[vtkusers] Obtain a 2D image slice from a volume

[Luca Pedriali]

I'm new to VTK. I have to slice a 3D volume, created by a series of
dicom, with a oblique plane.
With the example in Examples\GUI\Tcl\ImagePlaneWidget.tcl i sliced the
volume with orthogonal plane (axial, coronal and sagittal).
But how can I rotate one of these planes of a certain angle?

My project has in input the three angle that this plane forms with axis x,y,z.

Thanks