Вы можете собрать URN документа и GUID модели в процессе загрузки:
function load(urn) {
viewerApp.loadDocument(
'urn:' + urn,
function onDocumentLoadSuccess(doc) {
const viewables = viewerApp.bubble.search({ 'type': 'geometry' });
if (viewables.length > 0) {
const path = doc.getViewablePath(viewables[0].data);
const viewer = viewerApp.getCurrentViewer();
const options = { /* your options */ };
viewer.loadModel(path, options, function onModelLoadSuccess(model) {
model._myURN = urn;
model._myGUID = viewables[0].data.guid;
});
}
}
);
}