Hi Mukund,
So, my first query is clear. Well as for my second one. How is it the object is
being projected if it is even placed before the near-clip plane? ie before 1900?
i could not get this part.
Do you have a camera manipulator attached to your viewer? Even if you
don't create one yourself, some usage models of osgViewer will create a
TrackballManipulator for you.
Whether the object is in view does not just depend on the projection
matrix, it also depends on the view matrix. If you set up your
projection matrix like you said, but your view matrix is identity except
for a translation by (0, -2000, -1000), then you will still see your
node. And by default, on first frame, the default camera manipulator
will do just that - change the view matrix so that the whole scene is
visible...
So if you want total control over camera placement and projection,
remove the camera manipulator. And if you want to see why your node is
visible, check the view matrix of your camera after a few frames in the
debugger...
Hope this helps,
J-S
--
______________________________________________________
Jean-Sebastien Guay [email protected]
http://www.cm-labs.com/
http://whitestar02.webhop.org/
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