it is easy let say your point is osg::Vec3(x,y,z) and by default your arrow is poining up osg::Vec3(0,0,1), then
osg::Vec3 point(x,y,z) osg::Node* arrowPointingUp = .... osg::Quat q; osg::Vec3 a = point. a.normalize(); q.makeRotate(osg::Vec3(0,0,1),a); osg::MatrixTransform* mxt = new osg::MatrixTransform; mxt->addChild(arrowPointingUp); mxt->setMatrix(osg::Matrix::rotate(q)); -Nick On Tue, Apr 20, 2010 at 4:06 PM, Lv Qing <[email protected]> wrote: > Hi, > > I have create a arrow up to the sky ,its position is OSG::Vec3(x,y,z),its > rotation is osg::quat quat1(osg::degreetoradians(90.0)*osg::Vec3(0,0,1)). > > > I ｊｕｓｔ ｗａｎｔ ｔｏ rotate ｔｈｉｓ arrow ，ｍａｋｅ ｉｔ ｐｏｉｎｔ ｔｏ ａｎｏｔｈｅｒ > point（ｏｓｇ：：Ｖｅｃ３（ｘ１，ｙ１，ｚ１））． > > > > Thank you! > > Cheers, > Lv > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=27017#27017 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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