Hello, Anyone know how to get the points of maximum curvature for a curve? I can get the inflection points by making the angle diff between tangents, and next iterate the segments to get the max curvature for each segment but it doesn’t seem to be the most efficient technique. [image] Thanks and…

If you have a copy of the Rhino WIP, you might try Rhino.Geometry.Curve.ExtremeParameters.

Hi Dale, Thanks for your quick answer, as always! the point is I would like to do it for a Rhino 5 plugin. I guess I will have to do it by approach :slight_smile: Thank you anyway. Best regards

Hi, Is there a solid way that gets you the precise max / min points? I’ve been looking for online literature about it but haven’t found anything useful. At the moment I am iteratively sampling the curve’s domain, so it can take a while to get a reasonable result…

[image] tom_svilans: Is there a solid way that gets you the precise max / min points? There is a way - and we’ve added a method to RhinoCommon in the Rhino WIP to do this. Rhino.Geometry.Curve.ExtremeParameters

Hi dale, Thanks for that, I saw it mentioned somewhere else, but I’m not sure how to get the newer Rhinocommon? Is the WIP mature enough to switch over? Or is there a way to use the new Rhinocommon with Rhino 5? Much thanks! Tom Svilans, M. Arch. m: +44 (0)75 1926 0882 e: tom.svilans@gmail.co…

[image] tom_svilans: Is the WIP mature enough to switch over? Why don’t you ask those on Serengeti? Serengeti (Rhino 8 BETA) Serengeti, named after the largest African Savanna, is where Rhino grows. …

Ah, wasn’t aware of that. Cheers! Tom Svilans, M. Arch. m: +44 (0)75 1926 0882 e: tom.svilans@gmail.com w: tomsvilans.com ▶ ···

Hi there, Sorry for resurrecting that thread, but there’s still something I don’t get with the ‘ExtremeParameters’ method. What I want to achieve: get the curvature extremas parameters displayed by the ‘Curvature’ command (aka. max. curvature points, for both planar and 3D curves) into Rhinocommon…

Hi @jeffoulet [image] jeffoulet: What is that vector excatly for? The functions need to know what axis to calculate the extreme points. For example, with the original image, the axis would be the world x-axis. – Dale

Hi @dale , Thank you for the explanation but I still have the feeling to be off the track… Why does ‘ExtremeParameters’ require a direction vector as the Rhino ‘Curvature’ command is not prompting for anything? The curve’s local maximum curvature locations should be independent from any direction:…

Get curve maximum curvature points

Rhino Developer

dale (Dale Fugier) March 17, 2016, 4:39pm 7

Why don’t you ask those on Serengeti?

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Get curve maximum curvature points

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