How to get the index of a Path as Integer inside a VB.net component

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Permalink Reply by David Rutten on December 29, 2011 at 5:29am

Hi Paul,

 

this is a bit weird:

 

Dim pathindex As Int32
pathindex = x.Path(g).ToString

 

if pathindex is defined as an integer, you cannot assign a string to it. You can only assign integers or types that know how to upcast themselves to integers (such as shorts and bytes).

 

A path in a datatree is an array of integers, not a single number. So, when you ask for x.Path(g) you get an instance of a GH_Path class, which stores a bunch of integers on the inside and provides some methods of accessing and modifying them. Both of the following two approaches create a new list of integers filled with the first number in each path:

 

Dim indices As New List(Of Int32)
For i As Int32 = 0 To x.BranchCount - 1
  indices.Add(x.Path(i)(0))
Next
A = indices

'---------------------------
Dim indices As New List(Of Int32)
For Each path As GH_Path In x.Paths
  indices.Add(path(0))
Next
A = indices

 

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Attachments:

• HowToAccessPathIndexes.gh, 3 KB

Permalink Reply by paul hackett on January 2, 2012 at 6:42pm

Thank you very much, David.