take taints check terrain out of Onframe event and add a new event for it. Slow it down to 1/4 heartbeat rate (once every 363ms aprox)

OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs

@@ -229,11 +229,11 @@ namespace OpenSim.Region.CoreModules.World.Terrain
                 }
 
                 m_scene.RegisterModuleInterface<ITerrainModule>(this);
-                m_scene.EventManager.OnFrame += EventManager_OnFrame;
                 m_scene.EventManager.OnNewClient += EventManager_OnNewClient;
                 m_scene.EventManager.OnClientClosed += EventManager_OnClientClosed;
                 m_scene.EventManager.OnPluginConsole += EventManager_OnPluginConsole;
                 m_scene.EventManager.OnTerrainTick += EventManager_OnTerrainTick;
+                m_scene.EventManager.OnTerrainCheckUpdates += EventManager_TerrainCheckUpdates;
             }
 
             InstallDefaultEffects();
@@ -272,7 +272,7 @@ namespace OpenSim.Region.CoreModules.World.Terrain
                 // remove the commands
                 m_scene.UnregisterModuleCommander(m_commander.Name);
                 // remove the event-handlers
-                m_scene.EventManager.OnFrame -= EventManager_OnFrame;
+                m_scene.EventManager.OnTerrainCheckUpdates -= EventManager_TerrainCheckUpdates;
                 m_scene.EventManager.OnTerrainTick -= EventManager_OnTerrainTick;
                 m_scene.EventManager.OnPluginConsole -= EventManager_OnPluginConsole;
                 m_scene.EventManager.OnClientClosed -= EventManager_OnClientClosed;
@@ -759,13 +759,12 @@ namespace OpenSim.Region.CoreModules.World.Terrain
         }
 
         /// <summary>
-        /// Called before processing of every simulation frame.
         /// This is used to check to see of any of the terrain is tainted and, if so, schedule
         /// updates for all the presences.
         /// This also checks to see if there are updates that need to be sent for each presence.
         /// This is where the logic is to send terrain updates to clients.
         /// </summary>
-        private void EventManager_OnFrame()
+        private void EventManager_TerrainCheckUpdates()
         {
             // this needs fixing
             TerrainData terrData = m_channel.GetTerrainData();
@@ -775,7 +774,7 @@ namespace OpenSim.Region.CoreModules.World.Terrain
             {
                 for (int y = 0; y < terrData.SizeY; y += Constants.TerrainPatchSize)
                 {
-                    if (terrData.IsTaintedAt(x, y))
+                    if (terrData.IsTaintedAt(x, y,true))
                     {
                         // Found a patch that was modified. Push this flag into the clients.
                         SendToClients(terrData, x, y);

OpenSim/Region/Framework/Scenes/EventManager.cs

@@ -80,6 +80,7 @@ namespace OpenSim.Region.Framework.Scenes
         public event OnTerrainTaintedDelegate OnTerrainTainted;
 
         public delegate void OnTerrainTickDelegate();
+        public delegate void OnTerrainCheckUpdatesDelegate();
 
         /// <summary>
         /// Triggered if the terrain has been edited
@@ -89,6 +90,7 @@ namespace OpenSim.Region.Framework.Scenes
         /// but is used by core solely to update the physics engine.
         /// </remarks>
         public event OnTerrainTickDelegate OnTerrainTick;
+        public event OnTerrainCheckUpdatesDelegate OnTerrainCheckUpdates;
 
         public delegate void OnTerrainUpdateDelegate();
 
@@ -1484,6 +1486,27 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
 
+        public void TriggerTerrainCheckUpdates()
+        {
+            OnTerrainCheckUpdatesDelegate TerrainCheckUpdates = OnTerrainCheckUpdates;
+            if (TerrainCheckUpdates != null)
+            {
+                foreach (OnTerrainCheckUpdatesDelegate d in TerrainCheckUpdates.GetInvocationList())
+                {
+                    try
+                    {
+                        d();
+                    }
+                    catch (Exception e)
+                    {
+                        m_log.ErrorFormat(
+                            "[EVENT MANAGER]: Delegate for TerrainCheckUpdates failed - continuing.  {0} {1}",
+                            e.Message, e.StackTrace);
+                    }
+                }
+            }
+        }
+
         public void TriggerTerrainTainted()
         {
             OnTerrainTaintedDelegate handlerTerrainTainted = OnTerrainTainted;

OpenSim/Region/Framework/Scenes/Scene.cs

@@ -245,8 +245,8 @@ namespace OpenSim.Region.Framework.Scenes
             get { return m_defaultDrawDistance; }
         }
 
-//        protected float m_maxDrawDistance = 512.0f;
+        protected float m_maxDrawDistance = 512.0f;
-        protected float m_maxDrawDistance = 256.0f;
+//        protected float m_maxDrawDistance = 256.0f;
         public float MaxDrawDistance
         {
             get { return m_maxDrawDistance; }
@@ -1581,13 +1581,20 @@ namespace OpenSim.Region.Framework.Scenes
                     EventManager.TriggerRegionHeartbeatStart(this);
 
                     // Apply taints in terrain module to terrain in physics scene
+
+                    tmpMS = Util.EnvironmentTickCount();
+                    if (Frame % 4 == 0)
+                    {
+                        CheckTerrainUpdates();
+                    }
+
                     if (Frame % m_update_terrain == 0)
                     {
-                        tmpMS = Util.EnvironmentTickCount();
                         UpdateTerrain();
-                        terrainMS = Util.EnvironmentTickCountSubtract(tmpMS);
                     }
 
+                    terrainMS = Util.EnvironmentTickCountSubtract(tmpMS);
+
                     tmpMS = Util.EnvironmentTickCount();
                     if (PhysicsEnabled && Frame % m_update_physics == 0)
                         m_sceneGraph.UpdatePreparePhysics();
@@ -1809,6 +1816,11 @@ namespace OpenSim.Region.Framework.Scenes
             EventManager.TriggerTerrainTick();
         }
 
+        private void CheckTerrainUpdates()
+        {
+            EventManager.TriggerTerrainCheckUpdates();
+        }
+
         /// <summary>
         /// Back up queued up changes
         /// </summary>
@@ -5880,11 +5892,12 @@ Environment.Exit(1);
         /// or corssing the broder walking, but will NOT prevent
         /// child agent creation, thereby emulating the SL behavior.
         /// </remarks>
-        /// <param name='agentID'></param>
+        /// <param name='agentID'>The visitor's User ID</param>
+        /// <param name="agentHomeURI">The visitor's Home URI (may be null)</param>
         /// <param name='position'></param>
         /// <param name='reason'></param>
         /// <returns></returns>
-        public bool QueryAccess(UUID agentID, Vector3 position, out string reason)
+        public bool QueryAccess(UUID agentID, string agentHomeURI, bool viaTeleport, Vector3 position, out string reason)
         {
             reason = "You are banned from the region";
 
@@ -5894,6 +5907,10 @@ Environment.Exit(1);
                 return true;
             }
 
+
+//            if (!AllowAvatarCrossing && !viaTeleport)
+//                return false;
+
             // FIXME: Root agent count is currently known to be inaccurate.  This forces a recount before we check.
             // However, the long term fix is to make sure root agent count is always accurate.
             m_sceneGraph.RecalculateStats();