SubDFriendlyKnotType

SubDFriendlyKnotType enum

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.

Derived Classes:

Namespace: Rhino.Geometry
SubDFriendlyKnotType: references

Values (5)

Unset = 0

Not a valid type. Used to indicate the type has not been set and to encourage developers to explicitly specify a type.

UnclampedUniform = 1

NURBS knot vector is an unclamped uniform cubic knot vector. Every knot interval has the same length. Every knot has multiplicity 1.

ClampedUniform = 2

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.

ClampedPiecewiseUniform = 4

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.

Unfriendly = 127

NURBS knot vector is not subd friendly.

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