\param theShape - shape to detect affected elements (element which geometric center
located on or inside shape). If the shape is null, detection is done on faces orientations
(select elements with a gravity center on the side given by faces normals).
\param theShape - shape to detect affected elements (element which geometric center
located on or inside shape). If the shape is null, detection is done on faces orientations
(select elements with a gravity center on the side given by faces normals).