I’m pretty slow today :slight_smile: this came while I was doing some Brep Topology, in particular find Face-Vertex relationships (which Vertex belongs to which face) as the Brep Topology component only gives Faces and Edges infos I was aware deconstructing brep faces using Deconstruct Brep (which…

Hi @inno , One of my favorite images: [image] The DeBrep component just returns the Brep’s vertex array as is, unordered. Without knowing the trim or edge, they are pretty much useless. I’ve attached a solution that might help you. Deconstructed_Deconstructed_Brep_Faces_Less_Weird.gh (10.0 KB) …

This has been a problem for a while. [image] [image] Bug: Surface orientation / curve direction inconsistency Serengeti (Rhino WIP) I used sporph to orient a mesh onto box surfaces today and noticed an inconsistency in the surface direction on boxes. The Gr…

I’ve run into tthis problem a lot of times. I still don’t know the reason it happens or the different behaviours, so the only thing I came up with is to fix the list in a way that stays consistent. something like this [image] Hope it helps

[image] inno: I was doing some Brep Topology, in particular find Face-Vertex relationships (which Vertex belongs to which face) as the Brep Topology component only gives Faces and Edges infos Parakeet plugin has this component that might help [image]

the vertex with the smalest number in the whole brep does have the smalest number in the face.. the order stays the same. i did not expect these points to have a relation to the normal - I think they can not.

Parakeet is also giving me a hard time :smiley: Box input directly tells me all the Vertexes belong to all the Faces: [image] if I explode and join the Box into a Brep, the order of the Vertex changes, but the Face|Point list is the same: [image] BrepTopology_Parakeet.gh (19 KB) speaking of …

Same issue here with the bottom face…

[image] inno: speaking of Breps which have planar/polygonal faces, maybe the most “reliable” method might be with Rhinocommon to go through each BrepFace, extract its BrepLoops and explode it to get the Vertexes? I’m gonna try something my previous example was for a box, or generally speaking…

sorry, I do not understand: are you looking for a special debrep that works for single face breps only? if not, how can the list be ordered to match the normal? clockwise for one face is counterclockwise for the neighbour face

this is awesome! thanks a lot! I sort of recall seeing that image in older threads (probably posted by you :slight_smile: ) it makes a lot of sense! I don’t think changing DeBrep component to output vertexes that way would break existing definitions because -as you have clearly explained- they ar…

Deconstruct Brep on deconstructed brep Faces returns weird Vertex lists

Grasshopper

martinsiegrist (Martin Siegrist) September 3, 2025, 12:30pm 2

This has been a problem for a while.

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Deconstruct Brep on deconstructed brep Faces returns weird Vertex lists

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