6 files changed, 146 insertions, 278 deletions

diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index 548dfd3..98afb75 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -1385,17 +1385,22 @@ namespace OpenSim.Region.Framework.Scenes
                 bool DCFlagKeyPressed = false;
                 Vector3 agent_control_v3 = Vector3.Zero;
 
-                bool oldflying = Flying;
+                bool newFlying = actor.Flying;
 
                 if (ForceFly)
-                    actor.Flying = true;
+                    newFlying = true;
                 else if (FlyDisabled)
-                    actor.Flying = false;
+                    newFlying = false;
                 else
-                    actor.Flying = ((flags & AgentManager.ControlFlags.AGENT_CONTROL_FLY) != 0);
-
-                if (actor.Flying != oldflying)
-                    update_movementflag = true;
+                    newFlying = ((flags & AgentManager.ControlFlags.AGENT_CONTROL_FLY) != 0);

+

+                if (actor.Flying != newFlying)

+                {

+                    // Note: ScenePresence.Flying is actually fetched from the physical actor

+                    //     so setting PhysActor.Flying here also sets the ScenePresence's value.

+                    actor.Flying = newFlying;

+                    update_movementflag = true;

+                }
 
                 if (ParentID == 0)
                 {
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs b/OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs
index e2f7af9..1b23a36 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs
@@ -124,10 +124,14 @@ public class BSCharacter : PhysicsActor
         // do actual create at taint time
         _scene.TaintedObject("BSCharacter.create", delegate()
         {
+            DetailLog("{0},BSCharacter.create", _localID);
             BulletSimAPI.CreateObject(parent_scene.WorldID, shapeData);
 
+            // Set the buoyancy for flying. This will be refactored when all the settings happen in C#
+            BulletSimAPI.SetObjectBuoyancy(_scene.WorldID, LocalID, _buoyancy);
+
             m_body = new BulletBody(LocalID, BulletSimAPI.GetBodyHandle2(_scene.World.Ptr, LocalID));
-            // avatars get all collisions no matter what
+            // avatars get all collisions no matter what (makes walking on ground and such work)
             BulletSimAPI.AddToCollisionFlags2(Body.Ptr, CollisionFlags.BS_SUBSCRIBE_COLLISION_EVENTS);
         });
             
@@ -137,7 +141,7 @@ public class BSCharacter : PhysicsActor
     // called when this character is being destroyed and the resources should be released
     public void Destroy()
     {
-        // DetailLog("{0},BSCharacter.Destroy", LocalID);
+        DetailLog("{0},BSCharacter.Destroy", LocalID);
         _scene.TaintedObject("BSCharacter.destroy", delegate()
         {
             BulletSimAPI.DestroyObject(_scene.WorldID, _localID);
@@ -319,14 +323,13 @@ public class BSCharacter : PhysicsActor
     public override bool Flying { 
         get { return _flying; } 
         set {
-            if (_flying != value)
-            {
-                _flying = value;
-                // simulate flying by changing the effect of gravity
-                this.Buoyancy = ComputeBuoyancyFromFlying(_flying);
-            }
+            _flying = value;
+            // simulate flying by changing the effect of gravity
+            this.Buoyancy = ComputeBuoyancyFromFlying(_flying);
         } 
     }
+    // Flying is implimented by changing the avatar's buoyancy.
+    // Would this be done better with a vehicle type?
     private float ComputeBuoyancyFromFlying(bool ifFlying) {
         return ifFlying ? 1f : 0f;
     }
@@ -488,11 +491,9 @@ public class BSCharacter : PhysicsActor
         // Avatars don't report their changes the usual way. Changes are checked for in the heartbeat loop.
         // base.RequestPhysicsterseUpdate();
 
-        /*
         DetailLog("{0},BSCharacter.UpdateProperties,call,pos={1},orient={2},vel={3},accel={4},rotVel={5}",
                 LocalID, entprop.Position, entprop.Rotation, entprop.Velocity, 
                 entprop.Acceleration, entprop.RotationalVelocity);
-         */
     }
 
     // Called by the scene when a collision with this object is reported
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs b/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
index 5a9f135..d7213fc 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
@@ -57,6 +57,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
         private int frcount = 0;                                        // Used to limit dynamics debug output to
                                                                         // every 100th frame
 
+        private BSScene m_physicsScene;
         private BSPrim m_prim;      // the prim this dynamic controller belongs to
 
         // Vehicle properties
@@ -74,7 +75,6 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                                                                         // HOVER_UP_ONLY
                                                                         // LIMIT_MOTOR_UP
                                                                         // LIMIT_ROLL_ONLY
-        private VehicleFlag m_Hoverflags = (VehicleFlag)0;
         private Vector3 m_BlockingEndPoint = Vector3.Zero;
         private Quaternion m_RollreferenceFrame = Quaternion.Identity;
         // Linear properties
@@ -124,15 +124,16 @@ namespace OpenSim.Region.Physics.BulletSPlugin
         private float m_verticalAttractionEfficiency = 1.0f;        // damped
         private float m_verticalAttractionTimescale = 500f;         // Timescale > 300  means no vert attractor.
 
-        public BSDynamics(BSPrim myPrim)
+        public BSDynamics(BSScene myScene, BSPrim myPrim)
         {
+            m_physicsScene = myScene;
             m_prim = myPrim;
             m_type = Vehicle.TYPE_NONE;
         }
 
         internal void ProcessFloatVehicleParam(Vehicle pParam, float pValue, float timestep)
         {
-            DetailLog("{0},ProcessFloatVehicleParam,param={1},val={2}", m_prim.LocalID, pParam, pValue);
+            VDetailLog("{0},ProcessFloatVehicleParam,param={1},val={2}", m_prim.LocalID, pParam, pValue);
             switch (pParam)
             {
                 case Vehicle.ANGULAR_DEFLECTION_EFFICIENCY:
@@ -231,7 +232,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
 
         internal void ProcessVectorVehicleParam(Vehicle pParam, Vector3 pValue, float timestep)
         {
-            DetailLog("{0},ProcessVectorVehicleParam,param={1},val={2}", m_prim.LocalID, pParam, pValue);
+            VDetailLog("{0},ProcessVectorVehicleParam,param={1},val={2}", m_prim.LocalID, pParam, pValue);
             switch (pParam)
             {
                 case Vehicle.ANGULAR_FRICTION_TIMESCALE:
@@ -266,7 +267,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
 
         internal void ProcessRotationVehicleParam(Vehicle pParam, Quaternion pValue)
         {
-            DetailLog("{0},ProcessRotationalVehicleParam,param={1},val={2}", m_prim.LocalID, pParam, pValue);
+            VDetailLog("{0},ProcessRotationalVehicleParam,param={1},val={2}", m_prim.LocalID, pParam, pValue);
             switch (pParam)
             {
                 case Vehicle.REFERENCE_FRAME:
@@ -280,164 +281,27 @@ namespace OpenSim.Region.Physics.BulletSPlugin
 
         internal void ProcessVehicleFlags(int pParam, bool remove)
         {
-            DetailLog("{0},ProcessVehicleFlags,param={1},remove={2}", m_prim.LocalID, pParam, remove);
+            VDetailLog("{0},ProcessVehicleFlags,param={1},remove={2}", m_prim.LocalID, pParam, remove);
+            VehicleFlag parm = (VehicleFlag)pParam;
             if (remove)
             {
                 if (pParam == -1)
                 {
                     m_flags = (VehicleFlag)0;
-                    m_Hoverflags = (VehicleFlag)0;
-                    return;
                 }
-                if ((pParam & (int)VehicleFlag.HOVER_GLOBAL_HEIGHT) == (int)VehicleFlag.HOVER_GLOBAL_HEIGHT)
-                {
-                    if ((m_Hoverflags & VehicleFlag.HOVER_GLOBAL_HEIGHT) != (VehicleFlag)0)
-                        m_Hoverflags &= ~(VehicleFlag.HOVER_GLOBAL_HEIGHT);
-                }
-                if ((pParam & (int)VehicleFlag.HOVER_TERRAIN_ONLY) == (int)VehicleFlag.HOVER_TERRAIN_ONLY)
-                {
-                    if ((m_Hoverflags & VehicleFlag.HOVER_TERRAIN_ONLY) != (VehicleFlag)0)
-                        m_Hoverflags &= ~(VehicleFlag.HOVER_TERRAIN_ONLY);
-                }
-                if ((pParam & (int)VehicleFlag.HOVER_UP_ONLY) == (int)VehicleFlag.HOVER_UP_ONLY)
-                {
-                    if ((m_Hoverflags & VehicleFlag.HOVER_UP_ONLY) != (VehicleFlag)0)
-                        m_Hoverflags &= ~(VehicleFlag.HOVER_UP_ONLY);
-                }
-                if ((pParam & (int)VehicleFlag.HOVER_WATER_ONLY) == (int)VehicleFlag.HOVER_WATER_ONLY)
-                {
-                    if ((m_Hoverflags & VehicleFlag.HOVER_WATER_ONLY) != (VehicleFlag)0)
-                        m_Hoverflags &= ~(VehicleFlag.HOVER_WATER_ONLY);
-                }
-                if ((pParam & (int)VehicleFlag.LIMIT_MOTOR_UP) == (int)VehicleFlag.LIMIT_MOTOR_UP)
-                {
-                    if ((m_flags & VehicleFlag.LIMIT_MOTOR_UP) != (VehicleFlag)0)
-                        m_flags &= ~(VehicleFlag.LIMIT_MOTOR_UP);
-                }
-                if ((pParam & (int)VehicleFlag.LIMIT_ROLL_ONLY) == (int)VehicleFlag.LIMIT_ROLL_ONLY)
-                {
-                    if ((m_flags & VehicleFlag.LIMIT_ROLL_ONLY) != (VehicleFlag)0)
-                        m_flags &= ~(VehicleFlag.LIMIT_ROLL_ONLY);
-                }
-                if ((pParam & (int)VehicleFlag.MOUSELOOK_BANK) == (int)VehicleFlag.MOUSELOOK_BANK)
-                {
-                    if ((m_flags & VehicleFlag.MOUSELOOK_BANK) != (VehicleFlag)0)
-                        m_flags &= ~(VehicleFlag.MOUSELOOK_BANK);
-                }
-                if ((pParam & (int)VehicleFlag.MOUSELOOK_STEER) == (int)VehicleFlag.MOUSELOOK_STEER)
-                {
-                    if ((m_flags & VehicleFlag.MOUSELOOK_STEER) != (VehicleFlag)0)
-                        m_flags &= ~(VehicleFlag.MOUSELOOK_STEER);
-                }
-                if ((pParam & (int)VehicleFlag.NO_DEFLECTION_UP) == (int)VehicleFlag.NO_DEFLECTION_UP)
-                {
-                    if ((m_flags & VehicleFlag.NO_DEFLECTION_UP) != (VehicleFlag)0)
-                        m_flags &= ~(VehicleFlag.NO_DEFLECTION_UP);
-                }
-                if ((pParam & (int)VehicleFlag.CAMERA_DECOUPLED) == (int)VehicleFlag.CAMERA_DECOUPLED)
-                {
-                    if ((m_flags & VehicleFlag.CAMERA_DECOUPLED) != (VehicleFlag)0)
-                        m_flags &= ~(VehicleFlag.CAMERA_DECOUPLED);
-                }
-                if ((pParam & (int)VehicleFlag.NO_X) == (int)VehicleFlag.NO_X)
-                {
-                    if ((m_flags & VehicleFlag.NO_X) != (VehicleFlag)0)
-                        m_flags &= ~(VehicleFlag.NO_X);
-                }
-                if ((pParam & (int)VehicleFlag.NO_Y) == (int)VehicleFlag.NO_Y)
-                {
-                    if ((m_flags & VehicleFlag.NO_Y) != (VehicleFlag)0)
-                        m_flags &= ~(VehicleFlag.NO_Y);
-                }
-                if ((pParam & (int)VehicleFlag.NO_Z) == (int)VehicleFlag.NO_Z)
-                {
-                    if ((m_flags & VehicleFlag.NO_Z) != (VehicleFlag)0)
-                        m_flags &= ~(VehicleFlag.NO_Z);
-                }
-                if ((pParam & (int)VehicleFlag.LOCK_HOVER_HEIGHT) == (int)VehicleFlag.LOCK_HOVER_HEIGHT)
-                {
-                    if ((m_Hoverflags & VehicleFlag.LOCK_HOVER_HEIGHT) != (VehicleFlag)0)
-                        m_Hoverflags &= ~(VehicleFlag.LOCK_HOVER_HEIGHT);
-                }
-                if ((pParam & (int)VehicleFlag.NO_DEFLECTION) == (int)VehicleFlag.NO_DEFLECTION)
-                {
-                    if ((m_flags & VehicleFlag.NO_DEFLECTION) != (VehicleFlag)0)
-                        m_flags &= ~(VehicleFlag.NO_DEFLECTION);
-                }
-                if ((pParam & (int)VehicleFlag.LOCK_ROTATION) == (int)VehicleFlag.LOCK_ROTATION)
+                else
                 {
-                    if ((m_flags & VehicleFlag.LOCK_ROTATION) != (VehicleFlag)0)
-                        m_flags &= ~(VehicleFlag.LOCK_ROTATION);
+                    m_flags &= ~parm;
                 }
             }
-            else
-            {
-                if ((pParam & (int)VehicleFlag.HOVER_GLOBAL_HEIGHT) == (int)VehicleFlag.HOVER_GLOBAL_HEIGHT)
-                {
-                    m_Hoverflags |= (VehicleFlag.HOVER_GLOBAL_HEIGHT | m_flags);
-                }
-                if ((pParam & (int)VehicleFlag.HOVER_TERRAIN_ONLY) == (int)VehicleFlag.HOVER_TERRAIN_ONLY)
-                {
-                    m_Hoverflags |= (VehicleFlag.HOVER_TERRAIN_ONLY | m_flags);
-                }
-                if ((pParam & (int)VehicleFlag.HOVER_UP_ONLY) == (int)VehicleFlag.HOVER_UP_ONLY)
-                {
-                    m_Hoverflags |= (VehicleFlag.HOVER_UP_ONLY | m_flags);
-                }
-                if ((pParam & (int)VehicleFlag.HOVER_WATER_ONLY) == (int)VehicleFlag.HOVER_WATER_ONLY)
-                {
-                    m_Hoverflags |= (VehicleFlag.HOVER_WATER_ONLY | m_flags);
-                }
-                if ((pParam & (int)VehicleFlag.LIMIT_MOTOR_UP) == (int)VehicleFlag.LIMIT_MOTOR_UP)
-                {
-                    m_flags |= (VehicleFlag.LIMIT_MOTOR_UP | m_flags);
-                }
-                if ((pParam & (int)VehicleFlag.MOUSELOOK_BANK) == (int)VehicleFlag.MOUSELOOK_BANK)
-                {
-                    m_flags |= (VehicleFlag.MOUSELOOK_BANK | m_flags);
-                }
-                if ((pParam & (int)VehicleFlag.MOUSELOOK_STEER) == (int)VehicleFlag.MOUSELOOK_STEER)
-                {
-                    m_flags |= (VehicleFlag.MOUSELOOK_STEER | m_flags);
-                }
-                if ((pParam & (int)VehicleFlag.NO_DEFLECTION_UP) == (int)VehicleFlag.NO_DEFLECTION_UP)
-                {
-                    m_flags |= (VehicleFlag.NO_DEFLECTION_UP | m_flags);
-                }
-                if ((pParam & (int)VehicleFlag.CAMERA_DECOUPLED) == (int)VehicleFlag.CAMERA_DECOUPLED)
-                {
-                    m_flags |= (VehicleFlag.CAMERA_DECOUPLED | m_flags);
-                }
-                if ((pParam & (int)VehicleFlag.NO_X) == (int)VehicleFlag.NO_X)
-                {
-                    m_flags |= (VehicleFlag.NO_X);
-                }
-                if ((pParam & (int)VehicleFlag.NO_Y) == (int)VehicleFlag.NO_Y)
-                {
-                    m_flags |= (VehicleFlag.NO_Y);
-                }
-                if ((pParam & (int)VehicleFlag.NO_Z) == (int)VehicleFlag.NO_Z)
-                {
-                    m_flags |= (VehicleFlag.NO_Z);
-                }
-                if ((pParam & (int)VehicleFlag.LOCK_HOVER_HEIGHT) == (int)VehicleFlag.LOCK_HOVER_HEIGHT)
-                {
-                    m_Hoverflags |= (VehicleFlag.LOCK_HOVER_HEIGHT);
-                }
-                if ((pParam & (int)VehicleFlag.NO_DEFLECTION) == (int)VehicleFlag.NO_DEFLECTION)
-                {
-                    m_flags |= (VehicleFlag.NO_DEFLECTION);
-                }
-                if ((pParam & (int)VehicleFlag.LOCK_ROTATION) == (int)VehicleFlag.LOCK_ROTATION)
-                {
-                    m_flags |= (VehicleFlag.LOCK_ROTATION);
-                }
+            else {
+                m_flags |= parm;
             }
         }//end ProcessVehicleFlags
 
-        internal void ProcessTypeChange(Vehicle pType)
+        internal void ProcessTypeChange(Vehicle pType, float stepSize)
         {
-            DetailLog("{0},ProcessTypeChange,type={1}", m_prim.LocalID, pType);
+            VDetailLog("{0},ProcessTypeChange,type={1}", m_prim.LocalID, pType);
             // Set Defaults For Type
             m_type = pType;
             switch (pType)
@@ -478,10 +342,10 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                     // m_bankingMix = 1;
                     // m_bankingTimescale = 10;
                     // m_referenceFrame = Quaternion.Identity;
-                    m_Hoverflags &=
+                    m_flags |= (VehicleFlag.NO_DEFLECTION_UP | VehicleFlag.LIMIT_ROLL_ONLY | VehicleFlag.LIMIT_MOTOR_UP);
+                    m_flags &=
                          ~(VehicleFlag.HOVER_WATER_ONLY | VehicleFlag.HOVER_TERRAIN_ONLY |
                            VehicleFlag.HOVER_GLOBAL_HEIGHT | VehicleFlag.HOVER_UP_ONLY);
-                    m_flags |= (VehicleFlag.NO_DEFLECTION_UP | VehicleFlag.LIMIT_ROLL_ONLY | VehicleFlag.LIMIT_MOTOR_UP);
                     break;
                 case Vehicle.TYPE_CAR:
                     m_linearFrictionTimescale = new Vector3(100, 2, 1000);
@@ -506,10 +370,10 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                     // m_bankingMix = 1;
                     // m_bankingTimescale = 1;
                     // m_referenceFrame = Quaternion.Identity;
-                    m_Hoverflags &= ~(VehicleFlag.HOVER_WATER_ONLY | VehicleFlag.HOVER_TERRAIN_ONLY | VehicleFlag.HOVER_GLOBAL_HEIGHT);
                     m_flags |= (VehicleFlag.NO_DEFLECTION_UP | VehicleFlag.LIMIT_ROLL_ONLY |
                                 VehicleFlag.LIMIT_MOTOR_UP);
-                    m_Hoverflags |= (VehicleFlag.HOVER_UP_ONLY);
+                    m_flags &= ~(VehicleFlag.HOVER_WATER_ONLY | VehicleFlag.HOVER_TERRAIN_ONLY | VehicleFlag.HOVER_GLOBAL_HEIGHT);
+                    m_flags |= (VehicleFlag.HOVER_UP_ONLY);
                     break;
                 case Vehicle.TYPE_BOAT:
                     m_linearFrictionTimescale = new Vector3(10, 3, 2);
@@ -534,12 +398,12 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                     // m_bankingMix = 0.8f;
                     // m_bankingTimescale = 1;
                     // m_referenceFrame = Quaternion.Identity;
-                    m_Hoverflags &= ~(VehicleFlag.HOVER_TERRAIN_ONLY |
+                    m_flags &= ~(VehicleFlag.HOVER_TERRAIN_ONLY |
                             VehicleFlag.HOVER_GLOBAL_HEIGHT | VehicleFlag.HOVER_UP_ONLY);
                     m_flags &= ~(VehicleFlag.LIMIT_ROLL_ONLY);
                     m_flags |= (VehicleFlag.NO_DEFLECTION_UP |
                                 VehicleFlag.LIMIT_MOTOR_UP);
-                    m_Hoverflags |= (VehicleFlag.HOVER_WATER_ONLY);
+                    m_flags |= (VehicleFlag.HOVER_WATER_ONLY);
                     break;
                 case Vehicle.TYPE_AIRPLANE:
                     m_linearFrictionTimescale = new Vector3(200, 10, 5);
@@ -564,7 +428,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                     // m_bankingMix = 0.7f;
                     // m_bankingTimescale = 2;
                     // m_referenceFrame = Quaternion.Identity;
-                    m_Hoverflags &= ~(VehicleFlag.HOVER_WATER_ONLY | VehicleFlag.HOVER_TERRAIN_ONLY |
+                    m_flags &= ~(VehicleFlag.HOVER_WATER_ONLY | VehicleFlag.HOVER_TERRAIN_ONLY |
                         VehicleFlag.HOVER_GLOBAL_HEIGHT | VehicleFlag.HOVER_UP_ONLY);
                     m_flags &= ~(VehicleFlag.NO_DEFLECTION_UP | VehicleFlag.LIMIT_MOTOR_UP);
                     m_flags |= (VehicleFlag.LIMIT_ROLL_ONLY);
@@ -592,11 +456,11 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                     // m_bankingMix = 0.7f;
                     // m_bankingTimescale = 5;
                     // m_referenceFrame = Quaternion.Identity;
-                    m_Hoverflags &= ~(VehicleFlag.HOVER_WATER_ONLY | VehicleFlag.HOVER_TERRAIN_ONLY |
+                    m_flags &= ~(VehicleFlag.HOVER_WATER_ONLY | VehicleFlag.HOVER_TERRAIN_ONLY |
                         VehicleFlag.HOVER_UP_ONLY);
                     m_flags &= ~(VehicleFlag.NO_DEFLECTION_UP | VehicleFlag.LIMIT_MOTOR_UP);
                     m_flags |= (VehicleFlag.LIMIT_ROLL_ONLY);
-                    m_Hoverflags |= (VehicleFlag.HOVER_GLOBAL_HEIGHT);
+                    m_flags |= (VehicleFlag.HOVER_GLOBAL_HEIGHT);
                     break;
             }
         }//end SetDefaultsForType
@@ -613,7 +477,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
             MoveAngular(pTimestep);
             LimitRotation(pTimestep);
 
-            DetailLog("{0},BSDynamics.Step,done,pos={1},force={2},velocity={3},angvel={4}", 
+            VDetailLog("{0},BSDynamics.Step,done,pos={1},force={2},velocity={3},angvel={4}", 
                     m_prim.LocalID, m_prim.Position, m_prim.Force, m_prim.Velocity, m_prim.RotationalVelocity);
         }// end Step
 
@@ -657,7 +521,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
 
                  */
 
-                DetailLog("{0},MoveLinear,nonZero,origdir={1},origvel={2},add={3},decay={4},dir={5},vel={6}",
+                VDetailLog("{0},MoveLinear,nonZero,origdir={1},origvel={2},add={3},decay={4},dir={5},vel={6}",
                     m_prim.LocalID, origDir, origVel, addAmount, decayfraction, m_linearMotorDirection, m_lastLinearVelocityVector);
             }
             else
@@ -669,7 +533,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                 m_lastLinearVelocityVector = Vector3.Zero;
             }
 
-            // convert requested object velocity to world-referenced vector
+            // convert requested object velocity to object relative vector
             Quaternion rotq = m_prim.Orientation;
             m_dir = m_lastLinearVelocityVector * rotq;
 
@@ -722,7 +586,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                 if (changed)
                 {
                     m_prim.Position = pos;
-                    DetailLog("{0},MoveLinear,blockingEndPoint,block={1},origPos={2},pos={3}",
+                    VDetailLog("{0},MoveLinear,blockingEndPoint,block={1},origPos={2},pos={3}",
                                 m_prim.LocalID, m_BlockingEndPoint, posChange, pos);
                 }
             }
@@ -732,32 +596,32 @@ namespace OpenSim.Region.Physics.BulletSPlugin
             {
                 pos.Z = m_prim.Scene.GetTerrainHeightAtXYZ(pos) + 2;
                 m_prim.Position = pos;
-                DetailLog("{0},MoveLinear,terrainHeight,pos={1}", m_prim.LocalID, pos);
+                VDetailLog("{0},MoveLinear,terrainHeight,pos={1}", m_prim.LocalID, pos);
             }
 
             // Check if hovering
-            if ((m_Hoverflags & (VehicleFlag.HOVER_WATER_ONLY | VehicleFlag.HOVER_TERRAIN_ONLY | VehicleFlag.HOVER_GLOBAL_HEIGHT)) != 0)
+            if ((m_flags & (VehicleFlag.HOVER_WATER_ONLY | VehicleFlag.HOVER_TERRAIN_ONLY | VehicleFlag.HOVER_GLOBAL_HEIGHT)) != 0)
             {
                 // We should hover, get the target height
-                if ((m_Hoverflags & VehicleFlag.HOVER_WATER_ONLY) != 0)
+                if ((m_flags & VehicleFlag.HOVER_WATER_ONLY) != 0)
                 {
                     m_VhoverTargetHeight = m_prim.Scene.GetWaterLevel() + m_VhoverHeight;
                 }
-                if ((m_Hoverflags & VehicleFlag.HOVER_TERRAIN_ONLY) != 0)
+                if ((m_flags & VehicleFlag.HOVER_TERRAIN_ONLY) != 0)
                 {
                     m_VhoverTargetHeight = m_prim.Scene.GetTerrainHeightAtXY(pos.X, pos.Y) + m_VhoverHeight;
                 }
-                if ((m_Hoverflags & VehicleFlag.HOVER_GLOBAL_HEIGHT) != 0)
+                if ((m_flags & VehicleFlag.HOVER_GLOBAL_HEIGHT) != 0)
                 {
                     m_VhoverTargetHeight = m_VhoverHeight;
                 }
 
-                if ((m_Hoverflags & VehicleFlag.HOVER_UP_ONLY) != 0)
+                if ((m_flags & VehicleFlag.HOVER_UP_ONLY) != 0)
                 {
                     // If body is aready heigher, use its height as target height
                     if (pos.Z > m_VhoverTargetHeight) m_VhoverTargetHeight = pos.Z;
                 }
-                if ((m_Hoverflags & VehicleFlag.LOCK_HOVER_HEIGHT) != 0)
+                if ((m_flags & VehicleFlag.LOCK_HOVER_HEIGHT) != 0)
                 {
                     if ((pos.Z - m_VhoverTargetHeight) > .2 || (pos.Z - m_VhoverTargetHeight) < -.2)
                     {
@@ -779,7 +643,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                     }
                 }
 
-                DetailLog("{0},MoveLinear,hover,pos={1},dir={2},height={3},target={4}", m_prim.LocalID, pos, m_dir, m_VhoverHeight, m_VhoverTargetHeight);
+                VDetailLog("{0},MoveLinear,hover,pos={1},dir={2},height={3},target={4}", m_prim.LocalID, pos, m_dir, m_VhoverHeight, m_VhoverTargetHeight);
 
 //                m_VhoverEfficiency = 0f;    // 0=boucy, 1=Crit.damped
 //                m_VhoverTimescale = 0f;        // time to acheive height
@@ -815,7 +679,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                 {
                     grav.Z = (float)(grav.Z * 1.037125);
                 }
-                DetailLog("{0},MoveLinear,limitMotorUp,grav={1}", m_prim.LocalID, grav);
+                VDetailLog("{0},MoveLinear,limitMotorUp,grav={1}", m_prim.LocalID, grav);
                 //End Experimental Values
             }
             if ((m_flags & (VehicleFlag.NO_X)) != 0)
@@ -844,7 +708,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
             Vector3 decayamount = Vector3.One / (m_linearFrictionTimescale / pTimestep);
             m_lastLinearVelocityVector -= m_lastLinearVelocityVector * decayamount;
 
-            DetailLog("{0},MoveLinear,done,pos={1},vel={2},force={3},decay={4}", 
+            VDetailLog("{0},MoveLinear,done,pos={1},vel={2},force={3},decay={4}", 
                         m_prim.LocalID, m_lastPositionVector, m_dir, grav, decayamount);
 
         } // end MoveLinear()
@@ -870,13 +734,13 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                 // There are m_angularMotorApply steps.
                 Vector3 origAngularVelocity = m_angularMotorVelocity;
                 // ramp up to new value
-                //   current velocity  +=                         error                       /    (time to get there / step interval)
+                //   current velocity  +=                         error                            /    (time to get there / step interval)
                 //                               requested speed            -  last motor speed
                 m_angularMotorVelocity.X += (m_angularMotorDirection.X - m_angularMotorVelocity.X) /  (m_angularMotorTimescale / pTimestep);
                 m_angularMotorVelocity.Y += (m_angularMotorDirection.Y - m_angularMotorVelocity.Y) /  (m_angularMotorTimescale / pTimestep);
                 m_angularMotorVelocity.Z += (m_angularMotorDirection.Z - m_angularMotorVelocity.Z) /  (m_angularMotorTimescale / pTimestep);
 
-                DetailLog("{0},MoveAngular,angularMotorApply,apply={1},origvel={2},dir={3},vel={4}", 
+                VDetailLog("{0},MoveAngular,angularMotorApply,apply={1},origvel={2},dir={3},vel={4}", 
                         m_prim.LocalID,m_angularMotorApply,origAngularVelocity, m_angularMotorDirection, m_angularMotorVelocity);
 
                 m_angularMotorApply--;        // This is done so that if script request rate is less than phys frame rate the expected
@@ -887,6 +751,8 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                 // No motor recently applied, keep the body velocity
                 // and decay the velocity
                 m_angularMotorVelocity -= m_angularMotorVelocity /  (m_angularMotorDecayTimescale / pTimestep);
+                if (m_angularMotorVelocity.LengthSquared() < 0.00001)
+                    m_angularMotorVelocity = Vector3.Zero;
             } // end motor section
 
             // Vertical attractor section
@@ -924,7 +790,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                 vertattr.X += bounce * angularVelocity.X;
                 vertattr.Y += bounce * angularVelocity.Y;
 
-                DetailLog("{0},MoveAngular,verticalAttraction,verterr={1},bounce={2},vertattr={3}", 
+                VDetailLog("{0},MoveAngular,verticalAttraction,verterr={1},bounce={2},vertattr={3}", 
                             m_prim.LocalID, verterr, bounce, vertattr);
 
             } // else vertical attractor is off
@@ -942,13 +808,13 @@ namespace OpenSim.Region.Physics.BulletSPlugin
             {
                 m_lastAngularVelocity.X = 0;
                 m_lastAngularVelocity.Y = 0;
-                DetailLog("{0},MoveAngular,noDeflectionUp,lastAngular={1}", m_prim.LocalID, m_lastAngularVelocity);
+                VDetailLog("{0},MoveAngular,noDeflectionUp,lastAngular={1}", m_prim.LocalID, m_lastAngularVelocity);
             }
 
             if (m_lastAngularVelocity.ApproxEquals(Vector3.Zero, 0.01f))
             {
                 m_lastAngularVelocity = Vector3.Zero; // Reduce small value to zero.
-                DetailLog("{0},MoveAngular,zeroSmallValues,lastAngular={1}", m_prim.LocalID, m_lastAngularVelocity);
+                VDetailLog("{0},MoveAngular,zeroSmallValues,lastAngular={1}", m_prim.LocalID, m_lastAngularVelocity);
             }
 
              // apply friction
@@ -958,7 +824,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
             // Apply to the body
             m_prim.RotationalVelocity = m_lastAngularVelocity;
 
-            DetailLog("{0},MoveAngular,done,decay={1},lastAngular={2}", m_prim.LocalID, decayamount, m_lastAngularVelocity);
+            VDetailLog("{0},MoveAngular,done,decay={1},lastAngular={2}", m_prim.LocalID, decayamount, m_lastAngularVelocity);
         } //end MoveAngular
 
         internal void LimitRotation(float timestep)
@@ -1005,11 +871,11 @@ namespace OpenSim.Region.Physics.BulletSPlugin
             if (changed)
                 m_prim.Orientation = m_rot;
 
-            DetailLog("{0},LimitRotation,done,changed={1},orig={2},new={3}", m_prim.LocalID, changed, rotq, m_rot);
+            VDetailLog("{0},LimitRotation,done,changed={1},orig={2},new={3}", m_prim.LocalID, changed, rotq, m_rot);
         }
 
         // Invoke the detailed logger and output something if it's enabled.
-        private void DetailLog(string msg, params Object[] args)
+        private void VDetailLog(string msg, params Object[] args)
         {
             if (m_prim.Scene.VehicleLoggingEnabled)
                 m_prim.Scene.PhysicsLogging.Write(msg, args);
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSLinkset.cs b/OpenSim/Region/Physics/BulletSPlugin/BSLinkset.cs
index 1b3ba3f..9e3f0db 100755
--- a/OpenSim/Region/Physics/BulletSPlugin/BSLinkset.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSLinkset.cs
@@ -265,8 +265,7 @@ public class BSLinkset
             BSPrim childx = child;
             m_physicsScene.TaintedObject("AddChildToLinkset", delegate()
             {
-                // DebugLog("{0}: AddChildToLinkset: adding child {1} to {2}", LogHeader, child.LocalID, m_linksetRoot.LocalID);
-                // DetailLog("{0},AddChildToLinkset,taint,child={1}", m_linksetRoot.LocalID, child.LocalID);
+                DetailLog("{0},AddChildToLinkset,taint,child={1}", m_linksetRoot.LocalID, child.LocalID);
                 PhysicallyLinkAChildToRoot(rootx, childx);     // build the physical binding between me and the child
             });
         }
@@ -294,8 +293,7 @@ public class BSLinkset
             BSPrim childx = child;
             m_physicsScene.TaintedObject("RemoveChildFromLinkset", delegate()
             {
-                // DebugLog("{0}: RemoveChildFromLinkset: Removing constraint to {1}", LogHeader, child.LocalID);
-                // DetailLog("{0},RemoveChildFromLinkset,taint,child={1}", m_linksetRoot.LocalID, child.LocalID);
+                DetailLog("{0},RemoveChildFromLinkset,taint,child={1}", m_linksetRoot.LocalID, child.LocalID);
 
                 PhysicallyUnlinkAChildFromRoot(rootx, childx);
             });
@@ -326,7 +324,6 @@ public class BSLinkset
 
         // 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},PhysicallyLinkAChildToRoot,taint,root={1},child={2},rLoc={3},cLoc={4},midLoc={5}", 
             rootPrim.LocalID, rootPrim.LocalID, childPrim.LocalID, rootPrim.Position, childPrim.Position, midPoint);
         BS6DofConstraint constrain = new BS6DofConstraint(
@@ -335,10 +332,10 @@ public class BSLinkset
                         true,
                         true
                         );
-        /* NOTE: attempt to build constraint with full frame computation, etc.
+        /* NOTE: below is an attempt to build constraint with full frame computation, etc.
          *     Using the midpoint is easier since it lets the Bullet code use the transforms
          *     of the objects.
-         * Code left here as an example.
+         * Code left as a warning to future programmers.
         // ==================================================================================
         // relative position normalized to the root prim
         OMV.Quaternion invThisOrientation = OMV.Quaternion.Inverse(rootPrim.Orientation);
@@ -350,7 +347,6 @@ public class BSLinkset
 
         // 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},PhysicallyLinkAChildToRoot,taint,root={1},child={2}", rootPrim.LocalID, rootPrim.LocalID, childPrim.LocalID);
         BS6DofConstraint constrain = new BS6DofConstraint(
                         PhysicsScene.World, rootPrim.Body, childPrim.Body,
@@ -389,8 +385,6 @@ public class BSLinkset
     // Called at taint time!
     private void PhysicallyUnlinkAChildFromRoot(BSPrim rootPrim, BSPrim childPrim)
     {
-        // DebugLog("{0}: PhysicallyUnlinkAChildFromRoot: RemoveConstraint between root prim {1} and child prim {2}", 
-        //             LogHeader, rootPrim.LocalID, childPrim.LocalID);
         DetailLog("{0},PhysicallyUnlinkAChildFromRoot,taint,root={1},child={2}", rootPrim.LocalID, rootPrim.LocalID, childPrim.LocalID);
 
         // Find the constraint for this link and get rid of it from the overall collection and from my list
@@ -404,20 +398,12 @@ public class BSLinkset
     // Called at taint time!
     private void PhysicallyUnlinkAllChildrenFromRoot(BSPrim rootPrim)
     {
-        // DebugLog("{0}: PhysicallyUnlinkAllChildren:", LogHeader);
         DetailLog("{0},PhysicallyUnlinkAllChildren,taint", rootPrim.LocalID);
 
         m_physicsScene.Constraints.RemoveAndDestroyConstraint(rootPrim.Body);
     }
 
     // Invoke the detailed logger and output something if it's enabled.
-    private void DebugLog(string msg, params Object[] args)
-    {
-        if (m_physicsScene.ShouldDebugLog)
-            m_physicsScene.Logger.DebugFormat(msg, args);
-    }
-
-    // Invoke the detailed logger and output something if it's enabled.
     private void DetailLog(string msg, params Object[] args)
     {
         m_physicsScene.PhysicsLogging.Write(msg, args);
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs b/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
index c157669..a6bc8e2 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
@@ -42,8 +42,6 @@ public sealed class BSPrim : PhysicsActor
     private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
     private static readonly string LogHeader = "[BULLETS PRIM]";
 
-    private void DebugLog(string mm, params Object[] xx) { if (_scene.ShouldDebugLog) m_log.DebugFormat(mm, xx); }
-
     private IMesh _mesh;
     private PrimitiveBaseShape _pbs;
     private ShapeData.PhysicsShapeType _shapeType;
@@ -141,8 +139,8 @@ public sealed class BSPrim : PhysicsActor
         _friction = _scene.Params.defaultFriction;  // TODO: compute based on object material
         _density = _scene.Params.defaultDensity;    // TODO: compute based on object material
         _restitution = _scene.Params.defaultRestitution;
-        _linkset = new BSLinkset(_scene, this);     // a linkset of one
-        _vehicle = new BSDynamics(this);            // add vehicleness
+        _linkset = new BSLinkset(Scene, this);     // a linkset of one
+        _vehicle = new BSDynamics(Scene, this);            // add vehicleness
         _mass = CalculateMass();
         // do the actual object creation at taint time
         DetailLog("{0},BSPrim.constructor,call", LocalID);
@@ -193,7 +191,7 @@ public sealed class BSPrim : PhysicsActor
             {
                 _mass = CalculateMass();   // changing size changes the mass
                 BulletSimAPI.SetObjectScaleMass(_scene.WorldID, _localID, _scale, (IsPhysical ? _mass : 0f), IsPhysical);
-                // DetailLog("{0}: BSPrim.setSize: size={1}, mass={2}, physical={3}", LocalID, _size, _mass, IsPhysical);
+                DetailLog("{0}: BSPrim.setSize: size={1}, mass={2}, physical={3}", LocalID, _size, _mass, IsPhysical);
                 RecreateGeomAndObject();
             });
         } 
@@ -232,7 +230,6 @@ public sealed class BSPrim : PhysicsActor
         BSPrim parent = obj as BSPrim;
         if (parent != null)
         {
-            DebugLog("{0}: link {1}/{2} to {3}", LogHeader, _avName, _localID, parent.LocalID);
             BSPrim parentBefore = _linkset.LinksetRoot;
             int childrenBefore = _linkset.NumberOfChildren;
 
@@ -248,8 +245,6 @@ public sealed class BSPrim : PhysicsActor
     public override void delink() {
         // TODO: decide if this parent checking needs to happen at taint time
         // Race condition here: if link() and delink() in same simulation tick, the delink will not happen
-        DebugLog("{0}: delink {1}/{2}. Parent={3}", LogHeader, _avName, _localID, 
-                            _linkset.LinksetRoot._avName+"/"+_linkset.LinksetRoot.LocalID.ToString());
 
         BSPrim parentBefore = _linkset.LinksetRoot;
         int childrenBefore = _linkset.NumberOfChildren;
@@ -280,7 +275,7 @@ public sealed class BSPrim : PhysicsActor
 
     public override void LockAngularMotion(OMV.Vector3 axis)
     { 
-        // DetailLog("{0},BSPrim.LockAngularMotion,call,axis={1}", LocalID, axis);
+        DetailLog("{0},BSPrim.LockAngularMotion,call,axis={1}", LocalID, axis);
         return;
     }
 
@@ -299,7 +294,7 @@ public sealed class BSPrim : PhysicsActor
             // TODO: what does it mean to set the position of a child prim?? Rebuild the constraint?
             _scene.TaintedObject("BSPrim.setPosition", delegate()
             {
-                // DetailLog("{0},BSPrim.SetPosition,taint,pos={1},orient={2}", LocalID, _position, _orientation);
+                DetailLog("{0},BSPrim.SetPosition,taint,pos={1},orient={2}", LocalID, _position, _orientation);
                 BulletSimAPI.SetObjectTranslation(_scene.WorldID, _localID, _position, _orientation);
             });
         } 
@@ -336,7 +331,7 @@ public sealed class BSPrim : PhysicsActor
             _force = value;
             _scene.TaintedObject("BSPrim.setForce", delegate()
             {
-                // DetailLog("{0},BSPrim.setForce,taint,force={1}", LocalID, _force);
+                DetailLog("{0},BSPrim.setForce,taint,force={1}", LocalID, _force);
                 // BulletSimAPI.SetObjectForce(_scene.WorldID, _localID, _force);
                 BulletSimAPI.SetObjectForce2(Body.Ptr, _force);
             });
@@ -354,7 +349,7 @@ public sealed class BSPrim : PhysicsActor
             {
                 // Done at taint time so we're sure the physics engine is not using the variables
                 // Vehicle code changes the parameters for this vehicle type.
-                _vehicle.ProcessTypeChange(type);
+                _vehicle.ProcessTypeChange(type, Scene.LastSimulatedTimestep);
                 // Tell the scene about the vehicle so it will get processing each frame.
                 _scene.VehicleInSceneTypeChanged(this, type);
             });
@@ -414,7 +409,7 @@ public sealed class BSPrim : PhysicsActor
             _velocity = value;
             _scene.TaintedObject("BSPrim.setVelocity", delegate()
             {
-                // DetailLog("{0},BSPrim.SetVelocity,taint,vel={1}", LocalID, _velocity);
+                DetailLog("{0},BSPrim.SetVelocity,taint,vel={1}", LocalID, _velocity);
                 BulletSimAPI.SetObjectVelocity(_scene.WorldID, LocalID, _velocity);
             });
         } 
@@ -422,7 +417,7 @@ public sealed class BSPrim : PhysicsActor
     public override OMV.Vector3 Torque { 
         get { return _torque; } 
         set { _torque = value; 
-            // DetailLog("{0},BSPrim.SetTorque,call,torque={1}", LocalID, _torque);
+            DetailLog("{0},BSPrim.SetTorque,call,torque={1}", LocalID, _torque);
         } 
     }
     public override float CollisionScore { 
@@ -449,7 +444,7 @@ public sealed class BSPrim : PhysicsActor
             _scene.TaintedObject("BSPrim.setOrientation", delegate()
             {
                 // _position = BulletSimAPI.GetObjectPosition(_scene.WorldID, _localID);
-                // DetailLog("{0},BSPrim.setOrientation,taint,pos={1},orient={2}", LocalID, _position, _orientation);
+                DetailLog("{0},BSPrim.setOrientation,taint,pos={1},orient={2}", LocalID, _position, _orientation);
                 BulletSimAPI.SetObjectTranslation(_scene.WorldID, _localID, _position, _orientation);
             });
         } 
@@ -501,13 +496,15 @@ public sealed class BSPrim : PhysicsActor
         _linkset.Refresh(this);
 
         CollisionFlags cf = BulletSimAPI.GetCollisionFlags2(Body.Ptr);
-        // DetailLog("{0},BSPrim.SetObjectDynamic,taint,static={1},solid={2},mass={3}, cf={4}", LocalID, IsStatic, IsSolid, mass, cf);
+        DetailLog("{0},BSPrim.SetObjectDynamic,taint,static={1},solid={2},mass={3}, cf={4}", LocalID, IsStatic, IsSolid, mass, cf);
     }
 
     // prims don't fly
     public override bool Flying { 
         get { return _flying; } 
-        set { _flying = value; } 
+        set {
+            _flying = value;
+        } 
     }
     public override bool SetAlwaysRun { 
         get { return _setAlwaysRun; } 
@@ -558,7 +555,7 @@ public sealed class BSPrim : PhysicsActor
             // m_log.DebugFormat("{0}: RotationalVelocity={1}", LogHeader, _rotationalVelocity);
             _scene.TaintedObject("BSPrim.setRotationalVelocity", delegate()
             {
-                // DetailLog("{0},BSPrim.SetRotationalVel,taint,rotvel={1}", LocalID, _rotationalVelocity);
+                DetailLog("{0},BSPrim.SetRotationalVel,taint,rotvel={1}", LocalID, _rotationalVelocity);
                 BulletSimAPI.SetObjectAngularVelocity(_scene.WorldID, LocalID, _rotationalVelocity);
             });
         } 
@@ -575,7 +572,7 @@ public sealed class BSPrim : PhysicsActor
             _buoyancy = value;
             _scene.TaintedObject("BSPrim.setBuoyancy", delegate()
             {
-                // DetailLog("{0},BSPrim.SetBuoyancy,taint,buoy={1}", LocalID, _buoyancy);
+                DetailLog("{0},BSPrim.SetBuoyancy,taint,buoy={1}", LocalID, _buoyancy);
                 BulletSimAPI.SetObjectBuoyancy(_scene.WorldID, _localID, _buoyancy);
             });
         } 
@@ -638,17 +635,17 @@ public sealed class BSPrim : PhysicsActor
                 }
                 m_accumulatedForces.Clear();
             }
-            // DetailLog("{0},BSPrim.AddObjectForce,taint,force={1}", LocalID, _force);
+            DetailLog("{0},BSPrim.AddObjectForce,taint,force={1}", LocalID, _force);
             BulletSimAPI.AddObjectForce2(Body.Ptr, fSum);
         });
     }
 
     public override void AddAngularForce(OMV.Vector3 force, bool pushforce) { 
-        // DetailLog("{0},BSPrim.AddAngularForce,call,angForce={1},push={2}", LocalID, force, pushforce);
+        DetailLog("{0},BSPrim.AddAngularForce,call,angForce={1},push={2}", LocalID, force, pushforce);
         // m_log.DebugFormat("{0}: AddAngularForce. f={1}, push={2}", LogHeader, force, pushforce);
     }
     public override void SetMomentum(OMV.Vector3 momentum) { 
-        // DetailLog("{0},BSPrim.SetMomentum,call,mom={1}", LocalID, momentum);
+        DetailLog("{0},BSPrim.SetMomentum,call,mom={1}", LocalID, momentum);
     }
     public override void SubscribeEvents(int ms) { 
         _subscribedEventsMs = ms;
@@ -992,7 +989,7 @@ public sealed class BSPrim : PhysicsActor
                     // m_log.DebugFormat("{0}: CreateGeom: Defaulting to sphere of size {1}", LogHeader, _size);
                     if (forceRebuild || (_shapeType != ShapeData.PhysicsShapeType.SHAPE_SPHERE))
                     {
-                        // DetailLog("{0},BSPrim.CreateGeom,sphere (force={1}", LocalID, forceRebuild);
+                        DetailLog("{0},BSPrim.CreateGeom,sphere (force={1}", LocalID, forceRebuild);
                         _shapeType = ShapeData.PhysicsShapeType.SHAPE_SPHERE;
                         // Bullet native objects are scaled by the Bullet engine so pass the size in
                         _scale = _size;
@@ -1006,7 +1003,7 @@ public sealed class BSPrim : PhysicsActor
                 // m_log.DebugFormat("{0}: CreateGeom: Defaulting to box. lid={1}, type={2}, size={3}", LogHeader, LocalID, _shapeType, _size);
                 if (forceRebuild || (_shapeType != ShapeData.PhysicsShapeType.SHAPE_BOX))
                 {
-                    // DetailLog("{0},BSPrim.CreateGeom,box (force={1})", LocalID, forceRebuild);
+                    DetailLog("{0},BSPrim.CreateGeom,box (force={1})", LocalID, forceRebuild);
                     _shapeType = ShapeData.PhysicsShapeType.SHAPE_BOX;
                     _scale = _size;
                     // TODO: do we need to check for and destroy a mesh or hull that might have been left from before?
@@ -1042,19 +1039,26 @@ public sealed class BSPrim : PhysicsActor
     // No locking here because this is done when we know physics is not simulating
     private void CreateGeomMesh()
     {
-        float lod = _pbs.SculptEntry ? _scene.SculptLOD : _scene.MeshLOD;
+        // level of detail based on size and type of the object
+        float lod = _scene.MeshLOD;
+        if (_pbs.SculptEntry) 
+            lod = _scene.SculptLOD;
+        float maxAxis = Math.Max(_size.X, Math.Max(_size.Y, _size.Z));
+        if (maxAxis > _scene.MeshMegaPrimThreshold) 
+            lod = _scene.MeshMegaPrimLOD;
+
         ulong newMeshKey = (ulong)_pbs.GetMeshKey(_size, lod);
         // m_log.DebugFormat("{0}: CreateGeomMesh: lID={1}, oldKey={2}, newKey={3}", LogHeader, _localID, _meshKey, newMeshKey);
 
         // if this new shape is the same as last time, don't recreate the mesh
         if (_meshKey == newMeshKey) return;
 
-        // DetailLog("{0},BSPrim.CreateGeomMesh,create,key={1}", LocalID, newMeshKey);
+        DetailLog("{0},BSPrim.CreateGeomMesh,create,key={1}", LocalID, newMeshKey);
         // Since we're recreating new, get rid of any previously generated shape
         if (_meshKey != 0)
         {
             // m_log.DebugFormat("{0}: CreateGeom: deleting old mesh. lID={1}, Key={2}", LogHeader, _localID, _meshKey);
-            // DetailLog("{0},BSPrim.CreateGeomMesh,deleteOld,key={1}", LocalID, _meshKey);
+            DetailLog("{0},BSPrim.CreateGeomMesh,deleteOld,key={1}", LocalID, _meshKey);
             BulletSimAPI.DestroyMesh(_scene.WorldID, _meshKey);
             _mesh = null;
             _meshKey = 0;
@@ -1084,7 +1088,7 @@ public sealed class BSPrim : PhysicsActor
         _shapeType = ShapeData.PhysicsShapeType.SHAPE_MESH;
         // meshes are already scaled by the meshmerizer
         _scale = new OMV.Vector3(1f, 1f, 1f);
-        // DetailLog("{0},BSPrim.CreateGeomMesh,done", LocalID);
+        DetailLog("{0},BSPrim.CreateGeomMesh,done", LocalID);
         return;
     }
 
@@ -1098,13 +1102,13 @@ public sealed class BSPrim : PhysicsActor
         // if the hull hasn't changed, don't rebuild it
         if (newHullKey == _hullKey) return;
 
-        // DetailLog("{0},BSPrim.CreateGeomHull,create,oldKey={1},newKey={2}", LocalID, _hullKey, newHullKey);
+        DetailLog("{0},BSPrim.CreateGeomHull,create,oldKey={1},newKey={2}", LocalID, _hullKey, newHullKey);
         
         // Since we're recreating new, get rid of any previously generated shape
         if (_hullKey != 0)
         {
             // m_log.DebugFormat("{0}: CreateGeom: deleting old hull. Key={1}", LogHeader, _hullKey);
-            // DetailLog("{0},BSPrim.CreateGeomHull,deleteOldHull,key={1}", LocalID, _hullKey);
+            DetailLog("{0},BSPrim.CreateGeomHull,deleteOldHull,key={1}", LocalID, _hullKey);
             BulletSimAPI.DestroyHull(_scene.WorldID, _hullKey);
             _hullKey = 0;
         }
@@ -1198,7 +1202,7 @@ public sealed class BSPrim : PhysicsActor
         _shapeType = ShapeData.PhysicsShapeType.SHAPE_HULL;
         // meshes are already scaled by the meshmerizer
         _scale = new OMV.Vector3(1f, 1f, 1f);
-        // DetailLog("{0},BSPrim.CreateGeomHull,done", LocalID);
+        DetailLog("{0},BSPrim.CreateGeomHull,done", LocalID);
         return;
     }
 
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs b/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs
index 0a0e27e..56924aa 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs
@@ -73,7 +73,8 @@ public class BSScene : PhysicsScene, IPhysicsParameters
     private static readonly ILog m_log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
     private static readonly string LogHeader = "[BULLETS SCENE]";
 
-    public void DebugLog(string mm, params Object[] xx) { if (ShouldDebugLog) m_log.DebugFormat(mm, xx); }
+    // The name of the region we're working for.
+    public string RegionName { get; private set; }
 
     public string BulletSimVersion = "?";
 
@@ -101,16 +102,11 @@ public class BSScene : PhysicsScene, IPhysicsParameters
     private int m_detailedStatsStep = 0;
 
     public IMesher mesher;
-    private float m_meshLOD;
-    public float MeshLOD
-    {
-        get { return m_meshLOD; }
-    }
-    private float m_sculptLOD;
-    public float SculptLOD
-    {
-        get { return m_sculptLOD; }
-    }
+    // Level of Detail values kept as float because that's what the Meshmerizer wants
+    public float MeshLOD { get; private set; }
+    public float MeshMegaPrimLOD { get; private set; }
+    public float MeshMegaPrimThreshold { get; private set; }
+    public float SculptLOD { get; private set; }
 
     private BulletSim m_worldSim;
     public BulletSim World
@@ -185,8 +181,9 @@ public class BSScene : PhysicsScene, IPhysicsParameters
     ConfigurationParameters[] m_params;
     GCHandle m_paramsHandle;
 
-    public bool ShouldDebugLog { get; private set; }
-
+    // Handle to the callback used by the unmanaged code to call into the managed code.
+    // Used for debug logging.
+    // Need to store the handle in a persistant variable so it won't be freed.
     private BulletSimAPI.DebugLogCallback m_DebugLogCallbackHandle;
 
     // Sometimes you just have to log everything.
@@ -202,6 +199,8 @@ public class BSScene : PhysicsScene, IPhysicsParameters
     public BSScene(string identifier)
     {
         m_initialized = false;
+        // we are passed the name of the region we're working for.
+        RegionName = identifier;
     }
 
     public override void Initialise(IMesher meshmerizer, IConfigSource config)
@@ -287,10 +286,13 @@ public class BSScene : PhysicsScene, IPhysicsParameters
                 // Very detailed logging for physics debugging
                 m_physicsLoggingEnabled = pConfig.GetBoolean("PhysicsLoggingEnabled", false);
                 m_physicsLoggingDir = pConfig.GetString("PhysicsLoggingDir", ".");
-                m_physicsLoggingPrefix = pConfig.GetString("PhysicsLoggingPrefix", "physics-");
+                m_physicsLoggingPrefix = pConfig.GetString("PhysicsLoggingPrefix", "physics-%REGIONNAME%-");
                 m_physicsLoggingFileMinutes = pConfig.GetInt("PhysicsLoggingFileMinutes", 5);
                 // Very detailed logging for vehicle debugging
                 m_vehicleLoggingEnabled = pConfig.GetBoolean("VehicleLoggingEnabled", false);
+
+                // Do any replacements in the parameters
+                m_physicsLoggingPrefix = m_physicsLoggingPrefix.Replace("%REGIONNAME%", RegionName);
             }
         }
     }
@@ -368,7 +370,7 @@ public class BSScene : PhysicsScene, IPhysicsParameters
         BSPrim bsprim = prim as BSPrim;
         if (bsprim != null)
         {
-            // DetailLog("{0},RemovePrim,call", bsprim.LocalID);
+            DetailLog("{0},RemovePrim,call", bsprim.LocalID);
             // m_log.DebugFormat("{0}: RemovePrim. id={1}/{2}", LogHeader, bsprim.Name, bsprim.LocalID);
             try
             {
@@ -394,7 +396,7 @@ public class BSScene : PhysicsScene, IPhysicsParameters
 
         if (!m_initialized) return null;
 
-        // DetailLog("{0},AddPrimShape,call", localID);
+        DetailLog("{0},AddPrimShape,call", localID);
 
         BSPrim prim = new BSPrim(localID, primName, this, position, size, rotation, pbs, isPhysical);
         lock (m_prims) m_prims.Add(localID, prim);
@@ -540,7 +542,7 @@ public class BSScene : PhysicsScene, IPhysicsParameters
         else if (m_avatars.ContainsKey(collidingWith))
             type = ActorTypes.Agent;
 
-        DetailLog("{0},BSScene.SendCollision,collide,id={1},with={2}", DetailLogZero, localID, collidingWith);
+        // DetailLog("{0},BSScene.SendCollision,collide,id={1},with={2}", DetailLogZero, localID, collidingWith);
 
         BSPrim prim;
         if (m_prims.TryGetValue(localID, out prim)) {
@@ -905,16 +907,26 @@ public class BSScene : PhysicsScene, IPhysicsParameters
             (s) => { return s.NumericBool(s._forceSimplePrimMeshing); },
             (s,p,l,v) => { s._forceSimplePrimMeshing = s.BoolNumeric(v); } ),
 
-        new ParameterDefn("MeshLOD", "Level of detail to render meshes (32, 16, 8 or 4. 32=most detailed)",
+        new ParameterDefn("MeshLevelOfDetail", "Level of detail to render meshes (32, 16, 8 or 4. 32=most detailed)",
             8f,
-            (s,cf,p,v) => { s.m_meshLOD = cf.GetInt(p, (int)v); },
-            (s) => { return (float)s.m_meshLOD; },
-            (s,p,l,v) => { s.m_meshLOD = (int)v; } ),
-        new ParameterDefn("SculptLOD", "Level of detail to render sculpties (32, 16, 8 or 4. 32=most detailed)",
+            (s,cf,p,v) => { s.MeshLOD = (float)cf.GetInt(p, (int)v); },
+            (s) => { return s.MeshLOD; },
+            (s,p,l,v) => { s.MeshLOD = v; } ),
+        new ParameterDefn("MeshLevelOfDetailMegaPrim", "Level of detail to render meshes larger than threshold meters",
+            16f,
+            (s,cf,p,v) => { s.MeshMegaPrimLOD = (float)cf.GetInt(p, (int)v); },
+            (s) => { return s.MeshMegaPrimLOD; },
+            (s,p,l,v) => { s.MeshMegaPrimLOD = v; } ),
+        new ParameterDefn("MeshLevelOfDetailMegaPrimThreshold", "Size (in meters) of a mesh before using MeshMegaPrimLOD",
+            10f,
+            (s,cf,p,v) => { s.MeshMegaPrimThreshold = (float)cf.GetInt(p, (int)v); },
+            (s) => { return s.MeshMegaPrimThreshold; },
+            (s,p,l,v) => { s.MeshMegaPrimThreshold = v; } ),
+        new ParameterDefn("SculptLevelOfDetail", "Level of detail to render sculpties (32, 16, 8 or 4. 32=most detailed)",
             32f,
-            (s,cf,p,v) => { s.m_sculptLOD = cf.GetInt(p, (int)v); },
-            (s) => { return (float)s.m_sculptLOD; },
-            (s,p,l,v) => { s.m_sculptLOD = (int)v; } ),
+            (s,cf,p,v) => { s.SculptLOD = (float)cf.GetInt(p, (int)v); },
+            (s) => { return s.SculptLOD; },
+            (s,p,l,v) => { s.SculptLOD = v; } ),
 
         new ParameterDefn("MaxSubStep", "In simulation step, maximum number of substeps",
             10f,
@@ -1145,12 +1157,6 @@ public class BSScene : PhysicsScene, IPhysicsParameters
             (s,cf,p,v) => { s.m_detailedStatsStep = cf.GetInt(p, (int)v); },
             (s) => { return (float)s.m_detailedStatsStep; },
             (s,p,l,v) => { s.m_detailedStatsStep = (int)v; } ),
-        new ParameterDefn("ShouldDebugLog", "Enables detailed DEBUG log statements",
-            ConfigurationParameters.numericFalse,
-            (s,cf,p,v) => { s.ShouldDebugLog = cf.GetBoolean(p, s.BoolNumeric(v)); },
-            (s) => { return s.NumericBool(s.ShouldDebugLog); },
-            (s,p,l,v) => { s.ShouldDebugLog = s.BoolNumeric(v); } ),
-
     };
 
     // Convert a boolean to our numeric true and false values