generative modeling for Rhino
Data Trees read-only?
I want to make a series of transformations to a DataTree which was created inside a VB component (iteratively adding vectors to initial points).
Once it's created with the initial points, however, any attempts to change the value returns:
Error: Property 'Item' is 'ReadOnly'. (line xxx)
I'm using: myTree(path, index)+=xVector
is there a way of rewriting datatrees?
Tags: datatree, edit, item, readonly, rewrite
Views: 39
Replies to This Discussion
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Permalink Reply by David Rutten on -
Hi Trevor,
Item is indeed a ReadOnly property. I can't for the life of me remember why I did this, though it's probably to do with setting values that don't exist. Anyway, It's easy enough to throw an exception when you do this so I'll make the item accessor Read/Write for the next release. In the meantime:
For p As Int32 = 0 To pts.BranchCount - 1
Dim branch As List(Of Point3d) = pts.Branch(p)
For i As Int32 = 0 To branch.Count - 1
branch(i) += Vector3d.ZAxis
Next
Next
A = pts
--
David Rutten
david@mcneel.com
Poprad, Slovakia
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Permalink Reply by David Rutten on
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So, starting with the next release you should be able to write:
For i As int32 = 0 To 6
myTree(New GH_Path(0, 0), i) += Vector3d.ZAxis
myTree(New GH_Path(0, 5), i) += Vector3d.ZAxis
Next
A = myTree
--
David Rutten
david@mcneel.com
Poprad, Slovakia
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Permalink Reply by trevor.patt on -
Great, thanks!
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