GLTF Animation Target Override Support

dist/preview release/what's new.md

@@ -8,7 +8,7 @@
 - Added [support for AmmoJS](https://doc.babylonjs.com/how_to/using_the_physics_engine) as a physics plugin (Composite objects, motors, joints) ([TrevorDev](https://github.com/TrevorDev))
   - Added support for soft bodies, which are 3D softbody, 2D cloth and 1D rope, in Ammo physics plugin. [Doc](https://doc.babylonjs.com/how_to/soft_bodies) ([JohnK](https://github.com/BabylonJSGuide))
   - Added support for [Convex Hull Impostor][https://github.com/kripken/ammo.js/blob/master/bullet/src/BulletCollision/CollisionShapes/btConvexHullShape.h] using Ammo.js plugin ([MackeyK24](https://github.com/mackeyk24))
-  - Added AmmoJSPlugin scene file loader [MackeyK24](https://github.com/mackeyk24))
+  - Added AmmoJSPlugin scene file loader ([MackeyK24](https://github.com/mackeyk24))
 - Added support for [WebXR](https://doc.babylonjs.com/how_to/webxr) ([TrevorDev](https://github.com/TrevorDev))
   - Add customAnimationFrameRequester to allow sessions to hook into engine's render loop ([TrevorDev](https://github.com/TrevorDev))
   - camera customDefaultRenderTarget to allow cameras to render to a custom render target (eg. xr framebuffer) instead of the canvas ([TrevorDev](https://github.com/TrevorDev))
@@ -157,6 +157,7 @@
   - Skinned meshes now set an override mesh instead of reparenting to the `__root__` transform node
   - Loaded bones are linked with the transform node created for the corresponding glTF node
 - Improve load performance by blocking material dirtying during load ([bghgary](https://github.com/bghgary))
+- Added animation group target override to support custom animation targets ([MackeyK24](https://github.com/mackeyk24))
 
 ### glTF Serializer
 

loaders/src/glTF/2.0/glTFLoader.ts

@@ -1,7 +1,7 @@
 import { IndicesArray, Nullable } from "babylonjs/types";
 import { Deferred } from "babylonjs/Misc/deferred";
 import { Quaternion, Color3, Vector3, Matrix } from "babylonjs/Maths/math";
-import { LoadFileError, IFileRequest, Tools } from "babylonjs/Misc/tools";
+import { LoadFileError, IFileRequest, IAnimatable, Tools } from "babylonjs/Misc/tools";
 import { Camera } from "babylonjs/Cameras/camera";
 import { FreeCamera } from "babylonjs/Cameras/freeCamera";
 import { AnimationGroup } from "babylonjs/Animations/animationGroup";
@@ -1149,7 +1149,7 @@ export class GLTFLoader implements IGLTFLoader {
         });
     }
 
-    private _loadAnimationChannelAsync(context: string, animationContext: string, animation: IAnimation, channel: IAnimationChannel, babylonAnimationGroup: AnimationGroup): Promise<void> {
+    private _loadAnimationChannelAsync(context: string, animationContext: string, animation: IAnimation, channel: IAnimationChannel, babylonAnimationGroup: AnimationGroup, animationTargetOverride: Nullable<IAnimatable> = null): Promise<void> {
         if (channel.target.node == undefined) {
             return Promise.resolve();
         }
@@ -1289,8 +1289,13 @@ export class GLTFLoader implements IGLTFLoader {
                 const babylonAnimation = new Animation(animationName, targetPath, 1, animationType);
                 babylonAnimation.setKeys(keys);
 
-                targetNode._babylonTransformNode!.animations.push(babylonAnimation);
-                babylonAnimationGroup.addTargetedAnimation(babylonAnimation, targetNode._babylonTransformNode!);
+                if (animationTargetOverride != null) {
+                    animationTargetOverride.animations.push(babylonAnimation);
+                    babylonAnimationGroup.addTargetedAnimation(babylonAnimation, animationTargetOverride);
+                } else {
+                    targetNode._babylonTransformNode!.animations.push(babylonAnimation);
+                    babylonAnimationGroup.addTargetedAnimation(babylonAnimation, targetNode._babylonTransformNode!);
+                }
             }
         });
     }