Daniel Zuidinga wrote: > can´t anybody help me? > > is there a chance at all to get the right transformation data? or have i > to save the data elsewhere? > Your rotx/y/z are known as "euler angles". OpenSG stores a matrix, whose rotation-part can be extrated as a quaternion. Feel free to read up on euler angles vs. matrices vs. quaternions. You will need some understanding of these terms to grasp and solve your problem (and perhaps to make sense of some points below). Google for it.
The components of a quaternion is not at all like the euler angles you created it from (for one thing, there's four values, not three). It's a quite different beast with advantages (no singularities with 90 deg rotations, known as "gimbal lock") and disadvantages (almost impossible to deduce the rotation effect from looking at it's values). However, the qX quaternion you use to accumulate euler-toations and use as rotation component in the matrix (in setObjectTranslation) should be pretty equivalent to the rotation you retrieve in the get-function. Now, decomposing a rotation into euler angles is possible, although since some rotations can be caused by several combinations of euler angles, you might not get back exactly what you put in, but at least something equivalent. Code for this is _not_ in OpenSG, but there should be some on the net, that you might be successful with. However, for simplicity, I suggest you avoid trying to read-back your euler angles, and use them as little as possible in any form of animation. Try to learn and use matrices instead. Use quaternions only to create the rotation you want, as you have done, then put them in a matrix. Rotation in 3D is a inherently difficult problem (mathematically), but most of us manage with just avoiding common pitfalls, so don't feel intimidated by it all. Hope it helps, /Marcus ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Opensg-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/opensg-users
