[vtkusers] Ray interesection with volume - findinf the mouse position

[polys_poly at hotmail.com]

Hello,

Currently i am creating a volume of a DICOM Dataset. The interactor i am using is vtkInteractorStyleTrackballCamera. 
What i want to do is finding the mouse pointer location on the rendering window, and then finding the ray that connects the position of the camera with the mouse position so i can find the points of the volume that this ray intersects.

I would appreciate any help on this subject.

Thanks,
Polys
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