Hi Vincent, Just a guess: You may want to doublecheck that actionBetweenFrames is not switching the node which contains the update callback. That could cause all kinds of shaking.
Regards, /Per 2008/7/9 Vincent Bourdier <[EMAIL PROTECTED]>: > Hi all, > > I have a similar problem than > http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2008-June/012275.html > but 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 > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
