George W Celniker

6369815, Apr 9, 2002

Apr 23, 1999

09/299037

George Celniker - Austin TX
Richard M. Sowar - Boulder CO

Spatial Technology, Inc. - Boulder CO

G06T 1700

345420, 345429

For simultaneous deformations of multiple surfaces, a constraint called a link constraint is created to link two faces that are to be deformed together. The link constraint consists of a relationship between a constraint curve in each face to be deformed. The selected constraint curve may be any curve, including trimmed curves and part of a boundary curve. As the faces are deformed, the link constraint limits the deformation of the faces by acting as a zipper between the two surfaces along the selected constraint curve. For local deformations within a surface, a hierarchy is created within specific areas, known as patches, of an individual face in a model, ensuring that when a patch in the hierarchy is deformed, the deformation affects patches lower in the hierarchy than that patch, but the deformation does not affect patches higher in the hierarchy. A constraint curve known as a seam, which may be any simple closed loop curve, is used to define the relationship between a patch, known as a parent patch, and a patch directly below that patch in the hierarchy, known as a child patch. For each seam, a seam constraint is created which limits the deformation of the associated child patch and all its children by forcing the child patch to maintain connectivity with its parent patch along the seam.

20040174362, Sep 9, 2004

Feb 11, 2004

10/776128

George Celniker - Austin TX, US

G06T011/20

345/441000

The invention is a method and computer application, implemented as a computer program, for modifying the shape of free-form Computer Aided Design (CAD) curves and surfaces to eliminate bad gap problems from CAD databases. The change of shape invention is based on an optimization algorithm that modifies a free-form shape to minimize its connectivity gaps while being constrained to minimize any changes in initial shape. The invention can be used to eliminate bad connectivity gaps, tangency gaps, curvature gaps, and gaps based on higher order differential properties. The invention can be used to modify any free-form curve or surface shape that is represented as a linear sum of basis functions. This class of functions includes but is not limited to B-splines, NURBS, and Hermite polynomials.

61285773, Oct 3, 2000

Dec 19, 1996

8/772082

Steven Brent Assa - Austin TX
George William Celniker - Austin TX
David Mack Endres - Leander TX

Schlumberger Technology Corporation - Austin TX

G06F 1900

702 2

The invention features a method, computer system, and computer program for analyzing geological data stored on computer-readable media, including organizing the data to represent a plurality of sub-regions and a feature, and classifying the feature into a subset of the plurality of sub-regions. The method, computer system, and computer program analyze geological data stored on computer-readable media, including organizing the data to represent a plurality of sub-regions, and editing the sub-regions. The method, computer system, and computer program analyze geological data stored on computer-readable media, including organizing the data into a database, which includes a geometry part and a separate design part. The method, computer system, and computer program includes preserving the shape of a feature during classification and editing. The method, computer system, and computer program organize geological data to represent a region and subdivide the region into a first sub-region and a second sub-region with a boundary at a first location.

52376478, Aug 17, 1993

Oct 28, 1991

7/784649

Andrew F. Roberts - Charlestown MA
Emanuel M. Sachs - Somerville MA
David R. Stoops - Cambridge MA
Karl T. Ulrich - Belmont MA
Todd L. Siler - Cambridge MA
David C. Gossard - Andover MA
George W. Celniker - Cambridge MA

Massachusetts Institute of Technology - Cambridge MA

G06F 1560
G08C 2100

395119

A computer system for aiding in the design of an object, comprising a first sensor representing the object and adapted to be moved in three dimensions in a work area by a designer, the first sensor providing signals to the computer system that indicate its position and orientation in the work area, and a second sensor adapted to be moved by the designer in three dimensions in the work area, the second sensor providing signals to the computer system that indicate its position and orientation in the work area; the computer system responds to the signals from the first and second sensors by creating a displayed image corresponding to a three-dimensional model of the object in a virtual work area that corresponds to the designer's work area, the model comprising lines that each have a shape and position that corresponds to movement by the designer of at least one of the sensors, and by controlling the position and orientation of the model in the virtual work area in accordance with the motion of at least one of the sensors.

62566032, Jul 3, 2001

Feb 5, 1998

9/019465

George William Celniker - Austin TX

Schlumberger Technology Corporation - Austin TX

G06G 748

703 10

A method, computer system, and computer program for analyzing geological data sampled from a subsurface region and an analysis of the geological data stored in a geoscience model on a magnetic media, including building a simulation input model from the geoscience model. Data is acquired and interpreted to produce a geoscience model. A boundary is constructed for dividing the region into a first sub-region and a second sub-region; storing on the magnetic media the shape of the boundary as a parametric function whose parameter density can vary. A subsurface region divided into sub-regions, in each of which a material property varies without discontinuities.

59056576, May 18, 1999

Dec 19, 1996

8/770209

George William Celniker - Austin TX

Schlumberger Technology Corporation - Austin TX

G06F9/455

364578

A method, computer system, and computer program for simulation based interpretation of geological data stored in a geoscience model. Data is acquired and interpreted to produce a geoscience model. A simulator is applied to a simulation input model to produce synthetic data. The synthetic data is compared to the acquired data, which was used to build the geoscience model. The geoscience model is edited to reduce the difference between the acquired data and the synthetic data.