Speedup rigid body "Copy from Active" operator

If there were lots of selected objects without an existing rigid body,
we would add rigid bodies to them one by one.

This would be slow in python, now we instead do this as a batch
operation in C.

On my (Intel) MacBook it used to take 60 seconds and with this change it
takes about 0.3 seconds.

Reviewed By: Sebastian Parborg

Differential Revision: http://developer.blender.org/D11957

release/scripts/startup/bl_operators/rigidbody.py

@@ -60,17 +60,22 @@ class CopyRigidbodySettings(Operator):
 
     def execute(self, context):
         obj_act = context.object
-        view_layer = context.view_layer
 
-        # deselect all but mesh objects
+        # Deselect all non mesh objects and objects that
+        # already have a rigid body attached.
+        rb_objects = []
         for o in context.selected_objects:
-            if o.type != 'MESH':
+            if o.type != 'MESH' or o.rigid_body is not None:
                 o.select_set(False)
-            elif o.rigid_body is None:
-                # Add rigidbody to object!
-                view_layer.objects.active = o
-                bpy.ops.rigidbody.object_add()
-        view_layer.objects.active = obj_act
+                if o.rigid_body is not None:
+                    rb_objects.append(o)
+
+        bpy.ops.rigidbody.objects_add()
+
+        # Ensure that the rigid body objects
+        # we've de-selected are selected again.
+        for o in rb_objects:
+            o.select_set(True)
 
         objects = context.selected_objects
         if objects: