# \#geometry

**URL:** https://discourse.mcneel.com/tag/geometry/1057.md

[Latest](https://discourse.mcneel.com/latest.md) · [Categories](https://discourse.mcneel.com/categories.md) · [Tags](https://discourse.mcneel.com/tags.md)

---

## [CHAIN links along a curve](https://discourse.mcneel.com/t/chain-links-along-a-curve/223721)

<div class="topic-metadata">

**Author:** [@Dušan\_Amrich](https://discourse.mcneel.com/u/Du%C5%A1an_Amrich)\
**Replies:** 4\
**Last updated:** [October 20, 2026, 9:12am UTC](https://discourse.mcneel.com/t/chain-links-along-a-curve/223721 "2026-10-20T09:12:59Z")

</div>

Chain\_on\_Curve.3dm (37.6 KB) Chain\_on\_curve.gh (14.6 KB) Hi everyone, I am working on a Grasshopper definition where I need to create a dynamic chain along a curve. The chain needs to adapt if the curve changes. What…

---

## [PrismForge — generate editable Rhino geometry from a text prompt](https://discourse.mcneel.com/t/prismforge-generate-editable-rhino-geometry-from-a-text-prompt/219951)

<div class="topic-metadata">

**Author:** [@Vivek\_Trivedi](https://discourse.mcneel.com/u/Vivek_Trivedi)\
**Replies:** 0\
**Last updated:** [June 15, 2026, 2:50pm UTC](https://discourse.mcneel.com/t/prismforge-generate-editable-rhino-geometry-from-a-text-prompt/219951 "2026-06-15T14:50:21Z")

</div>

Hi all — I’ve been building PrismForge, a Rhino plugin that generates 3D geometry from a text prompt (or a reference image), directly inside Rhino. The reason I built it: most AI 3D tools hand you a dense mesh you can’…

---

## [Critical request for the "Project" command](https://discourse.mcneel.com/t/critical-request-for-the-project-command/210850)

<div class="topic-metadata">

**Author:** [@Rhino\_Bulgaria](https://discourse.mcneel.com/u/Rhino_Bulgaria)\
**Replies:** 17\
**Last updated:** [June 7, 2026, 5:22pm UTC](https://discourse.mcneel.com/t/critical-request-for-the-project-command/210850 "2026-06-07T17:22:04Z")

</div>

I had numerous cases where I lost important input curves after I projected them onto surfaces, due to the “DeleteInput=Yes” option being persistent across the Rhino sessions (Rhino 7). My suggestion is to either make tha…

---

## [Make a Wave Along a Curve](https://discourse.mcneel.com/t/make-a-wave-along-a-curve/217356)

<div class="topic-metadata">

**Author:** [@Hussain1](https://discourse.mcneel.com/u/Hussain1)\
**Replies:** 16\
**Last updated:** [March 26, 2026, 9:53pm UTC](https://discourse.mcneel.com/t/make-a-wave-along-a-curve/217356 "2026-03-26T21:53:11Z")

</div>

Hello, I have a funky 2D curve, shown below in an image I want to create a wave pattern along the edge of the curve, something like this: I have made an attempt on grasshopper to make something like this but its…

---

## [TryGetCone + TryGetCylinder Logic](https://discourse.mcneel.com/t/trygetcone-trygetcylinder-logic/216512)

<div class="topic-metadata">

**Author:** [@matthew\_conway](https://discourse.mcneel.com/u/matthew_conway)\
**Replies:** 1\
**Last updated:** [March 2, 2026, 3:55pm UTC](https://discourse.mcneel.com/t/trygetcone-trygetcylinder-logic/216512 "2026-03-02T15:55:34Z")

</div>

I’ve been using Surface.TryGetCone() and Surface.TryGetCylinder() successfully, but I was wondering if someone on the dev team could give some insight into how it is fitting? Does the surface UV directions matter (i.e. i…

---

## [Fast way to pipe polylines? (with varying radius)](https://discourse.mcneel.com/t/fast-way-to-pipe-polylines-with-varying-radius/216151)

<div class="topic-metadata">

**Author:** [@feklee](https://discourse.mcneel.com/u/feklee)\
**Replies:** 20\
**Last updated:** [February 27, 2026, 4:32am UTC](https://discourse.mcneel.com/t/fast-way-to-pipe-polylines-with-varying-radius/216151 "2026-02-27T04:32:29Z")

</div>

As part of creating trees, I have hundreds or maybe even thousands of polylines that I want to pipe. The radius varies along the polyline. I tried: Pipe Variable (VPipe): It doesn’t create continuous pipes when used w…

---

## [TryGetPlane fails unexpectedly](https://discourse.mcneel.com/t/trygetplane-fails-unexpectedly/216316)

<div class="topic-metadata">

**Author:** [@Russell\_Emerine](https://discourse.mcneel.com/u/Russell_Emerine)\
**Replies:** 12\
**Last updated:** [February 26, 2026, 5:29pm UTC](https://discourse.mcneel.com/t/trygetplane-fails-unexpectedly/216316 "2026-02-26T17:29:16Z")

</div>

I have the attached curve: badCurve.3dm (45.1 KB) and the following plugin command code: public class MyTryGetPlane : Command { public MyTryGetPlane() { Instance = this; } …

---

## [Fill gaps after solid creation](https://discourse.mcneel.com/t/fill-gaps-after-solid-creation/215885)

<div class="topic-metadata">

**Author:** [@Eirik\_Soland\_Thu](https://discourse.mcneel.com/u/Eirik_Soland_Thu)\
**Replies:** 8\
**Last updated:** [February 16, 2026, 8:00am UTC](https://discourse.mcneel.com/t/fill-gaps-after-solid-creation/215885 "2026-02-16T08:00:55Z")

</div>

I have many cases like this, which comes after creating solids by extruding selected faces in the normal direction. I am looking for a robust approach that can detect and fill the gaps that are left after creating the br…

---

## [Grasshopper opennest - help nesting without parts intersecting](https://discourse.mcneel.com/t/grasshopper-opennest-help-nesting-without-parts-intersecting/215524)

<div class="topic-metadata">

**Author:** [@ARTSEENALLIANCE](https://discourse.mcneel.com/u/ARTSEENALLIANCE)\
**Replies:** 2\
**Last updated:** [February 5, 2026, 10:42pm UTC](https://discourse.mcneel.com/t/grasshopper-opennest-help-nesting-without-parts-intersecting/215524 "2026-02-05T22:42:24Z")

</div>

Hey! First time reaching out for help here! I’m trying to nest around 1000 parts for plasma cut & engrave. I’m using OpenNest. Each part has a part number and (3) facets numbers for our welder to assemble the parts with…

---

## [Curved Bending of a Square Shaped Paper](https://discourse.mcneel.com/t/curved-bending-of-a-square-shaped-paper/215548)

<div class="topic-metadata">

**Author:** [@Namdev](https://discourse.mcneel.com/u/Namdev)\
**Replies:** 2\
**Last updated:** [February 5, 2026, 2:41pm UTC](https://discourse.mcneel.com/t/curved-bending-of-a-square-shaped-paper/215548 "2026-02-05T14:41:47Z")

</div>

Hi. I am trying to curve-bend a square shaped paper for a project using kangaroo physics. Unable to find good tutorials. I saw one by Gediminas Kirdeikis byt it is hard to understand how corner vertices can be folded wi…

---

## [Derive interior net CV from control points of four edge curves?](https://discourse.mcneel.com/t/derive-interior-net-cv-from-control-points-of-four-edge-curves/215112)

<div class="topic-metadata">

**Author:** [@ghalford1](https://discourse.mcneel.com/u/ghalford1)\
**Replies:** 7\
**Last updated:** [January 29, 2026, 3:33pm UTC](https://discourse.mcneel.com/t/derive-interior-net-cv-from-control-points-of-four-edge-curves/215112 "2026-01-29T15:33:23Z")

</div>

Apologies if I’m not stating this correctly. The image shows the control polygons of four edge curves used with edgesrf. I’m trying to figure out how Rhino computes the new interior CV that defines the net for the surfac…

---

## [Rhino 8 - Deletes geometry with backspace key](https://discourse.mcneel.com/t/rhino-8-deletes-geometry-with-backspace-key/180670)

<div class="topic-metadata">

**Author:** [@gszechter](https://discourse.mcneel.com/u/gszechter)\
**Replies:** 14\
**Last updated:** [December 16, 2025, 1:24pm UTC](https://discourse.mcneel.com/t/rhino-8-deletes-geometry-with-backspace-key/180670 "2025-12-16T13:24:19Z")

</div>

Hi all, When using the backspace key in Rhino 8 -sometimes- it deletes the selected geometry. This makes it very easy to accidentally delete geometry when erasing commands in the command line. Is this intentional or is…

---

## [Move circle along line until it touches another circle](https://discourse.mcneel.com/t/move-circle-along-line-until-it-touches-another-circle/206674)

<div class="topic-metadata">

**Author:** [@Davi\_Sales\_Barreira](https://discourse.mcneel.com/u/Davi_Sales_Barreira)\
**Replies:** 3\
**Last updated:** [July 2, 2025, 4:10pm UTC](https://discourse.mcneel.com/t/move-circle-along-line-until-it-touches-another-circle/206674 "2025-07-02T16:10:25Z")

</div>

I have two circles, and I want to move one of them along a certain direction until it hits the other one. Any ideas on how this could be done? Here is a picture of what I’m looking for. The circle on the top left has hav…

---

## [Discretizing Geometry Based on Point Clusters for Robotic Fabrication](https://discourse.mcneel.com/t/discretizing-geometry-based-on-point-clusters-for-robotic-fabrication/204930)

<div class="topic-metadata">

**Author:** [@Alejandra\_Rodriguez](https://discourse.mcneel.com/u/Alejandra_Rodriguez)\
**Replies:** 14\
**Last updated:** [June 11, 2025, 4:26pm UTC](https://discourse.mcneel.com/t/discretizing-geometry-based-on-point-clusters-for-robotic-fabrication/204930 "2025-06-11T16:26:42Z")

</div>

Hi everyone, I’m working on a project where I have a Brep, a set of points, and clusters of those points as inputs. My goal is to discretize the original geometry based on these clusters — each cluster will correspond t…

---

## [Move a list of points in a direction with Rhino.Geometry](https://discourse.mcneel.com/t/move-a-list-of-points-in-a-direction-with-rhino-geometry/204015)

<div class="topic-metadata">

**Author:** [@mehrzad\_samadi](https://discourse.mcneel.com/u/mehrzad_samadi)\
**Replies:** 2\
**Last updated:** [May 5, 2025, 5:32pm UTC](https://discourse.mcneel.com/t/move-a-list-of-points-in-a-direction-with-rhino-geometry/204015 "2025-05-05T17:32:09Z")

</div>

Hello everyone, There’s a problem I have in moving a list of points to a specific axis with or without pattern like sin or cos with Rhino.Geometry. I know that when we want to move other types of geometries, we go like: …

---

## [How do I create the said geometry in grasshopper, using the native tools?](https://discourse.mcneel.com/t/how-do-i-create-the-said-geometry-in-grasshopper-using-the-native-tools/193865)

<div class="topic-metadata">

**Author:** [@Soumitra\_Das](https://discourse.mcneel.com/u/Soumitra_Das)\
**Replies:** 3\
**Last updated:** [October 31, 2024, 9:13am UTC](https://discourse.mcneel.com/t/how-do-i-create-the-said-geometry-in-grasshopper-using-the-native-tools/193865 "2024-10-31T09:13:18Z")

</div>

I need to recreate a similar geometry for a jali pattern in my design. What is the most efficient way to do that in grasshopper with only the native grasshopper nodes?

---

## [NGON planer negative and positive geometry question?](https://discourse.mcneel.com/t/ngon-planer-negative-and-positive-geometry-question/188481)

<div class="topic-metadata">

**Author:** [@Puree\_Srisuk](https://discourse.mcneel.com/u/Puree_Srisuk)\
**Replies:** 0\
**Last updated:** [July 23, 2024, 3:24pm UTC](https://discourse.mcneel.com/t/ngon-planer-negative-and-positive-geometry-question/188481 "2024-07-23T15:24:09Z")

</div>

Hi, Could you please share how to implement the Ngon plugin geometry in the images?

---

## [Select unique cube configurations](https://discourse.mcneel.com/t/select-unique-cube-configurations/187683)

<div class="topic-metadata">

**Author:** [@Ruben\_Koopman](https://discourse.mcneel.com/u/Ruben_Koopman)\
**Replies:** 11\
**Last updated:** [July 11, 2024, 9:07am UTC](https://discourse.mcneel.com/t/select-unique-cube-configurations/187683 "2024-07-11T09:07:37Z")

</div>

I have made a cube from line components and rotated it in all directions keeping it orthogonal. This gives me 64 different orientations of the cube. How can I select only the unique orientations of the cube? I tried to s…

---

## [I can't cut it - BooleanDifference failure](https://discourse.mcneel.com/t/i-cant-cut-it-booleandifference-failure/177057)

<div class="topic-metadata">

**Author:** [@jmcauley](https://discourse.mcneel.com/u/jmcauley)\
**Replies:** 2\
**Last updated:** [March 2, 2024, 10:51pm UTC](https://discourse.mcneel.com/t/i-cant-cut-it-booleandifference-failure/177057 "2024-03-02T22:51:00Z")

</div>

I’m trying to boolean difference the red solid from the faceted torus and I’m having no luck… I have tried moving the two bits of geometry with respect to each other in case there is a problem with edges lining up exact…

---

## [New in Grasshopper - help with the pattern](https://discourse.mcneel.com/t/new-in-grasshopper-help-with-the-pattern/172147)

<div class="topic-metadata">

**Author:** [@Klemen](https://discourse.mcneel.com/u/Klemen)\
**Replies:** 15\
**Last updated:** [January 1, 2024, 9:25pm UTC](https://discourse.mcneel.com/t/new-in-grasshopper-help-with-the-pattern/172147 "2024-01-01T21:25:14Z")

</div>

Dear all, Hope you are all doing great. I am writing to the forum, as I am quite new to the Grasshopper software. I need a bit of technical help with my geometrical pattern for 2D CNC cutting/perforation. I would like…

---

## [Geometry that works properly on Rhino 5,6 got shifted on Rhino 8](https://discourse.mcneel.com/t/geometry-that-works-properly-on-rhino-5-6-got-shifted-on-rhino-8/172415)

<div class="topic-metadata">

**Author:** [@ivan\_poon](https://discourse.mcneel.com/u/ivan_poon)\
**Replies:** 5\
**Last updated:** [December 31, 2023, 6:05pm UTC](https://discourse.mcneel.com/t/geometry-that-works-properly-on-rhino-5-6-got-shifted-on-rhino-8/172415 "2023-12-31T18:05:37Z")

</div>

I have a geometry file that works properly on Rhino 5 and 6. \[In the file, the smaller square geometries, the number varies from 1 to 16, should lie on the plane in the middle\] However, when I open the file in Rhino 8, t…

---

## [BRepBuilder cannot assign edge geom & Method not found error](https://discourse.mcneel.com/t/brepbuilder-cannot-assign-edge-geom-method-not-found-error/167875)

<div class="topic-metadata">

**Author:** [@Benjamin\_Paolo\_Fortu](https://discourse.mcneel.com/u/Benjamin_Paolo_Fortu)\
**Replies:** 1\
**Last updated:** [October 25, 2023, 2:50pm UTC](https://discourse.mcneel.com/t/brepbuilder-cannot-assign-edge-geom-method-not-found-error/167875 "2023-10-25T14:50:12Z")

</div>

I’m having some issues with the latest version of Rhino8 with some relatively simple geometry. I stuck to all the best practices, set my unit tolerances, rebuiltedges on all the surfaces and checked for open edges. The g…

---

## [Vectors No Longer Considered Geometry?](https://discourse.mcneel.com/t/vectors-no-longer-considered-geometry/163842)

<div class="topic-metadata">

**Author:** [@michaelvollrath](https://discourse.mcneel.com/u/michaelvollrath)\
**Replies:** 0\
**Last updated:** [August 9, 2023, 3:35pm UTC](https://discourse.mcneel.com/t/vectors-no-longer-considered-geometry/163842 "2023-08-09T15:35:28Z")

</div>

Hello, Historically, I’ve enjoyed the fact that Vectors can be cast into geometry inputs of components. In the latest WIP build this is no longer the case as you can see here where I use a curve Tangent Vector to creat…

---

## [Dynamic ribbon band (se video reference)](https://discourse.mcneel.com/t/dynamic-ribbon-band-se-video-reference/163195)

<div class="topic-metadata">

**Author:** [@martinwalbo](https://discourse.mcneel.com/u/martinwalbo)\
**Replies:** 0\
**Last updated:** [July 24, 2023, 12:50pm UTC](https://discourse.mcneel.com/t/dynamic-ribbon-band-se-video-reference/163195 "2023-07-24T12:50:37Z")

</div>

Hello! Im looking for a way to recreate something like the effect shown in this video: Basically, I’m wondering how to make a script that can reproduce this kind of dynamic. A band that bends onto itself …

---

## [Compound Curves to Revit Native Geometry](https://discourse.mcneel.com/t/compound-curves-to-revit-native-geometry/161919)

<div class="topic-metadata">

**Author:** [@rismail88](https://discourse.mcneel.com/u/rismail88)\
**Replies:** 5\
**Last updated:** [June 23, 2023, 5:51pm UTC](https://discourse.mcneel.com/t/compound-curves-to-revit-native-geometry/161919 "2023-06-23T17:51:59Z")

</div>

Hi friends, I have this complex-shaped roof in Rhino and I am struggling to bring it into Revit as anything smarter and a mass or generic model. I know many threads on this, but none seem to work for this geometry. I w…

---

## [Suggested file format for storing quad mesh after QuadRemesh function](https://discourse.mcneel.com/t/suggested-file-format-for-storing-quad-mesh-after-quadremesh-function/161612)

<div class="topic-metadata">

**Author:** [@Aravind\_Karthik\_Mura](https://discourse.mcneel.com/u/Aravind_Karthik_Mura)\
**Replies:** 2\
**Last updated:** [June 22, 2023, 4:14pm UTC](https://discourse.mcneel.com/t/suggested-file-format-for-storing-quad-mesh-after-quadremesh-function/161612 "2023-06-22T16:14:04Z")

</div>

Hello community! I am trying to convert a NURBS body to all-quad body using the QuadRemesh functionality (for CFD applications). The objective is to do CFD meshing in Salome meshing tool. Post conversion, what is the su…

---

## [Shapediver endpoint for health check](https://discourse.mcneel.com/t/shapediver-endpoint-for-health-check/161212)

<div class="topic-metadata">

**Author:** [@Balazs\_Kisfali](https://discourse.mcneel.com/u/Balazs_Kisfali)\
**Replies:** 4\
**Last updated:** [June 9, 2023, 2:00pm UTC](https://discourse.mcneel.com/t/shapediver-endpoint-for-health-check/161212 "2023-06-09T14:00:22Z")

</div>

Is there an endpoint what we could call for health check of the Shapediver servers? Very simple one, just checking in if the server is up and running. …the reason for that is we need to provide uptime logs for our SLA a…

---

## [Voronoi on non rectangular surface](https://discourse.mcneel.com/t/voronoi-on-non-rectangular-surface/157564)

<div class="topic-metadata">

**Author:** [@student\_arch](https://discourse.mcneel.com/u/student_arch)\
**Replies:** 11\
**Last updated:** [April 4, 2023, 8:19am UTC](https://discourse.mcneel.com/t/voronoi-on-non-rectangular-surface/157564 "2023-04-04T08:19:27Z")

</div>

To whom this may concern, I am seeking help with setting my boundary or trim all the lines of the voronoi structure outside the curve setting my boundary to my geometry Desired Outcome Attached below offices.gh (11.…

---

## [HELP: contour a geometry](https://discourse.mcneel.com/t/help-contour-a-geometry/156050)

<div class="topic-metadata">

**Author:** [@Taynan\_Saquet](https://discourse.mcneel.com/u/Taynan_Saquet)\
**Replies:** 12\
**Last updated:** [March 8, 2023, 3:33pm UTC](https://discourse.mcneel.com/t/help-contour-a-geometry/156050 "2023-03-08T15:33:29Z")

</div>

I would like to contour this geometry, however I am unable to make the contour follow the curvature of the geometry (not being the X or Y axis). I think this is a simple problem to solve, but I can’t find the solution. …

---

## [Solid Perspective Grasshopper](https://discourse.mcneel.com/t/solid-perspective-grasshopper/154663)

<div class="topic-metadata">

**Author:** [@Giulio\_Cesare\_Giglio](https://discourse.mcneel.com/u/Giulio_Cesare_Giglio)\
**Replies:** 12\
**Last updated:** [February 12, 2023, 10:54am UTC](https://discourse.mcneel.com/t/solid-perspective-grasshopper/154663 "2023-02-12T10:54:40Z")

</div>

Hi everyone and thanks in advance for your help. I’m new in grasshopper, i just started to use it and I think that it’s a tool suitable for what I need. I read manuals and had a look at tutorials, but nothing seems to he…

[Next page](https://discourse.mcneel.com/tag/geometry/1057.md?match_all_tags=true&page=1&tags%5B%5D=geometry)