Hi, Robert:
is there any limit on calling setHomePosition and computeHomePosition()? I have taken a try, but it didn't works. xiaodong On Mon, Mar 3, 2008 at 5:23 PM, Robert Osfield <[EMAIL PROTECTED]> wrote: > Hi Xiaodong, > > Could it be that you are looking for the camera manipulator > setHomePosition or computeHomePosition method? i.e. > > viewer.getCamaraManipulator()->setHomePosition(...); > > Robert. > > > On Mon, Mar 3, 2008 at 2:35 AM, Wu Xiaodong <[EMAIL PROTECTED]> > wrote: > > > > Hi, I am freshman in OpenSceneGrapph. Now I have some issue on updating > the > > Camera when the Geode under it was updated. > > > > the details of the issue is as following. > > > > 1st step. I build a viewer and its scene graph with only one > osg::Geometry > > which contains nothing. and set a TrackballManipulator to the viewer's > > camera; > > > > osg::ref_ptr<osgGA::TrackballManipulator> trackBall = new > > osgGA::TrackballManipulator; > > setCameraManipulator( trackBall.get() ); > > 2nd step. I update the one Geometry by a object of the class derived > from > > the Geometry node's UpdateCallBack class; > > > > the default track ball center seems to be the (0,0,0); when the Gemetry > is > > updated, the Geometry node's center is changed into (x0,y0,z0); but the > > track ball rotate around the vertex ( 0,0,0). How can I make it rotate > > around the (x0,y0,z0 ); > > > > I read the OSG's reference docs, may I can achieve it by > > setPreDrawCallback (DrawCallback *cb) . > > > > Is there any advice about the application above, Thanks. > > > > Xiaodong > Wu > > > > > > > > > > > > _______________________________________________ > > osg-users mailing list > > osg-users@lists.openscenegraph.org > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- 吴晓东
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