Hi All, I’m getting in trouble finding the angle between faces and how to use the Brep Topology. My goal is to calculate the average bending angle between the faces in multiple Breps [immagine] [20260621_angolo facce] This are the (partial) 3D model and the GH: 20260621_angolo facce.3dm (144.…

you might consider to use Planar it wil say that the surfaces are NOT planar, but it also gives (as far I understand) an average. And then calculate the angles between te planes. [Schermafbeelding 2026-06-21 om 11.57.14] [Schermafbeelding 2026-06-21 om 11.55.42]

[image] Eef Weenink: you might consider to use Planar Thanks, I know the faces aren’t flat but it’s not a problem becasue the company has a more powerfull tool named “the Hammer” :rofl: Being serious this will not be a problem becasue the shape is still in the acceptable bending tolerance.

This is my solution at the moment: 20260621_angolo facce_b.gh (16.6 KB) But other suggestion or improved version will be very welcome!

Something like this: [grafik] 20260621_angolo facce_Re.gh (10.0 KB) Not sure, why I did not see there were other posts in the meantime. Sure it’s my internet.

[2026-06-21 13_42_36-Grasshopper - 20260621_angolo facce_b] 20260621_angolo facce_b.gh (33.4 KB) first solution use topology second solution doesn’t use topology, and keep the brep ash whole, intersecting it with small circles… spare a couple of components but operate slower… i find this useful …

[2026-06-21 14_54_27-Script Editor] 20260621_angolo facce_b c#.gh (5.8 KB) under 30 rows of code… almost the same amount of components used above in other solutions. The intresting part is this: on grasshopper you must juggle with complex datatrees to achieve the goal. Hard! with c#, rhinocomm…

I don’t know. People always complain about the difficulty of data trees in Grasshopper scripts… Are they? Really that complicated? I assume looping makes coding much easier. But I also think alot of people look at the componentry of a script, and think that it is “so much”, when once you learn to re…

Both grasshopper solutions I posted above would have been much simpler if working with just a single Brep. c# may looks simpler just because we can easily “cut” a datatree depth level of the initial dataset… Otherwise, managing the 3 breps simultaneously on the code, would result in more rows totall…

[image] Riccardo Majewski: under 30 rows of code… almost the same amount of components used above in other solutions. Thanks Riccardo, I’m not really a fan of code inside GH becasue it will be harder to maintain and I can’t pass it to a collaborator with fewer knowledge. The pure GH solutio…

[image] skysurfer: it will be harder to maintain and I can’t pass it to a collaborator with fewer knowledge … … if a definition have many datatree with 2 levels paths ( like {x,y}(i) no zeroes…) , I find it bothersome to maintain even if I created it myself. I think with c# you are much less…

HELP - bending angles on Breps

Grasshopper

felix.brunold (Felix) June 23, 2026, 3:16pm 15

Maybe this thread helps:
https://discourse.mcneel.com/t/determining-bending-angles-for-a-brep

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HELP - bending angles on Breps

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