Thank you, Nathan. It solves my problem.
On Tuesday, March 23, 2021 at 12:14:59 PM UTC-6 nmiel...@gmail.com wrote:
> 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 <
> osg-...@googlegroups.com> 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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