Hi Vincet, Even with doubles there are still precisions issue, just much smaller than with floats. If you are using a iterative calculation then if you aren't care the errors could accumulate until their become visable. The best thing to do is to avoid an iterative calculation and calculate the new camera position based on the position of the node in the scene on each frame.
Robert. On Thu, Mar 27, 2008 at 8:38 AM, Vincent Bourdier <[EMAIL PROTECTED]> wrote: > Hi all, > > I'm currently making a new Manipulator inherited from MatrixManipulator. > > The specificity is : On the call of a function, the manipulator (camera) > have to follow a node which is moving. I mean that the camera have to be > exactly immobile relative to the moving node. > For that i've used Matrix, Vec3 and Quat. > > All looks great, but after 10 minutes of running, I can see that a little > moving difference between the node and the camera... if the node rotate > about 2 or 3 axis, the difference is more important... > > Using Vec3d, Quat and Matrixd, is there any reason for this lack of > precision ? Or is it my method which is not good... ? > > 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
