System and method for replacing parametrically described surface features with independent surface patches
AssigneeFord Global Technologies, LLC
InventorsPaul Joseph Stewart, Yifan Chen
Life of this patent
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Abstract
A system and method for replacing a direct surface manipulation (DSM) surface with an independent NURBS surface patch of a geometric model. The method includes the steps of sampling data points of the DSM surface and parameterizing the sampled data points. The method also includes determining knot vectors for a fitted NURBS surface patch and setting-up an equation system. The method further includes the steps of solving the equation system for the geometric model.
Claims26
A system for replacing a direct surface manipulation (DSM) surface with an independent NURBS surface patch of a geometric model comprising:
- a computer system, wherein said computer system includes a memory, a processor, a user input device and a display device;
- a computer generated geometric model stored in said memory of said computer system, wherein the geometric model is in a computer-assisted design (CAD) format;
- and
- wherein a user using the computer system samples data points of the DSM feature, parameterizes the sampled data points, determines knot vectors for a fitted NURBS surface patch, sets-up an equation system, and solves the equation system for a CAD model.
A method for replacing a direct surface manipulation (DSM) surface with an independent NURBS surface patch of a geometric model, said method comprising the steps of:
- selecting a geometric model, wherein the geometric model is in a computer-aided design (CAD) format;
- sampling data points of the DSM surface;
- parameterizing the sampled data points;
- determining knot vectors for a fitted NURBS surface patch;
- setting-up an equation system;
- and
- solving the equation system for a CAD model.
A method for replacing a direct surface manipulation (DSM) surface with an independent NURBS surface patch of a geometric model, said method comprising the steps of:
- defining input parameters;
- fitting two boundary curves with two NURBS curves satisfying a first predetermined tolerance;
- aligning a parametric space of the two converted curves;
- converting control points of the two NURBS curves into the boundary control points of the NURBS surface patch to be created;
- and
- fitting the interior of the NURBS surface patch satisfying a second predetermined tolerance.
Dependencies are inferred from the claim text.