Defining a Conic Surface
There are two types of conic surfaces listed in the OPTIONS menu:
• Shouldr Crv—The surface passes through the control curve. The control curve defines the location of conic shoulders for each cross section of the surface.
• Tangent Crv—The surface does not pass through the control curve. The control curve defines the line that passes through the intersections of the conic sections’ asymptotes.
Rules for selecting curves or edges:
• Only single-segment composite curves can be selected as boundary or control curves.
• When selecting curves or edges with the Chain option, the chain cannot have more than one edge/curve component.