restructure embedded animations to allow simultaneous play

example/assets/cube.blend

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:9fb09944d65a155fc5b6522f296dd875df02fc2944733a35eb09bec23bbabdcd
-size 813192
+oid sha256:4a3a6b8b48db5d5e71ecd774629cfea00bcd75d4cf1462cb58448e1825c89815
+size 813688

example/lib/main.dart

@@ -21,6 +21,7 @@ class _MyAppState extends State<MyApp> {
 
   final weights = List.filled(255, 0.0);
   List<String> _targets = [];
+  List<String> _animationNames = [];
   bool _loop = false;
 
   @override
@@ -69,11 +70,13 @@ class _MyAppState extends State<MyApp> {
                       }),
                   ElevatedButton(
                       child: const Text('load cube GLB'),
-                      onPressed:_cube != null ? null : () async {
+                      onPressed:() async {
                         _cube = await _filamentController
                             .loadGlb('assets/cube.glb');
-                        print(await _filamentController
-                            .getAnimationNames(_cube!));
+                        
+                        _animationNames = 
+                        await _filamentController
+                            .getAnimationNames(_cube!);
                       }),
                     ElevatedButton(
                       child: const Text('load cube GLTF'),
@@ -111,8 +114,12 @@ class _MyAppState extends State<MyApp> {
                             .applyWeights(_cube!, List.filled(8, 0));
                       }),
                   ElevatedButton(
-                      onPressed: () =>
-                          _filamentController.playAnimation(_cube!, 0, loop: _loop),
+                      onPressed: () {
+                        _animationNames.asMap().forEach((idx, element) {
+                          _filamentController.playAnimation(_cube!, idx, loop: _loop);                          
+                        });
+
+                      },
                       child: const Text('play animation')),
                   ElevatedButton(
                       onPressed: () {