Hi all,
I have a similar problem than
http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2008-June/012275.htmlbut
I did not succed to solve the problem...
This is the whole problem :
I've done a manipulator (matrix manipulator), which permit to make the
camera follow a node.
The node is moved by an UpdateCallback on a other node.
The manipulator's camera position is computed in a _frame() method :
bool MyManipulator::handle(const osgGA::GUIEventAdapter& ea,
> osgGA::GUIActionAdapter& us){
> [...]
> case(osgGA::GUIEventAdapter::FRAME):
> _frame();
> [...]
> }
In the frame method, I get the world position of the node, and set the
camera's position doing something like this :
osg::Matrixd MyManipulator::getInverseMatrix() const{
> return
> osg::Matrixd::translate(_eye+_vCorrectionGoto)*osg::Matrixd::rotate((_rotation).inverse());
> }
>
with eye = eye + node_translation
my render loop is :
while(!pViewer->done() && !masterKilled )
> {
> pViewer->advance();
> pViewer->eventTraversal();
> pViewer->updateTraversal();
>
> actionBetweenFrames(contextID); //just update some node in the
> scene graph (switch add and remove child)
> pViewer->renderingTraversals();
> }
>
But when I put the camera behind a node, the camera is shaking in the axis
translation (not allong Z axis when node is moving in XY plane)... It looks
something must un-synchronized...
Any idea ?
thanks.
Regards,
Vincent
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