US 5,859,786 A · Process for computer-aided geometry modeling

Abstract

A process and system for the computer-aided geometry modeling which makes possible a declarative, sequence-independent description of geometric shapes and geometric features and leads to an integrated modeling, which unites in itself geometric relationships and connects them with non-geometric information. To achieve this, the geometry-related information is represented in the form of a representation element, to which a density (.rho.) is assigned in the form of a real number. The linking of individual representation elements is performed by a single commutative and associative linking operation. A volume level, a topology level, and a generic area and edge level located between these levels are provided as the description levels for the actually relevant information. A feature level, at which features are defined and at which a knowledge-based system can be used, is located above these description levels.

Claims17

Dependent claims

A process for the computer-aided geometry modeling of a workpiece, comprising the steps of:

providing an integrated, declarative, sequence-independent and logic-based representation of the volume, area, edge, point and topology-related information in the form of a representation element (.GAMMA.), comprising individual basic volumes, to which a density (.rho.) is assigned in the form of a real number (positive, zero, negative);
performing a linking of individual representation elements (.GAMMA.) by a commutative and associative linking operation;
and
creating description levels for the actually relevant information, also in their mutual dependence, in the form of a
volume level as the basic level for the description of elementary structures, whose composition is permanently preset,
topology level as a representation of the overall geometry, and
a generic area level located between the volume level and the topology level, and a generic edge level likewise located there for establishing the relationship between the topological structures and the volumes generating them.

4 more elements

A system for the computer-aided geometry modeling of a workpiece, comprising the steps of:

means for providing an integrated, declarative, sequence-independent and logic-based representation of the volume, area, edge, point and topology-related information in the form of a representation element (.GAMMA.), comprising individual basic volumes, to which a density (.rho.) is assigned in the form of a real number (positive, zero, negative);
means for performing a linking of individual representation elements (.GAMMA.) by a commutative and associative linking operation;
and
means for creating description levels for the actually relevant information, also in their mutual dependence, in the form of a
volume level as the basic level for the description of elementary structures, whose composition is permanently preset,
topology level as a representation of the overall geometry, and a generic area level located between the volume level and the topology level,
and a generic edge level likewise located there for establishing the relationship between the topological structures and the volumes generating them.

4 more elements

Dependencies are inferred from the claim text.

Process for computer-aided geometry modeling

Life of this patent

Process for computer-aided geometry modeling

Life of this patent

Abstract

Claims17