The OdGiGeometrySimplifier class (in Teigha examples/extensions source code) is frequently used inside a geometry conveyor to transform Gi geometry primitives into simpler forms. For example, polygons can be simplified into a set of triangles; text can be simplified into a set of triangles and polylines, and so on. The simplification method for each kind of geometry primitive after simplification calls virtual methods for a simpler level of geometry.
Working with .sat and .sab Files in Teigha
Teigha uses .sat and .sab files to define 3D geometry of 3D entities (OdDbRegion, OdDbBody, OdDb3dSolid, OdDbSurface, etc.).
Part References Overview
Part references are used to pick any geometry and mark it as a part. The referenced part will have a special behavior that allows it to interact with Bill Of Materials and allows it to be included in other drawings or assemblies through xreferences.