Spline manipulation tool

Details Spline manipulation tool Spline manipulation tool

2007-05-15

2007-05-15

Tung, Kee M. (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Shape generating

C345S441000

Reexamination Certificate

active

10866314

ABSTRACT:
Methods, computer program products and systems for manipulating a spline are described. A spline can be displayed. A tangent bar that is tangent to a point on the spline and/or a curvature bar at the point can be displayed. A user input can be received defining one or more constraints on at least one of the tangent bar or the curvature bar, and the shape of the spline can be modified based on the one or more constraints.

REFERENCES:
patent: 6154221 (2000-11-01), Gangnet
patent: 6441823 (2002-08-01), Ananya
patent: 6636217 (2003-10-01), Hill
2D Dimensional Constraint Manager, D-CUBED, retrieved from http://www.d-cubed.co.uk/prod—DCM2—intro.htm on Jun. 4, 2004.

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