ImageSequence example

main.cxx

#include <osgViewer/Viewer>
#include <osgEarth/Notify>
#include <osgEarth/EarthManipulator>
#include <osgEarth/MapNode>
#include <osg/ImageSequence>
#include <osgDB/ReadFile>
#include <osgEarth/ImageLayer>

using namespace osgEarth;
using namespace osgEarth::Util;

class SequenceLayer : public ImageLayer
{
public:
    struct Options : public ImageLayer::Options {
        META_LayerOptions(osgEarth, Options, ImageLayer::Options);
        //virtual Config getConfig() const { return ImageLayer::Options::getConfig(); }
    private:
        void fromConfig(const Config&) { }
    };

    META_Layer(osgEarth, SequenceLayer, Options, ImageLayer, SequenceLayer);

    void init() override {
        ImageLayer::init();
        _image1 = osgDB::readRefImageFile("../data/icon.png");
        _image2 = osgDB::readRefImageFile("../data/placemark32.png");
        setProfile(Profile::create(Profile::GLOBAL_GEODETIC));
        setAsyncLoading(true);
    }

    GeoImage createImageImplementation(const TileKey& key, ProgressCallback* c) const override {
        osg::ImageSequence* seq = new osg::ImageSequence();
        seq->addImage(_image1);
        seq->addImage(_image2);
        seq->setLoopingMode(seq->LOOPING);
        seq->setLength(2.0);
        seq->play();
        return GeoImage(seq, key.getExtent());
    }

    osg::ref_ptr<osg::Image> _image1, _image2;
};

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

    osg::ArgumentParser arguments(&argc,argv);
    osgViewer::Viewer viewer(arguments);
    viewer.setCameraManipulator( new EarthManipulator(arguments) );

    osg::ref_ptr<Map> map = new Map();
    map->addLayer(new SequenceLayer());
    auto mapNode = new MapNode(map.get());

    viewer.setSceneData( mapNode );
    return viewer.run();
}