Insert Surface Spined

The Spined Surface command enables you to create a surface by moving one or more boundary curves along one or two drive curves, and controlling its shape by means of an auxiliary curve, called a spine. The spine and one of the two drive curves may be the same curve. The drive curves or spine may be curve chains with tangency continuity, or may be profiles.

The drive curves determine the path that you want the boundary curve or curves to follow in order to create the surface.

The spine curve, on the other hand, determines the plane to which the plane sections interpolated by the final surface belong at each point. In other words, at each point on the spine curve, the section normal to the final surface lies in the plane normal to the spine curve (as defined by the normal and binormal to the spine at each point).

Therefore, the following conditions must be met:

• The placement plane of the boundary curve must be orthogonal to the spine.
• The placement plane of the boundary curve (and of the drive curves, if any) must intersect at a point.

Both of these conditions can be obtained automatically starting with any curve by using the Spined Curve command described in relation to curves.

Try to ...

• Create a Spined Surface from one boundary and one drive
• Create a Spined Surface from more than two boundaries
• Create a Spined Surface from two boundaries and two drives

Ticks and Trips

• Setting the number of resulting surfaces
• Setting the Orientation of a Spined Surface
• Varying the Section of a Spined Surface
• Blending on multiple boundaries surfaces
• Setting the scaling along two drives