Merge pull request #4128 from pypeclub/feature/blender-extract_alembi…

…c_animation

Blender: Extract Alembic Animations

openpype/hosts/blender/plugins/publish/extract_abc_animation.py

@@ -0,0 +1,72 @@
+import os
+
+import bpy
+
+from openpype.pipeline import publish
+from openpype.hosts.blender.api import plugin
+
+
+class ExtractAnimationABC(publish.Extractor):
+    """Extract as ABC."""
+
+    label = "Extract Animation ABC"
+    hosts = ["blender"]
+    families = ["animation"]
+    optional = True
+
+    def process(self, instance):
+        # Define extract output file path
+        stagingdir = self.staging_dir(instance)
+        filename = f"{instance.name}.abc"
+        filepath = os.path.join(stagingdir, filename)
+
+        context = bpy.context
+
+        # Perform extraction
+        self.log.info("Performing extraction..")
+
+        plugin.deselect_all()
+
+        selected = []
+        asset_group = None
+
+        objects = []
+        for obj in instance:
+            if isinstance(obj, bpy.types.Collection):
+                for child in obj.all_objects:
+                    objects.append(child)
+        for obj in objects:
+            children = [o for o in bpy.data.objects if o.parent == obj]
+            for child in children:
+                objects.append(child)
+
+        for obj in objects:
+            obj.select_set(True)
+            selected.append(obj)
+
+        context = plugin.create_blender_context(
+            active=asset_group, selected=selected)
+
+        # We export the abc
+        bpy.ops.wm.alembic_export(
+            context,
+            filepath=filepath,
+            selected=True,
+            flatten=False
+        )
+
+        plugin.deselect_all()
+
+        if "representations" not in instance.data:
+            instance.data["representations"] = []
+
+        representation = {
+            'name': 'abc',
+            'ext': 'abc',
+            'files': filename,
+            "stagingDir": stagingdir,
+        }
+        instance.data["representations"].append(representation)
+
+        self.log.info("Extracted instance '%s' to: %s",
+                      instance.name, representation)