[Bf-extensions-cvs] [c7aa80f4] master: glTF exporter: add some NLA checks (readonly action / track)

[Julien Duroure]

Commit: c7aa80f40ae438618498bc678409a4260f4356ab
Author: Julien Duroure
Date:   Sat Jun 1 19:56:28 2019 +0200
Branches: master
https://developer.blender.org/rBAc7aa80f40ae438618498bc678409a4260f4356ab

glTF exporter: add some NLA checks (readonly action / track)

===================================================================

M	io_scene_gltf2/__init__.py
M	io_scene_gltf2/blender/exp/gltf2_blender_gather_animations.py

===================================================================

diff --git a/io_scene_gltf2/__init__.py b/io_scene_gltf2/__init__.py
index 0612b547..2e2b6ae2 100755
--- a/io_scene_gltf2/__init__.py
+++ b/io_scene_gltf2/__init__.py
@@ -15,7 +15,7 @@
 bl_info = {
     'name': 'glTF 2.0 format',
     'author': 'Julien Duroure, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
-    "version": (0, 9, 17),
+    "version": (0, 9, 18),
     'blender': (2, 80, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',
diff --git a/io_scene_gltf2/blender/exp/gltf2_blender_gather_animations.py b/io_scene_gltf2/blender/exp/gltf2_blender_gather_animations.py
index 6473f5de..7a4f1213 100755
--- a/io_scene_gltf2/blender/exp/gltf2_blender_gather_animations.py
+++ b/io_scene_gltf2/blender/exp/gltf2_blender_gather_animations.py
@@ -44,7 +44,19 @@ def gather_animations(blender_object: bpy.types.Object, export_settings) -> typi
 
         # Set action as active, to be able to bake if needed
         if blender_object.animation_data: # Not for shapekeys!
-            blender_object.animation_data.action = blender_action
+            if blender_object.animation_data.action is None \
+                    or (blender_object.animation_data.action.name != blender_action.name):
+                if blender_object.animation_data.is_property_readonly('action'):
+                    # NLA stuff: some track are on readonly mode, we can't change action
+                    error = "Action is readonly. Please check NLA editor"
+                    print_console("WARNING", "Animation '{}' could not be exported. Cause: {}".format(blender_action.name, error))
+                    continue
+                try:
+                    blender_object.animation_data.action = blender_action
+                except:
+                    error = "Action is readonly. Please check NLA editor"
+                    print_console("WARNING", "Animation '{}' could not be exported. Cause: {}".format(blender_action.name, error))
+                    continue
 
         animation = __gather_animation(blender_action, blender_object, export_settings)
         if animation is not None:
@@ -52,7 +64,8 @@ def gather_animations(blender_object: bpy.types.Object, export_settings) -> typi
 
     # Restore current action
     if blender_object.animation_data:
-        blender_object.animation_data.action = current_action
+        if blender_object.animation_data.action is not None and current_action is not None and blender_object.animation_data.action.name != current_action.name:
+            blender_object.animation_data.action = current_action
 
     return animations