[vtkusers] 3D marker insertion in a displayed volume

[anna han wan]

Hi again,
I have a question about markers. I've seen in volview that we can insert 3D
marker in the displayed volume and we can move it using the mouse. I am just
wondering if vtk has classes that allow me to insert a 3D marker in my
displayed volume as well?
Any help is much appreciated.

Anna
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