[vtkusers] Moving actor with mouse

[Doug Hoppes]

Hi all,

                I have an sphere actor in my scene and I'm trying to move it with my mouse.  I noticed that the actor position is x=.5, y = 12.4, and z = .4.  The mouse coordinates are x = 500 and y = 600.  Is there a way to convert the mouse coordinates to the world coordinates so that the actor is always under the mouse?

Doug

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