Paul,
Looking at the OSG Viewer.cpp code, the run() function contains this code:
if (!getCameraManipulator() && getCamera()->getAllowEventFocus())
{
setCameraManipulator(new osgGA::TrackballManipulator());
}
Therefore, by adding this line before viewer.frame() is called makes the
spheres appear as you expected:
viewer.setCameraManipulator(new osgGA::TrackballManipulator());
-Nathan
On Sun, Mar 21, 2021 at 5:31 PM 'Paul Jurczak' via OpenSceneGraph Users <
[email protected]> wrote:
> I'm just starting with OSG. I would like this (or similar) code:
>
> int main() {
> osgViewer::Viewer viewer;
> osg::Geode* geode = new osg::Geode();
>
> viewer.setSceneData(geode);
> geode->addDrawable(new osg::ShapeDrawable(new
> osg::Sphere(osg::Vec3(0, 0, 0), 1)));
>
> viewer.frame();
> this_thread::sleep_for(seconds(2));
>
> geode->addDrawable(new osg::ShapeDrawable(new
> osg::Sphere(osg::Vec3(2, 0, 0), 1)));
>
> return viewer.run();
> }
>
> to display the first sphere and after 2s the second sphere, but it
> displays a blank screen for 2s instead and 2 spheres afterwards. What do I
> have to change?
>
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