Access 3d renderer for multiple view

Support
1

Hi, I am wondering if it is possible to access the renderer that is associated with a view node. I am currently grabbing the view node using

slicer.util.getFirstNodeByName('View1'), but I don’t know know how to grab the renderer that is associated with that view or rather what threeDwidget the view belongs to.

I am creating a script where more than one 3d views can be created, but I need to keep track of the first one and it seems that I can’t just assume that idx = 0 in

slicer.app.layoutmanager().threeDWidget(idx).threeDView().renderWindow().GetRenderers().GetFirstRenderer()

I am using the imagedata from one of the 3d views to capture the image and create an AR overlay in the slice view.
Thank you for any help.
Peter

2

You should be able to iterate over the threeDWidgets and find the one that matches your view node with this call:

slicer.app.layoutManager().threeDWidget(0).threeDView().mrmlViewNode()
3

Thanks, I think that makes sense. I hadn’t thought of doing it that way, because I was thinking there was a direct reference between the two

4

You’re right, this is cleaner:

>>> v = getNode('*View*')
>>> v
(MRMLCore.vtkMRMLViewNode)0x253dc1648
>>> slicer.app.layoutManager().viewWidget(v)
qMRMLThreeDWidget(0x7fce8970bfd0, name="ThreeDWidget1")
5

Thanks,
That’s so much easier to use.