[vtkusers] How to get the extent points of a render window..??

[rakesh patil]

Hello Users,

How can I get the extents coordinates of a render window? I mean, suppose a
grid is displayed on a render window, and I want to know min_lat, max_lat,
min_lon, max_lon for that entire scene. I dont want the min/max lat/lons, of
the grid, but the extreme coordinate points of the render window?

Is it possible in VTK?

Thanks in advance

Regards
Rakesh Patil
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