6 files changed, 93 insertions, 22 deletions

diff --git a/OpenSim/Framework/Util.cs b/OpenSim/Framework/Util.cs
index f0ad1d5..c1429df 100644
--- a/OpenSim/Framework/Util.cs
+++ b/OpenSim/Framework/Util.cs
@@ -347,6 +347,12 @@ namespace OpenSim.Framework
             return (x + y - (min >> 1) - (min >> 2) + (min >> 4));
         }
 
+        public static bool IsOutsideView(uint oldx, uint newx, uint oldy, uint newy)
+        {
+            // Eventually this will be a function of the draw distance / camera position too.
+            return ((Math.Abs((int)(oldx - newx)) > 1) || (Math.Abs((int)(oldy - newy)) > 1));
+        }
+
         public static string FieldToString(byte[] bytes)
         {
             return FieldToString(bytes, String.Empty);
diff --git a/OpenSim/Region/Communications/Hypergrid/HGGridServicesStandalone.cs b/OpenSim/Region/Communications/Hypergrid/HGGridServicesStandalone.cs
index 5fb9615..329bae5 100644
--- a/OpenSim/Region/Communications/Hypergrid/HGGridServicesStandalone.cs
+++ b/OpenSim/Region/Communications/Hypergrid/HGGridServicesStandalone.cs
@@ -644,6 +644,7 @@ namespace OpenSim.Region.Communications.Hypergrid
 
         public override bool TellRegionToCloseChildConnection(ulong regionHandle, UUID agentID)
         {
+            m_log.Debug("[HGrid]: TellRegion " + regionHandle + " ToCloseChildConnection for " + agentID);
             RegionInfo regInfo = null;
             try
             {
diff --git a/OpenSim/Region/Environment/Scenes/Hypergrid/HGSceneCommunicationService.cs b/OpenSim/Region/Environment/Scenes/Hypergrid/HGSceneCommunicationService.cs
index 5d34773..b6fd798 100644
--- a/OpenSim/Region/Environment/Scenes/Hypergrid/HGSceneCommunicationService.cs
+++ b/OpenSim/Region/Environment/Scenes/Hypergrid/HGSceneCommunicationService.cs
@@ -222,25 +222,28 @@ namespace OpenSim.Region.Environment.Scenes.Hypergrid
                             KiPrimitive(avatar.LocalId);
                         }
 
-                        avatar.Close();
 
                         uint newRegionX = (uint)(reg.RegionHandle >> 40);
                         uint newRegionY = (((uint)(reg.RegionHandle)) >> 8);
                         uint oldRegionX = (uint)(m_regionInfo.RegionHandle >> 40);
                         uint oldRegionY = (((uint)(m_regionInfo.RegionHandle)) >> 8);
+
+                        // Let's close some children agents
+                        if (isHyperLink) // close them all
+                            SendCloseChildAgentConnections(avatar.UUID, avatar.GetKnownRegionList());
+                        else // close just a few
+                            avatar.CloseChildAgents(newRegionX, newRegionY);
+                        
+                        avatar.Close();
+                        
+                        // Finally, let's close this previously-known-as-root agent, when the jump is outside the view zone
                         ///
                         /// Hypergrid mod: extra check for isHyperLink
                         /// 
-                        if ((Util.fast_distance2d((int)(newRegionX - oldRegionX), (int)(newRegionY - oldRegionY)) > 3) || isHyperLink)
+                        //if ((Util.fast_distance2d((int)(newRegionX - oldRegionX), (int)(newRegionY - oldRegionY)) > 1) || isHyperLink)
+                        //if (((int)Math.Abs((int)(newRegionX - oldRegionX)) > 1) || ((int)Math.Abs((int)(newRegionY - oldRegionY)) > 1) || isHyperLink)
+                        if (Util.IsOutsideView(oldRegionX, newRegionX, oldRegionY, newRegionY))
                         {
-                            //SendCloseChildAgentConnections(avatar.UUID, avatar.GetKnownRegionList());
-                            SendCloseChildAgentConnections(avatar.UUID, childRegions);
-                            if (eq != null)
-                            {
-                                OSD Item = EventQueueHelper.DisableSimulator(m_regionInfo.RegionHandle);
-                                eq.Enqueue(Item, avatar.UUID);
-                            }
-                            Thread.Sleep(2000);
                             CloseConnection(avatar.UUID);
                         }
                         // if (teleport success) // seems to be always success here
diff --git a/OpenSim/Region/Environment/Scenes/Scene.cs b/OpenSim/Region/Environment/Scenes/Scene.cs
index f4bb2d3..7e13671 100644
--- a/OpenSim/Region/Environment/Scenes/Scene.cs
+++ b/OpenSim/Region/Environment/Scenes/Scene.cs
@@ -52,6 +52,7 @@ using Caps = OpenSim.Framework.Communications.Capabilities.Caps;
 using Image = System.Drawing.Image;
 using TPFlags = OpenSim.Framework.Constants.TeleportFlags;
 using Timer = System.Timers.Timer;
+using OSD = OpenMetaverse.StructuredData.OSD;
 
 namespace OpenSim.Region.Environment.Scenes
 {
@@ -2807,9 +2808,10 @@ namespace OpenSim.Region.Environment.Scenes
 
             capsPaths[agent.AgentID] = agent.CapsPath;
 
+            AddCapsHandler(agent.AgentID);
+
             if (!agent.child)
             {
-                AddCapsHandler(agent.AgentID);
 
                 // Honor parcel landing type and position.
                 ILandObject land = LandChannel.GetLandObject(agent.startpos.X, agent.startpos.Y);
@@ -3027,7 +3029,18 @@ namespace OpenSim.Region.Environment.Scenes
                 // }
 
                 // Tell a single agent to disconnect from the region.
+                // This sends DisableSimulator over UDP, but that doesn't seem to be working
+                // well with the latest LL viewer, so we're sending it also via the EQ
                 presence.ControllingClient.SendShutdownConnectionNotice();
+                IEventQueue eq = RequestModuleInterface<IEventQueue>();
+                if (eq != null)
+                {
+                    OSD Item = EventQueueHelper.DisableSimulator(m_regInfo.RegionHandle);
+                    eq.Enqueue(Item, agentID);
+                    m_log.Debug("[Scene]: Enqueuing DisableSimulator for " + agentID + " in region " + m_regInfo.RegionName);
+                    Thread.Sleep(2000);
+                }
+                RemoveCapsHandler(agentID);
 
                 presence.ControllingClient.Close(true);
             }
diff --git a/OpenSim/Region/Environment/Scenes/SceneCommunicationService.cs b/OpenSim/Region/Environment/Scenes/SceneCommunicationService.cs
index 54d4298..2268b28 100644
--- a/OpenSim/Region/Environment/Scenes/SceneCommunicationService.cs
+++ b/OpenSim/Region/Environment/Scenes/SceneCommunicationService.cs
@@ -230,7 +230,7 @@ namespace OpenSim.Region.Environment.Scenes
         protected bool CloseConnection(UUID agentID)
         {
             m_log.Debug("[INTERREGION]: Incoming Agent Close Request for agent: " + agentID);
-            
+
             handlerCloseAgentConnection = OnCloseAgentConnection;
             if (handlerCloseAgentConnection != null)
             {
@@ -727,24 +727,31 @@ namespace OpenSim.Region.Environment.Scenes
                             KiPrimitive(avatar.LocalId);
                         }
 
-                        avatar.Close();
 
                         uint newRegionX = (uint)(reg.RegionHandle >> 40);
                         uint newRegionY = (((uint)(reg.RegionHandle)) >> 8);
                         uint oldRegionX = (uint)(m_regionInfo.RegionHandle >> 40);
                         uint oldRegionY = (((uint)(m_regionInfo.RegionHandle)) >> 8);
-                        if (Util.fast_distance2d((int)(newRegionX - oldRegionX), (int)(newRegionY - oldRegionY)) > 3)
+
+                        // Let's close some children agents
+                        avatar.CloseChildAgents(newRegionX, newRegionY);
+
+                        avatar.Close();
+
+                        // Finally, let's close this previously-known-as-root agent, when the jump is outside the view zone
+
+                        // This is a little too fast of a distance computation... it's not consistent with the rule
+                        // of having child agents in exactly the adjacent regions. Some topologies result in orphan
+                        // children
+                        //if (Util.fast_distance2d((int)(newRegionX - oldRegionX), (int)(newRegionY - oldRegionY)) > 3)
+                        //if (((int)Math.Abs((int)(newRegionX - oldRegionX)) > 1) || ((int)Math.Abs((int)(newRegionY - oldRegionY)) > 1))
+                        if (Util.IsOutsideView(oldRegionX, newRegionX, oldRegionY, newRegionY))
                         {
                             //SendCloseChildAgentConnections(avatar.UUID,avatar.GetKnownRegionList());
-                            SendCloseChildAgentConnections(avatar.UUID, childRegions);
-                            if (eq != null)
-                            {
-                                OSD Item = EventQueueHelper.DisableSimulator(m_regionInfo.RegionHandle);
-                                eq.Enqueue(Item, avatar.UUID);
-                            }
-                            Thread.Sleep(2000);
+                            //SendCloseChildAgentConnections(avatar.UUID, childRegions);
                             CloseConnection(avatar.UUID);
                         }
+
                         // if (teleport success) // seems to be always success here
                         // the user may change their profile information in other region,
                         // so the userinfo in UserProfileCache is not reliable any more, delete it
diff --git a/OpenSim/Region/Environment/Scenes/ScenePresence.cs b/OpenSim/Region/Environment/Scenes/ScenePresence.cs
index b85fd93..c26f862 100644
--- a/OpenSim/Region/Environment/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Environment/Scenes/ScenePresence.cs
@@ -2373,7 +2373,10 @@ namespace OpenSim.Region.Environment.Scenes
 
                     CrossAttachmentsIntoNewRegion(neighbourHandle, true);
 
-//                    m_scene.SendKillObject(m_localId);
+                    // Next, let's close the child agent connections that are too far away.
+                    CloseChildAgents(neighbourx, neighboury);
+
+                    //                    m_scene.SendKillObject(m_localId);
 
                     m_scene.NotifyMyCoarseLocationChange();
                     // the user may change their profile information in other region,
@@ -2391,6 +2394,44 @@ namespace OpenSim.Region.Environment.Scenes
             }
         }
 
+        /// <summary>
+        /// Computes which child agents to close when the scene presence moves to another region.
+        /// Removes those regions from m_knownRegions.
+        /// </summary>
+        /// <param name="newRegionX">The new region's x on the map</param>
+        /// <param name="newRegionY">The new region's y on the map</param>
+        /// <returns></returns>
+        public void CloseChildAgents(uint newRegionX, uint newRegionY)
+        {
+            List<ulong> byebyeRegions = new List<ulong>();
+
+            foreach (ulong handle in m_knownChildRegions)
+            {
+                uint x, y;
+                Utils.LongToUInts(handle, out x, out y);
+                x = x / Constants.RegionSize;
+                y = y / Constants.RegionSize;
+
+                if (Util.IsOutsideView(x, newRegionX, y, newRegionY))
+                {
+                    Console.WriteLine("---> x: " + x + "; newx:" + newRegionX + "; Abs:" + (int)Math.Abs(x-newRegionX));
+                    Console.WriteLine("---> y: " + y + "; newy:" + newRegionY);
+                    byebyeRegions.Add(handle);
+                }
+            }
+            foreach (ulong handle in byebyeRegions)
+            {
+                RemoveNeighbourRegion(handle);
+            }
+
+            if (byebyeRegions.Count > 0)
+            {
+                m_log.Info("[AVATAR]: Closing " + byebyeRegions.Count + " child agents");
+                m_scene.SceneGridService.SendCloseChildAgentConnections(m_controllingClient.AgentId, byebyeRegions);
+            }
+
+        }
+
         #endregion
 
         /// <summary>