Bentley Systems, Inc.

Earlin Lutz

Keith A Bentley

Samuel W Wilson

John Gooding

James Bartlett

David Stradley

George R Smith

Mark Schlosser

In an example embodiment, a technique is provided for encoding trim geometry for application in a GPU. For a UV trim polygon associated with a surface, the UV trim polygon is recursive subdivided into a predetermined number of tiles to produce a set of tiles. Each tile of set of tiles is represented by a value in an array, where the value indicates whether the area of the UV trim polygon corresponding to the tile is entirely solid, is entirely void, or for a case where the tile includes both a solid portion and a void portion, provides an index into an associated linear trim array that stores a trim expression. The set of tiles, and the portions of the linear trim array pointed therefrom, are applied in the GPU to render a trimmed representation of the surface.

Technique for compact and accurate encoding trim geometry for application in a graphical processing unit

A computer system for modeling is disclosed, where the computer system has a storage device, first and second platforms, a portable persistent model, and first and second platform-dependent computerized modeling systems (CMS). Each platform is interfaced to the storage device and provides system-dependent services. The first platform has a first type of operating system and a first type of computer hardware including a first memory, and the second platform has a second type of operating system and a second type of computer hardware including a second memory. The model resides in the storage device in a platform-independent format and includes persistent component objects. The first CMS resides in the first platform memory and the second platform-dependent CMS resides in the second platform memory. Each CMS provides CMS services including retrieving the model from the storage device, manipulating the model, changing the model by adding and removing persistent objects, and persistently saving the model to the storage device. Each CMS includes a static kernel and a dynamic framework. The kernel executes on the platform and interfaces to the operating system and the computer hardware, and provides services necessary to load and execute CMS services and to interface to the platform services. The framework executes on the platform and interfaces to the kernel, provides a platform-independent visual interface between the CMS and a CMS user, and employs the services of the kernel.

Object-oriented computerized modeling system

Computer system for portable persistent modeling

Growing community of inventors

West Chester, PA, United States of America

Earlin Lutz