Does anyone know why evaluating a curve at 0.5 might return a different point than the CurveMiddle component? I’m stumped. I have a polycurve (an arc with a short tangent line at either end) that is created inside a Python component, and I get different results when evaluating at 0.5 or using Curve…

Midpoint Confusion Edited v0.gh (13.0 KB) I also like to know the reason. Group 1 is the same, and 2 is not. I guess it is related to the uneven curve domain. If so I like to ask if there is a way to visualize the unevenness of the curve domain. [image]

I think the following link may be helpful. [image] What is different between curve length and curve domain? Grasshopper [image] Nurbs Curve Domain Grasshopper These blog posts from Mr Rutten explain curve domains. They are well worth a read…

Yes, aside from very particlar cases parameter space has nothing to do with length ratio. Curve Middle, Point on Curve at 0.5 (that one is confusing so I don’t use it anymore) or Evaluate Length at 0.5 with Normalized = True will all give the same result. Evaluate Curve at 0.5 will not.

Wow, consider me gobsmacked. Now that I understand (well, mostly :-)) it all makes perfect sense, but it also means that many of my Grasshopper scripts over many years contain potential inaccuracies. It was blind luck that I found this one. Smuckers. (A brand of jams and jellies in the US, and als…

Try using divide curve, 2 for the input in the middle characteristic bottom input is for knot curve point division set. Lists the item.

Curve midpoint confusion

Grasshopper

11159 (Masaki) June 29, 2023, 2:42am 3

I think the following link may be helpful.

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Curve midpoint confusion

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