Hello Julian, What EXACTLY are you trying to achieve? Do you need some objects (GUI objects if I understand correctly) to have their own transformations without being affected by the Manipulator? If so, you can use set the transformation to ABSOLUTE_RF. transform->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
You can also use billboards so their position will change with the manipulator transformation, but they will always direct towards the observer. And of course, you might want to check osgWidget that supply GUI tools for osg scenes, (And if I'm wrong with the description I apologies). Good luck, Guy. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Julian Looser Sent: Monday, June 09, 2008 5:04 AM To: OpenSceneGraph Users Subject: [osg-users] Manually setting osgManipulator transformations Hi, I posted a question a while ago about osgManipulator, but didn't get any replies. My problem is that I want to be able to set the transformation matrix directly on a selected object, in addition to using the various osgManipulator widgets. That is, setting the matrix in code should update the widgets, and interacting with the widgets should update the matrix. From what I can tell, it's currently only possible to generate the transformation matrix with osgManipulator - you can't modify the transformation matrix and see that change reflected back in the widgets. I would be surprised if nobody has run into this problem before. It seems like required functionality for many applications where the widgets in osgManipulator would be most helpful. In my case, I'm trying to recreate a rudimentary 3D editor and the ability to type specific translation and rotation values into the GUI is just as important as being able to directly drag the handles on the manipulator widgets. I've reached the conclusion that I can't do this with osgManipulator so I'm considering reimplementing something to suit my needs. I'd really appreciate it if someone could tell me: a) that I'm wrong and osgManipulator *can* do this (would be great!) b) is anybody working on osgManipulator who I could collaborate with on adding what I need? c) would it be easier/cleaner/faster to simply start from scratch? I only propose (c) because it looks to me like osgManipulator is designed as a sort of message-passing system that incrementally modifies a transformation matrix. Trying to make that process work backwards sounds tricky, and making it so you can seamlessly jump between manual (typing) and direct (click and drag) editing modes sounds even harder. As always, thanks for listening. :-) Cheers, Julian. _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
