Constrained Surface
A constrained surface is a reference surface constrained by a cloud of points, normals and optional U′V′ parameters. Use a constrained surface as a reference to create windscreen layers and curved parameterised windscreen antenna elements.
Surface parameters (U′ and V′) define the outline and internal grid lines of a constrained surface.
The range of values assigned to the U′ or V′ grid lines only determine relative distances in the U′V′ space.