Re: [osg-users] Model attached to Camera
Hi Robert, thanks for the hint. I don't have CameraManipulator. Anyway I made it work with HUD like approach. Thanks again Nick On Thu, Nov 14, 2013 at 2:55 PM, Robert Milharcic < robert.milhar...@ib-caddy.si> wrote: > On 14.11.2013 11:32, Trajce Nikolov NICK wrote: > >> It doesn't look right. What is wrong with this code? Also, there is some >> delay (when I don't apply the orientation just for debug), the model when >> attached is sort of delayed following the camera. Any hints? >> > > Hi Nick, > > I'm just guessing here, but if model is delayed, it probably means that > camera's view matrix wasn't updated yet. If I remember correctly, Viewer > will update its camera by calling cameraManipulator->updateCamera() > somewhere in the update traversal too... so, maybe node callback is called > before updateCamera()? Maybe you could cast camera->getView() to > osg::Viewer::View and then call getViewerBase(), cast it to proper Viewer > and call viewer->getCameraManipulator()->updateCamera() ... > > Robert Milharcic > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- trajce nikolov nick ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Model attached to Camera
On 14.11.2013 11:32, Trajce Nikolov NICK wrote: It doesn't look right. What is wrong with this code? Also, there is some delay (when I don't apply the orientation just for debug), the model when attached is sort of delayed following the camera. Any hints? Hi Nick, I'm just guessing here, but if model is delayed, it probably means that camera's view matrix wasn't updated yet. If I remember correctly, Viewer will update its camera by calling cameraManipulator->updateCamera() somewhere in the update traversal too... so, maybe node callback is called before updateCamera()? Maybe you could cast camera->getView() to osg::Viewer::View and then call getViewerBase(), cast it to proper Viewer and call viewer->getCameraManipulator()->updateCamera() ... Robert Milharcic ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Model attached to Camera
I gave up on this approach. Used another Camera that mimic HUD but with Prespective projection. Works now. Have to learn to stress less when looking for answers :-) Cheers, Nick On Thu, Nov 14, 2013 at 1:32 PM, Trajce Nikolov NICK < trajce.nikolov.n...@gmail.com> wrote: > Hi Community, > > I would like to do this mentioned in the subject and I am facing issues. > Sounds pretty simple but need help. > > The model is attached to osg::MatrixTransform and I have > osg::UpdateCallback attached to it that sets the Matrix based on the > camera. So here is the snippet from the callback: > > osg::MatrixTransform* mxt = dynamic_cast(node); > > osg::Vec3 pos = camera->getInverseViewMatrix().getTrans(); > osg::Quat rot = camera->getInverseViewMatrix().getRotate(); > > mxt->setMatrix(osg::Matrix::rotate(rot)*osg::Matrix::translate(pos)). > > It doesn't look right. What is wrong with this code? Also, there is some > delay (when I don't apply the orientation just for debug), the model when > attached is sort of delayed following the camera. Any hints? > > Thanks a bunch > > Nick > > -- > trajce nikolov nick > -- trajce nikolov nick ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
