[vtkusers] changing the coordinate's system origin

[Emmanouil Moschidis]

Hello as far as i know vtk's coordinate system origin is the lower left corner. (correct me if i am wrong). 

I would like to change my x,y,z coordinates so that they are visualized as the origin would be the upper left corner. 

Do you know how should i change them? 

Thanks

       
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