Merge pull request #3858 from RaananW/animationGroup-gotoframe

animationGroup go to frame

dist/preview release/what's new.md

@@ -92,7 +92,7 @@
 - SPS solid particle `.pivot` property now also behaves like the standard mesh pivot. Former behavior (particle translation) can be kept with the particle property `.translateFromPivot` set to true ([jbousquie](https://github.com/jbousquie))
 - Texture extension detection in `Engine.CreateTexture` ([sebavan](https://github.com/sebavan))
 - SPS internal temporary vector3 instead of Tmp.Vector3 to avoid possible concurrent uses ([jbousquie](https://github.com/jbousquie))
-- Fixed a bug when calling load on an empty assets manager - [#3739](https://github.com/BabylonJS/Babylon.js/issues/3739). ([RaananW](https://github.com/RaananW))
+- Fixed a bug when calling load on an empty assets manager - [#3739](https://github.com/BabylonJS/Babylon.js/issues/3739) ([RaananW](https://github.com/RaananW))
 - Enabling teleportation in the vr helper class caused a redundant post process to be added ([trevordev](https://github.com/trevordev))
 - (Viewer) Fixed a bug where loading another mesh positioned it incorrectly ([RaananW](https://github.com/RaananW))
 - Scale vr controllers by deviceScale when it is set in VRExperienceHelper ([trevordev](https://github.com/trevordev))

src/Animations/babylon.animationGroup.ts

@@ -59,6 +59,13 @@ module BABYLON {
             return this._targetedAnimations;
         }
 
+        /**
+         * returning the list of animatables controlled by this animation group.
+         */
+        public get animatables(): Array<Animatable> {
+            return this._animatables;
+        }
+
         public constructor(public name: string, scene: Nullable<Scene> = null) {
             this._scene = scene || Engine.LastCreatedScene!;
 
@@ -245,6 +252,25 @@ module BABYLON {
         }
 
         /**
+         * Goes to a specific frame in this animation group
+         * 
+         * @param frame the frame number to go to
+         * @return the animationGroup
+         */
+        public goToFrame(frame: number): AnimationGroup {
+            if (!this._isStarted) {
+                return this;
+            }
+
+            for (var index = 0; index < this._animatables.length; index++) {
+                let animatable = this._animatables[index];
+                animatable.goToFrame(frame);
+            }
+
+            return this;
+        }
+
+        /**
          * Dispose all associated resources
          */
         public dispose(): void {
@@ -258,4 +284,4 @@ module BABYLON {
             }
         }
     }
-}
+}