feat: start to support metaballs

bl_types/__init__.py

@@ -13,7 +13,8 @@ __all__ = [
     'bl_library',
     'bl_armature',
     'bl_action',
-    'bl_world'
+    'bl_world',
+    'bl_metaball'
 ]  # Order here defines execution order
 
 from . import *

bl_types/bl_light.py

@@ -15,8 +15,9 @@ class BlLight(BlDatablock):
 
     def dump(self, pointer=None):
         assert(pointer)
-
-        replicated_attributes = [
+        dumper = utils.dump_anything.Dumper()
+        dumper.depth = 3
+        dumper.include_filter = [
             "name",
             "type",
             "color",
@@ -36,7 +37,7 @@ class BlLight(BlDatablock):
             "contact_shadow_bias",
             "contact_shadow_thickness"
         ]
-        data = { k:v for k,v in utils.dump_datablock(pointer, 3).items() if k in replicated_attributes }
+        data = dumper.dump(pointer)
         return data
 
     def resolve(self):

bl_types/bl_metaball.py

@@ -0,0 +1,45 @@
+import bpy
+import mathutils
+from jsondiff import diff
+
+from .. import utils
+from .bl_datablock import BlDatablock
+
+
+class BlMetaball(BlDatablock):
+    def construct(self, data):
+        return bpy.data.metaballs.new(data["name"])
+
+    def load(self, data, target):
+        utils.dump_anything.load(target, data)
+        
+        target.elements.clear()
+        for element in data["elements"]:
+            element = target.elements.new(type=data["elements"][element]['type'])
+            utils.dump_anything.load(element,  data["elements"][element])
+    def dump(self, pointer=None):
+        assert(pointer)
+        dumper = utils.dump_anything.Dumper()
+        dumper.depth = 3
+
+        data = dumper.dump(pointer)
+        return data
+
+    def resolve(self):
+        assert(self.buffer)
+        self.pointer = bpy.data.metaballs.get(self.buffer['name'])
+
+    def diff(self):
+        return (self.bl_diff() or
+                len(diff(self.dump(pointer=self.pointer), self.buffer)) > 1)
+
+    def is_valid(self):
+        return bpy.data.metaballs.get(self.buffer['name'])
+
+bl_id = "metaballs"
+bl_class = bpy.types.MetaBall
+bl_rep_class = BlMetaball
+bl_delay_refresh = 1
+bl_delay_apply = 1
+bl_automatic_push = True
+bl_icon = 'META_BALL'

bl_types/bl_object.py

@@ -27,6 +27,8 @@ class BlObject(BlDatablock):
             pointer = bpy.data.cameras[data["data"]]
         elif data["data"] in bpy.data.curves.keys():
             pointer = bpy.data.curves[data["data"]]
+        elif data["data"] in bpy.data.metaballs.keys():
+            pointer = bpy.data.metaballs[data["data"]]
         elif data["data"] in bpy.data.armatures.keys():
             pointer = bpy.data.armatures[data["data"]]
         elif data["data"] in bpy.data.grease_pencils.keys():