refactor: move SOG.DetachToGround() to AttachmentsModule.DetachSceneObjectToGround() and remove redundant code

OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs

@@ -472,7 +472,8 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                 if (changed && m_scene.AvatarFactory != null)
                     m_scene.AvatarFactory.QueueAppearanceSave(remoteClient.AgentId);
 
-                so.DetachToGround();
+                presence.RemoveAttachment(so);
+                DetachSceneObjectToGround(so, presence);
 
                 List<UUID> uuids = new List<UUID>();
                 uuids.Add(inventoryID);
@@ -483,6 +484,33 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
             m_scene.EventManager.TriggerOnAttach(so.LocalId, sceneObjectID, UUID.Zero);
         }
 
+        /// <summary>
+        /// Detach the given scene objet to the ground.
+        /// </summary>
+        /// <remarks>
+        /// The caller has to take care of all the other work in updating avatar appearance, inventory, etc.
+        /// </remarks>
+        /// <param name="so">The scene object to detach.</param>
+        /// <param name="sp">The scene presence from which the scene object is being detached.</param>
+        private void DetachSceneObjectToGround(SceneObjectGroup so, ScenePresence sp)
+        {
+            SceneObjectPart rootPart = so.RootPart;
+
+            rootPart.FromItemID = UUID.Zero;
+            so.AbsolutePosition = sp.AbsolutePosition;
+            so.ForEachPart(part => part.AttachedAvatar = UUID.Zero);
+            rootPart.SetParentLocalId(0);
+            so.ClearPartAttachmentData();
+            rootPart.ApplyPhysics(rootPart.GetEffectiveObjectFlags(), rootPart.VolumeDetectActive, m_scene.m_physicalPrim);
+            so.HasGroupChanged = true;
+            rootPart.Rezzed = DateTime.Now;
+            rootPart.RemFlag(PrimFlags.TemporaryOnRez);
+            so.AttachToBackup();
+            m_scene.EventManager.TriggerParcelPrimCountTainted();
+            rootPart.ScheduleFullUpdate();
+            rootPart.ClearUndoState();
+        }
+        
         // What makes this method odd and unique is it tries to detach using an UUID....     Yay for standards.
         // To LocalId or UUID, *THAT* is the question. How now Brown UUID??
         private void DetachSingleAttachmentToInv(UUID itemID, ScenePresence sp)

OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs

@@ -979,45 +979,18 @@ namespace OpenSim.Region.Framework.Scenes
             return m_rootPart.Shape.State;
         }
 
+        public void SetAttachmentPoint(byte point)
+        {
+            SceneObjectPart[] parts = m_parts.GetArray();
+            for (int i = 0; i < parts.Length; i++)
+                parts[i].SetAttachmentPoint(point);
+        }
+
         public void ClearPartAttachmentData()
         {
             SetAttachmentPoint((Byte)0);
         }
 
-        public void DetachToGround()
-        {
-            ScenePresence avatar = m_scene.GetScenePresence(m_rootPart.AttachedAvatar);
-            if (avatar == null)
-                return;
-
-            avatar.RemoveAttachment(this);
-
-            Vector3 detachedpos = new Vector3(127f,127f,127f);
-            if (avatar == null)
-                return;
-
-            detachedpos = avatar.AbsolutePosition;
-            RootPart.FromItemID = UUID.Zero;
-
-            AbsolutePosition = detachedpos;
-            m_rootPart.AttachedAvatar = UUID.Zero;
-
-            SceneObjectPart[] parts = m_parts.GetArray();
-            for (int i = 0; i < parts.Length; i++)
-                parts[i].AttachedAvatar = UUID.Zero;
-
-            m_rootPart.SetParentLocalId(0);
-            SetAttachmentPoint((byte)0);
-            m_rootPart.ApplyPhysics(m_rootPart.GetEffectiveObjectFlags(), m_rootPart.VolumeDetectActive, m_scene.m_physicalPrim);
-            HasGroupChanged = true;
-            RootPart.Rezzed = DateTime.Now;
-            RootPart.RemFlag(PrimFlags.TemporaryOnRez);
-            AttachToBackup();
-            m_scene.EventManager.TriggerParcelPrimCountTainted();
-            m_rootPart.ScheduleFullUpdate();
-            m_rootPart.ClearUndoState();
-        }
-
         /// <summary>
         ///
         /// </summary>
@@ -3349,13 +3322,6 @@ namespace OpenSim.Region.Framework.Scenes
             return String.Format("{0} {1} ({2})", Name, UUID, AbsolutePosition);
         }
 
-        public void SetAttachmentPoint(byte point)
-        {
-            SceneObjectPart[] parts = m_parts.GetArray();
-            for (int i = 0; i < parts.Length; i++)
-                parts[i].SetAttachmentPoint(point);
-        }
-
         #region ISceneObject
         
         public virtual ISceneObject CloneForNewScene()