glTF export: fix bone export when Yup is off

io_scene_gltf2/__init__.py

@@ -4,7 +4,7 @@
 bl_info = {
     'name': 'glTF 2.0 format',
     'author': 'Julien Duroure, Scurest, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
-    "version": (3, 2, 23),
+    "version": (3, 2, 24),
     'blender': (3, 1, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',

io_scene_gltf2/blender/exp/gltf2_blender_gather_tree.py

@@ -170,8 +170,10 @@ class VExportTree:
                 node.matrix_world @= correction.to_matrix().to_4x4()
         elif node.blender_type == VExportNode.BONE:
             node.matrix_world = self.nodes[node.armature].matrix_world @ blender_bone.matrix
-            axis_basis_change = Matrix(
-                ((1.0, 0.0, 0.0, 0.0), (0.0, 0.0, 1.0, 0.0), (0.0, -1.0, 0.0, 0.0), (0.0, 0.0, 0.0, 1.0)))
+            axis_basis_change = Matrix.Identity(4)
+            if self.export_settings[gltf2_blender_export_keys.YUP]:
+                axis_basis_change = Matrix(
+                    ((1.0, 0.0, 0.0, 0.0), (0.0, 0.0, 1.0, 0.0), (0.0, -1.0, 0.0, 0.0), (0.0, 0.0, 0.0, 1.0)))
             node.matrix_world = node.matrix_world @ axis_basis_change
 
         # Force empty ?