add setBoneTransform method

lib/filament_controller.dart

@@ -279,6 +279,12 @@ abstract class FilamentController {
   ///
   Future setBoneAnimation(FilamentEntity entity, BoneAnimationData animation);
 
+  ///
+  /// Sets the local joint transform for the bone at the given index in [entity] for the mesh under [meshName].
+  ///
+  Future setBoneTransform(
+      FilamentEntity entity, String meshName, int boneIndex, Matrix4 data);
+
   ///
   /// Removes/destroys the specified entity from the scene.
   /// [entity] will no longer be a valid handle after this method is called; ensure you immediately discard all references once this method is complete.

lib/filament_controller_ffi.dart

@@ -1160,4 +1160,18 @@ class FilamentControllerFFI extends FilamentController {
 
     return frustum;
   }
+
+  @override
+  Future setBoneTransform(FilamentEntity entity, String meshName, int boneIndex,
+      Matrix4 data) async {
+    var ptr = calloc<Float>(16);
+    for (int i = 0; i < 16; i++) {
+      ptr.elementAt(i).value = data.storage[i];
+    }
+
+    set_bone_transform(_assetManager!, entity,
+        meshName.toNativeUtf8().cast<Char>(), ptr, boneIndex);
+
+    calloc.free(ptr);
+  }
 }

lib/generated_bindings.dart

@@ -388,6 +388,18 @@ external void set_bone_animation(
   double frameLengthInMs,
 );
 
+@ffi.Native<
+        ffi.Bool Function(ffi.Pointer<ffi.Void>, EntityId,
+            ffi.Pointer<ffi.Char>, ffi.Pointer<ffi.Float>, ffi.Int)>(
+    symbol: 'set_bone_transform', assetId: 'flutter_filament_plugin')
+external bool set_bone_transform(
+  ffi.Pointer<ffi.Void> assetManager,
+  int asset,
+  ffi.Pointer<ffi.Char> entityName,
+  ffi.Pointer<ffi.Float> transform,
+  int boneIndex,
+);
+
 @ffi.Native<
         ffi.Void Function(ffi.Pointer<ffi.Void>, EntityId, ffi.Int, ffi.Bool,
             ffi.Bool, ffi.Bool, ffi.Float)>(

lib/widgets/filament_widget.dart

@@ -139,18 +139,18 @@ class _SizedFilamentWidgetState extends State<_SizedFilamentWidget> {
     );
 
     WidgetsBinding.instance.addPostFrameCallback((timeStamp) async {
-        try {
-        widget.controller.setDimensions(_rect, MediaQuery.of(context).devicePixelRatio);
+      try {
+        widget.controller
+            .setDimensions(_rect, MediaQuery.of(context).devicePixelRatio);
       } catch (err) {
         dev.log("Fatal error : $err");
         _error = err.toString();
       }
-      });
+    });
 
     super.initState();
   }
 
-
   Timer? _resizeTimer;
   bool _resizing = false;
 
@@ -162,26 +162,29 @@ class _SizedFilamentWidgetState extends State<_SizedFilamentWidget> {
     // any subsequent widget resizes will cancel the timer and replace with a new one.
     // debug mode does need a longer timeout.
     _resizeTimer?.cancel();
-    _resizeTimer = Timer(Duration(milliseconds: (kReleaseMode || Platform.isWindows) ? 10 : 100), () async {
+    await widget.controller
+        .setDimensions(_rect, MediaQuery.of(context).devicePixelRatio);
+    _resizeTimer = Timer(
+        Duration(milliseconds: (kReleaseMode || Platform.isWindows) ? 10 : 100),
+        () async {
       try {
-
-        while(_resizing) {
+        while (_resizing) {
           await Future.delayed(const Duration(milliseconds: 20));
         }
         _resizing = true;
-        await widget.controller.setDimensions(_rect, MediaQuery.of(context).devicePixelRatio);
+        await widget.controller
+            .setDimensions(_rect, MediaQuery.of(context).devicePixelRatio);
         await widget.controller.resize();
         _resizeTimer = null;
         setState(() {});
       } catch (err) {
         dev.log("Error resizing FilamentWidget: $err");
-      } finally { 
+      } finally {
         _resizing = false;
         completer.complete();
       }
     });
     return completer.future;
-
   }
 
   @override