"George Bekos" writes: > Hello OSGers! > > The last days I am playing with osgAnimation in order to implement something. > I managed to make something work like I want it to but I don't know if this > is the right approach or not. I will describe my problem and then I will > describe my solution. I would be more than grateful if you could give my > suggestions,advices,tips etc. > > Problem: > I have a skinned (it has a skeleton, it is based on bones) hand model in a > DAE file. The model does not contain any keyframes or animation. > I want to import this hand into my OSG application and be able to move the > fingers independently using the k/b. The movement of the fingers is simple: > only rotation around an axis. (have your palm wide open and try to make a > fist, each finger rotates around one axis that passes through the joint). > > Solution: > * I load the model normally. > * I get a pointer to a bone(using an osg::NodeVisitor). > * I get osgAnimation::UpdateBone callback for that bone > * I get get the osgAnimation::StackedTransform from that > osgAnimation::UpdateBone > * I push_back() a new osgAnimation::StackedRotateAxisElement (I also store > the pointer somewhere else) to the osgAnimation::StackedTransform > * Then I pass (using the constructor) the previous stored > osgAnimation::StackedRotateAxisTransform pointer to a custom EventHandler > that inherits from osgGA::GUIEventHandler and I add it (the handler) to the > osgViewer (using addEventhandler()). > * Then inside the handler() function of my custom even handler I check for > key presses and then I modify the angle of the > osgAnimation::StackedRotateAxisTransform. > > All the above seem to work fine, but I don't know if this is the right way to > solve this kind of problem. I would appreciate any > comments/suggestions/ideas/tips. > > Thank you very much for your time!
Hi George, if you are directly moving a bone, you could bypass all the transformation system and just replace its update callback with one of yours that should compute the bone position in skeleton space. Check the original osgAnimation::UpdateBone for details. -- Alberto _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
