This option allows obtaining the curves that bound the selected surfaces (multiple surfaces and objects may be selected). After selecting the surfaces to be considered, the corresponding curves appear as selectable curves to be added.

  • If no curves are selected, all the curves are added to the geometry.
Figure 1. Extraction of all the curves from a cross primitive

  • If one or more curves are selected, only the selection is added to the geometry. Multiple curves may be selected by using the Ctrl-Key and the Left-Mouse button.
Figure 2. Selection of the outer curves from a cross primitive to be extracted