Thank you, Nathan. It solves my problem.<br><br><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Tuesday, March 23, 2021 at 12:14:59 PM UTC-6 nmiel...@gmail.com wrote:<br/></div><blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr">Paul,<div><br></div><div>Looking at the OSG Viewer.cpp code, the run() function contains this code:</div><div> if (!getCameraManipulator() && getCamera()->getAllowEventFocus())<br></div> {<br> setCameraManipulator(new osgGA::TrackballManipulator());<br> }<div><br></div><div>Therefore, by adding this line before viewer.frame() is called makes the spheres appear as you expected:</div><div> viewer.setCameraManipulator(new osgGA::TrackballManipulator());</div><div><br></div><div>-Nathan</div><div><br></div></div><br><div class="gmail_quote"></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Mar 21, 2021 at 5:31 PM 'Paul Jurczak' via OpenSceneGraph Users <<a href data-email-masked rel="nofollow">osg-...@googlegroups.com</a>> wrote:<br></div></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I'm just starting with OSG. I would like this (or similar) code: <div><br></div><div><div><div><div> int main() {</div><div> osgViewer::Viewer viewer;</div><div> osg::Geode* geode = new osg::Geode();</div><div> </div><div> viewer.setSceneData(geode);</div><div> geode->addDrawable(new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(0, 0, 0), 1)));</div><div> </div><div> viewer.frame();</div><div> this_thread::sleep_for(seconds(2));</div><div> </div><div> geode->addDrawable(new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(2, 0, 0), 1)));</div><div> </div><div> return viewer.run();</div><div> }</div></div></div></div><div><br></div><div>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?<br></div>
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