6 files changed, 143 insertions, 33 deletions

diff --git a/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs b/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs
index a516a54..66631b5 100644
--- a/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs
+++ b/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs
@@ -331,6 +331,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         /// </value>
         protected HashSet<uint> m_killRecord;
         
+//        protected HashSet<uint> m_attachmentsSent;        
+        
         private int m_moneyBalance;
         private int m_animationSequenceNumber = 1;
         private bool m_SendLogoutPacketWhenClosing = true;
@@ -427,6 +429,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             m_entityUpdates = new PriorityQueue(m_scene.Entities.Count);
             m_fullUpdateDataBlocksBuilder = new List<ObjectUpdatePacket.ObjectDataBlock>();
             m_killRecord = new HashSet<uint>();
+//            m_attachmentsSent = new HashSet<uint>();            
 
             m_assetService = m_scene.RequestModuleInterface<IAssetService>();
             m_hyperAssets = m_scene.RequestModuleInterface<IHyperAssetService>();
@@ -3411,6 +3414,9 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             objupdate.ObjectData[0] = CreateAvatarUpdateBlock(presence);
 
             OutPacket(objupdate, ThrottleOutPacketType.Task);
+            
+            // We need to record the avatar local id since the root prim of an attachment points to this.
+//            m_attachmentsSent.Add(avatar.LocalId);            
         }
 
         public void SendCoarseLocationUpdate(List<UUID> users, List<Vector3> CoarseLocations)
@@ -3466,7 +3472,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             double priority = m_prioritizer.GetUpdatePriority(this, entity);
 
             lock (m_entityUpdates.SyncRoot)
-                m_entityUpdates.Enqueue(priority, new EntityUpdate(entity, updateFlags), entity.LocalId);
+                m_entityUpdates.Enqueue(priority, new EntityUpdate(entity, updateFlags), entity.LocalId);                  
         }
 
         private void ProcessEntityUpdates(int maxUpdates)
@@ -3542,9 +3548,42 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                     if (!canUseImproved && !canUseCompressed)
                     {
                         if (update.Entity is ScenePresence)
+                        {
                             objectUpdateBlocks.Value.Add(CreateAvatarUpdateBlock((ScenePresence)update.Entity));
+                        }
                         else
-                            objectUpdateBlocks.Value.Add(CreatePrimUpdateBlock((SceneObjectPart)update.Entity, this.m_agentId));
+                        {
+//                            if (update.Entity is SceneObjectPart && ((SceneObjectPart)update.Entity).IsAttachment)
+//                            {
+//                                SceneObjectPart sop = (SceneObjectPart)update.Entity;
+//                                string text = sop.Text;
+//                                if (text.IndexOf("\n") >= 0)
+//                                    text = text.Remove(text.IndexOf("\n"));
+//                                
+//                                if (m_attachmentsSent.Contains(sop.ParentID))
+//                                {
+////                                    m_log.DebugFormat(
+////                                        "[CLIENT]: Sending full info about attached prim {0} text {1}",
+////                                        sop.LocalId, text);
+//                                    
+//                                    objectUpdateBlocks.Value.Add(CreatePrimUpdateBlock(sop, this.m_agentId));
+//                                    
+//                                    m_attachmentsSent.Add(sop.LocalId);
+//                                }
+//                                else
+//                                {
+//                                    m_log.DebugFormat(
+//                                        "[CLIENT]: Requeueing full update of prim {0} text {1} since we haven't sent its parent {2} yet", 
+//                                        sop.LocalId, text, sop.ParentID);
+//                                    
+//                                    m_entityUpdates.Enqueue(double.MaxValue, update, sop.LocalId);                  
+//                                }
+//                            }
+//                            else
+//                            {                            
+                                objectUpdateBlocks.Value.Add(CreatePrimUpdateBlock((SceneObjectPart)update.Entity, this.m_agentId));
+//                            }
+                        }
                     }
                     else if (!canUseImproved)
                     {
diff --git a/OpenSim/Region/Framework/Scenes/Prioritizer.cs b/OpenSim/Region/Framework/Scenes/Prioritizer.cs
index 1eb0c28..4780cdd 100644
--- a/OpenSim/Region/Framework/Scenes/Prioritizer.cs
+++ b/OpenSim/Region/Framework/Scenes/Prioritizer.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using log4net;
 using Nini.Config;
@@ -32,6 +32,15 @@ namespace OpenSim.Region.Framework.Scenes
     public class Prioritizer
     {
         private static readonly ILog m_log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
+        
+        /// <summary>
+        /// This is added to the priority of all child prims, to make sure that the root prim update is sent to the
+        /// viewer before child prim updates.  
+        /// The adjustment is added to child prims and subtracted from root prims, so the gap ends up
+        /// being double.  We do it both ways so that there is a still a priority delta even if the priority is already
+        /// double.MinValue or double.MaxValue.
+        /// </summary>
+        private double m_childPrimAdjustmentFactor = 0.05;
 
         private Scene m_scene;
 
@@ -42,21 +51,50 @@ namespace OpenSim.Region.Framework.Scenes
 
         public double GetUpdatePriority(IClientAPI client, ISceneEntity entity)
         {
+            double priority = 0;
+            
             switch (m_scene.UpdatePrioritizationScheme)
             {
                 case UpdatePrioritizationSchemes.Time:
-                    return GetPriorityByTime();
+                    priority = GetPriorityByTime();
+                    break;
                 case UpdatePrioritizationSchemes.Distance:
-                    return GetPriorityByDistance(client, entity);
+                    priority = GetPriorityByDistance(client, entity);
+                    break;
                 case UpdatePrioritizationSchemes.SimpleAngularDistance:
-                    return GetPriorityByDistance(client, entity); // TODO: Reimplement SimpleAngularDistance
+                    priority = GetPriorityByDistance(client, entity); // TODO: Reimplement SimpleAngularDistance
+                    break;
                 case UpdatePrioritizationSchemes.FrontBack:
-                    return GetPriorityByFrontBack(client, entity);
+                    priority = GetPriorityByFrontBack(client, entity);
+                    break;
                 case UpdatePrioritizationSchemes.BestAvatarResponsiveness:
-                    return GetPriorityByBestAvatarResponsiveness(client, entity);
+                    priority = GetPriorityByBestAvatarResponsiveness(client, entity);
+                    break;
                 default:
                     throw new InvalidOperationException("UpdatePrioritizationScheme not defined.");
+                    break;
             }
+            
+            // Adjust priority so that root prims are sent to the viewer first.  This is especially important for 
+            // attachments acting as huds, since current viewers fail to display hud child prims if their updates
+            // arrive before the root one.
+            if (entity is SceneObjectPart)
+            {
+                SceneObjectPart sop = ((SceneObjectPart)entity);
+                
+                if (sop.IsRoot)
+                {
+                    if (priority >= double.MinValue + m_childPrimAdjustmentFactor)
+                        priority -= m_childPrimAdjustmentFactor;
+                }
+                else
+                {
+                    if (priority <= double.MaxValue - m_childPrimAdjustmentFactor)
+                        priority += m_childPrimAdjustmentFactor;
+                }
+            }
+            
+            return priority;
         }
 
         private double GetPriorityByTime()
diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index 2544359..4e90d09 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -2066,8 +2066,34 @@ namespace OpenSim.Region.Framework.Scenes
             sceneObject.ScheduleGroupForFullUpdate();
 
             return sceneObject;
+        }    
+        
+        /// <summary>
+        /// Add an object into the scene that has come from storage
+        /// </summary>
+        ///
+        /// <param name="sceneObject"></param>
+        /// <param name="attachToBackup">
+        /// If true, changes to the object will be reflected in its persisted data
+        /// If false, the persisted data will not be changed even if the object in the scene is changed
+        /// </param>
+        /// <param name="alreadyPersisted">
+        /// If true, we won't persist this object until it changes
+        /// If false, we'll persist this object immediately
+        /// </param>
+        /// <param name="sendClientUpdates">
+        /// If true, we send updates to the client to tell it about this object
+        /// If false, we leave it up to the caller to do this
+        /// </param>
+        /// <returns>
+        /// true if the object was added, false if an object with the same uuid was already in the scene
+        /// </returns>
+        public bool AddRestoredSceneObject(
+            SceneObjectGroup sceneObject, bool attachToBackup, bool alreadyPersisted, bool sendClientUpdates)
+        {
+            return m_sceneGraph.AddRestoredSceneObject(sceneObject, attachToBackup, alreadyPersisted, sendClientUpdates);
         }
-
+        
         /// <summary>
         /// Add an object into the scene that has come from storage
         /// </summary>
@@ -2087,7 +2113,7 @@ namespace OpenSim.Region.Framework.Scenes
         public bool AddRestoredSceneObject(
             SceneObjectGroup sceneObject, bool attachToBackup, bool alreadyPersisted)
         {
-            return m_sceneGraph.AddRestoredSceneObject(sceneObject, attachToBackup, alreadyPersisted);
+            return AddRestoredSceneObject(sceneObject, attachToBackup, alreadyPersisted, true);
         }
 
         /// <summary>
@@ -2527,7 +2553,10 @@ namespace OpenSim.Region.Framework.Scenes
                 sceneObject.RootPart.AddFlag(PrimFlags.TemporaryOnRez);
                 sceneObject.RootPart.AddFlag(PrimFlags.Phantom);
 
-                AddRestoredSceneObject(sceneObject, false, false);
+                      
+                // Don't sent a full update here because this will cause full updates to be sent twice for 
+                // attachments on region crossings, resulting in viewer glitches.                
+                AddRestoredSceneObject(sceneObject, false, false, false);
 
                 // Handle attachment special case
                 SceneObjectPart RootPrim = sceneObject.RootPart;
@@ -2554,12 +2583,13 @@ namespace OpenSim.Region.Framework.Scenes
                     m_log.DebugFormat(
                         "[ATTACHMENT]: Attach to avatar {0} at position {1}", sp.UUID, grp.AbsolutePosition);
 
+                    RootPrim.RemFlag(PrimFlags.TemporaryOnRez);
+                    
                     if (AttachmentsModule != null)
                         AttachmentsModule.AttachObject(
                             sp.ControllingClient, grp.LocalId, (uint)0, grp.GroupRotation, grp.AbsolutePosition, false);
-                    
-                    RootPrim.RemFlag(PrimFlags.TemporaryOnRez);
-                    grp.SendGroupFullUpdate();
+
+                    //grp.SendGroupFullUpdate();
                 }
                 else
                 {
diff --git a/OpenSim/Region/Framework/Scenes/SceneGraph.cs b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
index a02f614..5902080 100644
--- a/OpenSim/Region/Framework/Scenes/SceneGraph.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
@@ -222,11 +222,15 @@ namespace OpenSim.Region.Framework.Scenes
         /// If true, we won't persist this object until it changes
         /// If false, we'll persist this object immediately
         /// </param>
+        /// <param name="sendClientUpdates">
+        /// If true, we send updates to the client to tell it about this object
+        /// If false, we leave it up to the caller to do this
+        /// </param>
         /// <returns>
         /// true if the object was added, false if an object with the same uuid was already in the scene
         /// </returns>
         protected internal bool AddRestoredSceneObject(
-            SceneObjectGroup sceneObject, bool attachToBackup, bool alreadyPersisted)
+            SceneObjectGroup sceneObject, bool attachToBackup, bool alreadyPersisted, bool sendClientUpdates)
         {
             if (!alreadyPersisted)
             {
@@ -234,9 +238,9 @@ namespace OpenSim.Region.Framework.Scenes
                 sceneObject.HasGroupChanged = true;
             }
 
-            return AddSceneObject(sceneObject, attachToBackup, true);
+            return AddSceneObject(sceneObject, attachToBackup, sendClientUpdates);
         }
-
+                
         /// <summary>
         /// Add a newly created object to the scene.  This will both update the scene, and send information about the
         /// new object to all clients interested in the scene.
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index 837d3a2..78c2566 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -2012,7 +2012,8 @@ namespace OpenSim.Region.Framework.Scenes
         /// </summary>
         public void ScheduleGroupForFullUpdate()
         {
-//            m_log.DebugFormat("[SOG]: Scheduling full update for {0} {1}", Name, UUID);
+            if (IsAttachment)
+                m_log.DebugFormat("[SOG]: Scheduling full update for {0} {1}", Name, LocalId);
             
             checkAtTargets();
             RootPart.ScheduleFullUpdate();
diff --git a/bin/OpenSim.ini.example b/bin/OpenSim.ini.example
index 2a70e96..38febc2 100644
--- a/bin/OpenSim.ini.example
+++ b/bin/OpenSim.ini.example
@@ -1171,44 +1171,42 @@
 [Groups]
     Enabled = false
 
-    ; This is the current groups stub in Region.CoreModules.Avatar.Groups
+    ; This is the current groups stub in Region.CoreModules.Avatar.Groups.  All the other settings below only really
+    ; apply to the Flotsam/SimianGrid GroupsModule
     Module  = Default
 
-    ; The PHP code for the server is available from the Flotsam project for you to deploy
-    ; to your own server.  The Flotsam project is located at http://code.google.com/p/flotsam/
-    ;
+    ; This module can use a PHP XmlRpc server from the Flotsam project at http://code.google.com/p/flotsam/
+    ; or from the SimianGrid project at http://code.google.com/p/openmetaverse
     ;Module  = GroupsModule
 
     ; Enable Group Notices
-    ;NoticesEnabled   = true
+    ;NoticesEnabled   = true 
 
     ; This makes the Groups modules very chatty on the console.
     DebugEnabled     = false
 
     ; Specify which messaging module to use for groups messaging and if it's enabled
     ;MessagingModule = GroupsMessagingModule
-    ;MessagingEnabled = true
-
-    ; Service connector to Groups Service [Select One] ServicesConnectorModule
+    ;MessagingEnabled = true 
 
-        
-    ; Simian Grid Service for Groups
+    ; Service connectors to the Groups Service.  Select one depending on whether you're using a Flotsam XmlRpc backend or a SimianGrid backend
+  
+    ; SimianGrid Service for Groups
     ;ServicesConnectorModule = SimianGroupsServicesConnector
     ;GroupsServerURI = http://mygridserver.com:82/Grid/
 
-    ; XmlRpc Service Connector to the Flotsam XmlRpc Groups Service settings
+    ; Flotsam XmlRpc Service for Groups
     ;ServicesConnectorModule = XmlRpcGroupsServicesConnector
     ;GroupsServerURI        = http://yourxmlrpcserver.com/xmlrpc.php
 
-    ; XmlRpc Service Settings
-    ;XmlRpcServiceReadKey    = 1234
-    ;XmlRpcServiceWriteKey   = 1234
+    ; XmlRpc Security settings.  These must match those set on your backend groups service.
+    ;XmlRpcServiceReadKey    = 1234 
+    ;XmlRpcServiceWriteKey   = 1234 
 
     ; Disables HTTP Keep-Alive for XmlRpcGroupsServicesConnector HTTP Requests,
     ; this is a work around fora problem discovered on some Windows based region servers.
     ; Only disable keep alive if you see a large number (dozens) of the following Exceptions:
     ; System.Net.WebException: The request was aborted: The request was canceled.
-    ;
     ; XmlRpcDisableKeepAlive = false