# \#intersection

**URL:** https://discourse.mcneel.com/tag/intersection/53.md

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## [The phantom four Points](https://discourse.mcneel.com/t/the-phantom-four-points/223466)

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**Author:** [@clivecarter](https://discourse.mcneel.com/u/clivecarter)\
**Replies:** 2\
**Last updated:** [October 11, 2026, 9:44am UTC](https://discourse.mcneel.com/t/the-phantom-four-points/223466 "2026-10-11T09:44:31Z")

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Around the wall of a cyliner, I’m seeking to generate six points (only) via intersecting six lines that radiate from the center axis (red box). However, an extra four points appear that are unwanted. These match up …

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## [Mesh intersection commands less robust](https://discourse.mcneel.com/t/mesh-intersection-commands-less-robust/106184)

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**Author:** [@jobasic](https://discourse.mcneel.com/u/jobasic)\
**Replies:** 2\
**Last updated:** [August 12, 2026, 9:39pm UTC](https://discourse.mcneel.com/t/mesh-intersection-commands-less-robust/106184 "2026-08-12T21:39:15Z")

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I tried to split two simple meshes below with each other using MeshSplit command, but many intersections are missed. Most of them are when edges of the cutting mesh are overlapping triangles of to-be-cut mesh. V6 finds d…

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## [Issue with Brep/plane intersection and contour: nonplanar curve outputs](https://discourse.mcneel.com/t/issue-with-brep-plane-intersection-and-contour-nonplanar-curve-outputs/218915)

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**Author:** [@Elena\_Vazquez\_Peña](https://discourse.mcneel.com/u/Elena_Vazquez_Pe%C3%B1a)\
**Replies:** 1\
**Last updated:** [May 11, 2026, 5:38pm UTC](https://discourse.mcneel.com/t/issue-with-brep-plane-intersection-and-contour-nonplanar-curve-outputs/218915 "2026-05-11T17:38:56Z")

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Hi, I am having weird results in a brep/plane intersection and with contour in GH. I also tried contour (in Rhino) and got similar results: nonplanar curve outputs in the top and bottom: Any ideas why this is happe…

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## [Surface intersection not found](https://discourse.mcneel.com/t/surface-intersection-not-found/218358)

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**Author:** [@laborda](https://discourse.mcneel.com/u/laborda)\
**Replies:** 3\
**Last updated:** [April 24, 2026, 2:46pm UTC](https://discourse.mcneel.com/t/surface-intersection-not-found/218358 "2026-04-24T14:46:57Z")

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Hi All, Today I’m having an issue with a pair of surfaces that intersect, but the \_Intersect command can’t find the curve. Can someone tell me what is happening? I tried with V9 and 8. Intersection Issue\_260424.3dm …

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## [How to create a sharp edge at the intersection of two surfaces?](https://discourse.mcneel.com/t/how-to-create-a-sharp-edge-at-the-intersection-of-two-surfaces/216823)

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**Author:** [@Ercument\_Talha\_Tayfu](https://discourse.mcneel.com/u/Ercument_Talha_Tayfu)\
**Replies:** 2\
**Last updated:** [March 10, 2026, 9:37pm UTC](https://discourse.mcneel.com/t/how-to-create-a-sharp-edge-at-the-intersection-of-two-surfaces/216823 "2026-03-10T21:37:10Z")

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Hello, I am currently modeling the object shown in Image 3. I am having difficulty creating the sharp transition at the intersection between the blue bottom surface and the wavy surface coming from the to…

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## [Trim (original) face/surface with modified brep, to get new trimmed face](https://discourse.mcneel.com/t/trim-original-face-surface-with-modified-brep-to-get-new-trimmed-face/216349)

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**Author:** [@Eirik\_Soland\_Thu](https://discourse.mcneel.com/u/Eirik_Soland_Thu)\
**Replies:** 4\
**Last updated:** [February 27, 2026, 8:16am UTC](https://discourse.mcneel.com/t/trim-original-face-surface-with-modified-brep-to-get-new-trimmed-face/216349 "2026-02-27T08:16:34Z")

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trim.gh (10.1 KB) I can’t seem to get this right, but maybe some of you have the answer. I have my orginial face that was used to create a brep by offsetting the face. After numerous boolean operations, the brep has in …

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## [MESH MESH INTERSECTIONS FASTER parallel](https://discourse.mcneel.com/t/mesh-mesh-intersections-faster-parallel/144289)

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**Author:** [@Othmane](https://discourse.mcneel.com/u/Othmane)\
**Replies:** 19\
**Last updated:** [February 25, 2026, 12:20pm UTC](https://discourse.mcneel.com/t/mesh-mesh-intersections-faster-parallel/144289 "2026-02-25T12:20:39Z")

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Hi to all is there a way to make MESH | MESH INTERSECTION faster or parallel ? meshmesh intersection.gh (6.8 KB)

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## [Srf | Srf Intersection not working](https://discourse.mcneel.com/t/srf-srf-intersection-not-working/216079)

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**Author:** [@Diana\_White](https://discourse.mcneel.com/u/Diana_White)\
**Replies:** 3\
**Last updated:** [February 18, 2026, 1:42pm UTC](https://discourse.mcneel.com/t/srf-srf-intersection-not-working/216079 "2026-02-18T13:42:44Z")

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Hello, Im creating an intersection of 2 srfs and I have tried all advices from the forum and AI chatbots and still the intersection is not working :frowning: Any idea for the solution? Thank you very much in advance! …

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## [Shatter Component Issue](https://discourse.mcneel.com/t/shatter-component-issue/159390)

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**Author:** [@Samet\_Yavuz](https://discourse.mcneel.com/u/Samet_Yavuz)\
**Replies:** 11\
**Last updated:** [October 1, 2025, 8:24am UTC](https://discourse.mcneel.com/t/shatter-component-issue/159390 "2025-10-01T08:24:36Z")

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Hi There! I’m trying to split my horizontal lines by transverse profile curves. But whatever i do it never worked. It always splitting irrelevant locations. Fırst i found intersections then I try to split. In Rhinoceros…

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## [Cut Intersection](https://discourse.mcneel.com/t/cut-intersection/155510)

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**Author:** [@Rodrigo\_Gomez](https://discourse.mcneel.com/u/Rodrigo_Gomez)\
**Replies:** 3\
**Last updated:** [September 26, 2025, 2:22pm UTC](https://discourse.mcneel.com/t/cut-intersection/155510 "2025-09-26T14:22:18Z")

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Hi! I’m pretty new to Rhino and Ghp and I was doing a pavilion where the walls are based by a Mobius Strip, and I was wondering if anyone knew how can I boolean this intersection so my wall will cut where it intersects w…

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## [Line - trimmed surface intersection with python](https://discourse.mcneel.com/t/line-trimmed-surface-intersection-with-python/209945)

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**Author:** [@revink](https://discourse.mcneel.com/u/revink)\
**Replies:** 1\
**Last updated:** [September 19, 2025, 10:46am UTC](https://discourse.mcneel.com/t/line-trimmed-surface-intersection-with-python/209945 "2025-09-19T10:46:27Z")

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hi, I am trying to get the intersection of a series of lines to a few surfaces (see example and image attached). However these surfaces have been trimmed, when I check for the intersection I get also the intersections to…

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## [Fast multiple solid intersections](https://discourse.mcneel.com/t/fast-multiple-solid-intersections/201488)

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**Author:** [@Filipe\_Belga](https://discourse.mcneel.com/u/Filipe_Belga)\
**Replies:** 21\
**Last updated:** [March 25, 2025, 7:00pm UTC](https://discourse.mcneel.com/t/fast-multiple-solid-intersections/201488 "2025-03-25T19:00:25Z")

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Hi, I have two sets of entities. Set A has 1 entity, typically larger than the rest in volume. Set B may or may not have more than one entity and may or may not be continuous (i.e., not a single entity, as shown in the …

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## [Understanding the Surface | Line Component](https://discourse.mcneel.com/t/understanding-the-surface-line-component/201652)

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**Author:** [@Alessandro\_Barbisan](https://discourse.mcneel.com/u/Alessandro_Barbisan)\
**Replies:** 5\
**Last updated:** [March 20, 2025, 11:18am UTC](https://discourse.mcneel.com/t/understanding-the-surface-line-component/201652 "2025-03-20T11:18:43Z")

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Good morning everyone, I’d like to understand how the “Surface | Line” component works because it’s not giving me the expected results. Maybe I’m doing something wrong, and that’s why I’m writing this post. Basically, …

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## [Rebuilding curves by intersection points](https://discourse.mcneel.com/t/rebuilding-curves-by-intersection-points/201482)

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**Author:** [@Renske](https://discourse.mcneel.com/u/Renske)\
**Replies:** 1\
**Last updated:** [March 18, 2025, 6:42am UTC](https://discourse.mcneel.com/t/rebuilding-curves-by-intersection-points/201482 "2025-03-18T06:42:43Z")

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Hello, I am trying to rebuild a set of curves based on the intersection points between each curve. I have a data tree with two branches, both corresponding to a layer of the structure I am creating. I have created the st…

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## [Fast MeshMesh intersection](https://discourse.mcneel.com/t/fast-meshmesh-intersection/201148)

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**Author:** [@maje90](https://discourse.mcneel.com/u/maje90)\
**Replies:** 8\
**Last updated:** [March 12, 2025, 4:52pm UTC](https://discourse.mcneel.com/t/fast-meshmesh-intersection/201148 "2025-03-12T16:52:55Z")

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Hi all. Rhino 7. I’m doing hundreds of Mesh-Mesh intersections to find quickly collisions/clashes… I’m using MeshMeshFast() method, but i’m getting a: Rhino.Geometry.Intersect.Intersection.MeshMeshFast(Rhino.Geometr…

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## [Accurate Beam connections - workflow suggestions](https://discourse.mcneel.com/t/accurate-beam-connections-workflow-suggestions/111625)

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**Author:** [@zabrielza](https://discourse.mcneel.com/u/zabrielza)\
**Replies:** 9\
**Last updated:** [January 15, 2025, 2:39pm UTC](https://discourse.mcneel.com/t/accurate-beam-connections-workflow-suggestions/111625 "2025-01-15T14:39:08Z")

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Hello, I am an architect and new in visualarq and BIM. I would like to ask, how can we have accurate (mm wise) intersections with visualarq beams, columns etc? I am not talking about modelling accurately from scratch bu…

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## [Plane | Curve gives unexpected additional points](https://discourse.mcneel.com/t/plane-curve-gives-unexpected-additional-points/196609)

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**Author:** [@Huy\_Vu](https://discourse.mcneel.com/u/Huy_Vu)\
**Replies:** 2\
**Last updated:** [December 16, 2024, 10:32am UTC](https://discourse.mcneel.com/t/plane-curve-gives-unexpected-additional-points/196609 "2024-12-16T10:32:01Z")

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Hi, please let me ask this very dumb question. I dont know why the Plane|Curve component gave me 24 output points from only 22 input points. Can not understand where the additional points come from? Thanks, PCX.gh (…

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## [Intersect Fail on Saddle Shape](https://discourse.mcneel.com/t/intersect-fail-on-saddle-shape/196063)

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**Author:** [@Measure](https://discourse.mcneel.com/u/Measure)\
**Replies:** 4\
**Last updated:** [December 5, 2024, 10:46pm UTC](https://discourse.mcneel.com/t/intersect-fail-on-saddle-shape/196063 "2024-12-05T22:46:13Z")

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Trying to trim a cylinder with this saddle shape with circular arc cross sections. Trim, Split, Intersect all fail. Saddle Trim.3dm (128.8 KB)

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## [Mesh Difference Issues: Cutting a Mesh with Another Mesh](https://discourse.mcneel.com/t/mesh-difference-issues-cutting-a-mesh-with-another-mesh/195209)

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**Author:** [@IliSam](https://discourse.mcneel.com/u/IliSam)\
**Replies:** 3\
**Last updated:** [November 20, 2024, 12:18pm UTC](https://discourse.mcneel.com/t/mesh-difference-issues-cutting-a-mesh-with-another-mesh/195209 "2024-11-20T12:18:19Z")

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Hi everyone, I’m facing an issue while trying to use Mesh Difference to cut one mesh with another. The problem arises when some faces of the cutting mesh lie exactly on the surface of the target mesh. This seems to caus…

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## [Curves intersection](https://discourse.mcneel.com/t/curves-intersection/193195)

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**Author:** [@Nguyen\_Vu\_Nam\_Chien](https://discourse.mcneel.com/u/Nguyen_Vu_Nam_Chien)\
**Replies:** 1\
**Last updated:** [October 17, 2024, 8:40am UTC](https://discourse.mcneel.com/t/curves-intersection/193195 "2024-10-17T08:40:16Z")

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Hello, I’m having a problem when using component Curve|Curve (curves intersection in GH). It works with separate branch like: Tree 1: {0;0},{0;1},{0;2} Tree 2: {0} But not work with whole branches: Tree 1: {0;0}…

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## [Wish: Intersect two sets with layers](https://discourse.mcneel.com/t/wish-intersect-two-sets-with-layers/46786)

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**Author:** [@Bogdan\_Chipara](https://discourse.mcneel.com/u/Bogdan_Chipara)\
**Replies:** 11\
**Last updated:** [September 9, 2024, 6:00pm UTC](https://discourse.mcneel.com/t/wish-intersect-two-sets-with-layers/46786 "2024-09-09T18:00:02Z")

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It would be useful if we could choose to inherit the layers for the resulting intersections from either the first or the second set.

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## [Intersection BrepBrep does not work](https://discourse.mcneel.com/t/intersection-brepbrep-does-not-work/189711)

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**Author:** [@janotaondrej91](https://discourse.mcneel.com/u/janotaondrej91)\
**Replies:** 2\
**Last updated:** [August 19, 2024, 7:58am UTC](https://discourse.mcneel.com/t/intersection-brepbrep-does-not-work/189711 "2024-08-19T07:58:25Z")

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Hello dear Grasshopper and Rhino users, I have the run into following issues. There are two breps which are result of some previous workflow. My goal is to cut one of the brep with second one. Breps clearly intersect ea…

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## [Trim with Plan and Solid Intersection](https://discourse.mcneel.com/t/trim-with-plan-and-solid-intersection/189522)

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**Author:** [@arc.mj92](https://discourse.mcneel.com/u/arc.mj92)\
**Replies:** 0\
**Last updated:** [August 14, 2024, 10:45am UTC](https://discourse.mcneel.com/t/trim-with-plan-and-solid-intersection/189522 "2024-08-14T10:45:05Z")

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Hi everyone, I hope you are fine. I have a problem in Solid Intersection. I have some polygonal cells (closed breps) and want to trim them with the planes that are co-planar with the cells’ inner surfaces. The output f…

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## [Controlling Waffle Structure Intersection Lengths?](https://discourse.mcneel.com/t/controlling-waffle-structure-intersection-lengths/186185)

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**Author:** [@kip\_jarrett](https://discourse.mcneel.com/u/kip_jarrett)\
**Replies:** 8\
**Last updated:** [July 2, 2024, 9:49pm UTC](https://discourse.mcneel.com/t/controlling-waffle-structure-intersection-lengths/186185 "2024-07-02T21:49:49Z")

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Hi everyone, As the title suggests I was wondering if there is a way in Grasshopper to control the amount of intersection happening in a friction fit waffle structure (finger joint/lap joints). As shown here in …

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## [How to find intersection points between a circle (curve) and a polyline](https://discourse.mcneel.com/t/how-to-find-intersection-points-between-a-circle-curve-and-a-polyline/184763)

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**Author:** [@Olivia\_Gragnon](https://discourse.mcneel.com/u/Olivia_Gragnon)\
**Replies:** 3\
**Last updated:** [June 18, 2024, 3:16pm UTC](https://discourse.mcneel.com/t/how-to-find-intersection-points-between-a-circle-curve-and-a-polyline/184763 "2024-06-18T15:16:15Z")

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Hi, I am pretty new to Grasshopper and I am trying to write a script to place lifting points on a CLT panel. I have drawn a circle with the object’s COG as center of my circle, and I have offset the boundary of my Tekl…

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## [Need Assistant - How to create unfolded Cut Section](https://discourse.mcneel.com/t/need-assistant-how-to-create-unfolded-cut-section/183592)

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**Author:** [@\_Rhino\_User](https://discourse.mcneel.com/u/_Rhino_User)\
**Replies:** 2\
**Last updated:** [June 17, 2024, 4:42pm UTC](https://discourse.mcneel.com/t/need-assistant-how-to-create-unfolded-cut-section/183592 "2024-06-17T16:42:41Z")

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Hey, I am searching for a Grasshopper way to create “unfolding” Cut Sections. Also with a projection to the XY-Plane to see it in the Top View. If i only use a Surface on each segment of the cut section, i have later …

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## [Curve | Plane intersection missing points](https://discourse.mcneel.com/t/curve-plane-intersection-missing-points/183126)

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**Author:** [@Ondřej\_Skorunka](https://discourse.mcneel.com/u/Ond%C5%99ej_Skorunka)\
**Replies:** 3\
**Last updated:** [June 3, 2024, 8:28am UTC](https://discourse.mcneel.com/t/curve-plane-intersection-missing-points/183126 "2024-06-03T08:28:43Z")

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Hello, I need to find points and their distances perpendicular to the main curve along certain distances. I can’t use Curve Closest Point because it looks for a distance perpendicular to the curve, I need a distance in…

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## [Remove/rebuild/simplify intersecting parts of curve only](https://discourse.mcneel.com/t/remove-rebuild-simplify-intersecting-parts-of-curve-only/180528)

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**Author:** [@aytelliott](https://discourse.mcneel.com/u/aytelliott)\
**Replies:** 2\
**Last updated:** [April 22, 2024, 5:40am UTC](https://discourse.mcneel.com/t/remove-rebuild-simplify-intersecting-parts-of-curve-only/180528 "2024-04-22T05:40:50Z")

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I want to remove and simplify only the intersecting loop of the curves shown below… So that I can create waffle surfaces to be CNC cut, therefore tolerance allows the intersection part to be not considered… I don’t…

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## [Control point curve to interpolated curve with minimal points?](https://discourse.mcneel.com/t/control-point-curve-to-interpolated-curve-with-minimal-points/180254)

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**Author:** [@Jure\_Bebić](https://discourse.mcneel.com/u/Jure_Bebi%C4%87)\
**Replies:** 10\
**Last updated:** [April 17, 2024, 3:05pm UTC](https://discourse.mcneel.com/t/control-point-curve-to-interpolated-curve-with-minimal-points/180254 "2024-04-17T15:05:02Z")

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Is there a way to convert a control point curve to an interpolated curve using least possible points? What I do is Section part of (badly modelled) surface I need, that gets me a planar control point curve. Than I do Di…

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## [Intersection between multiple surfaces](https://discourse.mcneel.com/t/intersection-between-multiple-surfaces/145372)

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**Author:** [@Tommaso\_Marinetti](https://discourse.mcneel.com/u/Tommaso_Marinetti)\
**Replies:** 5\
**Last updated:** [February 8, 2024, 11:07am UTC](https://discourse.mcneel.com/t/intersection-between-multiple-surfaces/145372 "2024-02-08T11:07:30Z")

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Hi. I need to individuate the intersections between multiple elements (in this case i have some surfaces) regardless of the number of these. This is my situation. There are some surfaces iteresected between them. …

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