Merge branch 'master' into xr-dev

4 files changed, 17 insertions, 8 deletions

diff --git a/io_scene_gltf2/__init__.py b/io_scene_gltf2/__init__.py
index c844838b..dc80a1e1 100755
--- a/io_scene_gltf2/__init__.py
+++ b/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, 22),
+    "version": (3, 2, 26),
     'blender': (3, 1, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',
@@ -378,7 +378,7 @@ class ExportGLTF2_Base:
             "Reduce exported file-size by removing duplicate keyframes"
             "(can cause problems with stepped animation)"
         ),
-        default=True
+        default=False
     )
 
     export_current_frame: BoolProperty(
diff --git a/io_scene_gltf2/blender/exp/gltf2_blender_extract.py b/io_scene_gltf2/blender/exp/gltf2_blender_extract.py
index 98e2ac19..cbb98cc0 100755
--- a/io_scene_gltf2/blender/exp/gltf2_blender_extract.py
+++ b/io_scene_gltf2/blender/exp/gltf2_blender_extract.py
@@ -544,6 +544,7 @@ def __get_colors(blender_mesh, color_i):
 def __get_bone_data(blender_mesh, skin, blender_vertex_groups):
 
     need_neutral_bone = False
+    min_influence = 0.0001
 
     joint_name_to_index = {joint.name: index for index, joint in enumerate(skin.joints)}
     group_to_joint = [joint_name_to_index.get(g.name) for g in blender_vertex_groups]
@@ -557,7 +558,7 @@ def __get_bone_data(blender_mesh, skin, blender_vertex_groups):
         if vertex.groups:
             for group_element in vertex.groups:
                 weight = group_element.weight
-                if weight <= 0.0:
+                if weight <= min_influence:
                     continue
                 try:
                     joint = group_to_joint[group_element.group]
diff --git a/io_scene_gltf2/blender/exp/gltf2_blender_gather_tree.py b/io_scene_gltf2/blender/exp/gltf2_blender_gather_tree.py
index cf4983e1..e629a963 100644
--- a/io_scene_gltf2/blender/exp/gltf2_blender_gather_tree.py
+++ b/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 ?
diff --git a/io_scene_gltf2/blender/imp/gltf2_blender_scene.py b/io_scene_gltf2/blender/imp/gltf2_blender_scene.py
index 2092a6be..672b68c8 100755
--- a/io_scene_gltf2/blender/imp/gltf2_blender_scene.py
+++ b/io_scene_gltf2/blender/imp/gltf2_blender_scene.py
@@ -36,12 +36,18 @@ class BlenderScene():
         BlenderNode.create_vnode(gltf, 'root')
 
         # User extensions before scene creation
-        import_user_extensions('gather_import_scene_after_nodes_hook', gltf, gltf.data.scenes[gltf.data.scene], scene)
+        gltf_scene = None
+        if gltf.data.scene is not None:
+            gltf_scene = gltf.data.scenes[gltf.data.scene]
+        import_user_extensions('gather_import_scene_after_nodes_hook', gltf, gltf_scene, scene)
 
-        # User extensions after scene creation
         BlenderScene.create_animations(gltf)
 
-        import_user_extensions('gather_import_scene_after_animation_hook', gltf, gltf.data.scenes[gltf.data.scene], scene)
+        # User extensions after scene creation
+        gltf_scene = None
+        if gltf.data.scene is not None:
+            gltf_scene = gltf.data.scenes[gltf.data.scene]
+        import_user_extensions('gather_import_scene_after_animation_hook', gltf, gltf_scene, scene)
 
         if bpy.context.mode != 'OBJECT':
             bpy.ops.object.mode_set(mode='OBJECT')