glTF exporter: fix active scene export + option to use only active scene

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, 26),
+    "version": (3, 2, 27),
     'blender': (3, 1, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',
@@ -311,6 +311,12 @@ class ExportGLTF2_Base:
         default=False
     )
 
+    use_active_scene: BoolProperty(
+        name='Active Scene',
+        description='Export active scene only',
+        default=False
+    )
+
     export_extras: BoolProperty(
         name='Custom Properties',
         description='Export custom properties as glTF extras',
@@ -485,6 +491,7 @@ class ExportGLTF2_Base:
             'use_active_collection',
             'use_mesh_edges',
             'use_mesh_vertices',
+            'use_active_scene',
         ]
         all_props = self.properties
         export_props = {
@@ -544,6 +551,7 @@ class ExportGLTF2_Base:
         export_settings['gltf_visible'] = self.use_visible
         export_settings['gltf_renderable'] = self.use_renderable
         export_settings['gltf_active_collection'] = self.use_active_collection
+        export_settings['gltf_active_scene'] = self.use_active_scene
 
         export_settings['gltf_selected'] = self.use_selection
         export_settings['gltf_layers'] = True  # self.export_layers
@@ -682,6 +690,7 @@ class GLTF_PT_export_include(bpy.types.Panel):
         col.prop(operator, 'use_visible')
         col.prop(operator, 'use_renderable')
         col.prop(operator, 'use_active_collection')
+        col.prop(operator, 'use_active_scene')
 
         col = layout.column(heading = "Data", align = True)
         col.prop(operator, 'export_extras')

io_scene_gltf2/blender/exp/gltf2_blender_gather.py

@@ -25,13 +25,14 @@ def gather_gltf2(export_settings):
     animations = []  # unfortunately animations in gltf2 are just as 'root' as scenes.
     active_scene = None
     store_user_scene = bpy.context.scene
-    for blender_scene in bpy.data.scenes:
+    scenes_to_export = bpy.data.scenes if export_settings['gltf_active_scene'] is False else [scene for scene in bpy.data.scenes if scene.name == store_user_scene.name]
+    for blender_scene in scenes_to_export:
         scenes.append(__gather_scene(blender_scene, export_settings))
         if export_settings[gltf2_blender_export_keys.ANIMATIONS]:
             # resetting object cache
             gltf2_blender_gather_animation_sampler_keyframes.get_object_matrix.reset_cache()
             animations += __gather_animations(blender_scene, export_settings)
-        if bpy.context.scene.name == blender_scene.name:
+        if bpy.context.scene.name == store_user_scene.name:
             active_scene = len(scenes) -1
 
     # restore user scene