In your example you are using getWorldMatrices.
I know this function, thanks... I and Robert were talking about it.
But what I simply need is :
with a node, I need its position (absolute/world coordinates), and its
orientation (in the world system coordinates).
How can I do it ?
(Sorry, I'm not very understandable...)
Thanks,
Regard.
Vincent.
2008/3/27, Alberto Luaces <[EMAIL PROTECTED]>:
>
> Sorry, I don't get what you exactly are looking for. Would this example
> help?
> It calculates the position of a node in world coordinates:
>
> #include <osg/Node>
> #include <osg/Group>
> #include <osg/Matrix>
> #include <osg/MatrixTransform>
>
> #include <iostream>
>
> int main()
> {
> osg::Group *root;
> osg::Node *n;
> osg::MatrixTransform *m1, *m2;
>
> root = new osg::Group;
> n = new osg::Node;
> m1 = new osg::MatrixTransform( osg::Matrix::translate(osg::Vec3
> (0.0,10.0,0.0)));
> m2 = new osg::MatrixTransform( osg::Matrix::translate(osg::Vec3
> (10.0,10.0,-5.0)));
>
> // root->m1->m2->n
>
> root->addChild(m1);
> m1->addChild(m2);
> m2->addChild(n);
>
> osg::MatrixList ml = n->getWorldMatrices();
>
> for(int i=0; i<4; i++)
> {
> for(int j=0; j<4; j++)
> {
> std::cout << ml[0](j,i) << "\t";
> }
> std::cout << "\n";
> }
>
> return 0;
> }
>
>
> El Jueves 27 Marzo 2008ES 16:24:47 Vincent Bourdier escribió:
>
> > Hi Alberto
> >
> > Thanks for help, I understand the instance problem... If all is good in
> my
> > situation I would not have many instances of the same node... so I think
> it
> > will be more simple...
> >
> > Because my problem is more recent, I ask a second question : To get this
> > node's position (absolute ), if I understand well I must use something
> like
> >
> >
> http://www.openscenegraph.org/projects/osg/wiki/Support/Tutorials/CameraCon
> >trolFindingWorldCoordinates
> >
> > There is no other way ?
> >
> > Thanks,
> >
> > Regards.
> > vincent.
> >
> > 2008/3/27, Alberto Luaces <[EMAIL PROTECTED]>:
> > > El Jueves 27 Marzo 2008ES 15:24:48 Vincent Bourdier escribió:
> > > > but if I want to get the world Matrix, the one which represent the
> > >
> > > node's
> > >
> > > > position and translation in absolute system, how can I do ? Which
> > > > matrix
> > >
> > > I
> > >
> > > > have to get ?
> > >
> > > If you have several wold matrices, it means that you have instantiated
> a
> > > node
> > > several times. Only you know in what instance you are interested.
> Think
> > > about
> > > the four wheels of a car, there are 4 instances of the same node, the
> > > wheel
> > > mesh.
> > >
> > > _______________________________________________
> > > osg-users mailing list
> > > [email protected]
> > >
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
>
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