Feature Faces
Feature Face – a two-dimensional spatial entity that defines a closed area in 2D or 3D space
- The shape of a face is defined by the edges that bound the face, as well as any nodes contained within the interior of the face – in 3D, a face need not be planar
- The orientation of a face is defined the order of the edges in its outer boundary (counterclockwise as seen from above)
A face is bounded by one or more ordered collections of edges, defining its outer boundary, and zero or more inner boundaries (i.e., “holes”)
Faces may meet only along common edges
- Face interiors may not intersect one another (Exception: Feature Topology Levels 0 through 2)