[vtkusers] calculation of an angle between two poly data

[Hila Hiler]

Hi all,

I need an advise regarding the algorithm that I should manipulate in order
to calculate the angle between two poly data.
Those poly data are in 3D.

polyData1 represents a set of lines that were assigned like this:

vtkCellArray*  linesContainer;
...
polyData1->SetLines ( linesContainer);

and polyData2 is a vtkTubeFilter.

 - how can I access/extract that polys direction in order to calculate the
angle between them?


any ideas would be very appreciated.

Hila
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