Hi,

I'm kind of afraid the answer will be: reimplement a camera manipulator that 
does what you want, but maybe someone had a similar problem and there is a 
solution already.

Ok here goes. Right now I'm using a trackball manipulator, which is great. Now 
when you move the scene and thus the trackball out of center rotation gets 
weird. The object kind of seems to orbit around that center and is not really 
controllable by the user. Which is understandable knowing how the trackball 
principle works.

So what I need is a two-phase trackball. One that still lets you move the 
camera but does the rotation based on the center of the scene. So there will 
another transformation node needed between camera and scene, the trackball 
rotation works on.

I'm thankful for hints on if there something like this already or how to do it.
... 

Thank you!

Cheers,
Otto

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Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=31255#31255





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