Hi,
Try manipulator->getMatrix() instead of camera view matrix...
Next, it is possible to have a rotation of the matrix along X of +/- PI/2...
don't know exactly when or why, but this can help...
Vincent.
2008/12/17 olfat ibrahim <olfat_ibra...@yahoo.com>
> thanks again for your help :
>
> but i have another problem :
>
> while( !viewer.done() || !viewer1.done() )
> {
> viewer.getCamera()->getViewMatrixAsLookAt(eye, center, up);
>
> cout << "eye2 " << eye.x() << " " << eye.y() << " " <<
> eye.z() << endl;
> cout << "center " << center.x() << " " << center.y() << " "
> << center.z() << endl;
> cout << "up " << up.x() << " " << up.y() << " " << up.z() <<
> endl;
>
> osg::Matrixd m(viewer.getCamera()->getViewMatrix());
>
> mt->setMatrix(osg::Matrix::translate(eye.x(),eye.y(),eye.z())*
> osg::Matrix::rotate(m.getRotate().inverse()));
>
>
> i tried m.getRotate().inverse() and m.getRotate()
> they rotate the object but i the wrong way they flip it
> does any one have recomendations ??
>
>
>
>
> --- On Wed, 12/17/08, Vincent Bourdier <vincent.bourd...@gmail.com> wrote:
>
> > From: Vincent Bourdier <vincent.bourd...@gmail.com>
> > Subject: Re: [osg-users] my current position
> > To: olfat_ibra...@yahoo.com
> > Date: Wednesday, December 17, 2008, 9:58 AM
> > You can do it using different things:
> >
> > * You get eye, center, up . With theses vector, you can
> > compute the front,
> > up, side vectors of the camera, an so compute the rotation.
> > (eye is camera position, center is the point the camera
> > look at)
> >
> > * You can get the matrix from the manipulator, and
> > getRotation from it. You
> > will have the quaternion representing the rotation. (or
> > rotation inverse, I
> > don't remember)
> >
> > * you can get the matrix from manipulator, and use
> > getFrontVector(...),
> > getSidevector() and getUpVector() from it. After that, just
> > compute the
> > rotation.
> >
> > Vincent.
> >
> >
> > 2008/12/17 olfat ibrahim <olfat_ibra...@yahoo.com>
> >
> > > you were right thank you very much
> > > now i need to get the H P R
> > >
> > > by H P R i mean the rotation arround x ,y , z axis .
> > >
> > >
> > > i tried the three functions in the following mannare :
> > >
> > > osg::Vec3f eye;
> > > osg::Vec3f center;
> > > osg::Vec3f up;
> > >
> > > osg::Vec3f eye1;
> > > osg::Vec3f center1;
> > > osg::Vec3f up1;
> > >
> > > osg::Vec3f position;
> > > osg::Matrixd
> > m(keyswitchManipulatorL->getCoordinateFrame(position));
> > >
> > > while( !viewer.done() || !viewer1.done() )
> > > {
> > > cameraL->getViewMatrixAsLookAt(eye1,
> > center1, up1);
> > >
> > viewer.getCamera()->getViewMatrixAsLookAt(eye, center,
> > up);
> > > osg::Matrixd
> > >
> > m(keyswitchManipulatorL->getCoordinateFrame(position));
> > > // cout << position.x <<
> > position.y << position.z << endl;
> > > cout << "eye " <<
> > position.x() << " " << position.y()
> > << " "
> > > << position.z() << endl;
> > >
> > > cout << "eye " <<
> > eye.x() << " " << eye.y() <<
> > " " <<
> > > eye.z() << endl;
> > > cout << "center "
> > << center.x() << " " <<
> > center.y() << " "
> > > << center.z() << endl;
> > > cout << "up " <<
> > up.x() << " " << up.y() <<
> > " " << up.z() <<
> > > endl;
> > >
> > >
> > > cout << "eye " <<
> > eye1.x() << " " << eye1.y() <<
> > " " <<
> > > eye1.z() << endl;
> > > cout << "center "
> > << center1.x() << " " <<
> > center1.y() << "
> > > " << center1.z() << endl;
> > > cout << "up " <<
> > up1.x() << " " << up1.y() <<
> > " " << up1.z()
> > > << endl;
> > > // fire off the cull and draw traversals of the
> > scene.
> > > viewer.frame();
> > > }
> > >
> > > can any ong give me ideas ??
> > >
> > >
> > > --- On Wed, 12/17/08, Vincent Bourdier
> > <vincent.bourd...@gmail.com> wrote:
> > >
> > > > From: Vincent Bourdier
> > <vincent.bourd...@gmail.com>
> > > > Subject: Re: [osg-users] my current position
> > > > To: olfat_ibra...@yahoo.com, "OpenSceneGraph
> > Users" <
> > > osg-users@lists.openscenegraph.org>
> > > > Date: Wednesday, December 17, 2008, 9:37 AM
> > > > Hi,
> > > >
> > > > 2008/12/17 olfat ibrahim
> > <olfat_ibra...@yahoo.com>
> > > >
> > > > >
> > > > >
> > > > >
> > > > > --- On Wed, 12/17/08, olfat ibrahim
> > > > <olfat_ibra...@yahoo.com> wrote:
> > > > >
> > > > > > From: olfat ibrahim
> > > > <olfat_ibra...@yahoo.com>
> > > > > > Subject: my current position
> > > > > > To: "OSG"
> > > > <osg-users@lists.openscenegraph.org>
> > > > > > Date: Wednesday, December 17, 2008,
> > 9:01 AM
> > > > > > i am using keyswitchManipulator :
> > > > > >
> > > > > > i need to print my current location
> > while iam
> > > > driving in
> > > > > > the scene :
> > > > > >
> > > > > > i tried the functions :
> > > > > >
> > > > > > keyswitchManipulatorL->getMatrix()
> > > > > >
> > viewer.getCamera()->getViewMatrixAsLookAt(eye,
> > > > center,
> > > > > > up)
> > > >
> > > >
> > > > eye is camera position.
> > > >
> > > >
> > > > >
> > > > > > cameraL->getViewMatrixAsLookAt(eye,
> > center,
> > > > up)
> > > > > >
> > > > > > all of those does not get me my moving
> > statuse .
> > > > > > i need my x,y,z and h,p,r current
> > position ;
> > > > > >
> > > >
> > > >
> > > > Are you sure you get the position each frame ?
> > because
> > > > theses functions will
> > > > give you
> > > > vector copy, so if you don't get them each
> > frame, they
> > > > will not change.
> > > >
> > > > What do you meen by h,r,p ? second camera
> > position ?
> > > >
> > > > Vincent.
> > > >
> > > >
> > > > > > is there a function should i call to
> > get me what
> > > > i need ?
> > > > > >
> > > > > > thanks
> > > > >
> > > > >
> > > > >
> > > > >
> > _______________________________________________
> > > > > osg-users mailing list
> > > > > osg-users@lists.openscenegraph.org
> > > > >
> > > >
> > >
> >
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> > > > >
> > >
> > >
> > >
> > >
>
>
>
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