- property FacePrimitive.normal¶
Limitations: #. The face must be planar. #. Currently it works only if the face has at least two vertices. Notable excluded items are circles and ellipses that have only one vertex. #. If a bounding box is specified, the normal is orientated outwards with respect to the bounding box. Usually the bounding box refers to a volume where the face lies. If no bounding box is specified, the normal can be inward or outward the volume.