[osg-users] rotate a arrow to a point

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

Re: [osg-users] rotate a arrow to a point

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