Mesh Face Neighbours

Replies to This Discussion

Permalink Reply by ng5 Alex on September 5, 2015 at 12:08pm

Hello Alexander,

Sandbox has mesh topology components with indexes output.

edit. chcked the components does not seem to have what you are after right out of the box

cheers

alex

Permalink Reply by Daniel González Abalde on September 5, 2015 at 12:24pm

Private Sub RunScript(ByVal Msh As Mesh, ByRef A As Object) 
If Msh Is Nothing Then Return
Dim N As New datatree(Of Integer)
For i as int32 = 0 To Msh.Faces.count - 1
N.addRange(Msh.Faces.AdjacentFaces(i), New gh_path(i))
Next
A = N
End Sub

Attachments:

• MeshFaceNeighboursVB.gh, 11 KB

Permalink Reply by ng5 Alex on September 5, 2015 at 12:25pm

i was wrong. sandbox outputs these indexes.

Permalink Reply by Aleksander Dynarek on September 5, 2015 at 1:49pm

 ng5 Alex  Thanks, it works!

 Daniel González Abalde

I don't work in vb but i learn c# a bit, tried to translate but it doens't work (there is something wrong in addRange, propably with gh_path but I am not sure). Could you help?

private void RunScript(Mesh Msh, ref object A)
{

List<int> N = new List<int>();
for (int i = 0;i < (Msh.Faces.Count - 1);i++)
{
N.AddRange(Msh.Faces.AdjacentFaces(i), new gh_path(i));
}
A = N;

}

Permalink Reply by Daniel González Abalde on September 5, 2015 at 2:13pm

DataTree<int> N = new DataTree<int>();
for (int i = 0;i < (Msh.Faces.Count - 1);i++)
{
N.AddRange(Msh.Faces.AdjacentFaces(i), new GH_Path(i));
}
A = N;

Permalink Reply by taz on September 5, 2015 at 1:22pm

Mesh(+) has this now too as well as labeling components.  Sandbox, however, also works with BReps in addition to meshes. Starling works too but is based around plankton meshes so it's a little more obtuse to use...

Permalink Reply by Aleksander Dynarek on September 5, 2015 at 2:16pm

 Daniel González Abalde 

already done it in c#, but thanks!

Permalink Reply by Joshua Jordan on March 16, 2016 at 11:42am

when are you old heads gonna start using the text buttons so i can translate your work without hunting for every little picture?  :)

Can you give me a quick explanation on how to use the index values that come out of the F-F-angle component, matching them with the indices of the edges-midpoint component?

I don't know enough about mesh information ordering to know what I'm looking at.

Permalink Reply by taz on March 16, 2016 at 2:36pm

I resemble that remark... I went the way of DR and jumped on the picture band wagon. It's more compact (or so the theory goes).

I've played around a bit more with all of these add-ons. I think m+ is pretty slick, but if you have faces w/ more than 4 sides it's a non-starter because of mesh limitations (until everybody starts writing components for Plankton meshes which can do n-gons).

Sandbox is the way to go to stick with BReps (but I copied the way m+ does labels).

And now to answer your questions:

Permalink Reply by Joshua Jordan on March 16, 2016 at 4:40pm

OK YOU ARE GREAT!

The second half of that quick question:  by which process would one then use those indices to tag those edge midpoints with the angle measurements?   Or, how do you determine which text those labels are displaying (instead of index numbers).

Or, in other words-- how do I match the structure of the data coming out of the edge-midpoint component with the structure of that list of angles?

If you think I'm going to get it anyway, feel free not to answer.   Young ones must sometimes learn hard way.

Permalink Reply by Joshua Jordan on March 17, 2016 at 1:17pm

or, does that indexing of faces match what you get if you "deconstruct mesh" ?

Permalink Reply by David Mans on March 17, 2016 at 1:21pm

m+ plankton edition on its way... hopefully before 2017