I see many interesting solutions for creating spiral surfaces in Grasshopper …has anyone made an addon that mimics the rhino spiral tool…has the same parameters of start and end radius, number of turns, axis, along a curve…so that all I need in rhino is the start point and a line or curve to act as the axis and the other choices can be made in grasshopper with slides for all the values…maybe introduce an extra radius in between so that the spiral could have necks or bulges the way you can do with “pipe”. If there were two end points and a central point on a curve then I believe I could slide these about between 0 and 1 as the domain and apply radii with sliders to each point ( this is similar to the method for "pipe ) and then control the spiral. If any one has done this I would be grateful to know…I use a lot of spiral forms in metal using flats and rounds and drawing each one from scratch involves a lot of hit and miss so ngrasshopper would make this a lot more versatile thanks Giusseppe…metalgarden.ca

I don’t think there is a Rhinocommon function for that. I found that [image] writing a function, clothoid Hi there, I was wondering if I could get some help with this. I have the parametric formula of a clothoid: { Integrate[ Sin[(x^2)/2], {x,0,t}],Integ…

Basically, as soon as you find any parametric formula, you simple use the expression or evaluate component and type it in. You’ll get a list of points which then can be interpolated. The only drawback, the interpolated curve might not have the best curvature flow. So all you need to do is googling “euler spiral parametric equation”. Nurbs curves are parametric as well. Any Point on a NurbsCurve can be created by typing in any value for parameter t. If t is inside the curve domain, the point lays on the visible part. You can usually spot if a formula is parametric if its written like this: B(t) = …, where t is the parameter, can be another symbol as well (often u)…Surfaces usually have u and v.

Just wanted to thank you again Laurent….the spirale and makes it so easy to do something like this which used to be so hit and miss in the past. [image]

Thank you for the component, just use it yesterday with no problem.

Super cool component Laurent! I am trying to implement it into make custom screws for a 3d printed model. Brainstorming ideas on how to implement this to a custom form is giving me a nice brain challenge.

Screw components are there, many people improved it. Also for 3d printing [image] ISO screw thread Here are three grasshopper documents for generation thread screw ACME ISO screw thread external (male) and internal (female). One script for metric (mm) and… https://storage.ning.com/topology/rest/1.0/file/get/2654721992?profile=RESIZE_1024x1024 http://storage.ning.com/topology/rest/1.0/file/get/2769164000?profile=RESIZE_1024x1024 http://storage.ning.com/topology/rest/1.0/file/get/2769296173?profile=original

Spiral tool for grasshopper

Grasshopper

arsbenamar (Ars) April 30, 2019, 5:36pm 19

Hi Laurent, the gha file link is broken. Any chance you can repost it? Best

Yet Another Dotted Image Technique : Tangent On Curve Dotted Image

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Spiral tool for grasshopper

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