7 files changed, 370 insertions, 138 deletions

diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLUDPClient.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLUDPClient.cs
index ae72175..c472176 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLUDPClient.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLUDPClient.cs
@@ -279,7 +279,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         public string GetStats()
         {
             return string.Format(
-                "{0,7} {1,7} {2,7} {3,9} {4,7} {5,7} {6,7} {7,7} {8,7} {9,8} {10,7} {11,7}",
+                "{0,7} {1,7} {2,7} {3,9} {4,7} {5,7} {6,7} {7,7} {8,7} {9,8} {10,7} {11,7} {12,7}",
+                Util.EnvironmentTickCountSubtract(TickLastPacketReceived),
                 PacketsReceived,                                 
                 PacketsSent,
                 PacketsResent,
diff --git a/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs b/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
index cd1e1c1..273e290 100644
--- a/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
@@ -47,6 +47,7 @@ using OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation;
 using OpenSim.Region.CoreModules.World.Serialiser;
 using OpenSim.Region.Framework.Scenes;
 using OpenSim.Region.Framework.Interfaces;
+using OpenSim.Region.ScriptEngine.Interfaces;
 using OpenSim.Region.ScriptEngine.XEngine;
 using OpenSim.Services.Interfaces;
 using OpenSim.Tests.Common;
@@ -289,21 +290,37 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
         {
             TestHelpers.InMethod();
 
-            Scene scene = CreateTestScene();
+            Scene scene = CreateScriptingEnabledTestScene();
             UserAccount ua1 = UserAccountHelpers.CreateUserWithInventory(scene, 0x1);
-            ScenePresence sp = SceneHelpers.AddScenePresence(scene, ua1.PrincipalID);
+            ScenePresence sp = SceneHelpers.AddScenePresence(scene, ua1);
 
             SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, sp.UUID, "att-name", 0x10);
-            TaskInventoryHelpers.AddScript(scene, so.RootPart);
+            TaskInventoryItem scriptItem
+                = TaskInventoryHelpers.AddScript(
+                    scene,
+                    so.RootPart,
+                    "scriptItem",
+                    "default { attach(key id) { if (id != NULL_KEY) { llSay(0, \"Hello World\"); } } }");
+
             InventoryItemBase userItem = UserInventoryHelpers.AddInventoryItem(scene, so, 0x100, 0x1000);
 
+            // FIXME: Right now, we have to do a tricksy chat listen to make sure we know when the script is running.
+            // In the future, we need to be able to do this programatically more predicably.
+            scene.EventManager.OnChatFromWorld += OnChatFromWorld;
+
             scene.AttachmentsModule.RezSingleAttachmentFromInventory(sp, userItem.ID, (uint)AttachmentPoint.Chest);
 
+            m_chatEvent.WaitOne(60000);
+
             // TODO: Need to have a test that checks the script is actually started but this involves a lot more
             // plumbing of the script engine and either pausing for events or more infrastructure to turn off various
             // script engine delays/asychronicity that isn't helpful in an automated regression testing context.
             SceneObjectGroup attSo = scene.GetSceneObjectGroup(so.Name);
             Assert.That(attSo.ContainsScripts(), Is.True);
+
+            TaskInventoryItem reRezzedScriptItem = attSo.RootPart.Inventory.GetInventoryItem(scriptItem.Name);
+            IScriptModule xengine = scene.RequestModuleInterface<IScriptModule>();
+            Assert.That(xengine.GetScriptState(reRezzedScriptItem.ItemID), Is.True);
         }
 
         [Test]
@@ -379,29 +396,49 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
             ScenePresence sp = SceneHelpers.AddScenePresence(scene, ua1);
 
             SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, sp.UUID, "att-name", 0x10);
-            TaskInventoryHelpers.AddScript(scene, so.RootPart);
+            TaskInventoryItem scriptTaskItem
+                = TaskInventoryHelpers.AddScript(
+                    scene,
+                    so.RootPart,
+                    "scriptItem",
+                    "default { attach(key id) { if (id != NULL_KEY) { llSay(0, \"Hello World\"); } } }");
+
             InventoryItemBase userItem = UserInventoryHelpers.AddInventoryItem(scene, so, 0x100, 0x1000);
 
             // FIXME: Right now, we have to do a tricksy chat listen to make sure we know when the script is running.
             // In the future, we need to be able to do this programatically more predicably.
             scene.EventManager.OnChatFromWorld += OnChatFromWorld;
 
-            SceneObjectGroup soRezzed
-                = (SceneObjectGroup)scene.AttachmentsModule.RezSingleAttachmentFromInventory(sp, userItem.ID, (uint)AttachmentPoint.Chest);
+            SceneObjectGroup rezzedSo
+                = (SceneObjectGroup)(scene.AttachmentsModule.RezSingleAttachmentFromInventory(sp, userItem.ID, (uint)AttachmentPoint.Chest));
 
             // Wait for chat to signal rezzed script has been started.
             m_chatEvent.WaitOne(60000);
 
-            scene.AttachmentsModule.DetachSingleAttachmentToInv(sp, soRezzed);
+            scene.AttachmentsModule.DetachSingleAttachmentToInv(sp, rezzedSo);
 
             InventoryItemBase userItemUpdated = scene.InventoryService.GetItem(userItem);
             AssetBase asset = scene.AssetService.Get(userItemUpdated.AssetID.ToString());
 
+            // TODO: It would probably be better here to check script state via the saving and retrieval of state
+            // information at a higher level, rather than having to inspect the serialization.
             XmlDocument soXml = new XmlDocument();
             soXml.LoadXml(Encoding.UTF8.GetString(asset.Data));
 
             XmlNodeList scriptStateNodes = soXml.GetElementsByTagName("ScriptState");
             Assert.That(scriptStateNodes.Count, Is.EqualTo(1));
+
+            // Re-rez the attachment to check script running state
+            SceneObjectGroup reRezzedSo = (SceneObjectGroup)(scene.AttachmentsModule.RezSingleAttachmentFromInventory(sp, userItem.ID, (uint)AttachmentPoint.Chest));
+
+            // Wait for chat to signal rezzed script has been started.
+            m_chatEvent.WaitOne(60000);
+
+            TaskInventoryItem reRezzedScriptItem = reRezzedSo.RootPart.Inventory.GetInventoryItem(scriptTaskItem.Name);
+            IScriptModule xengine = scene.RequestModuleInterface<IScriptModule>();
+            Assert.That(xengine.GetScriptState(reRezzedScriptItem.ItemID), Is.True);
+
+//            Console.WriteLine(soXml.OuterXml);
         }
 
         /// <summary>
diff --git a/OpenSim/Region/OptionalModules/Agent/UDP/Linden/LindenUDPInfoModule.cs b/OpenSim/Region/OptionalModules/Agent/UDP/Linden/LindenUDPInfoModule.cs
index a7ebecc..ca9bd4a 100644
--- a/OpenSim/Region/OptionalModules/Agent/UDP/Linden/LindenUDPInfoModule.cs
+++ b/OpenSim/Region/OptionalModules/Agent/UDP/Linden/LindenUDPInfoModule.cs
@@ -82,18 +82,6 @@ namespace OpenSim.Region.CoreModules.UDP.Linden
                 m_scenes[scene.RegionInfo.RegionID] = scene;
 
             scene.AddCommand(
-                "Comms", this, "image queues clear",
-                "image queues clear <first-name> <last-name>",
-                "Clear the image queues (textures downloaded via UDP) for a particular client.",
-                (mod, cmd) => MainConsole.Instance.Output(HandleImageQueuesClear(cmd)));
-
-            scene.AddCommand(
-                "Comms", this, "image queues show",
-                "image queues show <first-name> <last-name>",
-                "Show the image queues (textures downloaded via UDP) for a particular client.",
-                (mod, cmd) => MainConsole.Instance.Output(GetImageQueuesReport(cmd)));
-
-            scene.AddCommand(
                 "Comms", this, "show pqueues",
                 "show pqueues [full]",
                 "Show priority queue data for each client", 
@@ -105,8 +93,15 @@ namespace OpenSim.Region.CoreModules.UDP.Linden
                 "Comms", this, "show queues",
                 "show queues [full]",
                 "Show queue data for each client", 
-                "Without the 'full' option, only root agents are shown."
-                  + "  With the 'full' option child agents are also shown.",                                          
+                "Without the 'full' option, only root agents are shown.\n"
+                    + "With the 'full' option child agents are also shown.\n\n"
+                    + "Type          - Rt is a root (avatar) client whilst cd is a child (neighbour interacting) client.\n"
+                    + "Since Last In - Time in milliseconds since last packet received.\n"
+                    + "Pkts In       - Number of packets processed from the client.\n"
+                    + "Pkts Out      - Number of packets sent to the client.\n"
+                    + "Pkts Resent   - Number of packets resent to the client.\n"
+                    + "Bytes Unacked - Number of bytes transferred to the client that are awaiting acknowledgement.\n"
+                    + "Q Pkts *      - Number of packets of various types (land, wind, etc.) to be sent to the client that are waiting for available bandwidth.\n",
                 (mod, cmd) => MainConsole.Instance.Output(GetQueuesReport(cmd)));
 
             scene.AddCommand(
@@ -114,6 +109,12 @@ namespace OpenSim.Region.CoreModules.UDP.Linden
                 "show image queues <first-name> <last-name>",
                 "Show the image queues (textures downloaded via UDP) for a particular client.",
                 (mod, cmd) => MainConsole.Instance.Output(GetImageQueuesReport(cmd)));
+
+            scene.AddCommand(
+                "Comms", this, "clear image queues",
+                "clear image queues <first-name> <last-name>",
+                "Clear the image queues (textures downloaded via UDP) for a particular client.",
+                (mod, cmd) => MainConsole.Instance.Output(HandleImageQueuesClear(cmd)));
             
             scene.AddCommand(
                 "Comms", this, "show throttles",
@@ -373,17 +374,22 @@ namespace OpenSim.Region.CoreModules.UDP.Linden
             int maxNameLength = 18;                                    
             int maxRegionNameLength = 14;
             int maxTypeLength = 4;
-            int totalInfoFieldsLength = maxNameLength + columnPadding + maxRegionNameLength + columnPadding + maxTypeLength + columnPadding;                        
+
+            int totalInfoFieldsLength
+                = maxNameLength + columnPadding
+                + maxRegionNameLength + columnPadding
+                + maxTypeLength + columnPadding;
                                     
             report.Append(GetColumnEntry("User", maxNameLength, columnPadding));
             report.Append(GetColumnEntry("Region", maxRegionNameLength, columnPadding));
             report.Append(GetColumnEntry("Type", maxTypeLength, columnPadding));
             
             report.AppendFormat(
-                "{0,7} {1,7} {2,7} {3,9} {4,7} {5,7} {6,7} {7,7} {8,7} {9,8} {10,7} {11,7}\n",
+                "{0,7} {1,7} {2,7} {3,7} {4,9} {5,7} {6,7} {7,7} {8,7} {9,7} {10,8} {11,7} {12,7}\n",
+                "Since",
+                "Pkts",
                 "Pkts",
                 "Pkts",
-                "Pkts",                                
                 "Bytes",
                 "Q Pkts",
                 "Q Pkts",
@@ -396,7 +402,8 @@ namespace OpenSim.Region.CoreModules.UDP.Linden
     
             report.AppendFormat("{0,-" + totalInfoFieldsLength +  "}", "");
             report.AppendFormat(
-                "{0,7} {1,7} {2,7} {3,9} {4,7} {5,7} {6,7} {7,7} {8,7} {9,8} {10,7} {11,7}\n",
+                "{0,7} {1,7} {2,7} {3,7} {4,9} {5,7} {6,7} {7,7} {8,7} {9,7} {10,8} {11,7} {12,7}\n",
+                "Last In",
                 "In",
                 "Out",
                 "Resent",
@@ -417,22 +424,22 @@ namespace OpenSim.Region.CoreModules.UDP.Linden
                     scene.ForEachClient(
                         delegate(IClientAPI client)
                         {
-                            if (client is IStatsCollector)
-                            {
-                                bool isChild = client.SceneAgent.IsChildAgent;
-                                if (isChild && !showChildren)
-                                    return;
-                        
-                                string name = client.Name;
-                                if (pname != "" && name != pname)
-                                    return;
+                            bool isChild = client.SceneAgent.IsChildAgent;
+                            if (isChild && !showChildren)
+                                return;
+                    
+                            string name = client.Name;
+                            if (pname != "" && name != pname)
+                                return;
 
-                                string regionName = scene.RegionInfo.RegionName;
-                                
-                                report.Append(GetColumnEntry(name, maxNameLength, columnPadding));
-                                report.Append(GetColumnEntry(regionName, maxRegionNameLength, columnPadding));
-                                report.Append(GetColumnEntry(isChild ? "Cd" : "Rt", maxTypeLength, columnPadding));                                  
+                            string regionName = scene.RegionInfo.RegionName;
+
+                            report.Append(GetColumnEntry(name, maxNameLength, columnPadding));
+                            report.Append(GetColumnEntry(regionName, maxRegionNameLength, columnPadding));
+                            report.Append(GetColumnEntry(isChild ? "Cd" : "Rt", maxTypeLength, columnPadding));
 
+                            if (client is IStatsCollector)
+                            {
                                 IStatsCollector stats = (IStatsCollector)client;
                         
                                 report.AppendLine(stats.Report());
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs b/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
index 71a4303..a19d6d7 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
@@ -133,10 +133,7 @@ public sealed class BSPrim : PhysicsActor
         _parentPrim = null;     // not a child or a parent
         _vehicle = new BSDynamics(this);    // add vehicleness
         _childrenPrims = new List<BSPrim>();
-        if (_isPhysical)
-            _mass = CalculateMass();
-        else
-            _mass = 0f;
+        _mass = CalculateMass();
         // do the actual object creation at taint time
         _scene.TaintedObject(delegate()
         {
@@ -149,22 +146,26 @@ public sealed class BSPrim : PhysicsActor
     {
         // m_log.DebugFormat("{0}: Destroy, id={1}", LogHeader, LocalID);
         // DetailLog("{0},Destroy", LocalID);
+
         // Undo any vehicle properties
         _vehicle.ProcessTypeChange(Vehicle.TYPE_NONE);
         _scene.RemoveVehiclePrim(this);     // just to make sure
 
-        // undo any dependance with/on other objects
-        if (_parentPrim != null)
-        {
-            // If I'm someone's child, tell them to forget about me.
-            _parentPrim.RemoveChildFromLinkset(this);
-            _parentPrim = null;
-        }
-
         _scene.TaintedObject(delegate()
         {
+            // undo any dependance with/on other objects
+            if (_parentPrim != null)
+            {
+                // If I'm someone's child, tell them to forget about me.
+                _parentPrim.RemoveChildFromLinkset(this);
+                _parentPrim = null;
+            }
+
+            // make sure there are no possible children depending on me
+            UnlinkAllChildren();
+
             // everything in the C# world will get garbage collected. Tell the C++ world to free stuff.
-            BulletSimAPI.DestroyObject(_scene.WorldID, _localID);
+            BulletSimAPI.DestroyObject(_scene.WorldID, LocalID);
         });
     }
     
@@ -177,8 +178,8 @@ public sealed class BSPrim : PhysicsActor
             _size = value;
             _scene.TaintedObject(delegate()
             {
-                if (_isPhysical) _mass = CalculateMass();   // changing size changes the mass
-                BulletSimAPI.SetObjectScaleMass(_scene.WorldID, _localID, _scale, _mass, _isPhysical);
+                _mass = CalculateMass();   // changing size changes the mass
+                BulletSimAPI.SetObjectScaleMass(_scene.WorldID, _localID, _scale, Mass, IsPhysical);
                 RecreateGeomAndObject();
             });
         } 
@@ -188,7 +189,7 @@ public sealed class BSPrim : PhysicsActor
             _pbs = value;
             _scene.TaintedObject(delegate()
             {
-                if (_isPhysical) _mass = CalculateMass();   // changing the shape changes the mass
+                _mass = CalculateMass();   // changing the shape changes the mass
                 RecreateGeomAndObject();
             });
         } 
@@ -272,7 +273,10 @@ public sealed class BSPrim : PhysicsActor
                 DetailLog("{0},AddChildToLinkset,child={1}", LocalID, pchild.LocalID);
                 _childrenPrims.Add(child);
                 child._parentPrim = this;    // the child has gained a parent
-                RecreateGeomAndObject();    // rebuild my shape with the new child added
+                // RecreateGeomAndObject();    // rebuild my shape with the new child added
+                LinkAChildToMe(pchild);     // build the physical binding between me and the child
+
+                _mass = CalculateMass();
             }
         });
         return;
@@ -288,14 +292,21 @@ public sealed class BSPrim : PhysicsActor
             if (_childrenPrims.Contains(child))
             {
                 DebugLog("{0}: RemoveChildFromLinkset: Removing constraint to {1}", LogHeader, child.LocalID);
-                DetailLog("{0},RemoveChildToLinkset,child={1}", LocalID, pchild.LocalID);
-                if (!BulletSimAPI.RemoveConstraintByID(_scene.WorldID, child.LocalID))
-                {
-                    m_log.ErrorFormat("{0}: RemoveChildFromLinkset: Failed remove constraint for {1}", LogHeader, child.LocalID);
-                }
+                DetailLog("{0},RemoveChildFromLinkset,child={1}", LocalID, pchild.LocalID);
                 _childrenPrims.Remove(child);
                 child._parentPrim = null;    // the child has lost its parent
-                RecreateGeomAndObject();    // rebuild my shape with the child removed
+                if (_childrenPrims.Count == 0)
+                {
+                    // if the linkset is empty, make sure all linkages have been removed
+                    UnlinkAllChildren();
+                }
+                else
+                {
+                    // RecreateGeomAndObject();    // rebuild my shape with the child removed
+                    UnlinkAChildFromMe(pchild);
+                }
+
+                _mass = CalculateMass();
             }
             else
             {
@@ -314,12 +325,19 @@ public sealed class BSPrim : PhysicsActor
     // Set motion values to zero.
     // Do it to the properties so the values get set in the physics engine.
     // Push the setting of the values to the viewer.
+    // Called at taint time!
     private void ZeroMotion()
     {
-        Velocity = OMV.Vector3.Zero;
+        _velocity = OMV.Vector3.Zero;
         _acceleration = OMV.Vector3.Zero;
-        RotationalVelocity = OMV.Vector3.Zero;
-        base.RequestPhysicsterseUpdate();
+        _rotationalVelocity = OMV.Vector3.Zero;
+
+        // Zero some other properties directly into the physics engine
+        IntPtr obj = BulletSimAPI.GetBodyHandleWorldID2(_scene.WorldID, LocalID);
+        BulletSimAPI.SetVelocity2(obj, OMV.Vector3.Zero);
+        BulletSimAPI.SetAngularVelocity2(obj, OMV.Vector3.Zero);
+        BulletSimAPI.SetInterpolation2(obj, OMV.Vector3.Zero, OMV.Vector3.Zero);
+        BulletSimAPI.ClearForces2(obj);
     }
 
     public override void LockAngularMotion(OMV.Vector3 axis)
@@ -347,9 +365,17 @@ public sealed class BSPrim : PhysicsActor
             });
         } 
     }
+
+    // Return the effective mass of the object. Non-physical objects do not have mass.
     public override float Mass { 
-        get { return _mass; } 
+        get {
+            if (IsPhysical)
+                return _mass;
+            else
+                return 0f;
+        }
     }
+
     public override OMV.Vector3 Force { 
         get { return _force; } 
         set {
@@ -429,7 +455,8 @@ public sealed class BSPrim : PhysicsActor
     // Called from Scene when doing simulation step so we're in taint processing time.
     public void StepVehicle(float timeStep)
     {
-        _vehicle.Step(timeStep);
+        if (IsPhysical)
+            _vehicle.Step(timeStep);
     }
 
     // Allows the detection of collisions with inherently non-physical prims. see llVolumeDetect for more
@@ -526,20 +553,13 @@ public sealed class BSPrim : PhysicsActor
     {
         // m_log.DebugFormat("{0}: ID={1}, SetObjectDynamic: IsStatic={2}, IsSolid={3}", LogHeader, _localID, IsStatic, IsSolid);
         // non-physical things work best with a mass of zero
-        if (IsStatic)
-        {
-            _mass = 0f;
-        }
-        else
+        if (!IsStatic)
         {
             _mass = CalculateMass();
-            // If it's dynamic, make sure the hull has been created for it
-            // This shouldn't do much work if the object had previously been built
             RecreateGeomAndObject();
-
         }
-        DetailLog("{0},SetObjectDynamic,taint,static={1},solid={2},mass={3}", LocalID, IsStatic, IsSolid, _mass);
-        BulletSimAPI.SetObjectProperties(_scene.WorldID, LocalID, IsStatic, IsSolid, SubscribedEvents(), _mass);
+        DetailLog("{0},SetObjectDynamic,taint,static={1},solid={2},mass={3}", LocalID, IsStatic, IsSolid, Mass);
+        BulletSimAPI.SetObjectProperties(_scene.WorldID, LocalID, IsStatic, IsSolid, SubscribedEvents(), Mass);
     }
 
     // prims don't fly
@@ -1234,7 +1254,7 @@ public sealed class BSPrim : PhysicsActor
         if (IsRootOfLinkset)
         {
             // Create a linkset around this object
-            CreateLinksetWithConstraints();
+            CreateLinkset();
         }
         else
         {
@@ -1247,30 +1267,6 @@ public sealed class BSPrim : PhysicsActor
         }
     }
 
-    // Create a linkset by creating a compound hull at the root prim that consists of all
-    // the children.
-    // NOTE: This does not allow proper collisions with the children prims so it is not a workable solution
-    void CreateLinksetWithCompoundHull()
-    {
-        // If I am the root prim of a linkset, replace my physical shape with all the
-        // pieces of the children.
-        // All of the children should have called CreateGeom so they have a hull
-        // in the physics engine already. Here we pull together all of those hulls
-        // into one shape.
-        int totalPrimsInLinkset = _childrenPrims.Count + 1;
-        // m_log.DebugFormat("{0}: CreateLinkset. Root prim={1}, prims={2}", LogHeader, LocalID, totalPrimsInLinkset);
-        ShapeData[] shapes = new ShapeData[totalPrimsInLinkset];
-        FillShapeInfo(out shapes[0]);
-        int ii = 1;
-        foreach (BSPrim prim in _childrenPrims)
-        {
-            // m_log.DebugFormat("{0}: CreateLinkset: adding prim {1}", LogHeader, prim.LocalID);
-            prim.FillShapeInfo(out shapes[ii]);
-            ii++;
-        }
-        BulletSimAPI.CreateLinkset(_scene.WorldID, totalPrimsInLinkset, shapes);
-    }
-
     // Copy prim's info into the BulletSim shape description structure
     public void FillShapeInfo(out ShapeData shape)
     {
@@ -1280,7 +1276,7 @@ public sealed class BSPrim : PhysicsActor
         shape.Rotation = _orientation;
         shape.Velocity = _velocity;
         shape.Scale = _scale;
-        shape.Mass = _isPhysical ? _mass : 0f;
+        shape.Mass = Mass;
         shape.Buoyancy = _buoyancy;
         shape.HullKey = _hullKey;
         shape.MeshKey = _meshKey;
@@ -1290,45 +1286,73 @@ public sealed class BSPrim : PhysicsActor
         shape.Static = _isPhysical ? ShapeData.numericFalse : ShapeData.numericTrue;
     }
 
+    #region Linkset creation and destruction
+
     // Create the linkset by putting constraints between the objects of the set so they cannot move
     // relative to each other.
-    // TODO: make this more effeicient: a large linkset gets rebuilt over and over and prims are added
-    void CreateLinksetWithConstraints()
+    void CreateLinkset()
     {
         DebugLog("{0}: CreateLinkset. Root prim={1}, prims={2}", LogHeader, LocalID, _childrenPrims.Count+1);
 
         // remove any constraints that might be in place
-        foreach (BSPrim prim in _childrenPrims)
-        {
-            DebugLog("{0}: CreateLinkset: RemoveConstraint between root prim {1} and child prim {2}", LogHeader, LocalID, prim.LocalID);
-            BulletSimAPI.RemoveConstraint(_scene.WorldID, LocalID, prim.LocalID);
-        }
+        DebugLog("{0}: CreateLinkset: RemoveConstraints between me and any children", LogHeader, LocalID);
+        BulletSimAPI.RemoveConstraintByID(_scene.WorldID, LocalID);
+
         // create constraints between the root prim and each of the children
         foreach (BSPrim prim in _childrenPrims)
         {
-            // Zero motion for children so they don't interpolate
-            prim.ZeroMotion();
-
-            // relative position normalized to the root prim
-            OMV.Quaternion invThisOrientation = OMV.Quaternion.Inverse(this._orientation);
-            OMV.Vector3 childRelativePosition = (prim._position - this._position) * invThisOrientation;
-
-            // relative rotation of the child to the parent
-            OMV.Quaternion childRelativeRotation = invThisOrientation * prim._orientation;
-
-            // this is a constraint that allows no freedom of movement between the two objects
-            // http://bulletphysics.org/Bullet/phpBB3/viewtopic.php?t=4818
-            DebugLog("{0}: CreateLinkset: Adding a constraint between root prim {1} and child prim {2}", LogHeader, LocalID, prim.LocalID);
-            BulletSimAPI.AddConstraint(_scene.WorldID, LocalID, prim.LocalID, 
-                childRelativePosition,
-                childRelativeRotation,
-                OMV.Vector3.Zero,
-                OMV.Quaternion.Identity,
-                OMV.Vector3.Zero, OMV.Vector3.Zero,
-                OMV.Vector3.Zero, OMV.Vector3.Zero);
+            LinkAChildToMe(prim);
         }
     }
 
+    // Create a constraint between me (root of linkset) and the passed prim (the child).
+    // Called at taint time!
+    private void LinkAChildToMe(BSPrim childPrim)
+    {
+        // Zero motion for children so they don't interpolate
+        childPrim.ZeroMotion();
+
+        // relative position normalized to the root prim
+        OMV.Quaternion invThisOrientation = OMV.Quaternion.Inverse(this._orientation);
+        OMV.Vector3 childRelativePosition = (childPrim._position - this._position) * invThisOrientation;
+
+        // relative rotation of the child to the parent
+        OMV.Quaternion childRelativeRotation = invThisOrientation * childPrim._orientation;
+
+        // create a constraint that allows no freedom of movement between the two objects
+        // http://bulletphysics.org/Bullet/phpBB3/viewtopic.php?t=4818
+        DebugLog("{0}: CreateLinkset: Adding a constraint between root prim {1} and child prim {2}", LogHeader, LocalID, childPrim.LocalID);
+        DetailLog("{0},LinkAChildToMe,taint,root={1},child={2}", LocalID, LocalID, childPrim.LocalID);
+        BulletSimAPI.AddConstraint(_scene.WorldID, LocalID, childPrim.LocalID, 
+            childRelativePosition,
+            childRelativeRotation,
+            OMV.Vector3.Zero,
+            OMV.Quaternion.Identity,
+            OMV.Vector3.Zero, OMV.Vector3.Zero,
+            OMV.Vector3.Zero, OMV.Vector3.Zero);
+    }
+
+    // Remove linkage between myself and a particular child
+    // Called at taint time!
+    private void UnlinkAChildFromMe(BSPrim childPrim)
+    {
+        DebugLog("{0}: UnlinkAChildFromMe: RemoveConstraint between root prim {1} and child prim {2}", 
+                    LogHeader, LocalID, childPrim.LocalID);
+        DetailLog("{0},UnlinkAChildFromMe,taint,root={1},child={2}", LocalID, LocalID, childPrim.LocalID);
+        BulletSimAPI.RemoveConstraint(_scene.WorldID, LocalID, childPrim.LocalID);
+    }
+
+    // Remove linkage between myself and any possible children I might have
+    // Called at taint time!
+    private void UnlinkAllChildren()
+    {
+        DebugLog("{0}: UnlinkAllChildren:", LogHeader);
+        DetailLog("{0},UnlinkAllChildren,taint", LocalID);
+        BulletSimAPI.RemoveConstraintByID(_scene.WorldID, LocalID);
+    }
+
+    #endregion // Linkset creation and destruction
+
     // Rebuild the geometry and object.
     // This is called when the shape changes so we need to recreate the mesh/hull.
     // No locking here because this is done when the physics engine is not simulating
@@ -1405,7 +1429,7 @@ public sealed class BSPrim : PhysicsActor
         // Don't check for damping here -- it's done in BulletSim and SceneObjectPart.
 
         // Updates only for individual prims and for the root object of a linkset.
-        if (this._parentPrim == null)
+        if (_parentPrim == null)
         {
             // Assign to the local variables so the normal set action does not happen
             _position = entprop.Position;
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs b/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs
index 8773485..7cc3fe3 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs
@@ -630,6 +630,27 @@ public class BSScene : PhysicsScene, IPhysicsParameters
     public override void Dispose()
     {
         // m_log.DebugFormat("{0}: Dispose()", LogHeader);
+
+        // make sure no stepping happens while we're deleting stuff
+        m_initialized = false;
+
+        foreach (KeyValuePair<uint, BSCharacter> kvp in m_avatars)
+        {
+            kvp.Value.Destroy();
+        }
+        m_avatars.Clear();
+
+        foreach (KeyValuePair<uint, BSPrim> kvp in m_prims)
+        {
+            kvp.Value.Destroy();
+        }
+        m_prims.Clear();
+
+        // Anything left in the unmanaged code should be cleaned out
+        BulletSimAPI.Shutdown(WorldID);
+
+        // Not logging any more
+        PhysicsLogging.Close();
     }
 
     public override Dictionary<uint, float> GetTopColliders()
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BulletSimAPI.cs b/OpenSim/Region/Physics/BulletSPlugin/BulletSimAPI.cs
index babb707..54a8cfd 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BulletSimAPI.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BulletSimAPI.cs
@@ -291,13 +291,14 @@ public static extern void SetDebugLogCallback(DebugLogCallback callback);
 // ===============================================================================
 // ===============================================================================
 // ===============================================================================
-// A new version of the API that moves all the logic out of the C++ code and into
+// A new version of the API that enables moving all the logic out of the C++ code and into
 //    the C# code. This will make modifications easier for the next person.
 // This interface passes the actual pointers to the objects in the unmanaged
 //    address space. All the management (calls for creation/destruction/lookup)
 //    is done in the C# code.
-// The names have a 2 tacked on. This will be removed as the code gets rebuilt
-//    and the old code is removed from the C# code.
+// The names have a "2" tacked on. This will be removed as the C# code gets rebuilt
+//    and the old code is removed.
+
 [DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
 public static extern IntPtr GetSimHandle2(uint worldID);
 
@@ -307,8 +308,101 @@ public static extern IntPtr GetBodyHandleWorldID2(uint worldID, uint id);
 [DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
 public static extern IntPtr GetBodyHandle2(IntPtr sim, uint id);
 
+// ===============================================================================
 [DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
-public static extern IntPtr ClearForces2(IntPtr obj);
+public static extern IntPtr Initialize2(Vector3 maxPosition, IntPtr parms,
+                                                                                        int maxCollisions,  IntPtr collisionArray,
+                                                                                        int maxUpdates, IntPtr updateArray);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool UpdateParameter2(IntPtr sim, uint localID, String parm, float value);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern void SetHeightmap2(IntPtr sim, float[] heightmap);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern void Shutdown2(IntPtr sim);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern int PhysicsStep2(IntPtr sim, float timeStep, int maxSubSteps, float fixedTimeStep,
+                        out int updatedEntityCount, 
+                        out IntPtr updatedEntitiesPtr,
+                        out int collidersCount,
+                        out IntPtr collidersPtr);
+
+/*
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern IntPtr CreateMesh2(IntPtr sim, int indicesCount, int* indices, int verticesCount, float* vertices );
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool BuildHull2(IntPtr sim, IntPtr mesh);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool ReleaseHull2(IntPtr sim, IntPtr mesh);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool DestroyMesh2(IntPtr sim, IntPtr mesh);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern IntPtr CreateObject2(IntPtr sim, ShapeData shapeData);
+*/
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern IntPtr CreateConstraint2(IntPtr sim, IntPtr obj1, IntPtr obj2,
+                    Vector3 frame1loc, Quaternion frame1rot,
+                    Vector3 frame2loc, Quaternion frame2rot,
+                    Vector3 lowLinear, Vector3 hiLinear, Vector3 lowAngular, Vector3 hiAngular);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool DestroyConstraint2(IntPtr sim, IntPtr constrain);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern Vector3 GetPosition2(IntPtr obj);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern Quaternion GetOrientation2(IntPtr obj);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetTranslation2(IntPtr obj, Vector3 position, Quaternion rotation);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetVelocity2(IntPtr obj, Vector3 velocity);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetAngularVelocity2(IntPtr obj, Vector3 angularVelocity);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetObjectForce2(IntPtr obj, Vector3 force);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetCcdMotionThreshold2(IntPtr obj, float val);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetCcdSweepSphereRadius2(IntPtr obj, float val);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetDamping2(IntPtr obj, float lin_damping, float ang_damping);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetDeactivationTime2(IntPtr obj, float val);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetSleepingThresholds2(IntPtr obj, float lin_threshold, float ang_threshold);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetContactProcessingThreshold2(IntPtr obj, float val);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetFriction2(IntPtr obj, float val);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetRestitution2(IntPtr obj, float val);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetLinearVelocity2(IntPtr obj, Vector3 val);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetInterpolation2(IntPtr obj, Vector3 lin, Vector3 ang);
 
 [DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
 public static extern IntPtr SetCollisionFlags2(IntPtr obj, uint flags);
@@ -319,5 +413,35 @@ public static extern IntPtr AddToCollisionFlags2(IntPtr obj, uint flags);
 [DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
 public static extern IntPtr RemoveFromCollisionFlags2(IntPtr obj, uint flags);
 
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetMassProps2(IntPtr obj, float mass, Vector3 inertia);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool UpdateInertiaTensor2(IntPtr obj);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetGravity2(IntPtr obj, Vector3 val);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern IntPtr ClearForces2(IntPtr obj);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool SetMargin2(IntPtr obj, float val);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool UpdateSingleAabb2(IntPtr world, IntPtr obj);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool AddObjectToWorld2(IntPtr world, IntPtr obj);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool RemoveObjectFromWorld2(IntPtr world, IntPtr obj);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern bool DestroyObject2(IntPtr world, uint id);
+
+[DllImport("BulletSim", CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
+public static extern void DumpPhysicsStatistics2(IntPtr sim);
+
 }
 }
diff --git a/OpenSim/Tests/Common/Helpers/TaskInventoryHelpers.cs b/OpenSim/Tests/Common/Helpers/TaskInventoryHelpers.cs
index fba03ab..0a2b30a 100644
--- a/OpenSim/Tests/Common/Helpers/TaskInventoryHelpers.cs
+++ b/OpenSim/Tests/Common/Helpers/TaskInventoryHelpers.cs
@@ -80,8 +80,26 @@ namespace OpenSim.Tests.Common
         /// <returns>The item that was added</returns>
         public static TaskInventoryItem AddScript(Scene scene, SceneObjectPart part)
         {
+            return AddScript(scene, part, "scriptItem", "default { state_entry() { llSay(0, \"Hello World\"); } }");
+        }
+
+        /// <summary>
+        /// Add a simple script to the given part.
+        /// </summary>
+        /// <remarks>
+        /// TODO: Accept input for item and asset IDs to avoid mysterious script failures that try to use any of these
+        /// functions more than once in a test.
+        /// </remarks>
+        /// <param name="scene"></param>
+        /// <param name="part"></param>
+        /// <param name="scriptName">Name of the script to add</param>
+        /// <param name="scriptSource">LSL script source</param>
+        /// <returns>The item that was added</returns>
+        public static TaskInventoryItem AddScript(
+            Scene scene, SceneObjectPart part, string scriptName, string scriptSource)
+        {
             AssetScriptText ast = new AssetScriptText();
-            ast.Source = "default { state_entry() { llSay(0, \"Hello World\"); } }";
+            ast.Source = scriptSource;
             ast.Encode();
 
             UUID assetUuid = new UUID("00000000-0000-0000-1000-000000000000");
@@ -91,7 +109,7 @@ namespace OpenSim.Tests.Common
             scene.AssetService.Store(asset);
             TaskInventoryItem item
                 = new TaskInventoryItem 
-                    { Name = "scriptItem", AssetID = assetUuid, ItemID = itemUuid,
+                    { Name = scriptName, AssetID = assetUuid, ItemID = itemUuid,
                       Type = (int)AssetType.LSLText, InvType = (int)InventoryType.LSL };
             part.Inventory.AddInventoryItem(item, true);