Extract RAS coordinates by clicking

Hi to everyone :slight_smile:
Today I want to extract RAS coordinates to 3d markups/curves to click.

My goal is interact with 3d view (if is not possible, interact with 2d views would great too). Processing the click I would like to know the ID of the selected point and RAS coordinates.

Is there a way to do it by python code ā†’ Run some lines which allows the user to select one point and then he can retrieve the coordinates?

Iā€™m interested in obtain info from centerlines created by extractCenterlines module

Also interested in having a callback function when clicking on a markups. Any solution for this?


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This worked for me for adding new points:

def onPointDefined(caller, eventid, callData):
    fiducialNode = caller
    fiducialIndex = callData
    print(f'Defined: {fiducialNode.GetName()}, Fiducial index: {fiducialIndex}')

fiducialsNode.AddObserver(slicer.vtkMRMLMarkupsNode.PointPositionDefinedEvent, onPointDefined)

For clicking this could be the solution:

def onPointClicked(caller, eventid):
    fiducialNode = caller
    fiducialIndex = int(fiducialNode.GetAttribute('Markups.MovingMarkupIndex'))
    print(f'Moved: {fiducialNode.GetName()}, Fiducial index: {fiducialIndex}')

fiducialsNode.AddObserver(slicer.vtkMRMLMarkupsNode.PointStartInteractionEvent, onPointClicked)
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