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NURBS tangent curves

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Is there a secret to making NURBS curves that are tangent arcs?


I'm not really clear what the NurbsSetKnot does and how it affects the vertices. 



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You can think of the knot as the point where the mathematical function defining the curve changes (that would be the non-uniform part of Non-Uniform Rational Basis Spline). 


I think your best option is to create the arc via a 2D arc method, and then convert to NURBS.

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Thanks, Josh.


Is there a way to ensure that two arcs or adjacent arc segments of a polyline are tangent?

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