[vtkusers] How to forward mouse move event to polydata algorithm and get there direction of projection

[Jana Sefcikova]

Hi Jochen,

I want know actual projection direction of current scene inside
vtkPolyDataAlgorithm (here MySphereSource) , on mouse move i will update
algorithm according to direction. In the code I wanted only print the
vector.

It is better ?

Jana
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