Hello Sadi,
Sadi Tanis wrote:
> Hi All!
>
> I am trying to find out how to implement a trackball navigation so that
> the camera turns around a puppet I have loaded via VRML-Loader into the
> scene. For now I tried the set() function which is used in the
> OSG:Navigator class to change the atx,aty,atz values. Afterwards I
> checked the transformation matrix with the getMatrix() function. It
> changed but if I do any mouse action inside the window nothing has
> changed at all. The Camera looks still at the same point: Pnt3f(0,0,0).
how does input get from your windowing system to the navigator ?
> This part I have added for testing into the main function:
>
> >Navigator *nav = new Navigator;
> >nav->set(Pnt3f(0,0,1),Pnt3f(0,0.414,0.910),Vec3f(0,1,0));
> >nav->updateCameraTransformation();
> >cout << "current Transformation" << nav->getMatrix() << endl;
does this have any effect on your view ?
> Is there another way to get the camera turn all around the puppet?
The Navigator class is meant to be a unification of the FlyNavigator,
TrackballNavigator (the default) and WalkNavigator. It might not be
trivial to use it in the way you do above, as you might get funny
interaction with the Navigators built in behavior. The easiest way to
implement a new type of navigation would probably be to write a new
class SomeNavigator that does what you want, that way you don't have to
understand the Navigator first. On the other hand you'd duplicate some
of the code.
Hope it helps,
Carsten
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