[vtkusers] where is the code for rotation?

[Hossein Nazem]

hi all,
i have a 3d volume and i ve wrote a function to rotate it:

Renderer->GetActiveCamera()->Roll(deg1);
Renderer->GetActiveCamera()->Azimuth(deg2);
Renderer->GetActiveCamera()->Elevation(deg3);

in comparison with defult rotation in vtkrenderwindowinteractor, mine is
slower and keep the image quality while the defult rotation(which use mouse
events) reduces the quality during the rotation and when the rotation
finished it restores the initial quality, i want to know where is the code
of this process or how could i do the same?
thanks
hossein
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