Feature with ModelSymbol with model node created from a FeatureSource not displayed

[sebalaig]

Discussed in https://github.com/gwaldron/osgearth/discussions/2311

^{Originally posted by sebalaig July 18, 2023} Hello,

I'm trying to display an OSG geode (in an osg file "arrow.osg") in my map using the Feature and ModelSymbol tools, but this is not working: nothing is visible. I'm missing something but I cannot figure out what's wrong..

Here is my code:

        osgEarth::Style style;
        ModelSymbol* modelSymbol = style.getOrCreate<ModelSymbol>();
        auto* tmp= osgDB::readFile<osg::Geode>("arrow.osg");
        modelSymbol->setModel(tmp);
        modelSymbol->heading() = 50;
        modelSymbol->scale()   = 2;
        modelSymbol->placement() = InstanceSymbol::PLACEMENT_VERTEX;
        modelSymbol->autoScale() = true;

        osg::ref_ptr<osgEarth::PointSet> point = new osgEarth::PointSet(1);
        point->push_back(2.35, 48.85, 50);

        osg::ref_ptr<Feature> feature = new Feature(point, geoSRS, style);
        osg::ref_ptr<FeatureNode> featureNode = new FeatureNode(feature);
        featureNode->setMapNode(mapNode);
        
        mapNode->addChild(featureNode);

That code was ok using previous osgearth version (2.7) but fails with v3.3.

I tested by using osg::Transform to rotate/scale and GeoTransform to set the model position => it ok.

But in my context, I'm in an overload of FeatureSource::createFeatureCursorImplementation, so I have to build features, and it would be easier/cleaner to use osgearth API instead of OSG one's IMHO.

Thank you in advance for your help.

[sebalaig]

It looks like a bug fixed in osgearth 3.4, a duplicate of #2299. I will update my osgearth version and confirm that.

[sebalaig]

It looks like a bug fixed in osgearth 3.4, a duplicate of #2299. I will update my osgearth version and confirm that.

I tested with the master branch @ ed410ee952a9ec9f32a414d8179c3a75f62b0a6c, I confirm that creating a FeatureNode is ok by setting the model of the ModelSymbol.

However, my problem still occurs while creating Features from a FeatureSource::createFeatureCursorImplementation implementation.

[sebalaig]

Hi, can anybody help me about this problem please ? I cannot find any workaround (@gwaldron ?). Thank you in advance for your help 🙏 .

[gwaldron]

Sorry for the delay. Can you try this is the master branch and let us know if it works? If not, can you pls provide a simple cpp to reproduce?

[sebalaig]

Sorry for the delay. Can you try this is the master branch and let us know if it works? If not, can you pls provide a simple cpp to reproduce?

Hi, I still reproduce in main branch. Here is a main trying to display a pointset with a ModelSymbol (red_flag.osg) in Paris :

#include <osgEarth/MapNode>

#include <osgEarth/EarthManipulator>
#include <osgEarth/ExampleResources>

#include <osgEarth/ImageOverlay>
#include <osgEarth/CircleNode>
#include <osgEarth/RectangleNode>
#include <osgEarth/EllipseNode>
#include <osgEarth/PlaceNode>
#include <osgEarth/LabelNode>
#include <osgEarth/LocalGeometryNode>
#include <osgEarth/FeatureNode>
#include <osgEarth/ModelNode>
#include <osgEarth/FeatureSource>
#include <osgEarth/ImageOverlayEditor>
#include <osgEarth/GeometryFactory>
#include <osgEarth/Registry>
#include <osgEarth/TiledFeatureModelLayer>

#include <osgViewer/Viewer>
#include <osgDB/ReadFile>
#include <osgGA/CameraManipulator>

using namespace osgEarth;
using namespace osgEarth::Util;
using namespace osgEarth::Contrib;
using namespace osgEarth::Util;




class TestFeatureSource : public osgEarth::FeatureSource
{
public:
    TestFeatureSource(osgEarth::MapNode *mapNode, const osgEarth::FeatureSource::Options& options = osgEarth::FeatureSource::Options());
    virtual ~TestFeatureSource();

    const osgEarth::FeatureProfile* createFeatureProfile();

    //! Implements the feature cursor creation
    virtual osgEarth::FeatureCursor* createFeatureCursorImplementation(const osgEarth::Query& query, osgEarth::ProgressCallback* progress) override;

    virtual osgEarth::Geometry::Type getGeometryType() const;

private:

    osgEarth::MapNode *_p_mapNode;

    const osgEarth::FeatureSource::Options      _options;
    osgEarth::FeatureSchema        _schema;
    osg::ref_ptr<osgDB::Options>    _dbOptions;
};

TestFeatureSource::TestFeatureSource(MapNode *mapNode, const FeatureSource::Options& options )
    : FeatureSource(new osgEarth::FeatureSource::Options(options), nullptr), _p_mapNode(mapNode), _options( options )
{
    setFeatureProfile(createFeatureProfile());
}

TestFeatureSource::~TestFeatureSource()
{
}

const FeatureProfile* TestFeatureSource::createFeatureProfile()
{
    const Profile* wgs84 = Registry::instance()->getGlobalGeodeticProfile();
    
    GeoExtent extent(wgs84->getSRS(), 2, 48, 3, 49);
    FeatureProfile* profile = new FeatureProfile( extent );
    profile->setTilingProfile( Profile::create("wgs84", extent.xMin(), extent.yMin(), extent.xMax(), extent.yMax()) );
    return profile;
}

FeatureCursor* TestFeatureSource::createFeatureCursorImplementation(const Query& query, ProgressCallback* progress)
{
    FeatureListCursor *listCursor = NULL;

    /* -- Get extent -- */
    if( query.tileKey().isSet() )
    {
        osgEarth::FeatureList features;

        const SpatialReference* geoSRS = _p_mapNode->getMapSRS()->getGeographicSRS();

        osgEarth::Style style;
        ModelSymbol* modelSymbol = style.getOrCreate<ModelSymbol>();
        osg::Node* node = osgDB::readNodeFile("red_flag.osg");
        //osg::Node* node = osgDB::readNodeFile("arrow.osg");

        osgEarth::Registry::shaderGenerator().run(node, "pipo");

        modelSymbol->setModel(node);

        osgEarth::AltitudeSymbol* alt = style.getOrCreate<osgEarth::AltitudeSymbol>();
        alt->clamping() = alt->CLAMP_TO_TERRAIN;
        alt->technique() = alt->TECHNIQUE_DRAPE;
        alt->binding() = alt->BINDING_VERTEX;

        osg::ref_ptr<osgEarth::PointSet> point = new osgEarth::PointSet(1);
        point->push_back(2.35, 48.85);

        osg::ref_ptr<Feature> feature = new Feature(point, geoSRS, style);
        features.push_back( feature );

        listCursor = new FeatureListCursor(features);
    }
    return listCursor;
}

osgEarth::Geometry::Type TestFeatureSource::getGeometryType() const
{
    return osgEarth::Geometry::TYPE_POINTSET;
}

class WindArrowFeatureLayer : public osgEarth::TiledFeatureModelLayer
{
public:
    WindArrowFeatureLayer(osgEarth::TiledFeatureModelLayer::Options* optr, const osgEarth::TiledFeatureModelLayer::Options* optr0);
};

WindArrowFeatureLayer::WindArrowFeatureLayer(Options* optr, const Options* optr0) :
    TiledFeatureModelLayer(optr, optr0)
{
    TiledFeatureModelLayer::init();

    setStyleSheet(new StyleSheet);
}

//------------------------------------------------------------------

int
usage(char** argv)
{
    OE_WARN << "Usage: " << argv[0] << " <earthfile>" << std::endl;
    return -1;
}

//------------------------------------------------------------------

int
main(int argc, char** argv)
{
    osgEarth::initialize();

    osg::Group* root = new osg::Group();

    // try to load an earth file.
    osg::ArgumentParser arguments(&argc, argv);

    osgViewer::Viewer viewer(arguments);
    osg::ref_ptr<EarthManipulator> manipulator = new EarthManipulator();
    viewer.setCameraManipulator(manipulator);
    viewer.setUpViewOnSingleScreen(1);

    // load an earth file and parse demo arguments
    auto node = MapNodeHelper().load(arguments, &viewer);
    if (!node)
        return usage(argv);

    root->addChild(node);

    // find the map node that we loaded.
    MapNode* mapNode = MapNode::get(node);
    if (!mapNode)
        return usage(argv);

    osgEarth::FeatureSource::Options options;
    osg::ref_ptr<TestFeatureSource> source = new TestFeatureSource(mapNode, options);

    osgEarth::TiledFeatureModelLayer::Options layerOpt;
    osg::ref_ptr<WindArrowFeatureLayer> modelLayer = new WindArrowFeatureLayer(new TiledFeatureModelLayer::Options(layerOpt), nullptr);
    modelLayer->setFeatureSource(source);
    modelLayer->setVisible(true);
    modelLayer->setOpacity(1.0);

    /* -- Add to scene -- */
    mapNode->getMap()->addLayer(modelLayer);

    // initialize the viewer:
    viewer.setSceneData(root);

    osgEarth::Viewpoint viewpoint("position",
        2.35,
        48.85,
        0,
        0.0,     // heading_deg
        -90.0,   // pitch_deg
        2000); // range

    manipulator->setViewpoint(viewpoint, 2);

    return viewer.run();
}

It displays a single white point, which look at the middle of the earth (visible in wired mode).

I'm not sur wether if I'm missing something or if this is an osgearth issue. I don't know if I'm using osgEarth::FeatureSource API correctly or not... Thank you in advance for you help !

Best regards

[sebalaig]

Hello, Could you reproduce the issue I describe from the code sample ?

Thank you in advance for your help/feedback. Best regards.

[jasonbeverage]

I've pushed a fix for this to the master, it was an issue with an internal cache attempting to use the URI (which doesn't exist) as a key. Thanks for the example code, it was helpful to track the issue down.

[sebalaig]

Hi @jasonbeverage, You're welcome, thanks for the fix ! However, I updated to get your fix, but I have the same behaviour with my example. Furthermore, if I set a breakpoint in the code you updated (i.e SubstituteModelFilter::process) it is never reached. Am I doing something wrong ? Thank you in advance for your help.

[sebalaig]

Hi to both of you @jasonbeverage & @gwaldron, Do you have any idea of when this issue would be fixed if so ? Thank you in advance for your reply.

Best regards.