Re: [osg-users] object shaking

2008-06-02 Thread Robert Osfield
On Mon, Jun 2, 2008 at 12:42 PM, Peter Wraae Marino <[EMAIL PROTECTED]> wrote: > Hi Robert, > > Thanks for all your advice, really do appreciate it. > > As you mentioned the camera needs to finish it's update traversal, so I > decided to try > the cull-callback which should be called after all upda

Re: [osg-users] object shaking

2008-06-02 Thread Peter Wraae Marino
Hi Robert, Thanks for all your advice, really do appreciate it. As you mentioned the camera needs to finish it's update traversal, so I decided to try the cull-callback which should be called after all updates have been done but the scene still shakes when using the cull-callback and this kin

Re: [osg-users] object shaking

2008-06-02 Thread Robert Osfield
Hi Peter, On Mon, Jun 2, 2008 at 10:52 AM, Peter Wraae Marino <[EMAIL PROTECTED]> wrote: > Also I understand why this works, but don't really approve of it because it > makes my code more "hardcoded" because I need to implement a direct update > call after viewer->updateTraversal() which is kinda

Re: [osg-users] object shaking

2008-06-02 Thread Peter Wraae Marino
Hi Robert, I tried your suggestion and yes it does work, the panning of the camera doesn't shake the scene anymore. .. but the startup position of the camera is shaking? Also I understand why this works, but don't really approve of it because it makes my code more "hardcoded" because I need to im

Re: [osg-users] object shaking

2008-06-02 Thread Robert Osfield
Hi Peter, One step that might be useful to you would be to break the main loop out into its constuent parts i.e. viewer.run(); becomes: viewer.setCameraManipulator(new osgGA::TrackballManipulator); viewer.realize(); while(!viewer.done()) { viewer.advance(); viewer.event

Re: [osg-users] object shaking

2008-06-02 Thread Peter Wraae Marino
Hi, Ok.. I tried to make the example simple.. but perhaps I made it more confusing. I'll try to explain what my end result shoud have been. I'm trying to create a grid that is always visible from the viewer. The grid needs to scale at certain points when the user zooms in/out. The basic idea was

Re: [osg-users] object shaking

2008-06-02 Thread Robert Osfield
Hi Peter, You callback is pretty odd, while I don't exactly know what you are trying to do and why, whatever it is the callback you've written is almost certainly not the way to do. Could you take half a dozen steps back and then explain from a high level what you are trying to do in your app the

[osg-users] object shaking

2008-06-02 Thread Peter Wraae Marino
Hi users, I have a problem with my scene shaking. I have simplied the problem to the code below. A short description- the code find the position in the scene where the center of screen is projected onto a plane. This position is given to a PositionAttitudeTransform so the "box" is transformed to t