IFC Syntax : Swept Solid Geometry

IFC carries most building geometry parametrically : a 2D cross-section (a profile) is swept through 3D space to form a solid. This skill covers the swept-solid entities, their attributes, their WHERE rules, and how the result maps to a shape representation.

Applies to IFC2x3, IFC4, and IFC4.3. The directrix family was restructured across versions : see Version Differences.

Quick Reference

The swept-solid idea

A swept solid pairs a profile with a sweep operation. The profile is the cross-section ; the sweep moves it. The profile entities (IfcProfileDef and its subtypes) are covered by ifc-syntax-geometry-profiles ; this skill covers the sweep.