glTF exporter: Set blender active scene as main scene in glTF file

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, 52),
+    "version": (0, 9, 53),
     'blender': (2, 80, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',

io_scene_gltf2/blender/exp/gltf2_blender_export.py

@@ -66,14 +66,14 @@ def __get_copyright(export_settings):
 
 
 def __gather_gltf(exporter, export_settings):
-    scenes, animations = gltf2_blender_gather.gather_gltf2(export_settings)
+    active_scene_idx, scenes, animations = gltf2_blender_gather.gather_gltf2(export_settings)
 
     if export_settings['gltf_draco_mesh_compression']:
         gltf2_io_draco_compression_extension.compress_scene_primitives(scenes, export_settings)
         exporter.add_draco_extension()
 
-    for scene in scenes:
-        exporter.add_scene(scene)
+    for idx, scene in enumerate(scenes):
+        exporter.add_scene(scene, idx==active_scene_idx)
     for animation in animations:
         exporter.add_animation(animation)
 

io_scene_gltf2/blender/exp/gltf2_blender_gather.py

@@ -30,12 +30,14 @@ def gather_gltf2(export_settings):
     """
     scenes = []
     animations = []  # unfortunately animations in gltf2 are just as 'root' as scenes.
+    active_scene = None
     for blender_scene in bpy.data.scenes:
         scenes.append(__gather_scene(blender_scene, export_settings))
         if export_settings[gltf2_blender_export_keys.ANIMATIONS]:
             animations += __gather_animations(blender_scene, export_settings)
-
-    return scenes, animations
+        if bpy.context.scene.name == blender_scene.name:
+            active_scene = len(scenes) -1
+    return active_scene, scenes, animations
 
 
 @cached

io_scene_gltf2/blender/exp/gltf2_blender_gltf2_exporter.py

@@ -156,7 +156,7 @@ class GlTF2Exporter:
             with open(dst_path, 'wb') as f:
                 f.write(image.data)
 
-    def add_scene(self, scene: gltf2_io.Scene, active: bool = True):
+    def add_scene(self, scene: gltf2_io.Scene, active: bool = False):
         """
         Add a scene to the glTF.