Merge pull request #4234 from pypeclub/feature/blender-workfile_loader

Blender: Workfile Loader

openpype/hosts/blender/plugins/load/import_workfile.py

@@ -0,0 +1,82 @@
+import bpy
+
+from openpype.hosts.blender.api import plugin
+
+
+def append_workfile(context, fname, do_import):
+    asset = context['asset']['name']
+    subset = context['subset']['name']
+
+    group_name = plugin.asset_name(asset, subset)
+
+    # We need to preserve the original names of the scenes, otherwise,
+    # if there are duplicate names in the current workfile, the imported
+    # scenes will be renamed by Blender to avoid conflicts.
+    original_scene_names = []
+
+    with bpy.data.libraries.load(fname) as (data_from, data_to):
+        for attr in dir(data_to):
+            if attr == "scenes":
+                for scene in data_from.scenes:
+                    original_scene_names.append(scene)
+            setattr(data_to, attr, getattr(data_from, attr))
+
+    current_scene = bpy.context.scene
+
+    for scene, s_name in zip(data_to.scenes, original_scene_names):
+        scene.name = f"{group_name}_{s_name}"
+        if do_import:
+            collection = bpy.data.collections.new(f"{group_name}_{s_name}")
+            for obj in scene.objects:
+                collection.objects.link(obj)
+            current_scene.collection.children.link(collection)
+            for coll in scene.collection.children:
+                collection.children.link(coll)
+
+
+class AppendBlendLoader(plugin.AssetLoader):
+    """Append workfile in Blender (unmanaged)
+
+    Warning:
+        The loaded content will be unmanaged and is *not* visible in the
+        scene inventory. It's purely intended to merge content into your scene
+        so you could also use it as a new base.
+    """
+
+    representations = ["blend"]
+    families = ["*"]
+
+    label = "Append Workfile"
+    order = 9
+    icon = "arrow-circle-down"
+    color = "#775555"
+
+    def load(self, context, name=None, namespace=None, data=None):
+        append_workfile(context, self.fname, False)
+
+        # We do not containerize imported content, it remains unmanaged
+        return
+
+
+class ImportBlendLoader(plugin.AssetLoader):
+    """Import workfile in the current Blender scene (unmanaged)
+
+    Warning:
+        The loaded content will be unmanaged and is *not* visible in the
+        scene inventory. It's purely intended to merge content into your scene
+        so you could also use it as a new base.
+    """
+
+    representations = ["blend"]
+    families = ["*"]
+
+    label = "Import Workfile"
+    order = 9
+    icon = "arrow-circle-down"
+    color = "#775555"
+
+    def load(self, context, name=None, namespace=None, data=None):
+        append_workfile(context, self.fname, True)
+
+        # We do not containerize imported content, it remains unmanaged
+        return