Extracting STEP Geometry and Topology from a Solid Modeler: Parasolid-to-STEP

Published

June 1, 1991

Author(s)

Thomas R. Kramer

Abstract

Parasolid is a commercial solid modeling software system. It uses a manifold boundary representation. STEP (STandard for the Exchange of Product model data) is an emerging international standard. Included in STEP are proposed standards for Topology and Geometry (which provide the definitions of data types required for building boundary representations) and for physical files representing products. Parasolid-to-STEP is a software system written in the C Programming language for translating a Parasolid format boundary representation file giving the shape of an object into a STEP format file describing the same shape. The system handles elementary curves (line, circle, ellipse) and surfaces (plane, sphere, cylinder, cone, torus).

Citation

NIST Interagency/Internal Report (NISTIR) - 4577

Report Number

4577

NIST Pub Series

NIST Interagency/Internal Report (NISTIR)

Pub Type

NIST Pubs

Download Paper

https://doi.org/10.6028/NIST.IR.4577

Keywords

STEP, product model data, modeling software

Citation

Kramer, T. (1991), Extracting STEP Geometry and Topology from a Solid Modeler: Parasolid-to-STEP, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.IR.4577 (Accessed October 17, 2025)