1 files changed, 531 insertions, 135 deletions

diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index 5f00f84..c870797 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -29,6 +29,7 @@ using System;
 using System.Collections.Generic;
 using System.Drawing;
 using System.IO;
+using System.Diagnostics;
 using System.Linq;
 using System.Threading;
 using System.Xml;
@@ -105,8 +106,29 @@ namespace OpenSim.Region.Framework.Scenes
         /// since the group's last persistent backup
         /// </summary>
         private bool m_hasGroupChanged = false;
-        private long timeFirstChanged;
-        private long timeLastChanged;
+        private long timeFirstChanged = 0;
+        private long timeLastChanged = 0;
+        private long m_maxPersistTime = 0;
+        private long m_minPersistTime = 0;
+        private Random m_rand;
+        private bool m_suspendUpdates;
+        private List<ScenePresence> m_linkedAvatars = new List<ScenePresence>();
+
+        public bool areUpdatesSuspended
+        {
+            get
+            {
+                return m_suspendUpdates;
+            }
+            set 
+            {
+                m_suspendUpdates = value;   
+                if (!value)
+                {
+                    QueueForUpdateCheck();
+                }               
+            }
+        }
 
         public bool HasGroupChanged
         {
@@ -114,9 +136,39 @@ namespace OpenSim.Region.Framework.Scenes
             {
                 if (value)
                 {
+                    if (m_isBackedUp)
+                    {
+                        m_scene.SceneGraph.FireChangeBackup(this);
+                    }
                     timeLastChanged = DateTime.Now.Ticks;
                     if (!m_hasGroupChanged)
                         timeFirstChanged = DateTime.Now.Ticks;
+                    if (m_rootPart != null && m_rootPart.UUID != null && m_scene != null)
+                    {
+                        if (m_rand == null)
+                        {
+                            byte[] val = new byte[16];
+                            m_rootPart.UUID.ToBytes(val, 0);
+                            m_rand = new Random(BitConverter.ToInt32(val, 0));
+                        }
+                       
+                        if (m_scene.GetRootAgentCount() == 0)
+                        {
+                            //If the region is empty, this change has been made by an automated process
+                            //and thus we delay the persist time by a random amount between 1.5 and 2.5.
+
+                            float factor = 1.5f + (float)(m_rand.NextDouble());
+                            m_maxPersistTime = (long)((float)m_scene.m_persistAfter * factor);
+                            m_minPersistTime = (long)((float)m_scene.m_dontPersistBefore * factor);
+                        }
+                        else
+                        {
+                            //If the region is not empty, we want to obey the minimum and maximum persist times
+                            //but add a random factor so we stagger the object persistance a little
+                            m_maxPersistTime = (long)((float)m_scene.m_persistAfter * (1.0d - (m_rand.NextDouble() / 5.0d))); //Multiply by 1.0-1.5
+                            m_minPersistTime = (long)((float)m_scene.m_dontPersistBefore * (1.0d + (m_rand.NextDouble() / 2.0d))); //Multiply by 0.8-1.0
+                        }
+                    }
                 }
                 m_hasGroupChanged = value;
             }
@@ -132,8 +184,19 @@ namespace OpenSim.Region.Framework.Scenes
                 return false;
             if (m_scene.ShuttingDown)
                 return true;
+
+            if (m_minPersistTime == 0 || m_maxPersistTime == 0)
+            {
+                m_maxPersistTime = m_scene.m_persistAfter;
+                m_minPersistTime = m_scene.m_dontPersistBefore;
+            }
+                
             long currentTime = DateTime.Now.Ticks;
-            if (currentTime - timeLastChanged > m_scene.m_dontPersistBefore || currentTime - timeFirstChanged > m_scene.m_persistAfter)
+
+            if (timeLastChanged == 0) timeLastChanged = currentTime;
+            if (timeFirstChanged == 0) timeFirstChanged = currentTime;
+
+            if (currentTime - timeLastChanged > m_minPersistTime || currentTime - timeFirstChanged > m_maxPersistTime)
                 return true;
             return false;
         }
@@ -176,10 +239,10 @@ namespace OpenSim.Region.Framework.Scenes
 
         private bool m_scriptListens_atTarget;
         private bool m_scriptListens_notAtTarget;
-
         private bool m_scriptListens_atRotTarget;
         private bool m_scriptListens_notAtRotTarget;
 
+        public bool m_dupeInProgress = false;
         internal Dictionary<UUID, string> m_savedScriptState;
 
         #region Properties
@@ -219,7 +282,13 @@ namespace OpenSim.Region.Framework.Scenes
         public virtual Quaternion Rotation
         {
             get { return m_rotation; }
-            set { m_rotation = value; }
+            set {
+                foreach(SceneObjectPart p in m_parts.GetArray())
+                {
+                    p.StoreUndoState(UndoType.STATE_GROUP_ROTATION);
+                }
+                m_rotation = value; 
+            }
         }
 
         public Quaternion GroupRotation
@@ -293,7 +362,11 @@ namespace OpenSim.Region.Framework.Scenes
                 {
                     m_scene.CrossPrimGroupIntoNewRegion(val, this, true);
                 }
-                
+
+                foreach (SceneObjectPart part in m_parts.GetArray())
+                {
+                    part.IgnoreUndoUpdate = true;
+                }
                 if (RootPart.GetStatusSandbox())
                 {
                     if (Util.GetDistanceTo(RootPart.StatusSandboxPos, value) > 10)
@@ -304,10 +377,31 @@ namespace OpenSim.Region.Framework.Scenes
                         return;
                     }
                 }
-
                 SceneObjectPart[] parts = m_parts.GetArray();
-                for (int i = 0; i < parts.Length; i++)
-                    parts[i].GroupPosition = val;
+                foreach (SceneObjectPart part in parts)
+                {
+                    part.IgnoreUndoUpdate = false;
+                    part.StoreUndoState(UndoType.STATE_GROUP_POSITION);
+                    part.GroupPosition = val;
+                    if (!m_dupeInProgress)
+                    {
+                        part.TriggerScriptChangedEvent(Changed.POSITION);
+                    }
+                }
+                if (!m_dupeInProgress)
+                {
+                    foreach (ScenePresence av in m_linkedAvatars)
+                    {
+                        SceneObjectPart p;
+                        if (m_parts.TryGetValue(av.LinkedPrim, out p))
+                        {
+                            Vector3 offset = p.GetWorldPosition() - av.ParentPosition;
+                            av.AbsolutePosition += offset;
+                            av.ParentPosition = p.GetWorldPosition(); //ParentPosition gets cleared by AbsolutePosition
+                            av.SendFullUpdateToAllClients();
+                        }
+                    }
+                }
 
                 //if (m_rootPart.PhysActor != null)
                 //{
@@ -458,6 +552,7 @@ namespace OpenSim.Region.Framework.Scenes
         /// </summary>
         public SceneObjectGroup()
         {
+            
         }
 
         /// <summary>
@@ -474,7 +569,7 @@ namespace OpenSim.Region.Framework.Scenes
         /// Constructor.  This object is added to the scene later via AttachToScene()
         /// </summary>
         public SceneObjectGroup(UUID ownerID, Vector3 pos, Quaternion rot, PrimitiveBaseShape shape)
-        { 
+        {
             SetRootPart(new SceneObjectPart(ownerID, shape, pos, rot, Vector3.Zero));
         }
 
@@ -520,6 +615,9 @@ namespace OpenSim.Region.Framework.Scenes
         /// </summary>
         public virtual void AttachToBackup()
         {
+            if (IsAttachment) return;
+            m_scene.SceneGraph.FireAttachToBackup(this);
+
             if (InSceneBackup)
             {
                 //m_log.DebugFormat(
@@ -635,9 +733,9 @@ namespace OpenSim.Region.Framework.Scenes
                         result.normal = inter.normal;
                         result.distance = inter.distance;
                     }
+                    
                 }
             }
-
             return result;
         }
 
@@ -657,17 +755,19 @@ namespace OpenSim.Region.Framework.Scenes
             minZ = 8192f;
 
             SceneObjectPart[] parts = m_parts.GetArray();
-            for (int i = 0; i < parts.Length; i++)
+            foreach (SceneObjectPart part in parts)
             {
-                SceneObjectPart part = parts[i];
-
                 Vector3 worldPos = part.GetWorldPosition();
                 Vector3 offset = worldPos - AbsolutePosition;
                 Quaternion worldRot;
                 if (part.ParentID == 0)
+                {
                     worldRot = part.RotationOffset;
+                }
                 else
+                {
                     worldRot = part.GetWorldRotation();
+                }
 
                 Vector3 frontTopLeft;
                 Vector3 frontTopRight;
@@ -679,6 +779,8 @@ namespace OpenSim.Region.Framework.Scenes
                 Vector3 backBottomLeft;
                 Vector3 backBottomRight;
 
+               // Vector3[] corners = new Vector3[8];
+
                 Vector3 orig = Vector3.Zero;
 
                 frontTopLeft.X = orig.X - (part.Scale.X / 2);
@@ -713,6 +815,38 @@ namespace OpenSim.Region.Framework.Scenes
                 backBottomRight.Y = orig.Y + (part.Scale.Y / 2);
                 backBottomRight.Z = orig.Z - (part.Scale.Z / 2);
 
+                
+
+                //m_log.InfoFormat("pre corner 1 is {0} {1} {2}", frontTopLeft.X, frontTopLeft.Y, frontTopLeft.Z);
+                //m_log.InfoFormat("pre corner 2 is {0} {1} {2}", frontTopRight.X, frontTopRight.Y, frontTopRight.Z);
+                //m_log.InfoFormat("pre corner 3 is {0} {1} {2}", frontBottomRight.X, frontBottomRight.Y, frontBottomRight.Z);
+                //m_log.InfoFormat("pre corner 4 is {0} {1} {2}", frontBottomLeft.X, frontBottomLeft.Y, frontBottomLeft.Z);
+                //m_log.InfoFormat("pre corner 5 is {0} {1} {2}", backTopLeft.X, backTopLeft.Y, backTopLeft.Z);
+                //m_log.InfoFormat("pre corner 6 is {0} {1} {2}", backTopRight.X, backTopRight.Y, backTopRight.Z);
+                //m_log.InfoFormat("pre corner 7 is {0} {1} {2}", backBottomRight.X, backBottomRight.Y, backBottomRight.Z);
+                //m_log.InfoFormat("pre corner 8 is {0} {1} {2}", backBottomLeft.X, backBottomLeft.Y, backBottomLeft.Z);
+
+                //for (int i = 0; i < 8; i++)
+                //{
+                //    corners[i] = corners[i] * worldRot;
+                //    corners[i] += offset;
+
+                //    if (corners[i].X > maxX)
+                //        maxX = corners[i].X;
+                //    if (corners[i].X < minX)
+                //        minX = corners[i].X;
+
+                //    if (corners[i].Y > maxY)
+                //        maxY = corners[i].Y;
+                //    if (corners[i].Y < minY)
+                //        minY = corners[i].Y;
+
+                //    if (corners[i].Z > maxZ)
+                //        maxZ = corners[i].Y;
+                //    if (corners[i].Z < minZ)
+                //        minZ = corners[i].Z;
+                //}
+
                 frontTopLeft = frontTopLeft * worldRot;
                 frontTopRight = frontTopRight * worldRot;
                 frontBottomLeft = frontBottomLeft * worldRot;
@@ -734,6 +868,15 @@ namespace OpenSim.Region.Framework.Scenes
                 backTopLeft += offset;
                 backTopRight += offset;
 
+                //m_log.InfoFormat("corner 1 is {0} {1} {2}", frontTopLeft.X, frontTopLeft.Y, frontTopLeft.Z);
+                //m_log.InfoFormat("corner 2 is {0} {1} {2}", frontTopRight.X, frontTopRight.Y, frontTopRight.Z);
+                //m_log.InfoFormat("corner 3 is {0} {1} {2}", frontBottomRight.X, frontBottomRight.Y, frontBottomRight.Z);
+                //m_log.InfoFormat("corner 4 is {0} {1} {2}", frontBottomLeft.X, frontBottomLeft.Y, frontBottomLeft.Z);
+                //m_log.InfoFormat("corner 5 is {0} {1} {2}", backTopLeft.X, backTopLeft.Y, backTopLeft.Z);
+                //m_log.InfoFormat("corner 6 is {0} {1} {2}", backTopRight.X, backTopRight.Y, backTopRight.Z);
+                //m_log.InfoFormat("corner 7 is {0} {1} {2}", backBottomRight.X, backBottomRight.Y, backBottomRight.Z);
+                //m_log.InfoFormat("corner 8 is {0} {1} {2}", backBottomLeft.X, backBottomLeft.Y, backBottomLeft.Z);
+
                 if (frontTopRight.X > maxX)
                     maxX = frontTopRight.X;
                 if (frontTopLeft.X > maxX)
@@ -879,15 +1022,20 @@ namespace OpenSim.Region.Framework.Scenes
 
         public void SaveScriptedState(XmlTextWriter writer)
         {
+            SaveScriptedState(writer, false);
+        }
+
+        public void SaveScriptedState(XmlTextWriter writer, bool oldIDs)
+        {
             XmlDocument doc = new XmlDocument();
             Dictionary<UUID,string> states = new Dictionary<UUID,string>();
 
             SceneObjectPart[] parts = m_parts.GetArray();
             for (int i = 0; i < parts.Length; i++)
             {
-                Dictionary<UUID, string> pstates = parts[i].Inventory.GetScriptStates();
+                Dictionary<UUID, string> pstates = parts[i].Inventory.GetScriptStates(oldIDs);
                 foreach (KeyValuePair<UUID, string> kvp in pstates)
-                    states.Add(kvp.Key, kvp.Value);
+                    states[kvp.Key] = kvp.Value;
             }
 
             if (states.Count > 0)
@@ -906,6 +1054,118 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
 
+        /// <summary>
+        /// Add the avatar to this linkset (avatar is sat).
+        /// </summary>
+        /// <param name="agentID"></param>
+        public void AddAvatar(UUID agentID)
+        {
+            ScenePresence presence;
+            if (m_scene.TryGetScenePresence(agentID, out presence))
+            {
+                if (!m_linkedAvatars.Contains(presence))
+                {
+                    m_linkedAvatars.Add(presence);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Delete the avatar from this linkset (avatar is unsat).
+        /// </summary>
+        /// <param name="agentID"></param>
+        public void DeleteAvatar(UUID agentID)
+        {
+            ScenePresence presence;
+            if (m_scene.TryGetScenePresence(agentID, out presence))
+            {
+                if (m_linkedAvatars.Contains(presence))
+                {
+                    m_linkedAvatars.Remove(presence);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Returns the list of linked presences (avatars sat on this group)
+        /// </summary>
+        /// <param name="agentID"></param>
+        public List<ScenePresence> GetLinkedAvatars()
+        {
+            return m_linkedAvatars;
+        }
+
+        /// <summary>
+        /// Attach this scene object to the given avatar.
+        /// </summary>
+        /// <param name="agentID"></param>
+        /// <param name="attachmentpoint"></param>
+        /// <param name="AttachOffset"></param>
+        public void AttachToAgent(UUID agentID, uint attachmentpoint, Vector3 AttachOffset, bool silent)
+        {
+            ScenePresence avatar = m_scene.GetScenePresence(agentID);
+            if (avatar != null)
+            {
+                // don't attach attachments to child agents
+                if (avatar.IsChildAgent) return;
+
+//                m_log.DebugFormat("[SOG]: Adding attachment {0} to avatar {1}", Name, avatar.Name);
+                                  
+                DetachFromBackup();
+
+                // Remove from database and parcel prim count
+                m_scene.DeleteFromStorage(UUID);
+                m_scene.EventManager.TriggerParcelPrimCountTainted();
+
+                m_rootPart.AttachedAvatar = agentID;
+
+                //Anakin Lohner bug #3839 
+                lock (m_parts)
+                {
+                    foreach (SceneObjectPart p in m_parts.GetArray())
+                    {
+                        p.AttachedAvatar = agentID;
+                    }
+                }
+
+                if (m_rootPart.PhysActor != null)
+                {
+                    m_scene.PhysicsScene.RemovePrim(m_rootPart.PhysActor);
+                    m_rootPart.PhysActor = null;
+                }
+
+                AbsolutePosition = AttachOffset;
+                m_rootPart.AttachedPos = AttachOffset;
+                m_rootPart.IsAttachment = true;
+
+                m_rootPart.SetParentLocalId(avatar.LocalId);
+                SetAttachmentPoint(Convert.ToByte(attachmentpoint));
+
+                avatar.AddAttachment(this);
+
+                if (!silent)
+                {
+                    // Killing it here will cause the client to deselect it
+                    // It then reappears on the avatar, deselected
+                    // through the full update below
+                    //
+                    if (IsSelected)
+                    {
+                        m_scene.SendKillObject(new List<uint> { m_rootPart.LocalId });
+                    }
+
+                    IsSelected = false; // fudge....
+                    ScheduleGroupForFullUpdate();
+                }
+            }
+            else
+            {
+                m_log.WarnFormat(
+                    "[SOG]: Tried to add attachment {0} to avatar with UUID {1} in region {2} but the avatar is not present", 
+                    UUID, agentID, Scene.RegionInfo.RegionName);
+            }
+        }
+
         public byte GetAttachmentPoint()
         {
             return m_rootPart.Shape.State;
@@ -1032,7 +1292,10 @@ namespace OpenSim.Region.Framework.Scenes
         public void AddPart(SceneObjectPart part)
         {
             part.SetParent(this);
-            part.LinkNum = m_parts.Add(part.UUID, part);
+            m_parts.Add(part.UUID, part);
+
+            part.LinkNum = m_parts.Count;
+
             if (part.LinkNum == 2 && RootPart != null)
                 RootPart.LinkNum = 1;
         }
@@ -1116,7 +1379,7 @@ namespace OpenSim.Region.Framework.Scenes
 
         public virtual void OnGrabPart(SceneObjectPart part, Vector3 offsetPos, IClientAPI remoteClient)
         {
-            part.StoreUndoState();
+            part.StoreUndoState(UndoType.STATE_PRIM_ALL);
             part.OnGrab(offsetPos, remoteClient);
         }
 
@@ -1136,6 +1399,11 @@ namespace OpenSim.Region.Framework.Scenes
         /// <param name="silent">If true then deletion is not broadcast to clients</param>
         public void DeleteGroupFromScene(bool silent)
         {
+            // We need to keep track of this state in case this group is still queued for backup.
+            m_isDeleted = true;
+
+            DetachFromBackup();
+
             SceneObjectPart[] parts = m_parts.GetArray();
             for (int i = 0; i < parts.Length; i++)
             {
@@ -1147,13 +1415,11 @@ namespace OpenSim.Region.Framework.Scenes
                         avatar.StandUp();
 
                     if (!silent)
-                    {
                         part.UpdateFlag = 0;
-                        if (part == m_rootPart)
-                            avatar.ControllingClient.SendKillObject(m_regionHandle, part.LocalId);
-                    }
                 });
             }
+            
+          
         }
 
         public void AddScriptLPS(int count)
@@ -1250,7 +1516,12 @@ namespace OpenSim.Region.Framework.Scenes
 
         public void SetOwnerId(UUID userId)
         {
-            ForEachPart(delegate(SceneObjectPart part) { part.OwnerID = userId; });
+                ForEachPart(delegate(SceneObjectPart part) 
+                {
+                    
+                    part.OwnerID = userId;
+                    
+                });
         }
 
         public void ForEachPart(Action<SceneObjectPart> whatToDo)
@@ -1286,7 +1557,10 @@ namespace OpenSim.Region.Framework.Scenes
             // any exception propogate upwards.
             try
             {
-                if (!m_scene.ShuttingDown) // if shutting down then there will be nothing to handle the return so leave till next restart
+                if (!m_scene.ShuttingDown || // if shutting down then there will be nothing to handle the return so leave till next restart
+                        m_scene.LoginsDisabled || // We're starting up or doing maintenance, don't mess with things
+                        m_scene.LoadingPrims) // Land may not be valid yet
+                
                 {
                     ILandObject parcel = m_scene.LandChannel.GetLandObject(
                             m_rootPart.GroupPosition.X, m_rootPart.GroupPosition.Y);
@@ -1311,6 +1585,7 @@ namespace OpenSim.Region.Framework.Scenes
                             }
                         }
                     }
+
                 }
 
                 if (HasGroupChanged)
@@ -1318,6 +1593,20 @@ namespace OpenSim.Region.Framework.Scenes
                     // don't backup while it's selected or you're asking for changes mid stream.
                     if (isTimeToPersist() || forcedBackup)
                     {
+                        if (m_rootPart.PhysActor != null &&
+                            (!m_rootPart.PhysActor.IsPhysical))
+                        {
+                            // Possible ghost prim
+                            if (m_rootPart.PhysActor.Position != m_rootPart.GroupPosition)
+                            {
+                                foreach (SceneObjectPart part in m_parts.GetArray())
+                                {
+                                    // Re-set physics actor positions and
+                                    // orientations
+                                    part.GroupPosition = m_rootPart.GroupPosition;
+                                }
+                            }
+                        }
 //                        m_log.DebugFormat(
 //                            "[SCENE]: Storing {0}, {1} in {2}",
 //                            Name, UUID, m_scene.RegionInfo.RegionName);
@@ -1380,81 +1669,106 @@ namespace OpenSim.Region.Framework.Scenes
         /// <returns></returns>
         public SceneObjectGroup Copy(bool userExposed)
         {
-            SceneObjectGroup dupe = (SceneObjectGroup)MemberwiseClone();
-            dupe.m_isBackedUp = false;
-            dupe.m_parts = new MapAndArray<OpenMetaverse.UUID, SceneObjectPart>();
+            SceneObjectGroup dupe;
+            try
+            {
+                m_dupeInProgress = true;
+                dupe = (SceneObjectGroup)MemberwiseClone();
+                dupe.m_isBackedUp = false;
+                dupe.m_parts = new MapAndArray<OpenMetaverse.UUID, SceneObjectPart>();
 
-            // Warning, The following code related to previousAttachmentStatus is needed so that clones of 
-            // attachments do not bordercross while they're being duplicated.  This is hacktastic!
-            // Normally, setting AbsolutePosition will bordercross a prim if it's outside the region!
-            // unless IsAttachment is true!, so to prevent border crossing, we save it's attachment state 
-            // (which should be false anyway) set it as an Attachment and then set it's Absolute Position, 
-            // then restore it's attachment state
+                // Warning, The following code related to previousAttachmentStatus is needed so that clones of 
+                // attachments do not bordercross while they're being duplicated.  This is hacktastic!
+                // Normally, setting AbsolutePosition will bordercross a prim if it's outside the region!
+                // unless IsAttachment is true!, so to prevent border crossing, we save it's attachment state 
+                // (which should be false anyway) set it as an Attachment and then set it's Absolute Position, 
+                // then restore it's attachment state
 
-            // This is only necessary when userExposed is false!
+                // This is only necessary when userExposed is false!
 
-            bool previousAttachmentStatus = dupe.RootPart.IsAttachment;
-            
-            if (!userExposed)
-                dupe.RootPart.IsAttachment = true;
+                bool previousAttachmentStatus = dupe.RootPart.IsAttachment;
 
-            dupe.AbsolutePosition = new Vector3(AbsolutePosition.X, AbsolutePosition.Y, AbsolutePosition.Z);
+                if (!userExposed)
+                    dupe.RootPart.IsAttachment = true;
 
-            if (!userExposed)
-            {
-                dupe.RootPart.IsAttachment = previousAttachmentStatus;
-            }
+                dupe.AbsolutePosition = new Vector3(AbsolutePosition.X, AbsolutePosition.Y, AbsolutePosition.Z);
+
+                if (!userExposed)
+                {
+                    dupe.RootPart.IsAttachment = previousAttachmentStatus;
+                }
 
-            dupe.CopyRootPart(m_rootPart, OwnerID, GroupID, userExposed);
-            dupe.m_rootPart.LinkNum = m_rootPart.LinkNum;
+                dupe.CopyRootPart(m_rootPart, OwnerID, GroupID, userExposed);
+                dupe.m_rootPart.LinkNum = m_rootPart.LinkNum;
 
-            if (userExposed)
-                dupe.m_rootPart.TrimPermissions();
+                if (userExposed)
+                    dupe.m_rootPart.TrimPermissions();
 
-            List<SceneObjectPart> partList = new List<SceneObjectPart>(m_parts.GetArray());
-            
-            partList.Sort(delegate(SceneObjectPart p1, SceneObjectPart p2)
+                /// may need to create a new Physics actor.
+                if (dupe.RootPart.PhysActor != null && userExposed)
                 {
-                    return p1.LinkNum.CompareTo(p2.LinkNum);
+                    PrimitiveBaseShape pbs = dupe.RootPart.Shape;
+
+                    dupe.RootPart.PhysActor = m_scene.PhysicsScene.AddPrimShape(
+                        dupe.RootPart.Name,
+                        pbs,
+                        dupe.RootPart.AbsolutePosition,
+                        dupe.RootPart.Scale,
+                        dupe.RootPart.RotationOffset,
+                        dupe.RootPart.PhysActor.IsPhysical);
+
+                    dupe.RootPart.PhysActor.LocalID = dupe.RootPart.LocalId;
+                    dupe.RootPart.DoPhysicsPropertyUpdate(dupe.RootPart.PhysActor.IsPhysical, true);
                 }
-            );
 
-            foreach (SceneObjectPart part in partList)
-            {
-                if (part.UUID != m_rootPart.UUID)
+                List<SceneObjectPart> partList = new List<SceneObjectPart>(m_parts.GetArray());
+
+                partList.Sort(delegate(SceneObjectPart p1, SceneObjectPart p2)
+                    {
+                        return p1.LinkNum.CompareTo(p2.LinkNum);
+                    }
+                );
+
+                foreach (SceneObjectPart part in partList)
                 {
-                    SceneObjectPart newPart = dupe.CopyPart(part, OwnerID, GroupID, userExposed);
-                    newPart.LinkNum = part.LinkNum;
-                }
+                    if (part.UUID != m_rootPart.UUID)
+                    {
+                        SceneObjectPart newPart = dupe.CopyPart(part, OwnerID, GroupID, userExposed);
+
+                        newPart.LinkNum = part.LinkNum;
+                    }
 
-                // Need to duplicate the physics actor as well
-                if (part.PhysActor != null && userExposed)
+                    // Need to duplicate the physics actor as well            
+                    if (part.PhysActor != null && userExposed)
+                    {
+                        PrimitiveBaseShape pbs = part.Shape;
+        
+                        part.PhysActor 
+                            = m_scene.PhysicsScene.AddPrimShape(
+                                string.Format("{0}/{1}", part.Name, part.UUID),
+                                pbs,
+                                part.AbsolutePosition,
+                                part.Scale,
+                                part.RotationOffset,
+                                part.PhysActor.IsPhysical);
+        
+                        part.PhysActor.LocalID = part.LocalId;
+                        part.DoPhysicsPropertyUpdate(part.PhysActor.IsPhysical, true);
+                    }                
+                }
+                if (userExposed)
                 {
-                    PrimitiveBaseShape pbs = part.Shape;
-    
-                    part.PhysActor 
-                        = m_scene.PhysicsScene.AddPrimShape(
-                            string.Format("{0}/{1}", part.Name, part.UUID),
-                            pbs,
-                            part.AbsolutePosition,
-                            part.Scale,
-                            part.RotationOffset,
-                            part.PhysActor.IsPhysical);
-    
-                    part.PhysActor.LocalID = part.LocalId;
-                    part.DoPhysicsPropertyUpdate(part.PhysActor.IsPhysical, true);
+                    dupe.UpdateParentIDs();
+                    dupe.HasGroupChanged = true;
+                    dupe.AttachToBackup();
+
+                    ScheduleGroupForFullUpdate();
                 }
             }
-            
-            if (userExposed)
+            finally
             {
-                dupe.UpdateParentIDs();
-                dupe.HasGroupChanged = true;
-                dupe.AttachToBackup();
-
-                ScheduleGroupForFullUpdate();
+                m_dupeInProgress = false;
             }
-
             return dupe;
         }
 
@@ -1645,13 +1959,40 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
         
+        public void rotLookAt(Quaternion target, float strength, float damping)
+        {
+            SceneObjectPart rootpart = m_rootPart;
+            if (rootpart != null)
+            {
+                if (IsAttachment)
+                {
+                /*
+                    ScenePresence avatar = m_scene.GetScenePresence(rootpart.AttachedAvatar);
+                    if (avatar != null)
+                    {
+                    Rotate the Av?
+                    } */
+                }
+                else
+                {
+                    if (rootpart.PhysActor != null)
+                    {                                                                   // APID must be implemented in your physics system for this to function.
+                        rootpart.PhysActor.APIDTarget = new Quaternion(target.X, target.Y, target.Z, target.W);
+                        rootpart.PhysActor.APIDStrength = strength;
+                        rootpart.PhysActor.APIDDamping = damping;
+                        rootpart.PhysActor.APIDActive = true;
+                    }
+                }
+            }
+        }
+
         public void stopLookAt()
         {
             SceneObjectPart rootpart = m_rootPart;
             if (rootpart != null)
             {
                 if (rootpart.PhysActor != null)
-                {
+                {                                                       // APID must be implemented in your physics system for this to function.
                     rootpart.PhysActor.APIDActive = false;
                 }
             }
@@ -1717,6 +2058,8 @@ namespace OpenSim.Region.Framework.Scenes
         public SceneObjectPart CopyPart(SceneObjectPart part, UUID cAgentID, UUID cGroupID, bool userExposed)
         {
             SceneObjectPart newPart = part.Copy(m_scene.AllocateLocalId(), OwnerID, GroupID, m_parts.Count, userExposed);
+            newPart.SetParent(this);
+
             AddPart(newPart);
 
             SetPartAsNonRoot(newPart);
@@ -1863,11 +2206,11 @@ namespace OpenSim.Region.Framework.Scenes
         /// Immediately send a full update for this scene object.
         /// </summary>
         public void SendGroupFullUpdate()
-        {
+        {                       
             if (IsDeleted)
                 return;
 
-//            m_log.DebugFormat("[SOG]: Sending immediate full group update for {0} {1}", Name, UUID);
+//            m_log.DebugFormat("[SOG]: Sending immediate full group update for {0} {1}", Name, UUID);            
             
             RootPart.SendFullUpdateToAllClients();
 
@@ -2056,12 +2399,15 @@ namespace OpenSim.Region.Framework.Scenes
                         part.LinkNum += objectGroup.PrimCount;
                     }
                 }
+            }
 
-                linkPart.LinkNum = 2;
+            linkPart.LinkNum = 2;
 
-                linkPart.SetParent(this);
-                linkPart.CreateSelected = true;
+            linkPart.SetParent(this);
+            linkPart.CreateSelected = true;
 
+            lock (m_parts.SyncRoot)
+            {
                 //if (linkPart.PhysActor != null)
                 //{
                 // m_scene.PhysicsScene.RemovePrim(linkPart.PhysActor);
@@ -2218,6 +2564,8 @@ namespace OpenSim.Region.Framework.Scenes
         /// <param name="objectGroup"></param>
         public virtual void DetachFromBackup()
         {
+            m_scene.SceneGraph.FireDetachFromBackup(this);
+
             if (m_isBackedUp)
                 m_scene.EventManager.OnBackup -= ProcessBackup;
             
@@ -2522,6 +2870,17 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
 
+
+
+        /// <summary>
+        /// Gets the number of parts
+        /// </summary>
+        /// <returns></returns>
+        public int GetPartCount()
+        {
+            return Parts.Count();
+        }
+
         /// <summary>
         /// Update the texture entry for this part
         /// </summary>
@@ -2583,11 +2942,9 @@ namespace OpenSim.Region.Framework.Scenes
                 scale.Y = m_scene.m_maxNonphys;
             if (scale.Z > m_scene.m_maxNonphys)
                 scale.Z = m_scene.m_maxNonphys;
-
             SceneObjectPart part = GetChildPart(localID);
             if (part != null)
             {
-                part.Resize(scale);
                 if (part.PhysActor != null)
                 {
                     if (part.PhysActor.IsPhysical)
@@ -2602,7 +2959,7 @@ namespace OpenSim.Region.Framework.Scenes
                     part.PhysActor.Size = scale;
                     m_scene.PhysicsScene.AddPhysicsActorTaint(part.PhysActor);
                 }
-                //if (part.UUID != m_rootPart.UUID)
+                part.Resize(scale);
 
                 HasGroupChanged = true;
                 ScheduleGroupForFullUpdate();
@@ -2624,7 +2981,6 @@ namespace OpenSim.Region.Framework.Scenes
             SceneObjectPart part = GetChildPart(localID);
             if (part != null)
             {
-                part.IgnoreUndoUpdate = true;
                 if (scale.X > m_scene.m_maxNonphys)
                     scale.X = m_scene.m_maxNonphys;
                 if (scale.Y > m_scene.m_maxNonphys)
@@ -2661,7 +3017,7 @@ namespace OpenSim.Region.Framework.Scenes
 
                             if (part.PhysActor != null && part.PhysActor.IsPhysical)
                             {
-                                if (oldSize.X * x > m_scene.m_maxPhys)
+                                if (oldSize.X*x > m_scene.m_maxPhys)
                                 {
                                     f = m_scene.m_maxPhys / oldSize.X;
                                     a = f / x;
@@ -2669,7 +3025,7 @@ namespace OpenSim.Region.Framework.Scenes
                                     y *= a;
                                     z *= a;
                                 }
-                                if (oldSize.Y * y > m_scene.m_maxPhys)
+                                if (oldSize.Y*y > m_scene.m_maxPhys)
                                 {
                                     f = m_scene.m_maxPhys / oldSize.Y;
                                     a = f / y;
@@ -2677,7 +3033,7 @@ namespace OpenSim.Region.Framework.Scenes
                                     y *= a;
                                     z *= a;
                                 }
-                                if (oldSize.Z * z > m_scene.m_maxPhys)
+                                if (oldSize.Z*z > m_scene.m_maxPhys)
                                 {
                                     f = m_scene.m_maxPhys / oldSize.Z;
                                     a = f / z;
@@ -2688,7 +3044,7 @@ namespace OpenSim.Region.Framework.Scenes
                             }
                             else
                             {
-                                if (oldSize.X * x > m_scene.m_maxNonphys)
+                                if (oldSize.X*x > m_scene.m_maxNonphys)
                                 {
                                     f = m_scene.m_maxNonphys / oldSize.X;
                                     a = f / x;
@@ -2696,7 +3052,7 @@ namespace OpenSim.Region.Framework.Scenes
                                     y *= a;
                                     z *= a;
                                 }
-                                if (oldSize.Y * y > m_scene.m_maxNonphys)
+                                if (oldSize.Y*y > m_scene.m_maxNonphys)
                                 {
                                     f = m_scene.m_maxNonphys / oldSize.Y;
                                     a = f / y;
@@ -2704,7 +3060,7 @@ namespace OpenSim.Region.Framework.Scenes
                                     y *= a;
                                     z *= a;
                                 }
-                                if (oldSize.Z * z > m_scene.m_maxNonphys)
+                                if (oldSize.Z*z > m_scene.m_maxNonphys)
                                 {
                                     f = m_scene.m_maxNonphys / oldSize.Z;
                                     a = f / z;
@@ -2714,7 +3070,6 @@ namespace OpenSim.Region.Framework.Scenes
                                 }
                             }
                             obPart.IgnoreUndoUpdate = false;
-                            obPart.StoreUndoState();
                         }
                     }
                 }
@@ -2722,8 +3077,13 @@ namespace OpenSim.Region.Framework.Scenes
                 Vector3 prevScale = part.Scale;
                 prevScale.X *= x;
                 prevScale.Y *= y;
-                prevScale.Z *= z;
+                prevScale.Z *= z;;
+
+                part.IgnoreUndoUpdate = false;
+                part.StoreUndoState(UndoType.STATE_GROUP_SCALE);
+                part.IgnoreUndoUpdate = true;
                 part.Resize(prevScale);
+                part.IgnoreUndoUpdate = false;
 
                 parts = m_parts.GetArray();
                 for (int i = 0; i < parts.Length; i++)
@@ -2732,19 +3092,26 @@ namespace OpenSim.Region.Framework.Scenes
                     obPart.IgnoreUndoUpdate = true;
                     if (obPart.UUID != m_rootPart.UUID)
                     {
-                        Vector3 currentpos = new Vector3(obPart.OffsetPosition);
-                        currentpos.X *= x;
-                        currentpos.Y *= y;
-                        currentpos.Z *= z;
-                        Vector3 newSize = new Vector3(obPart.Scale);
-                        newSize.X *= x;
-                        newSize.Y *= y;
-                        newSize.Z *= z;
-                        obPart.Resize(newSize);
-                        obPart.UpdateOffSet(currentpos);
+                        if (obPart.UUID != m_rootPart.UUID)
+                        {
+                            obPart.IgnoreUndoUpdate = false;
+                            obPart.StoreUndoState(UndoType.STATE_GROUP_SCALE);
+                            obPart.IgnoreUndoUpdate = true;
+
+                            Vector3 currentpos = new Vector3(obPart.OffsetPosition);
+                            currentpos.X *= x;
+                            currentpos.Y *= y;
+                            currentpos.Z *= z;
+                            Vector3 newSize = new Vector3(obPart.Scale);
+                            newSize.X *= x;
+                            newSize.Y *= y;
+                            newSize.Z *= z;
+                            obPart.Resize(newSize);
+                            obPart.UpdateOffSet(currentpos);
+                        }
+                        obPart.IgnoreUndoUpdate = false;
                     }
                     obPart.IgnoreUndoUpdate = false;
-                    obPart.StoreUndoState();
                 }
 
                 if (part.PhysActor != null)
@@ -2754,7 +3121,6 @@ namespace OpenSim.Region.Framework.Scenes
                 }
 
                 part.IgnoreUndoUpdate = false;
-                part.StoreUndoState();
                 HasGroupChanged = true;
                 ScheduleGroupForTerseUpdate();
             }
@@ -2770,14 +3136,11 @@ namespace OpenSim.Region.Framework.Scenes
         /// <param name="pos"></param>
         public void UpdateGroupPosition(Vector3 pos)
         {
-            SceneObjectPart[] parts = m_parts.GetArray();
-            for (int i = 0; i < parts.Length; i++)
-                parts[i].StoreUndoState();
-
             if (m_scene.EventManager.TriggerGroupMove(UUID, pos))
             {
                 if (IsAttachment)
                 {
+                    m_rootPart.StoreUndoState(UndoType.STATE_GROUP_POSITION);
                     m_rootPart.AttachedPos = pos;
                 }
                 if (RootPart.GetStatusSandbox())
@@ -2811,7 +3174,7 @@ namespace OpenSim.Region.Framework.Scenes
 
             SceneObjectPart[] parts = m_parts.GetArray();
             for (int i = 0; i < parts.Length; i++)
-                parts[i].StoreUndoState();
+                parts[i].StoreUndoState(UndoType.STATE_PRIM_POSITION);
 
             if (part != null)
             {
@@ -2836,7 +3199,7 @@ namespace OpenSim.Region.Framework.Scenes
         {
             SceneObjectPart[] parts = m_parts.GetArray();
             for (int i = 0; i < parts.Length; i++)
-                parts[i].StoreUndoState();
+                parts[i].StoreUndoState(UndoType.STATE_PRIM_POSITION);
 
             Vector3 newPos = new Vector3(pos.X, pos.Y, pos.Z);
             Vector3 oldPos =
@@ -2857,10 +3220,27 @@ namespace OpenSim.Region.Framework.Scenes
                     obPart.OffsetPosition = obPart.OffsetPosition + diff;
             }
 
-            AbsolutePosition = newPos;
+            //We have to set undoing here because otherwise an undo state will be saved
+            if (!m_rootPart.Undoing)
+            {
+                m_rootPart.Undoing = true;
+                AbsolutePosition = newPos;
+                m_rootPart.Undoing = false;
+            }
+            else
+            {
+                AbsolutePosition = newPos;
+            }
 
             HasGroupChanged = true;
-            ScheduleGroupForTerseUpdate();
+            if (m_rootPart.Undoing)
+            {
+                ScheduleGroupForFullUpdate();
+            }
+            else
+            {
+                ScheduleGroupForTerseUpdate();
+            }
         }
 
         public void OffsetForNewRegion(Vector3 offset)
@@ -2880,7 +3260,7 @@ namespace OpenSim.Region.Framework.Scenes
         {
             SceneObjectPart[] parts = m_parts.GetArray();
             for (int i = 0; i < parts.Length; i++)
-                parts[i].StoreUndoState();
+                parts[i].StoreUndoState(UndoType.STATE_GROUP_ROTATION);
 
             m_rootPart.UpdateRotation(rot);
 
@@ -2904,7 +3284,7 @@ namespace OpenSim.Region.Framework.Scenes
         {
             SceneObjectPart[] parts = m_parts.GetArray();
             for (int i = 0; i < parts.Length; i++)
-                parts[i].StoreUndoState();
+                parts[i].StoreUndoState(UndoType.STATE_GROUP_ROTATION);
 
             m_rootPart.UpdateRotation(rot);
 
@@ -2929,10 +3309,9 @@ namespace OpenSim.Region.Framework.Scenes
         public void UpdateSingleRotation(Quaternion rot, uint localID)
         {
             SceneObjectPart part = GetChildPart(localID);
-
             SceneObjectPart[] parts = m_parts.GetArray();
             for (int i = 0; i < parts.Length; i++)
-                parts[i].StoreUndoState();
+                parts[i].StoreUndoState(UndoType.STATE_PRIM_ROTATION);
 
             if (part != null)
             {
@@ -2960,15 +3339,24 @@ namespace OpenSim.Region.Framework.Scenes
                 if (part.UUID == m_rootPart.UUID)
                 {
                     UpdateRootRotation(rot);
-                    AbsolutePosition = pos;
+                    if (!m_rootPart.Undoing)
+                    {
+                        m_rootPart.Undoing = true;
+                        AbsolutePosition = pos;
+                        m_rootPart.Undoing = false;
+                    }
+                    else
+                    {
+                        AbsolutePosition = pos;
+                    }
                 }
                 else
                 {
+                    part.StoreUndoState(UndoType.STATE_PRIM_ROTATION);
                     part.IgnoreUndoUpdate = true;
                     part.UpdateRotation(rot);
                     part.OffsetPosition = pos;
                     part.IgnoreUndoUpdate = false;
-                    part.StoreUndoState();
                 }
             }
         }
@@ -2982,7 +3370,13 @@ namespace OpenSim.Region.Framework.Scenes
             Quaternion axRot = rot;
             Quaternion oldParentRot = m_rootPart.RotationOffset;
 
-            m_rootPart.StoreUndoState();
+            m_rootPart.StoreUndoState(UndoType.STATE_PRIM_ROTATION);
+            bool cancelUndo = false;
+            if (!m_rootPart.Undoing)
+            {
+                m_rootPart.Undoing = true;
+                cancelUndo = true;
+            }
             m_rootPart.UpdateRotation(rot);
             if (m_rootPart.PhysActor != null)
             {
@@ -3006,17 +3400,12 @@ namespace OpenSim.Region.Framework.Scenes
                     newRot *= Quaternion.Inverse(axRot);
                     prim.RotationOffset = newRot;
                     prim.ScheduleTerseUpdate();
+                    prim.IgnoreUndoUpdate = false;
                 }
             }
-
-            for (int i = 0; i < parts.Length; i++)
+            if (cancelUndo == true)
             {
-                SceneObjectPart childpart = parts[i];
-                if (childpart != m_rootPart)
-                {
-                    childpart.IgnoreUndoUpdate = false;
-                    childpart.StoreUndoState();
-                }
+                m_rootPart.Undoing = false;
             }
 
             m_rootPart.ScheduleTerseUpdate();
@@ -3242,7 +3631,6 @@ namespace OpenSim.Region.Framework.Scenes
         public float GetMass()
         {
             float retmass = 0f;
-
             SceneObjectPart[] parts = m_parts.GetArray();
             for (int i = 0; i < parts.Length; i++)
                 retmass += parts[i].GetMass();
@@ -3358,6 +3746,14 @@ namespace OpenSim.Region.Framework.Scenes
             SetFromItemID(uuid);
         }
 
+        public void ResetOwnerChangeFlag()
+        {
+            ForEachPart(delegate(SceneObjectPart part)
+            {
+                part.ResetOwnerChangeFlag();
+            });
+        }
+
         #endregion
     }
 }