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SubDFriendlyKnotType Enumeration

ON_SubD::SubDFriendlyKnotType identifies the types of subd friendly NURBS knot vectors. SubD friendly NURBS curves and surfacaes are always cubic and nonrational. Any time there is a multiple knot, the 2nd derivative is zero at the corresponding parameter. SubD friendly NURBS curves are either periodic or have zero 2nd derivative at the ends.

Namespace:  Rhino.Geometry
Assembly:  RhinoCommon (in RhinoCommon.dll)
Syntax
public enum SubDFriendlyKnotType
Members
  Member nameValueDescription
Unset0 Not a valid type. Used to indicate the type has not been set and to encourage developers to explicitly specify a type.
UnclampedUniform1 NURBS knot vector is an unclamped uniform cubic knot vector. Every knot interval has the same length. Every knot has multiplicity 1.
ClampedUniform2 NURBS knot vector is a clamped uniform cubic knot vector. Every interior knot interval has the same length. End knots have multiplicity 3 and interior knots have multiplicity 1.
ClampedPiecewiseUniform4 NURBS knot vector is a clamped piecewise uniform cubic knot vector. All nonzero knot intervals have the same length. End knots have multiplicity 3 and interior knots have multiplicity 1 or 3. Interior knots with multiplicity 3 correspond to interior SubD creases.
Unfriendly127 NURBS knot vector is not subd friendly.
See Also