[Paraview] WorldToView or vtkCaptionActor2D in Paraview?

[whosayni]

Hello,
i'm writing simple reader to load binary .op2 files from nastran into Paraview.
Is it possible to use vtkCaptionActor2D (which i use extensively in my simple VTK-based program) in Paraview?
Is it possible also to get display (x and y in pixels of screen) coordinates of a point with given world coordinates?
Any suggestions will be appreciated.
Ducklord.

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