Mesh entities- Ngon problem

[Balazs]

are there different types of meshes? I am trying to use Ngon plugin but Ngon cannot handle my mesh. Is there any special requirements for a mesh to be used by Ngon?
medve.3dm (55.9 KB)

[Petras_Vestartas]

Hi, Can you tell me what you are trying to do and post a screenshot?
I ll try to take a look tomorrow. Normally ngons are the same rhino meshes since it is the property of native rhino, nothing more nothing less.

[martynjhogg]

It works with other GH tools like Weaverbird and Quad Remesh…

I did notice that the original mesh is a mix of triangles and quads… perhaps NGon does not like this?

It’s such a nice mesh! Did you design it yourself or where did it come from?

medve.gh (17.8 KB)

[Petras_Vestartas]

The mesh have no issues. Just imagine you want to have simple subdivision, then for sure WB is the most straight forward to accomplish what you need.

[Balazs]

Actually I would like to use ngon for getting topological info of the mesh: face adjacency, edge adjacency, vertex-face relations, etc…
I was trying to use ngon but sevaral Ngon widgets did not react with my mesh. I think there is not limititation for the poligon edge count in Ngon I guess. ActauylIy do not want to subdivide the mesh. I wanted to use exactly because it contains triangles and quads.

[Balazs]

I can really recall I think it is from Sketchup warehouse.

[Balazs]

I will make screenshot evening.

[Petras_Vestartas]

Adjacency is computed correctly once you create mesh from polylines.
I internally create ngons for triangles and quads to have more consistency, so it works for 3,4, 5 … n vertex faces. These are a few adjacency components, there are more of those under vertex, edge, face tabs:

So you could operations like this:

Joints between elements

Here is the example file. It is only geometry that could be 3D printed while real fabrication methods require much different cutting strategy. @hessel40 Thank you for calling me with all possible accounts [PetrasVestartas] We did this version old time ago using solid lumber: [FullPhoto8] Hexagram Bricks NGon.gh (65.5 KB)

Orient Geometry by Edge and Srf-Normals

I think you are searching for vertex adjacency. [image] orient_geometry_from_point_to_edge_VertexAdjacency.gh (24.9 KB) Or edge face adjacency: [image] orient_geometry_from_point_to_edge_EdgeFaceAdjacency.gh (47.6 KB) First concept give info about vertices that are around nth vertex and other concept gives info about edge and its neighbour faces: [image] I used NGon for getting this info about mesh topology:

[Balazs]

Did you make the screenshot with my mesh?
It did nőt work for me.

[Petras_Vestartas]

Yes the previous screenshot comes from your mesh.
Did you try?

[martynjhogg]

Interestingly, the Sandbox topology tools return no error but no data on this mesh (I think they might be tri mesh only) but the M+ topology tools do give topology info…

[Petras_Vestartas]

@martynjhogg read my post above. There are no errors.

[Balazs]

can you post your example with my mesh please?

[Petras_Vestartas]

Adjacency.gh (18.1 KB)

[Balazs]

Thanks l lot. How should I know that I need ToP and FromP elements before I am using those elements? They have also Mesh inputs…

[Balazs]

I was trying to select just one Ngon of the mesh. I could not because the ngon is further subdivided into further curves without no obvious reason. You know why is that?
How can I select just on Ngon?
subdiv.gh

[Petras_Vestartas]

Convert back to polyline if you just need curves:

[Balazs]

is there a way to get the angles beetween neighboring ngon, or I have to calculate myself?

[Petras_Vestartas]

This should do the job:

NgonAngles.gh (36.6 KB)

[Balazs]

oh, great! thank you very much!