osgParticle ExplosionEffect unvisible use MatrixTransform

[kinsung]

osgParticle ExplosionEffect unvisible use MatrixTransform, but fine when useing convertLatLongHeightToXYZ to convert coordinate.

// this is fine:
    osg::Vec3 position;

    double x, y, z;
    srs->getEllipsoid()->convertLatLongHeightToXYZ(
        osg::DegreesToRadians(pt.latitude),
        osg::DegreesToRadians(pt.longitude),
        pt.altitude,
        x, y, z);
    position = osg::Vec3(x, y, z);

    osgParticle::ExplosionEffect* explosion = new osgParticle::ExplosionEffect(position, scale, intensity);
    explosion->setTextureFileName(get_app_dir()+"/data3d/images/smoke.rgb");

    osg::Vec3 wind(1.0, 1.0, 1.0);
    explosion->setWind(wind);

    osg::ref_ptr<osg::MatrixTransform> mt = new osg::MatrixTransform;
    mt->addChild( explosion );
    this->addChild( mt );

// this is not fine:
    osg::Vec3 position;
    osgParticle::ExplosionEffect* explosion = new osgParticle::ExplosionEffect(position, scale, intensity);
    explosion->setTextureFileName(get_app_dir()+"/data3d/images/smoke.rgb");

    osg::Vec3 wind(1.0, 1.0, 1.0);
    explosion->setWind(wind);

    osg::ref_ptr<osg::MatrixTransform> mt = new osg::MatrixTransform;
    mt->addChild( explosion );

    osgEarth::GeoPoint gpt(srs, pt.longitude, pt.latitude, pt.altitude, ALTMODE_ABSOLUTE); 
    osg::Matrix matrixLocalToWorld;
    gpt.createLocalToWorld( matrixLocalToWorld );
    osg::Matrix matrix = osg::Matrix::scale(2, 2, 2)*matrixLocalToWorld;
    mt->setMatrix( matrix );

    this->addChild( mt );
'''

[gwaldron]

Does it work without the osg::Marix::scale(2,2,2)? You can also try GeoTransform instead of MatrixTransform.

[kinsung]

Not work: mt->setMatrix( matrixLocalToWorld );

[gwaldron]

No idea. Maybe something in the way that the particle system uses the position data. Perhaps it is ignoring the MT and placing it at position absolutely. You will need to delve into the code to find out.

[kinsung]

Thank you. I close this issue.