSTRACT:
An method to reshape parametrically expressed free forms on a CAD system permits more natural reshaping by direct reshaping and smoother reshaping of curves by simultaneously moving multiple control points. The reshaping method determines whether a cursor whose coordinates are input from an input device has traversed the free form, calculates new form-defining parameters to determine a segment of the form including the point of traverse when the cursor proved to have traversed so that the newly created segment of the form does not intersect the locus drawn by the traversing cursor, and achieves the intended reshaping by creating a new form based on the new form-defining parameters.

REFERENCES:
patent: 4686635 (1987-08-01), Schrieber
patent: 5261033 (1993-11-01), Oka
patent: 5261034 (1993-11-01), Kawata

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