OK, thank you very much.
Maia
robertosfield wrote:
> Hi Maia,
>
> The FrameStamo::getReferenceTime() is the reference time for the
> current frame, it's updated during the viewer.advance() and isn't
> updated till the next advance(). advance() is called as the first
> part of the viewer.frame().
>
> Robert.
>
> On 11 June 2012 19:12, Maia Randria
> <> wrote:
>
> > Hi,
> >
> > I'd like to know what would be the difference between:
> > viewer.getViewerFrameStamp()->getReferenceTime();
> >
> > and
> > osg::Timer::instance()->delta_m(startTick,endTick)
> >
> > in the following codes:
> >
> >
> > Code:
> >
> > int main( int argc, char** argv )
> > {
> > /* Add models to the scene */
> > osg::ref_ptr<osg::Node> model = osgDB::readNodeFile( "cessna.osg" );
> >
> > if(model == NULL)
> > {
> > osg::notify( osg::FATAL ) << "Unable to load data file.
> > Exiting." << std::endl;
> > return 1;
> > }
> >
> > /* create the scene graph */
> > osg::ref_ptr<osg::Group> root = new osg::Group;
> > root->addChild( model.get() );
> >
> > /* view the scene */
> > osgViewer::Viewer viewer;
> >
> > /* set scene data */
> > viewer.setSceneData( root.get() );
> >
> > // take start time
> > osg::Timer_t startTick = osg::Timer::instance()->tick();
> >
> > // Run the viewer
> > viewer.run();
> >
> >
> > // take the end of time after viewing
> > osg::Timer_t endTick = osg::Timer::instance()->tick();
> >
> > // time elapsed since osgviewer started running and the model is
> > displayed on the screen
> > double t = viewer.getFrameStamp()->getReferenceTime();
> >
> > //display elapsed times
> > cout << " With osg::Timer_t, completed in
> > "<<osg::Timer::instance()->delta_m(startTick,endTick)<< " milliseconds"
> > <<endl;
> > cout << " With viewer.getFrameStamp()->getReferenceTime = " <<
> > t*1000 << " milliseconds" << endl;
> >
> > }
> >
> >
> >
> >
> > I got very different values, e.g.:
> >
> > With osg::Timer_t = 2036.44 ms
> > With viewer.getFrameStamp() = 1887.5 ms
> >
> > Thank you very much,
> >
> > Maia
> >
> >
> > robertosfield wrote:
> >
> > > Hi Utkarsh,
> > >
> > > viewer.getViewerFrameStamp()->getReferenceTime();
> > >
> > > Robert.
> > >
> > > On 2 May 2012 17:27, Utkarsh Patankar <> wrote:
> > >
> > >
> > > > Hi,
> > > >
> > > > In an OSG application, is there any way to find out how much time has
> > > > elapsed since osgviewer started running? I don't want to use any
> > > > external time based functions.
> > > >
> > > > Thank you!
> > > >
> > > > Cheers,
> > > > Utkarsh
> > > >
> > > > ------------------
> > > > Read this topic online here:
> > > > http://forum.openscenegraph.org/viewtopic.php?p=47508#47508
> > > >
> > > >
> > > >
> > > >
> > > >
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> > > >
> > > >
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> >
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> >
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