Hi all,
I make a little "up" of this topic because I'm now looking on it a last time
(I hope)
To be more clear,
I have a difference between getting the transform quat with theses two way :
osg::MatrixList ml = _node->getWorldMatrices();
osg::Matrixd Msum = osg::Matrixd::identity();
for(unsigned int i = 0; i< ml.size() ; i++)
{
Msum *= ml[i];
}
quat = Msum.getRotate();
--------------------------------------------------------------------------------------------------------
osg::PositionAttitudeTransform* pat =
dynamic_cast<osg::PositionAttitudeTransform*>(_node.get());
quat = pat->getAttitude();
Do you know why I don't have the same result ?
Thanks
Vincent.
2008/3/21, Vincent Bourdier <[EMAIL PROTECTED]>:
>
> Hi,
>
> So I've made some tests and now I have some questions about the
> differences between two methods to get tranformations on one node. Is the
> node is a Transform or not, I use two different method to get
> transformations.
>
> In the first method, I get directly the MatrixTransform node, so I can get
> directly the matrix, convert it to Quat and continue...
> In the second method, I get a node, so I make a getWorldMatrices, and make
> a product between all the Matrix of the MatrixList...
>
> If I test on a node, which parent is a MatrixTransform, it doesn't return
> the same result with the two method (with the MatrixTranform as argument for
> the first method and the child of the MatrixTransform as argument of the
> second method)
>
> Is there any explanation for this difference ?
>
> Thanks.
>
> Regard,
> Vincent.
>
>
> 2008/3/21, Vincent Bourdier <[EMAIL PROTECTED]>:
> >
> > Hi Robert,
> >
> > sorry I'm not always very ... understandable, when I try to explain
> > something.
> >
> > I've already tried getWorldMatrices() few days ago, but the result was
> > very different with using one PAT or MT Quat/Matrix...
> >
> > That's why I'm asking if getting the PAT/MT accumulation Quat/Matrices
> > is easy... or not.
> >
> > But if it getWorldMatrices() is the only solution, I'll will try again.
> >
> > Thanks.
> > Vincent.
> >
> > 2008/3/21, Robert Osfield <[EMAIL PROTECTED]>:
> > >
> > > Hi Vincent,
> > >
> > > I'm a bit confused about what you are trying to do, is it just get the
> > > accumulated world matrix at a specific node?
> > >
> > > If so then node::getWorldMatrices() is what you want. This will
> > > return a MatrixList, which will contain none, one or many matrices
> > > given that any node many have none or many parental paths containing
> > > transforms.
> > >
> > > Robert.
> > >
> > >
> > > On Fri, Mar 21, 2008 at 11:03 AM, Vincent Bourdier
> > > <[EMAIL PROTECTED]> wrote:
> > > > Hi all,
> > > >
> > > > I'm trying to get a node's parent as Transform (PAT or
> > > MatrixTransform) but
> > > > I have to get the transformation in ABSOLUTE_RF...
> > > >
> > > > For the moment, I've done a recursive method to get Parent as
> > > Transform. It
> > > > return me the first parent as Tranform it encounter.
> > > >
> > > > I've tried this :
> > > >
> > > > > osg::ref_ptr<osg::MatrixTransform> tmp_pt = new
> > > osg::MatrixTransform;
> > > > > tmp_pt->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
> > > > > tmp_pt->setMatrix(p_mt->getMatrix());
> > > > >
> > > >
> > > > (where p_mt is my RELATIVE MatrixTransform)
> > > >
> > > >
> > > > But the method return to me a MatrixTransform in RELATIVE. It is
> > > possible to
> > > > get the Matrix in Absolute ? without traverse all the scenegraph ?
> > > > Thanks.
> > > >
> > > > Regards,
> > > >
> > > > Vincent.
> > > >
> > >
> > > > _______________________________________________
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> > > > [email protected]
> > > >
> > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> > > >
> > > >
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> > >
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> > >
> >
> >
>
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