Patent ID: 7196702

Claim:
A method for generating a geometric object representation for display on a computational system, comprising: providing a representation of a curve; obtaining, for each of a plurality of points on the curve, data indicative of a shape of a first surface at the point, wherein said data is invariant between different graphical views of at least one of said curve and said first surface; determining a representation of said first surface using said data for each of said points, wherein said first surface contains the curve; generating a representation of a second surface having a contour that changes with a change in a collection of points of said first surface, said points of said collection not being on said curve, and not being on said second surface; wherein said contour is invariant between different graphical views; displaying, on a graphical display device, a graphical display of said second surface representation having a modified contour determined using said change in the collection of points.