viewer.loadObject now returns after loading (#187)

packages/viewer/src/modules/ViewerObjectLoader.js

@@ -44,14 +44,13 @@ export default class ViewerObjectLoader {
     let current = 0
     let total = 0
     let viewerLoads = 0
+    let firstObjectPromise = null
     for await ( let obj of this.loader.getObjectIterator() ) {
       if ( first ) {
-        ( async() => {
-          await this.converter.traverseAndConvert( obj, ( o ) => {
-            this.viewer.sceneManager.addObject( o )
-            viewerLoads++
-          } )
-        } )()
+        firstObjectPromise = this.converter.traverseAndConvert( obj, ( o ) => {
+          this.viewer.sceneManager.addObject( o )
+          viewerLoads++
+        } )
         first = false
         total = obj.totalChildrenCount
       }
@@ -59,6 +58,10 @@ export default class ViewerObjectLoader {
       this.viewer.emit( 'load-progress', { progress: current/( total+1 ), id: this.objectId } )
     }
 
+    if ( firstObjectPromise ) {
+      await firstObjectPromise
+    }
+
     if ( viewerLoads === 0 ) {
       console.warn( `Viewer: no 3d objects found in object ${this.objectId}` )
       this.viewer.emit( 'load-warning', { message: `No displayable objects found in object ${this.objectId}.` } )