Target Shape

Using the Advanced Surface Continuity command, Continuity constraints can be applied to match a curve or a target shape. The Mode drop-down list has the following two options.

Curves	-	The continuity constraint is maintained between selected curves.
Shape	-	The continuity constraint is maintained between the selected curves and a shape. The shape can be a user defined or an automatic one depending on the constraint selected in the Continuity drop-down list. It is displayed in the Graphics Area as a mini-dialog box over the boundary curves to be modified. Some additional selectors can be displayed in the selection list depending on the type of selected constraint. The various available constraints in the Continuity drop-down list are: Target Plane The selected boundaries are mapped to a user defined plane. The target plane has to be selected for the Reference Plane selector. Target Line The selected boundaries are mapped to a user defined line. Target line has to be selected for the Reference Line selector. Target plane + symmetry The selected boundaries are mapped to a user defined plane while maintaining G2 symmetry along the boundary. Hence, the resulting surface and its mirrored copy with respect to the plane will be G2 continuous. The target plane has to be selected for the Reference Plane selector. Keep position + make symmetric Existing planar (boundary) curves keep their position while obtaining the G2 symmetry along the boundary Keep plane + make symmetric Existing planar (boundary) curves are "allowed" to move in its plane while obtaining the G2 symmetry along the boundary Match Plane The selected boundaries are mapped to a plane Match Sphere The selected boundaries are mapped to a sphere Match Cylinder The selected boundaries are mapped to a cylinder

Note For Match Plane, Match Sphere, and Match Cylinder the characteristics of the surfaces are internally computed and not defined by the user. The preview of the matching plane, sphere, or cylinder is displayed on selecting the button.