4 files changed, 89 insertions, 16 deletions

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();