11 files changed, 327 insertions, 53 deletions

diff --git a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
index 25334b9..974fd57 100644
--- a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
+++ b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
@@ -33,6 +33,7 @@ using System.Threading;
 using OpenSim.Framework;
 using OpenSim.Framework.Capabilities;
 using OpenSim.Framework.Client;
+using OpenSim.Framework.Monitoring;
 using OpenSim.Region.Framework.Interfaces;
 using OpenSim.Region.Framework.Scenes;
 using OpenSim.Region.Physics.Manager;
@@ -77,6 +78,31 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         /// </remarks>
         public bool DisableInterRegionTeleportCancellation { get; set; }
 
+        /// <summary>
+        /// Number of times inter-region teleport was attempted.
+        /// </summary>
+        private Stat m_interRegionTeleportAttempts;
+
+        /// <summary>
+        /// Number of times inter-region teleport was aborted (due to simultaneous client logout).
+        /// </summary>
+        private Stat m_interRegionTeleportAborts;
+
+        /// <summary>
+        /// Number of times inter-region teleport was successfully cancelled by the client.
+        /// </summary>
+        private Stat m_interRegionTeleportCancels;
+
+        /// <summary>
+        /// Number of times inter-region teleport failed due to server/client/network problems (e.g. viewer failed to
+        /// connect with destination region).
+        /// </summary>
+        /// <remarks>
+        /// This is not necessarily a problem for this simulator - in open-grid/hg conditions, viewer connectivity to
+        /// destination simulator is unknown.
+        /// </remarks>
+        private Stat m_interRegionTeleportFailures;
+
         protected bool m_Enabled = false;
 
         public Scene Scene { get; private set; }
@@ -156,6 +182,60 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
 
             Scene = scene;
 
+            m_interRegionTeleportAttempts = 
+                new Stat(
+                    "InterRegionTeleportAttempts",
+                    "Number of inter-region teleports attempted.",
+                    "This does not count attempts which failed due to pre-conditions (e.g. target simulator refused access).\n"
+                        + "You can get successfully teleports by subtracting aborts, cancels and teleport failures from this figure.",
+                    "",
+                    "entitytransfer",
+                    Scene.Name,
+                    StatType.Push,
+                    null,
+                    StatVerbosity.Debug);
+
+            m_interRegionTeleportAborts = 
+                new Stat(
+                    "InterRegionTeleportAborts",
+                    "Number of inter-region teleports aborted due to client actions.",
+                    "The chief action is simultaneous logout whilst teleporting.",
+                    "",
+                    "entitytransfer",
+                    Scene.Name,
+                    StatType.Push,
+                    null,
+                    StatVerbosity.Debug);
+
+            m_interRegionTeleportCancels = 
+                new Stat(
+                    "InterRegionTeleportCancels",
+                    "Number of inter-region teleports cancelled by the client.",
+                    null,
+                    "",
+                    "entitytransfer",
+                    Scene.Name,
+                    StatType.Push,
+                    null,
+                    StatVerbosity.Debug);
+
+            m_interRegionTeleportFailures = 
+                new Stat(
+                    "InterRegionTeleportFailures",
+                    "Number of inter-region teleports that failed due to server/client/network issues.",
+                    "This number may not be very helpful in open-grid/hg situations as the network connectivity/quality of destinations is uncontrollable.",
+                    "",
+                    "entitytransfer",
+                    Scene.Name,
+                    StatType.Push,
+                    null,
+                    StatVerbosity.Debug);
+
+            StatsManager.RegisterStat(m_interRegionTeleportAttempts);
+            StatsManager.RegisterStat(m_interRegionTeleportAborts);
+            StatsManager.RegisterStat(m_interRegionTeleportCancels);
+            StatsManager.RegisterStat(m_interRegionTeleportFailures);
+
             scene.RegisterModuleInterface<IEntityTransferModule>(this);
             scene.EventManager.OnNewClient += OnNewClient;
         }
@@ -173,7 +253,13 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
 
         public virtual void Close() {}
 
-        public virtual void RemoveRegion(Scene scene) {}
+        public virtual void RemoveRegion(Scene scene) 
+        {
+            StatsManager.DeregisterStat(m_interRegionTeleportAttempts);
+            StatsManager.DeregisterStat(m_interRegionTeleportAborts);
+            StatsManager.DeregisterStat(m_interRegionTeleportCancels);
+            StatsManager.DeregisterStat(m_interRegionTeleportFailures);
+        }
 
         public virtual void RegionLoaded(Scene scene)
         {
@@ -548,6 +634,11 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                 return;
             }
 
+            // Before this point, teleport 'failure' is due to checkable pre-conditions such as whether the target
+            // simulator can be found and is explicitly prepared to allow access.  Therefore, we will not count these
+            // as server attempts.
+            m_interRegionTeleportAttempts.Value++;
+
             m_log.DebugFormat("[ENTITY TRANSFER MODULE]: Destination is running version {0}", version);
 
             // Fixing a bug where teleporting while sitting results in the avatar ending up removed from
@@ -600,6 +691,8 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             bool logout = false;
             if (!CreateAgent(sp, reg, finalDestination, agentCircuit, teleportFlags, out reason, out logout))
             {
+                m_interRegionTeleportFailures.Value++;
+
                 sp.ControllingClient.SendTeleportFailed(String.Format("Teleport refused: {0}", reason));
 
                 m_log.DebugFormat(
@@ -611,6 +704,8 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
 
             if (m_entityTransferStateMachine.GetAgentTransferState(sp.UUID) == AgentTransferState.Cancelling)
             {
+                m_interRegionTeleportCancels.Value++;
+
                 m_log.DebugFormat(
                     "[ENTITY TRANSFER MODULE]: Cancelled teleport of {0} to {1} from {2} after CreateAgent on client request", 
                     sp.Name, finalDestination.RegionName, sp.Scene.Name);
@@ -619,6 +714,8 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             }
             else if (m_entityTransferStateMachine.GetAgentTransferState(sp.UUID) == AgentTransferState.Aborting)
             {
+                m_interRegionTeleportAborts.Value++;
+
                 m_log.DebugFormat(
                     "[ENTITY TRANSFER MODULE]: Aborted teleport of {0} to {1} from {2} after CreateAgent due to previous client close.",
                     sp.Name, finalDestination.RegionName, sp.Scene.Name);
@@ -688,6 +785,8 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             // establish th econnection to the destination which makes it return true.
             if (m_entityTransferStateMachine.GetAgentTransferState(sp.UUID) == AgentTransferState.Aborting)
             {
+                m_interRegionTeleportAborts.Value++;
+
                 m_log.DebugFormat(
                     "[ENTITY TRANSFER MODULE]: Aborted teleport of {0} to {1} from {2} before UpdateAgent",
                     sp.Name, finalDestination.RegionName, sp.Scene.Name);
@@ -703,6 +802,8 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             {
                 if (m_entityTransferStateMachine.GetAgentTransferState(sp.UUID) == AgentTransferState.Aborting)
                 {
+                    m_interRegionTeleportAborts.Value++;
+
                     m_log.DebugFormat(
                         "[ENTITY TRANSFER MODULE]: Aborted teleport of {0} to {1} from {2} after UpdateAgent due to previous client close.",
                         sp.Name, finalDestination.RegionName, sp.Scene.Name);
@@ -720,6 +821,8 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
 
             if (m_entityTransferStateMachine.GetAgentTransferState(sp.UUID) == AgentTransferState.Cancelling)
             {
+                m_interRegionTeleportCancels.Value++;
+
                 m_log.DebugFormat(
                     "[ENTITY TRANSFER MODULE]: Cancelled teleport of {0} to {1} from {2} after UpdateAgent on client request", 
                     sp.Name, finalDestination.RegionName, sp.Scene.Name);
@@ -755,6 +858,8 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             {
                 if (m_entityTransferStateMachine.GetAgentTransferState(sp.UUID) == AgentTransferState.Aborting)
                 {
+                    m_interRegionTeleportAborts.Value++;
+
                     m_log.DebugFormat(
                         "[ENTITY TRANSFER MODULE]: Aborted teleport of {0} to {1} from {2} after WaitForAgentArrivedAtDestination due to previous client close.",
                         sp.Name, finalDestination.RegionName, sp.Scene.Name);
@@ -767,6 +872,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                     sp.Name, finalDestination.RegionName, sp.Scene.RegionInfo.RegionName);
                 
                 Fail(sp, finalDestination, logout, "Destination region did not signal teleport completion.");
+
                 return;
             }
 
@@ -808,15 +914,6 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                 // now we have a child agent in this region. 
                 sp.Reset();
             }
-
-            // Commented pending deletion since this method no longer appears to do anything at all
-//            // REFACTORING PROBLEM. Well, not a problem, but this method is HORRIBLE!
-//            if (sp.Scene.NeedSceneCacheClear(sp.UUID))
-//            {
-//                m_log.DebugFormat(
-//                    "[ENTITY TRANSFER MODULE]: User {0} is going to another region, profile cache removed",
-//                    sp.UUID);
-//            }
         }
 
         /// <summary>
@@ -852,6 +949,8 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         {
             CleanupFailedInterRegionTeleport(sp, finalDestination);
 
+            m_interRegionTeleportFailures.Value++;
+
             sp.ControllingClient.SendTeleportFailed(
                 string.Format(
                     "Problems connecting to destination {0}, reason: {1}", finalDestination.RegionName, reason));
@@ -1011,6 +1110,10 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         {
             version = String.Empty;
             newpos = new Vector3(pos.X, pos.Y, pos.Z);
+
+//            m_log.DebugFormat(
+//                "[ENTITY TRANSFER MODULE]: Crossing agent {0} at pos {1} in {2}", agent.Name, pos, scene.Name);
+
             uint neighbourx = scene.RegionInfo.RegionLocX;
             uint neighboury = scene.RegionInfo.RegionLocY;
             const float boundaryDistance = 1.7f;
diff --git a/OpenSim/Region/Framework/Scenes/Border.cs b/OpenSim/Region/Framework/Scenes/Border.cs
index c6a6511..08c0c31 100644
--- a/OpenSim/Region/Framework/Scenes/Border.cs
+++ b/OpenSim/Region/Framework/Scenes/Border.cs
@@ -33,8 +33,7 @@ using OpenMetaverse;
 namespace OpenSim.Region.Framework.Scenes
 {
     public class Border
-    {
-        
+    {       
         /// <summary>
         /// Line perpendicular to the Direction Cardinal.  Z value is the 
         /// </summary>
@@ -81,6 +80,10 @@ namespace OpenSim.Region.Framework.Scenes
             TriggerRegionY = triggerRegionY;
         }
 
+        /// <summary>
+        /// Tests to see if the given position would cross this border.
+        /// </summary>
+        /// <returns></returns>
         public bool TestCross(Vector3 position)
         {
             bool result = false;
diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index 357a94b..fd20c60 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -2644,7 +2644,6 @@ namespace OpenSim.Region.Framework.Scenes
 
                 }
             }
-            
 
             return null;
         }
diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index 5ed7b67..322afd2 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -456,9 +456,9 @@ namespace OpenSim.Region.Framework.Scenes
                 {
                     m_pos = PhysicsActor.Position;
 
-                    //m_log.DebugFormat(
-                    //    "[SCENE PRESENCE]: Set position {0} for {1} in {2} via getting AbsolutePosition!",
-                    //    m_pos, Name, Scene.RegionInfo.RegionName);
+//                    m_log.DebugFormat(
+//                        "[SCENE PRESENCE]: Set position of {0} in {1} to {2} via getting AbsolutePosition!",
+//                        Name, Scene.Name, m_pos);
                 }
                 else
                 {
@@ -485,6 +485,9 @@ namespace OpenSim.Region.Framework.Scenes
             }
             set
             {
+//                m_log.DebugFormat("[SCENE PRESENCE]: Setting position of {0} in {1} to {2}", Name, Scene.Name, value);
+//                Util.PrintCallStack();
+
                 if (PhysicsActor != null)
                 {
                     try
@@ -1065,6 +1068,13 @@ namespace OpenSim.Region.Framework.Scenes
                 else
                     AddToPhysicalScene(isFlying);
 
+                // XXX: This is to trigger any secondary teleport needed for a megaregion when the user has teleported to a 
+                // location outside the 'root region' (the south-west 256x256 corner).  This is the earlist we can do it
+                // since it requires a physics actor to be present.  If it is left any later, then physics appears to reset
+                // the value to a negative position which does not trigger the border cross.
+                // This may not be the best location for this.
+                CheckForBorderCrossing();
+
                 if (ForceFly)
                 {
                     Flying = true;
@@ -3121,6 +3131,10 @@ namespace OpenSim.Region.Framework.Scenes
 
                 if (!IsInTransit)
                 {
+//                    m_log.DebugFormat(
+//                        "[SCENE PRESENCE]: Testing border check for projected position {0} of {1} in {2}", 
+//                        pos2, Name, Scene.Name);
+
                     // Checks if where it's headed exists a region
                     bool needsTransit = false;
                     if (m_scene.TestBorderCross(pos2, Cardinals.W))
diff --git a/OpenSim/Region/OptionalModules/World/SceneCommands/SceneCommandsModule.cs b/OpenSim/Region/OptionalModules/World/SceneCommands/SceneCommandsModule.cs
index 5fb74b0..29b39e0 100644
--- a/OpenSim/Region/OptionalModules/World/SceneCommands/SceneCommandsModule.cs
+++ b/OpenSim/Region/OptionalModules/World/SceneCommands/SceneCommandsModule.cs
@@ -116,6 +116,37 @@ namespace OpenSim.Region.OptionalModules.Avatar.Attachments
                     + "If teleport   is true  then some extra teleport debug information is logged.\n"
                     + "If updates    is true  then any frame which exceeds double the maximum desired frame time is logged.",
                 HandleDebugSceneSetCommand);
+
+            scene.AddCommand(
+                "Regions", 
+                this, "show borders", "show borders", "Show border information for regions", HandleShowBordersCommand);
+        }
+
+        private void HandleShowBordersCommand(string module, string[] args)
+        {
+            StringBuilder sb = new StringBuilder();
+            sb.AppendFormat("Borders for {0}:\n", m_scene.Name);
+
+            ConsoleDisplayTable cdt = new ConsoleDisplayTable();
+            cdt.AddColumn("Cross Direction", 15);
+            cdt.AddColumn("Line", 34);
+            cdt.AddColumn("Trigger Region", 14);
+
+            foreach (Border b in m_scene.NorthBorders)
+                cdt.AddRow(b.CrossDirection, b.BorderLine, string.Format("{0}, {1}", b.TriggerRegionX, b.TriggerRegionY));
+
+            foreach (Border b in m_scene.EastBorders)
+                cdt.AddRow(b.CrossDirection, b.BorderLine, string.Format("{0}, {1}", b.TriggerRegionX, b.TriggerRegionY));
+
+            foreach (Border b in m_scene.SouthBorders)
+                cdt.AddRow(b.CrossDirection, b.BorderLine, string.Format("{0}, {1}", b.TriggerRegionX, b.TriggerRegionY));
+
+            foreach (Border b in m_scene.WestBorders)
+                cdt.AddRow(b.CrossDirection, b.BorderLine, string.Format("{0}, {1}", b.TriggerRegionX, b.TriggerRegionY));
+
+            cdt.AddToStringBuilder(sb);
+
+            MainConsole.Instance.Output(sb.ToString());
         }
 
         private void HandleDebugSceneGetCommand(string module, string[] args)
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs b/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
index 5549984..65df741 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
@@ -321,7 +321,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
             }
         }
 
-        internal void ProcessTypeChange(Vehicle pType)
+        public void ProcessTypeChange(Vehicle pType)
         {
             VDetailLog("{0},ProcessTypeChange,type={1}", Prim.LocalID, pType);
             // Set Defaults For Type
@@ -1301,14 +1301,52 @@ namespace OpenSim.Region.Physics.BulletSPlugin
         //      efficiency of 1.0 will cause the spring to reach its equilibrium with exponential decay.
         public void ComputeAngularVerticalAttraction()
         {
+
             // If vertical attaction timescale is reasonable
             if (enableAngularVerticalAttraction && m_verticalAttractionTimescale < m_verticalAttractionCutoff)
             {
+                // Possible solution derived from a discussion at:
+                // http://stackoverflow.com/questions/14939657/computing-vector-from-quaternion-works-computing-quaternion-from-vector-does-no
+
+                // Create a rotation that is only the vehicle's rotation around Z
+                Vector3 currentEuler = Vector3.Zero;
+                VehicleOrientation.GetEulerAngles(out currentEuler.X, out currentEuler.Y, out currentEuler.Z);
+                Quaternion justZOrientation = Quaternion.CreateFromAxisAngle(Vector3.UnitZ, currentEuler.Z);
+
+                // Create the axis that is perpendicular to the up vector and the rotated up vector.
+                Vector3 differenceAxis = Vector3.Cross(Vector3.UnitZ * justZOrientation, Vector3.UnitZ * VehicleOrientation);
+                // Compute the angle between those to vectors.
+                double differenceAngle = Math.Acos((double)Vector3.Dot(Vector3.UnitZ, Vector3.Normalize(Vector3.UnitZ * VehicleOrientation)));
+                // 'differenceAngle' is the angle to rotate and 'differenceAxis' is the plane to rotate in to get the vehicle vertical
+
+                // Reduce the change by the time period it is to change in. Timestep is handled when velocity is applied.
+                // TODO: add 'efficiency'.
+                differenceAngle /= m_verticalAttractionTimescale;
+
+                // Create the quaterian representing the correction angle
+                Quaternion correctionRotation = Quaternion.CreateFromAxisAngle(differenceAxis, (float)differenceAngle);
+
+                // Turn that quaternion into Euler values to make it into velocities to apply.
+                Vector3 vertContributionV = Vector3.Zero;
+                correctionRotation.GetEulerAngles(out vertContributionV.X, out vertContributionV.Y, out vertContributionV.Z);
+                vertContributionV *= -1f;
+
+                VehicleRotationalVelocity += vertContributionV;
+
+                VDetailLog("{0},  MoveAngular,verticalAttraction,diffAxis={1},diffAng={2},corrRot={3},contrib={4}",
+                                Prim.LocalID,
+                                differenceAxis,
+                                differenceAngle,
+                                correctionRotation,
+                                vertContributionV);
+
+                // ===================================================================
+                /*
                 Vector3 vertContributionV = Vector3.Zero;
                 Vector3 origRotVelW = VehicleRotationalVelocity;        // DEBUG DEBUG
 
                 // Take a vector pointing up and convert it from world to vehicle relative coords.
-                Vector3 verticalError = Vector3.UnitZ * VehicleOrientation;
+                Vector3 verticalError = Vector3.Normalize(Vector3.UnitZ * VehicleOrientation);
 
                 // If vertical attraction correction is needed, the vector that was pointing up (UnitZ)
                 //    is now:
@@ -1334,13 +1372,17 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                 // 'vertContrbution' is now the necessary angular correction to correct tilt in one second.
                 //     Correction happens over a number of seconds.
                 Vector3 unscaledContribVerticalErrorV = vertContributionV;     // DEBUG DEBUG
+
+                // The correction happens over the user's time period
                 vertContributionV /= m_verticalAttractionTimescale;
 
-                VehicleRotationalVelocity += vertContributionV;
+                // Rotate the vehicle rotation to the world coordinates.
+                VehicleRotationalVelocity += (vertContributionV * VehicleOrientation);
 
                 VDetailLog("{0},  MoveAngular,verticalAttraction,,origRotVW={1},vertError={2},unscaledV={3},eff={4},ts={5},vertContribV={6}",
                                 Prim.LocalID, origRotVelW, verticalError, unscaledContribVerticalErrorV, 
                                 m_verticalAttractionEfficiency, m_verticalAttractionTimescale, vertContributionV);
+                */
             }
         }
 
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs b/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs
index 4d89a88..f3454c8 100755
--- a/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs
@@ -142,6 +142,14 @@ public static class BSParam
     public static float VehicleAngularBankingTimescaleFudge { get; private set; }
     public static bool VehicleDebuggingEnabled { get; private set; }
 
+    // Convex Hulls
+    public static int CSHullMaxDepthSplit { get; private set; }
+    public static int CSHullMaxDepthSplitForSimpleShapes { get; private set; }
+    public static float CSHullConcavityThresholdPercent { get; private set; }
+    public static float CSHullVolumeConservationThresholdPercent { get; private set; }
+    public static int CSHullMaxVertices { get; private set; }
+    public static float CSHullMaxSkinWidth { get; private set; }
+
     // Linkset implementation parameters
     public static float LinksetImplementation { get; private set; }
     public static bool LinkConstraintUseFrameOffset { get; private set; }
@@ -195,10 +203,10 @@ public static class BSParam
     public delegate void PSetOnObject<T>(BSScene scene, BSPhysObject obj);
     public sealed class ParameterDefn<T> : ParameterDefnBase
     {
-        T defaultValue;
-        PSetValue<T> setter;
-        PGetValue<T> getter;
-        PSetOnObject<T> objectSet;
+        private T defaultValue;
+        private PSetValue<T> setter;
+        private PGetValue<T> getter;
+        private PSetOnObject<T> objectSet;
         public ParameterDefn(string pName, string pDesc, T pDefault, PGetValue<T> pGetter, PSetValue<T> pSetter)
             : base(pName, pDesc)
         {
@@ -215,13 +223,23 @@ public static class BSParam
             getter = pGetter;
             objectSet = pObjSetter;
         }
+        /* Wish I could simplify using this definition but CLR doesn't store references so closure around delegates of references won't work
+        public ParameterDefn(string pName, string pDesc, T pDefault, ref T loc)
+            : base(pName, pDesc)
+        {
+            defaultValue = pDefault;
+            setter = (s, v) => { loc = v; };
+            getter = (s) => { return loc; };
+            objectSet = null;
+        }
+         */
         public override void AssignDefault(BSScene s)
         {
             setter(s, defaultValue);
         }
         public override string GetValue(BSScene s)
         {
-            return String.Format("{0}", getter(s));
+            return getter(s).ToString();
         }
         public override void SetValue(BSScene s, string valAsString)
         {
@@ -244,6 +262,7 @@ public static class BSParam
                 try
                 {
                     T setValue = (T)parser.Invoke(genericType, new Object[] { valAsString });
+                    // Store the parsed value
                     setter(s, setValue);
                     // s.Logger.DebugFormat("{0} Parameter {1} = {2}", LogHeader, name, setValue);
                 }
@@ -623,6 +642,31 @@ public static class BSParam
             (s) => { return GlobalContactBreakingThreshold; },
             (s,v) => { GlobalContactBreakingThreshold = v; s.UnmanagedParams[0].globalContactBreakingThreshold = v; } ),
 
+            new ParameterDefn<int>("CSHullMaxDepthSplit", "CS impl: max depth to split for hull. 1-10 but > 7 is iffy",
+            7,
+            (s) => { return CSHullMaxDepthSplit; },
+            (s,v) => { CSHullMaxDepthSplit = v; } ),
+            new ParameterDefn<int>("CSHullMaxDepthSplitForSimpleShapes", "CS impl: max depth setting for simple prim shapes",
+            2,
+            (s) => { return CSHullMaxDepthSplitForSimpleShapes; },
+            (s,v) => { CSHullMaxDepthSplitForSimpleShapes = v; } ),
+            new ParameterDefn<float>("CSHullConcavityThresholdPercent", "CS impl: concavity threshold percent (0-20)",
+            5f,
+            (s) => { return CSHullConcavityThresholdPercent; },
+            (s,v) => { CSHullConcavityThresholdPercent = v; } ),
+            new ParameterDefn<float>("CSHullVolumeConservationThresholdPercent", "percent volume conservation to collapse hulls (0-30)",
+            5f,
+            (s) => { return CSHullVolumeConservationThresholdPercent; },
+            (s,v) => { CSHullVolumeConservationThresholdPercent = v; } ),
+            new ParameterDefn<int>("CSHullMaxVertices", "CS impl: maximum number of vertices in output hulls. Keep < 50.",
+            32,
+            (s) => { return CSHullMaxVertices; },
+            (s,v) => { CSHullMaxVertices = v; } ),
+            new ParameterDefn<float>("CSHullMaxSkinWidth", "CS impl: skin width to apply to output hulls.",
+            0,
+            (s) => { return CSHullMaxSkinWidth; },
+            (s,v) => { CSHullMaxSkinWidth = v; } ),
+
             new ParameterDefn<float>("LinksetImplementation", "Type of linkset implementation (0=Constraint, 1=Compound, 2=Manual)",
             (float)BSLinkset.LinksetImplementation.Compound,
             (s) => { return LinksetImplementation; },
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSPhysObject.cs b/OpenSim/Region/Physics/BulletSPlugin/BSPhysObject.cs
index f953c1e..6bb88c7 100755
--- a/OpenSim/Region/Physics/BulletSPlugin/BSPhysObject.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSPhysObject.cs
@@ -86,7 +86,7 @@ public abstract class BSPhysObject : PhysicsActor
         PhysBody = new BulletBody(localID);
         PhysShape = new BulletShape();
 
-        LastAssetBuildFailed = false;
+        PrimAssetState = PrimAssetCondition.Unknown;
 
         // Default material type. Also sets Friction, Restitution and Density.
         SetMaterial((int)MaterialAttributes.Material.Wood);
@@ -133,9 +133,13 @@ public abstract class BSPhysObject : PhysicsActor
     // Reference to the physical shape (btCollisionShape) of this object
     public BulletShape PhysShape;
 
-    // 'true' if the mesh's underlying asset failed to build.
-    // This will keep us from looping after the first time the build failed.
-    public bool LastAssetBuildFailed { get; set; }
+    // The physical representation of the prim might require an asset fetch.
+    // The asset state is first 'Unknown' then 'Waiting' then either 'Failed' or 'Fetched'.
+    public enum PrimAssetCondition
+    {
+        Unknown, Waiting, Failed, Fetched
+    }
+    public PrimAssetCondition PrimAssetState { get; set; }
 
     // The objects base shape information. Null if not a prim type shape.
     public PrimitiveBaseShape BaseShape { get; protected set; }
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs b/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
index 2cbbe9a..6a5461a 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
@@ -155,7 +155,7 @@ public class BSPrim : BSPhysObject
     public override PrimitiveBaseShape Shape {
         set {
             BaseShape = value;
-            LastAssetBuildFailed = false;
+            PrimAssetState = PrimAssetCondition.Unknown;
             ForceBodyShapeRebuild(false);
         }
     }
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSShapeCollection.cs b/OpenSim/Region/Physics/BulletSPlugin/BSShapeCollection.cs
index 05c147d..7609578 100755
--- a/OpenSim/Region/Physics/BulletSPlugin/BSShapeCollection.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSShapeCollection.cs
@@ -447,17 +447,10 @@ public sealed class BSShapeCollection : IDisposable
 
         // If the prim attributes are simple, this could be a simple Bullet native shape
         if (!haveShape
+                && nativeShapePossible
                 && pbs != null
                 && !pbs.SculptEntry
-                && nativeShapePossible
-                && ((pbs.SculptEntry && !BSParam.ShouldMeshSculptedPrim)
-                    || (pbs.ProfileBegin == 0 && pbs.ProfileEnd == 0
-                        && pbs.ProfileHollow == 0
-                        && pbs.PathTwist == 0 && pbs.PathTwistBegin == 0
-                        && pbs.PathBegin == 0 && pbs.PathEnd == 0
-                        && pbs.PathTaperX == 0 && pbs.PathTaperY == 0
-                        && pbs.PathScaleX == 100 && pbs.PathScaleY == 100
-                        && pbs.PathShearX == 0 && pbs.PathShearY == 0) ) )
+                && ((pbs.SculptEntry && !BSParam.ShouldMeshSculptedPrim) || PrimHasNoCuts(pbs)) )
         {
             // Get the scale of any existing shape so we can see if the new shape is same native type and same size.
             OMV.Vector3 scaleOfExistingShape = OMV.Vector3.Zero;
@@ -508,6 +501,18 @@ public sealed class BSShapeCollection : IDisposable
         return ret;
     }
 
+    // return 'true' if this shape description does not include any cutting or twisting.
+    private bool PrimHasNoCuts(PrimitiveBaseShape pbs)
+    {
+        return pbs.ProfileBegin == 0 && pbs.ProfileEnd == 0
+            && pbs.ProfileHollow == 0
+            && pbs.PathTwist == 0 && pbs.PathTwistBegin == 0
+            && pbs.PathBegin == 0 && pbs.PathEnd == 0
+            && pbs.PathTaperX == 0 && pbs.PathTaperY == 0
+            && pbs.PathScaleX == 100 && pbs.PathScaleY == 100
+            && pbs.PathShearX == 0 && pbs.PathShearY == 0;
+    }
+
     // return 'true' if the prim's shape was changed.
     public bool CreateGeomMeshOrHull(BSPhysObject prim, ShapeDestructionCallback shapeCallback)
     {
@@ -518,7 +523,7 @@ public sealed class BSShapeCollection : IDisposable
         if (prim.IsPhysical && BSParam.ShouldUseHullsForPhysicalObjects)
         {
             // Update prim.BSShape to reference a hull of this shape.
-            ret = GetReferenceToHull(prim,shapeCallback);
+            ret = GetReferenceToHull(prim, shapeCallback);
             if (DDetail) DetailLog("{0},BSShapeCollection.CreateGeom,hull,shape={1},key={2}",
                                     prim.LocalID, prim.PhysShape, prim.PhysShape.shapeKey.ToString("X"));
         }
@@ -699,6 +704,7 @@ public sealed class BSShapeCollection : IDisposable
 
     // See that hull shape exists in the physical world and update prim.BSShape.
     // We could be creating the hull because scale changed or whatever.
+    // Return 'true' if a new hull was built. Otherwise, returning a shared hull instance.
     private bool GetReferenceToHull(BSPhysObject prim, ShapeDestructionCallback shapeCallback)
     {
         BulletShape newShape;
@@ -717,6 +723,7 @@ public sealed class BSShapeCollection : IDisposable
         DereferenceShape(prim.PhysShape, shapeCallback);
 
         newShape = CreatePhysicalHull(prim.PhysObjectName, newHullKey, prim.BaseShape, prim.Size, lod);
+        // It might not have been created if we're waiting for an asset.
         newShape = VerifyMeshCreated(newShape, prim);
 
         ReferenceShape(newShape);
@@ -735,13 +742,13 @@ public sealed class BSShapeCollection : IDisposable
         HullDesc hullDesc;
         if (Hulls.TryGetValue(newHullKey, out hullDesc))
         {
-            // If the hull shape already is created, just use it.
+            // If the hull shape already has been created, just use the one shared instance.
             newShape = hullDesc.shape.Clone();
         }
         else
         {
-            // Build a new hull in the physical world
-            // Pass true for physicalness as this creates some sort of bounding box which we don't need
+            // Build a new hull in the physical world.
+            // Pass true for physicalness as this prevents the creation of bounding box which is not needed
             IMesh meshData = PhysicsScene.mesher.CreateMesh(objName, pbs, size, lod, true, false, false, false);
             if (meshData != null)
             {
@@ -761,15 +768,35 @@ public sealed class BSShapeCollection : IDisposable
                     convVertices.Add(new float3(vv.X, vv.Y, vv.Z));
                 }
 
+                uint maxDepthSplit = (uint)BSParam.CSHullMaxDepthSplit;
+                if (BSParam.CSHullMaxDepthSplit != BSParam.CSHullMaxDepthSplitForSimpleShapes)
+                {
+                    // Simple primitive shapes we know are convex so they are better implemented with
+                    //    fewer hulls.
+                    // Check for simple shape (prim without cuts) and reduce split parameter if so.
+                    if (PrimHasNoCuts(pbs))
+                    {
+                        maxDepthSplit = (uint)BSParam.CSHullMaxDepthSplitForSimpleShapes;
+                    }
+                }
+
                 // setup and do convex hull conversion
                 m_hulls = new List<ConvexResult>();
                 DecompDesc dcomp = new DecompDesc();
                 dcomp.mIndices = convIndices;
                 dcomp.mVertices = convVertices;
+                dcomp.mDepth = maxDepthSplit;
+                dcomp.mCpercent = BSParam.CSHullConcavityThresholdPercent;
+                dcomp.mPpercent = BSParam.CSHullVolumeConservationThresholdPercent;
+                dcomp.mMaxVertices = (uint)BSParam.CSHullMaxVertices;
+                dcomp.mSkinWidth = BSParam.CSHullMaxSkinWidth;
                 ConvexBuilder convexBuilder = new ConvexBuilder(HullReturn);
                 // create the hull into the _hulls variable
                 convexBuilder.process(dcomp);
 
+                DetailLog("{0},BSShapeCollection.CreatePhysicalHull,key={1},inVert={2},inInd={3},split={4},hulls={5}",
+                                    BSScene.DetailLogZero, newHullKey, indices.GetLength(0), vertices.Count, maxDepthSplit, m_hulls.Count);
+
                 // Convert the vertices and indices for passing to unmanaged.
                 // The hull information is passed as a large floating point array.
                 // The format is:
@@ -905,11 +932,15 @@ public sealed class BSShapeCollection : IDisposable
             return newShape;
 
         // If this mesh has an underlying asset and we have not failed getting it before, fetch the asset
-        if (prim.BaseShape.SculptEntry && !prim.LastAssetBuildFailed && prim.BaseShape.SculptTexture != OMV.UUID.Zero)
+        if (prim.BaseShape.SculptEntry 
+            && prim.PrimAssetState != BSPhysObject.PrimAssetCondition.Failed
+            && prim.PrimAssetState != BSPhysObject.PrimAssetCondition.Waiting
+            && prim.BaseShape.SculptTexture != OMV.UUID.Zero
+            )
         {
-            DetailLog("{0},BSShapeCollection.VerifyMeshCreated,fetchAsset,lastFailed={1}", prim.LocalID, prim.LastAssetBuildFailed);
-            // This will prevent looping through this code as we keep trying to get the failed shape
-            prim.LastAssetBuildFailed = true;
+            DetailLog("{0},BSShapeCollection.VerifyMeshCreated,fetchAsset", prim.LocalID);
+            // Multiple requestors will know we're waiting for this asset
+            prim.PrimAssetState = BSPhysObject.PrimAssetCondition.Waiting;
 
             BSPhysObject xprim = prim;
             Util.FireAndForget(delegate
@@ -920,7 +951,7 @@ public sealed class BSShapeCollection : IDisposable
                         BSPhysObject yprim = xprim; // probably not necessary, but, just in case.
                         assetProvider(yprim.BaseShape.SculptTexture, delegate(AssetBase asset)
                         {
-                            bool assetFound = false;            // DEBUG DEBUG
+                            bool assetFound = false;
                             string mismatchIDs = String.Empty;  // DEBUG DEBUG
                             if (asset != null && yprim.BaseShape.SculptEntry)
                             {
@@ -938,6 +969,10 @@ public sealed class BSShapeCollection : IDisposable
                                     mismatchIDs = yprim.BaseShape.SculptTexture.ToString() + "/" + asset.ID;
                                 }
                             }
+                            if (assetFound)
+                                yprim.PrimAssetState = BSPhysObject.PrimAssetCondition.Fetched;
+                            else
+                                yprim.PrimAssetState = BSPhysObject.PrimAssetCondition.Failed;
                             DetailLog("{0},BSShapeCollection,fetchAssetCallback,found={1},isSculpt={2},ids={3}",
                                         yprim.LocalID, assetFound, yprim.BaseShape.SculptEntry, mismatchIDs );
 
@@ -945,6 +980,7 @@ public sealed class BSShapeCollection : IDisposable
                     }
                     else
                     {
+                        xprim.PrimAssetState = BSPhysObject.PrimAssetCondition.Failed;
                         PhysicsScene.Logger.ErrorFormat("{0} Physical object requires asset but no asset provider. Name={1}",
                                                     LogHeader, PhysicsScene.Name);
                     }
@@ -952,7 +988,7 @@ public sealed class BSShapeCollection : IDisposable
         }
         else
         {
-            if (prim.LastAssetBuildFailed)
+            if (prim.PrimAssetState == BSPhysObject.PrimAssetCondition.Failed)
             {
                 PhysicsScene.Logger.ErrorFormat("{0} Mesh failed to fetch asset. lID={1}, texture={2}",
                                             LogHeader, prim.LocalID, prim.BaseShape.SculptTexture);
diff --git a/OpenSim/Region/RegionCombinerModule/RegionCombinerModule.cs b/OpenSim/Region/RegionCombinerModule/RegionCombinerModule.cs
index 905540d..7127c73 100644
--- a/OpenSim/Region/RegionCombinerModule/RegionCombinerModule.cs
+++ b/OpenSim/Region/RegionCombinerModule/RegionCombinerModule.cs
@@ -415,18 +415,17 @@ namespace OpenSim.Region.RegionCombinerModule
                         */
                     #endregion
 
-                    // If we're one region over +x y
+                    // If we're one region over +x y (i.e. root region is to the west)
                     //xxx
                     //xxy
                     //xxx
-
                     if (rootConn.PosX + rootConn.XEnd >= newConn.PosX && rootConn.PosY >= newConn.PosY)
                     {
                         connectedYN = DoWorkForOneRegionOverPlusXY(rootConn, newConn, scene);
                         break;
                     }
 
-                    // If we're one region over x +y
+                    // If we're one region over x +y (i.e. root region is to the south)
                     //xyx
                     //xxx
                     //xxx
@@ -436,7 +435,7 @@ namespace OpenSim.Region.RegionCombinerModule
                         break;
                     }
 
-                    // If we're one region over +x +y
+                    // If we're one region over +x +y (i.e. root region is to the south-west)
                     //xxy
                     //xxx
                     //xxx
@@ -646,7 +645,6 @@ namespace OpenSim.Region.RegionCombinerModule
             {
                 if (rootConn.RegionScene.EastBorders.Count == 1)// && conn.RegionScene.EastBorders.Count == 2)
                 {
-
                     rootConn.RegionScene.EastBorders[0].BorderLine.Z += (int)Constants.RegionSize;
 
                     lock (rootConn.RegionScene.NorthBorders)