Hi,
I am trying to prepare a small demo with multiple viewports and some text. I 
did something much simpler with plain OpenGL before with my own implementation 
but it suffered a lot from performance, as I am not an expert in this field. 
Basically, I would like to setup 3-4 viewports, much like a CAD app (e.g. top, 
front, perspective/camera, etc). I would also like to create a basic UI with 
osgWidgets. Models contain some detailed terrain data and buildings.
I have used CompositeViewer in my first approach, but it seemed difficult to 
deal with text afterwards. I then migrated to single Viewer multiple slave 
cams, but TrackballManipulator moves master cam, which moves slaves as well. 
Besides, I couldn't achieve orthographic projection on slave cameras (e.g. top 
and front).
I would like to ask some guidance, rather than a full source code; how should I 
proceed? Should I stick to composite viewer? If I do so, where/which view 
should I attach UI (in particular, menu)? I am hoping that my question doesn't 
sound stupid, but I am aware that it doesn't describe what I exactly want. I 
have limited time and haven't got enough time to play with single viewer 
approach either. I have read famous "Viewer vs CompositeViewer" post multiple 
times but having this UI confused me.
I would be very happy, if you could give me some guidance.

Regards,Jason

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