How to display a line with interaction handles by python?

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1

How to display a line (vtkMRMLMarkupsLineNode) with interaction handles by python?

@lassoan@Juicy@jamesobutler @jcfr @pieper

like that:

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  1. First get the reference to vtkMRMLMarkupsLineNode (see get-mrml-node-from-the-scene)
  2. Get the DisplayNode for that Line Node. (similar to change-markup-fiducial-display-properties)
  3. The interactive handles can be set from the DisplayNode. SetHandlesInteractive.
2 Likes
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Great! Thanks!
DisplayNode.SetHandlesInteractive(True)

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@jamesobutler

Is it possible to further control the position of the “origin” and “rotation” or “translate” of the handle?
是否可以进一步控制handle的"原点"的位置以及"rotation"或者"translate"呢?

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Yes. They are all methods in the Markups Display Node class.

1 Like
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@jamesobutler

I want the “Origin” of this Handle to be at the end of the line segment instead of the midpoint, how to do it?

我想让这个Handle的原点,在线段的一端而不是中点,怎么做呢?

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That’s not something that I believe is possible at the moment.

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@jamesobutler
Thanks

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You can position a line shaped actor (e.g., that you generated using SlicerIGT extension’s Create Models module) using a transform. You can update the transform from a markups plane node by a few lines of Python code. This technique is used in the Bone Reconstruction Planner extension.

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Hello, I am trying to find a way to grab 2 planes (generated from markups module) and lock (?) combine them together so when I transform them in position, they move in harmony.

How can I do this programmatically? assuming I have displayNodes of both planes.
Thanks in advance!

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Also would there be a way to adjust the size of the interactive handles programmatically?
Thank you & sorry for many questions

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没太看懂你的问题, 不过可以看看这个👇或许对你有帮助

I don’t understand your question very well, but you can take a look at this👇 maybe it will help you…
How to rotate OrthogonalSlicesDeg in slices?, getPlaneIntersectionPoint

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Thank you, but I do not think it is similar to my problem.
My problem is:

  • I have 2 plane nodes. I want the relationship between the 2 planes to be fixed. If I move 1 of them, I want the other to move by the same amount, if I rotate 1 of them, I want the other to rotate by the same amount
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Screen Shot 2022-08-22 at 12.57.55 AM

There appears to be a way to do it on the user interface under “Markups module” then “Interactive handles.” How can I do this programmatically?