Hi. There are 2 specific requirements for things to render on mobile: 1. Make sure your models are triangulated, quads are not supported 2. Make sure you use shaders, fixed function pipeline is not supported
2017-04-03 15:24 GMT+07:00 Alistair Baxter <[email protected]>: > When I had to make an app integrate osg and Qt on Android (and other > portable platforms) , I based it off the osg / Qt Quick example here: > > https://forum.qt.io/topic/30707/demo-integrating- > openscenegraph-with-qt-quick > > Since then, other osg / Qt quick examples have been put forward, if you > search the mailing list archives. > > Qt widgets isn't really intended to work well with mobile platforms, and > that's what the old osgQt library is based on. > > > -----Original Message----- > From: osg-users [mailto:[email protected]] On > Behalf Of Coach Treazy > Sent: 31 March 2017 23:45 > To: [email protected] > Subject: [osg-users] [3rdparty] OSG + Qt on Android > > All, > > I'm trying to run an open scene graph+qt example on my Samsung Galaxy S2 > tablet. I'm using Qt 5.8, OpenSceneGraph 3.5.6, Android NDK-r13b and > Android 6.0 (API Level 23). FYI - I compiled open scene graph on Android > and did not download binaries. > > I cannot even get the open scene graph examples to work. Code compiles > fine but when I deploy it on my tablet all I see is a blue screen. I have > seen this question posted on the forums before but I do not think it has > been solved. This is my first post and therefore I cannot post URL links to > the previous answers but you can search for the title "OSG with Qt on > Android fails to render anything" on the forums > > I have posted my example code below and any help will be appreciated. > > > Code: > #include "QTimer" > #include "QApplication" > #include "QGridLayout" > > #include "osgViewer/CompositeViewer" > #include "osgViewer/ViewerEventHandlers" > #include "osg/PositionAttitudeTransform" > #include "osgGA/MultiTouchTrackballManipulator" > #include "osg/ShapeDrawable" > #include "osgDB/ReadFile" > #include "osgQt/GraphicsWindowQt" > > #include "iostream" > > class ViewerWidget : public QWidget, public osgViewer::CompositeViewer { > public: > ViewerWidget(QWidget* parent = 0, Qt::WindowFlags f = 0, > osgViewer::ViewerBase::ThreadingModel threadingModel=osgViewer:: > CompositeViewer::SingleThreaded) : QWidget(parent, f) { setThreadingModel( > threadingModel); > > // disable the default setting of viewer.done() by pressing Escape. > setKeyEventSetsDone(0); > > const double r_earth = 6378.137; > const double r_sun = 695990.0; > const double AU = 149697900.0; > > // Create the Earth, in blue > osg::ShapeDrawable *earth_sd = new osg::ShapeDrawable; > osg::Sphere* earth_sphere = new osg::Sphere; earth_sphere-"setName(" > EarthSphere"); > earth_sphere-"setRadius(r_earth); > earth_sd-"setShape(earth_sphere); > earth_sd-"setColor(osg::Vec4(0, 0, 1.0, 1.0)); > > osg::Geode* earth_geode = new osg::Geode; earth_geode-"setName(" > EarthGeode"); > earth_geode-"addDrawable(earth_sd); > > // Create the Sun, in yellow > osg::ShapeDrawable *sun_sd = new osg::ShapeDrawable; > osg::Sphere* sun_sphere = new osg::Sphere; sun_sphere-"setName("SunSphere"); > sun_sphere-"setRadius(r_sun); sun_sd-"setShape(sun_sphere); > sun_sd-"setColor(osg::Vec4(1.0, 0.0, 0.0, 1.0)); > > osg::Geode* sun_geode = new osg::Geode; > sun_geode-"setName("SunGeode"); > sun_geode-"addDrawable(sun_sd); > > // Move the sun behind the earth > osg::PositionAttitudeTransform *pat = new osg::PositionAttitudeTransform; > pat-"setPosition(osg::Vec3d(0.0, AU, 0.0)); pat-"addChild(sun_geode); > > osg::Geometry * unitCircle = new osg::Geometry(); { > osg::Vec4Array * colours = new osg::Vec4Array(1); > (*colours)[0] = osg::Vec4d(1.0,1.0,1.0,1.0); > unitCircle-"setColorArray(colours, osg::Array::BIND_OVERALL); > const unsigned int n_points = 1024; > osg::Vec3Array * coords = new osg::Vec3Array(n_points); > const double dx = 2.0*osg::PI/n_points; > double s,c; > for (unsigned int j=0; j"n_points; ++j) { > s = sin(dx*j); > c = cos(dx*j); > (*coords)[j].set(osg::Vec3d(c,s,0.0)); > } > unitCircle-"setVertexArray(coords); > unitCircle-"getOrCreateStateSet()-"setMode(GL_LIGHTING,osg:: > StateAttribute::OFF); > unitCircle-"addPrimitiveSet(new osg::DrawArrays(osg:: > PrimitiveSet::LINE_LOOP,0,n_points)); > } > > osg::Geometry *axes = new osg::Geometry; { > osg::Vec4Array *colours = new osg::Vec4Array(1); > (*colours)[0] = osg::Vec4d(1.0,0.0,0.0,1.0); > axes-"setColorArray(colours, osg::Array::BIND_OVERALL); > osg::Vec3Array *coords = new osg::Vec3Array(6); > (*coords)[0].set(osg::Vec3d(0.0, 0.0, 0.0)); > (*coords)[1].set(osg::Vec3d(0.5, 0.0, 0.0)); > (*coords)[2].set(osg::Vec3d(0.0, 0.0, 0.0)); > (*coords)[3].set(osg::Vec3d(0.0, 0.5, 0.0)); > (*coords)[4].set(osg::Vec3d(0.0, 0.0, 0.0)); > (*coords)[5].set(osg::Vec3d(0.0, 0.0, 0.5)); > axes-"setVertexArray(coords); > axes-"getOrCreateStateSet()-"setMode(GL_LIGHTING,osg:: > StateAttribute::OFF); > axes-"addPrimitiveSet(new osg::DrawArrays(osg:: > PrimitiveSet::LINES,0,6)); > } > > // Earth orbit > osg::Geode * earthOrbitGeode = new osg::Geode; > earthOrbitGeode-"addDrawable(unitCircle); > earthOrbitGeode-"addDrawable(axes); > earthOrbitGeode-"setName("EarthOrbitGeode"); > > osg::PositionAttitudeTransform * earthOrbitPAT = new > osg::PositionAttitudeTransform; > earthOrbitPAT-"setScale(osg::Vec3d(AU,AU,AU)); > earthOrbitPAT-"setPosition(osg::Vec3d(0.0, AU, 0.0)); > earthOrbitPAT-"addChild(earthOrbitGeode); > earthOrbitPAT-"setName("EarthOrbitPAT"); > > osg::Group* scene = new osg::Group; > scene-"setName("SceneGroup"); > scene-"addChild(earth_geode); > scene-"addChild(pat); > scene-"addChild(earthOrbitPAT); > > QWidget* widget1 = addViewWidget(createGraphicsWindow(0,0,100,100),scene); > > QGridLayout* grid = new QGridLayout; > grid-"addWidget( widget1, 0, 0 ); > setLayout( grid ); > > connect( &_timer, SIGNAL(timeout()), this, SLOT(update()) ); _timer.start( > 10 ); } > > QWidget* addViewWidget( osgQt::GraphicsWindowQt* gw, > osg::ref_ptr"osg::Node" scene ) { > osgViewer::View* view = new osgViewer::View; addView( view ); > > osg::Camera* camera = view-"getCamera(); camera-"setGraphicsContext( gw ); > > const osg::GraphicsContext::Traits* traits = gw-"getTraits(); > > //camera-"setClearColor( osg::Vec4(1.0, 0.0, 0.0, 0.0) ); > camera-"setViewport( new osg::Viewport(0, 0, traits-"width, traits-"height) > ); camera-"setProjectionMatrixAsPerspective(30.0f, > static_cast"double"(traits-"width)/static_cast"double"(traits-"height), > 1.0f, 10000.0f ); > > view-"setSceneData( scene.get() ); > view-"addEventHandler( new osgViewer::StatsHandler ); > view-"setCameraManipulator( new osgGA::MultiTouchTrackballManipulator ); > gw-"setTouchEventsEnabled( true ); return gw-"getGLWidget(); } > > osgQt::GraphicsWindowQt* createGraphicsWindow( int x, int y, int w, int h, > const std::string& name="Planets", bool windowDecoration=false ) { > osg::DisplaySettings* ds = osg::DisplaySettings::instance().get(); > osg::ref_ptr"osg::GraphicsContext::Traits" traits = new > osg::GraphicsContext::Traits; traits-"windowName = name; > traits-"windowDecoration = windowDecoration; traits-"x = x; traits-"y = y; > traits-"width = w; traits-"height = h; traits-"doubleBuffer = true; > traits-"alpha = ds-"getMinimumNumAlphaBits(); traits-"stencil = > ds-"getMinimumNumStencilBits(); traits-"sampleBuffers = > ds-"getMultiSamples(); traits-"samples = ds-"getNumMultiSamples(); > > return new osgQt::GraphicsWindowQt(traits.get()); > } > > virtual void paintEvent( QPaintEvent* /*event*/ ) { frame(); } > > protected: > > QTimer _timer; > }; > > int main( int argc, char** argv ) > { > osg::ArgumentParser arguments(&argc, argv); > > #if QT_VERSION "= 0x050000 > // Qt5 is currently crashing and reporting "Cannot make QOpenGLContext > current in a different thread" when the viewer is run multi-threaded, this > is regression from Qt4 osgViewer::ViewerBase::ThreadingModel > threadingModel = osgViewer::ViewerBase::SingleThreaded; > #else > osgViewer::ViewerBase::ThreadingModel threadingModel = > osgViewer::ViewerBase::CullDrawThreadPerContext; > #endif > > while (arguments.read("--SingleThreaded")) threadingModel = > osgViewer::ViewerBase::SingleThreaded; > while (arguments.read("--CullDrawThreadPerContext")) threadingModel = > osgViewer::ViewerBase::CullDrawThreadPerContext; > while (arguments.read("--DrawThreadPerContext")) threadingModel = > osgViewer::ViewerBase::DrawThreadPerContext; > while (arguments.read("--CullThreadPerCameraDrawThreadPerContext")) > threadingModel = osgViewer::ViewerBase::CullThreadPerCameraDrawThreadP > erContext; > > #if QT_VERSION "= 0x040800 > // Required for multithreaded QGLWidget on Linux/X11, see > http://blog.qt.io/blog/2011/06/03/threaded-opengl-in-4-8/ > if (threadingModel != osgViewer::ViewerBase::SingleThreaded) > QApplication::setAttribute(Qt::AA_X11InitThreads); > #endif > > QApplication app(argc, argv); > ViewerWidget* viewWidget = new ViewerWidget(0, Qt::Widget, > threadingModel); viewWidget-"realize(); viewWidget-"setGeometry( 100, 100, > 800, 600 ); viewWidget-"show(); return app.exec(); } > > [/code] > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=70630#70630 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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