Is there any way I can retrieve the control points/polygon from a B-Spline (calculated from Dierckx.jl or Interpolations.jl)? Control points as described here and shown as the black polygon here: [image] For instance, in the following MWE, how would I get the control polygon of the following spli…

[image] yakir12: control points/polygon: a bunch of straight lines that have some relation to the resulting spline. I think you are confusing B-splines with Bezier curves, they are different things. Also, generally for B-splines, no “polygon” drawn, say, tangentially at various points would …

Control points from a B-Spline

Specific Domains Numerics

Tamas_Papp October 9, 2019, 11:11am 14

You could calculate the second derivative of the spline approximation at various points in that section. It is easy with B-splines (but make sure you use at least cubic).

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Control points from a B-Spline

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