Controlling curve with help of control points in grasshopper

[omkarkharangkar]

I have been trying to control my curve in rhino with help of the grasshopper program using control points. The problem I am facing is when I select the curve and extract its control points in grasshopper, the command box shows 11 control points whereas my curve actually has only 8 control points. How can I resolve this?

[Mahdiyar]

I guess you’re looking for Control Polygon.
Every periodic d^n curve has n number of duplicate points.

Rebuild Crv creating duplicate points - SOLVED, sorta

A periodic curve is basically a curve that has the first d and last d control points (where d is the degree of the curve) the same, together with a non-clamped knot vector. In Rhino though, you see the duplicate control points as single control points, which makes it easier for the user to manipulate periodic curves. This in contrast to closed and open curves, that have a clamped knot vector. This means that the first and last control point are also the start and end of the curve, respectively.…