Creating a line between already made mark up points

Support
1

I’m trying to draw lines exactly where I placed some markup points

is there a way to define a line or plane according to already placed mark-up points?

thanks

2

You can copy-paste markup control points from a markups fiducial list to a markups line in Markups module. Select the markups fiducial list, in Control points section select the two control points, hit Ctrl-C to copy them to the clipboard, select the markups line, and hit Ctrl-V to past the control points into the line).

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3

Dear Andras!

Is it possible to make automatic? I mean I have two markup points and get a line between these two points, without Ctrl-C and Ctrl-V?

Thanks a lot,
Imre

4

Thats like three clicks; one to create the empty line markups object, one to copy and one to paste.

Is it too complicated? You can probably do it by scripting it.

5

Yes, this is easily scriptable. Here is an example function you could paste in the python interactor

def connectPoints(markupsNode1, markupsNode2):
    '''Simple function which connects the first control
    point of markupsNode1 to the first control point of 
    markupsNode2 with a line'''
    pt1 = markupsNode1.GetNthControlPointPositionWorld(0)
    pt2 = markupsNode2.GetNthControlPointPositionWorld(0)
    newCurveNode = slicer.mrmlScene.AddNewNodeByClass('vtkMRMLMarkupsCurveNode')
    newCurveNode.AddControlPoint(*pt1)
    newCurveNode.AddControlPoint(*pt2)
    return newCurveNode

Then you could use it like this:

connectingLineNode = connectPoints(getNode('myFirstPoint'), getNode('mySecondPoint'))

where you would need to replace ‘myFirstPoint’ and ‘mySecondPoint’ with the names of the markups which contain the two points you want to connect.

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6

Dear Mike Bindschadler!

Thank you so much it works!

With best regards,
Imre

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