private void ribbonButton45_Click(object sender, EventArgs e) { if (modelStreetLight == null) { modelStreetLight = new Model(); modelStreetLight.setModelPath( "E:\\OpenSceneGraph\\data\\streetlight.osgb.18000.scale" ); GeoPoint pos = new GeoPoint(); pos.x = 116.3; pos.y = 39.9; pos.z = 1000.0; pos.srs = m_earthMap.getSRS(); modelStreetLight.setPosition(pos); m_earthRoot.addChild( modelStreetLight ); } }