Is this a bug for planeWidget?

Support
1

I created a planeWidget to cut the volume. However the volume was disappeared when I rotate the window to a angle by mouse.

 def clipPlane(obj, event):
            obj.GetPlane(clippingPlane)
            #planeWidget.GetPlane(clippingPlane)
            volumMapper.AddClippingPlane(clippingPlane)
            
            renWin.Render()
        
        
        
        ren.SetBackground(0.5, 0, 0.0)



        style = vtk.vtkInteractorStyleTrackballCamera()
        
        style.SetDefaultRenderer(ren)
        iren.SetInteractorStyle(style)
        renWin.GetInteractor().SetInteractorStyle(style)
        clippingPlane = vtk.vtkPlane()
        
        planeWidget.SetInteractor(iren)
        planeWidget.SetProp3D(volume)
        planeWidget.SetPlaceFactor(1.25)
        planeWidget.SetResolution(5)#//That is, set the number of meshes
        planeWidget.NormalToZAxisOn()#//Initial normal direction parallel to Z axis
        planeWidget.SetRepresentationToWireframe()#//Planes display as mesh properties
        planeWidget.SetCenter(volume.GetCenter())#//Set plane coordinates
        planeWidget.PlaceWidget()#//Lay the plane
        planeWidget.GetHandleProperty().SetOpacity(0)
        planeWidget.On()#//Display plane
        planeWidget.AddObserver("InteractionEvent", clipPlane)
2

bug Video_2021-05-16_214003
vtk==9.0.1

3

Combination of semi-transparent actors and volume rendering can be tricky. Enabling depth peeling may help. You may also try to adjust the camera clipping planes.