[SPiral 02] Spiral inside loft.gh (81.3 KB) Hey guys, Tried looking for a thread that solves this problem but couldn’t find it. I’m trying to design a tapering spiral surface with a fixed pitch that fit within the boundary of the loft.(which is sweeped to form a closed boundary) Alternatively,…

Anemone loop. Works great. :sunglasses: Controls: (blue group) Precision (size of increments) Gap (between disks) %Radius (of circles as fraction of ramp width/2, 0 to 1) RevSrf preview off (yellow group) [spiral_inside_revSrf_Circles__2023Feb11a] Click image below twice to see GH ca…

[image] Logarithmic Spiral Along Truncated Cone Grasshopper ‘riser’ and ‘tread’ sliders in blue group: [Spiral_Stair_Cone_2019Nov16a] Spiral_Stair_Cone_2019Nov16a.gh (12.6 KB) Refinements including treads and risers: [Spiral_Stair_Cone_2019Nov16b] Spiral_Stair_Cone_…

I would first of all orient the geometries on the origin instead of using an additional circular curve elsewhere. [image] Use a python script to create a cylindrical spiral and the Sporph component to morph it from a reference cylinder to your revolved surfaces. [image] spiral_inside_revolutio…

Thanks for the Script, However this still does not give me control over the overall profile on the boundary. Ideally I’d like to control the curvature of the boundary. [image] Also the height needs a constant parameter.

Thank you Joseph, I’m facing a similar problem with this script as well where i’m not able to manipulate the profile of the inner cone. I would also need to control the outer boundary. I tried pull to srf. But it’s not accurate. The global bending of the spiral is lost when I do that. [Screen Shot…

Yes, it’s unfortunate that a center point is not defined and the two curves are not parametric. I replaced loft/sweep with RevSrf (yellow group). I adapted code from the first link I posted. The ramp shown is the maximum slope allowed by ADA standards. The ‘Rise’ and ‘Run’ numbers also affect th…

Some dimensions: [image] You can simply drag control points in Rhino to change the profile of the two coned surfaces… spiral_inside_revolution.gh (10.9 KB)

Thanks Martin! This solves the problem. Additionally I’m trying to add circles to the surface without intersecting. I tried to unroll the surface to get a strip and then populate with reducing diameter and flow alongsrf. But it doesnt seem to work. spiral_inside_revolution_Circles_01.gh (21.6 KB) …

[image] AM FFS_: Is there a better way to do this? Yes, I think so. The lines you were using were not “square” to the midline of the ramp so I re-wrote your purple group, making circles using surface frames so they are “flat” on the ramp. Then I extruded them and used them to cut holes in t…

Srf CP to get uv for Isotrim. That’s smart! Learned another new thing haha! It’s definitely version b that’s what I want. But I want to populate as many circles as possible using the max width of the ramp without intersecting. It’s in a way similar to Doyle spiral. Does that make sense? I adjusted…

Interesting approach and in contrast to my sporphed spiral the slope remains constant, right? I guess there’s a choice between fixed pitch and constant slope. [image]

Spiral within a Lofted sweep surface

Grasshopper

Joseph_Oster February 8, 2023, 10:26am 2

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Spiral within a Lofted sweep surface

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