When I use TrackballManipulator in the scene.I use the
Camera::setViewMatrixAsLookAt to set the initial position of the camera and
view center. and I fail,then someone tell me that I should use the
TrackballManipulator::setHomePosition to set the initial position of the eye
and center. then I success.
But when I meet complex scene . the problem occurs and I do not know
why . The following are the steps:
1. I first use TrackballManipulator::setHomePosition to set the initial
position of the eye and center .
It is OK.
2. I add an object to the scene.and the home position of the Manipulator should
change to the center of the added object,but I try many ways,it does not work
. sometimes it seems the camera work in a very strange mode ,the wrong
eye,wrong center ,wrong up .
So I want to know how to solve the problem and the difference between
Manipulator and Camera.
thanks!
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