Meshes with non-animated skeletons had an animation group wrongly added

Fixed.

Viewer/src/model/viewerModel.ts

@@ -242,12 +242,16 @@ export class ViewerModel implements IDisposable {
         if (this.skeletons.length) {
             this.skeletons.forEach((skeleton, idx) => {
                 let ag = new AnimationGroup("animation-" + idx);
+                let add = false;
                 skeleton.getAnimatables().forEach(a => {
                     if (a.animations[0]) {
                         ag.addTargetedAnimation(a.animations[0], a);
+                        add = true;
                     }
                 });
-                this.addAnimationGroup(ag);
+                if (add) {
+                    this.addAnimationGroup(ag);
+                }
             });
         }
 

dist/preview release/what's new.md

@@ -85,6 +85,7 @@
 - Animation blending was always set to true, ignoring configuration [#4412](https://github.com/BabylonJS/Babylon.js/issues/4412) ([RaananW](https://github.com/RaananW))
 - Animation navbar now updates correctly when a new model is loaded [#4441](https://github.com/BabylonJS/Babylon.js/issues/4441) ([RaananW](https://github.com/RaananW))
 - Non-normalized meshes didn't center and focus correctly ([RaananW](https://github.com/RaananW))
+- Meshes with skeletons could have incorrect animations ([RaananW](https://github.com/RaananW))
 
 ### Loaders