Thank you for reply
..now I can change the position of the camera.
I write here how I change the position
hope it can help:
ChangePosition (osg::Node *node){
const osg::BoundingSphere& boundingSphere= node->getBound();
osg::Matrix myviewMatrix;
osg::Vec3 eye = boundingSphere._center+osg::Vec3( 0.0f,-3.5f *
boundingSphere._radius, 0.0f);
osg::Vec3 center = boundingSphere._center;
osg::Vec3 up = osg::Vec3(0.0f,0.0f,1.0f);
myviewMatrix.makeLookAt(eye,center,up);
this->GetViewer()->setView(myviewMatrix);
}
Thanks!!!
Matteo
---------- Initial Header -----------
>From : [EMAIL PROTECTED]
To : "osg users" [email protected]
Cc :
Date : Wed, 20 Jun 2007 16:29:35 +0200 (MEST)
Subject : Re: [osg-users] Change camera position
> Not sure if working on 2.0, but I' ve used:
>
> const osg::BoundingSphere& bs = _avatar->getBound();
> osg::Matrix myviewMatrix;
> myviewMatrix.makeLookAt(
> _curr_position + osg::Vec3(0.0,-4.0*bs.radius(),20.0f*bs.radius()),
> _curr_position,
> osg::Vec3(0.0f,0.0f,1.0f));
> _topviewCamera->setViewMatrix(myviewMatrix);
>
> To have a camera (_topviewCamera) following an object (_avatar) from
> sligtly above
>
> Hope it help
>
> Matteo Campana wrote:
>
> >Dear all...
> >I´m a new osg user and probably this is a topic yet discussed in the
> >newsletter...I took a look in the archive but I did not solved my problem.
> >
> >I have a scene with lots of drawable...
> >I need to set the position of the camera in order to look at one single
> >drawable....
> >as example...by a GUI I select the name of the drawable and it automatically
> >should move to that object.
> >
> >Is there a camera function that automatically set the camera position simply
> >passing the node of the object to be visualized?...or a sort of fly to
> >function?
> >
> >My idea is to first get the bound of the node
> >
> >const osg::BoundingSphere& boundingSphere=animationNode->getBound();
> >
> >and then set the camera position using this bound....but...I exactly don´t
> >know how to do that...
> >
> >This topic was discussed in the mail with title "Set camera position
> >programatically".
> >In that mail the solution is to use this function
> >
> >osg::Camera* camera = SceneView()->getCamera();
> >camera->setLookAt( eye, center, up );
> >
> >and then Go through all manipulators and update the camera position:
> >
> > CameraManipList::iterator it;
> > osgGLUT::GLUTEventAdapter ea;
> >
> > ViewportList::iterator viewport = _viewportList.begin();
> > for(;viewport != _viewportList.end(); viewport++) {
> > for(it = (*viewport)._cameraManipList.begin(); it !=
> >(*viewport)._cameraManipList.end();it++) {
> > osgGA::TrackballManipulator *tm =
> >dynamic_cast<osgGA::TrackballManipulator *>(it->get());
> > if (tm)
> > tm->init(ea, *this);
> > }
> > }
> >
> >This is exactly what I need...but the "setLookAt" method it doesn´t exist
> >anymore in my osg version.
> >
> >How can I do that?..is this the only way?
> >
> >Thank you!!!!
> >
> >Matteo
> >
> >_______________________________________________
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> >http://openscenegraph.net/mailman/listinfo/osg-users
> >http://www.openscenegraph.org/
> >
> >
> >
> >
>
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>
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