remove a gc.collect that isn't very usefull (on the right engine this

time)

2 files changed, 2602 insertions, 1855 deletions

diff --git a/OpenSim/Region/PhysicsModules/Ode/OdeScene.cs b/OpenSim/Region/PhysicsModules/Ode/OdeScene.cs
index 410463c..ed2aad4 100644
--- a/OpenSim/Region/PhysicsModules/Ode/OdeScene.cs
+++ b/OpenSim/Region/PhysicsModules/Ode/OdeScene.cs
@@ -25,54 +25,52 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-// Revision 2011/12/13 by Ubit Umarov
-//#define SPAM
+// changes for varsize regions
+// note that raycasts need to have limited range
+// (even in normal regions)
+// or application thread stack may just blowup
+// see RayCast(ODERayCastRequest req)
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
 using System.Linq;
 using System.Reflection;
+using System.Runtime.ExceptionServices;
 using System.Runtime.InteropServices;
 using System.Threading;
-using System.IO;
-using System.Diagnostics;
 using log4net;
 using Nini.Config;
 using Mono.Addins;
-using OdeAPI;
+using OpenMetaverse;
 using OpenSim.Framework;
+using OpenSim.Region.PhysicsModules.SharedBase;
 using OpenSim.Region.Framework.Scenes;
 using OpenSim.Region.Framework.Interfaces;
-using OpenSim.Region.PhysicsModules.SharedBase;
-using OpenMetaverse;
 
-namespace OpenSim.Region.PhysicsModule.ubOde
+namespace OpenSim.Region.PhysicsModule.ODE
 {
-     // colision flags of things others can colide with
-    // rays, sensors, probes removed since can't  be colided with
-    // The top space where things are placed provided further selection
-    // ie physical are in active space nonphysical in static
-    // this should be exclusive as possible
+    public enum StatusIndicators : int
+    {
+        Generic = 0,
+        Start = 1,
+        End = 2
+    }
 
     [Flags]
-    public enum CollisionCategories : uint
+    public enum CollisionCategories : int
     {
         Disabled = 0,
-        //by 'things' types
-        Space =         0x01,
-        Geom =          0x02, // aka prim/part
-        Character =     0x04,
-        Land =          0x08,
-        Water =         0x010,
-
-        // by state
-        Phantom =       0x01000,
-        VolumeDtc =     0x02000,
-        Selected =      0x04000,
-        NoShape =       0x08000,
-
-
-        All =           0xffffffff
+        Geom = 0x00000001,
+        Body = 0x00000002,
+        Space = 0x00000004,
+        Character = 0x00000008,
+        Land = 0x00000010,
+        Water = 0x00000020,
+        Wind = 0x00000040,
+        Sensor = 0x00000080,
+        Selected = 0x00000100
     }
 
     /// <summary>
@@ -93,579 +91,836 @@ namespace OpenSim.Region.PhysicsModule.ubOde
         /// <summary></summary>
         Plastic = 5,
         /// <summary></summary>
-        Rubber = 6,
-
-        light = 7 // compatibility with old viewers
-    }
-    
-    public enum changes : int
-    {
-        Add = 0,                // arg null. finishs the prim creation. should be used internally only ( to remove later ?)
-        Remove,
-        Link,               // arg AuroraODEPrim new parent prim or null to delink. Makes the prim part of a object with prim parent as root
-        //  or removes from a object if arg is null
-        DeLink,
-        Position,           // arg Vector3 new position in world coords. Changes prim position. Prim must know if it is root or child
-        Orientation,        // arg Quaternion new orientation in world coords. Changes prim position. Prim must know it it is root or child
-        PosOffset,          // not in use
-        // arg Vector3 new position in local coords. Changes prim position in object
-        OriOffset,          // not in use
-        // arg Vector3 new position in local coords. Changes prim position in object
-        Velocity,
-        TargetVelocity,
-        AngVelocity,
-        Acceleration,
-        Force,
-        Torque,
-        Momentum,
-
-        AddForce,
-        AddAngForce,
-        AngLock,
-
-        Buoyancy,
-
-        PIDTarget,
-        PIDTau,
-        PIDActive,
-
-        PIDHoverHeight,
-        PIDHoverType,
-        PIDHoverTau,
-        PIDHoverActive,
-
-        Size,
-        AvatarSize,
-        Shape,
-        PhysRepData,
-        AddPhysRep,
-
-        CollidesWater,
-        VolumeDtc,
-
-        Physical,
-        Phantom,
-        Selected,
-        disabled,
-        building,
-
-        VehicleType,
-        VehicleFloatParam,
-        VehicleVectorParam,
-        VehicleRotationParam,
-        VehicleFlags,
-        SetVehicle,
-
-        Null             //keep this last used do dim the methods array. does nothing but pulsing the prim
+        Rubber = 6
     }
 
-    public struct ODEchangeitem
+    public class OdeScene : PhysicsScene
     {
-        public PhysicsActor actor;
-        public OdeCharacter character;
-        public changes what;
-        public Object arg;
-    }
+        private readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType.ToString());
 
-    public class ODEScene : PhysicsScene
-    {
-        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+        // private Dictionary<string, sCollisionData> m_storedCollisions = new Dictionary<string, sCollisionData>();
 
-        public bool m_OSOdeLib = false;
-        public Scene m_frameWorkScene = null;
+        /// <summary>
+        /// Provide a sync object so that only one thread calls d.Collide() at a time across all OdeScene instances.
+        /// </summary>
+        /// <remarks>
+        /// With ODE as of r1755 (though also tested on r1860), only one thread can call d.Collide() at a
+        /// time, even where physics objects are in entirely different ODE worlds.  This is because generating contacts
+        /// uses a static cache at the ODE level.
+        ///
+        /// Without locking, simulators running multiple regions will eventually crash with a native stack trace similar
+        /// to
+        ///
+        /// mono() [0x489171]
+        /// mono() [0x4d154f]
+        /// /lib/x86_64-linux-gnu/libpthread.so.0(+0xfc60) [0x7f6ded592c60]
+        /// .../opensim/bin/libode-x86_64.so(_ZN6Opcode11OBBCollider8_CollideEPKNS_14AABBNoLeafNodeE+0xd7a) [0x7f6dd822628a]
+        ///
+        /// ODE provides an experimental option to cache in thread local storage but compiling ODE with this option
+        /// causes OpenSimulator to immediately crash with a native stack trace similar to
+        ///
+        /// mono() [0x489171]
+        /// mono() [0x4d154f]
+        /// /lib/x86_64-linux-gnu/libpthread.so.0(+0xfc60) [0x7f03c9849c60]
+        /// .../opensim/bin/libode-x86_64.so(_Z12dCollideCCTLP6dxGeomS0_iP12dContactGeomi+0x92) [0x7f03b44bcf82]
+        /// </remarks>
+        internal static Object UniversalColliderSyncObject = new Object();
+        internal static Object SimulationLock = new Object();
+        
+        /// <summary>
+        /// Is stats collecting enabled for this ODE scene?
+        /// </summary>
+        public bool CollectStats { get; set; }
 
-//        private int threadid = 0;
+        /// <summary>
+        /// Statistics for this scene.
+        /// </summary>
+        private Dictionary<string, float> m_stats = new Dictionary<string, float>();
 
-//        const d.ContactFlags comumContactFlags = d.ContactFlags.SoftERP | d.ContactFlags.SoftCFM |d.ContactFlags.Approx1 | d.ContactFlags.Bounce;
+        /// <summary>
+        /// Stat name for total number of avatars in this ODE scene.
+        /// </summary>
+        public const string ODETotalAvatarsStatName = "ODETotalAvatars";
 
-        const d.ContactFlags comumContactFlags = d.ContactFlags.Bounce | d.ContactFlags.Approx1 | d.ContactFlags.Slip1 | d.ContactFlags.Slip2;
-        const float comumContactERP = 0.75f;
-        const float comumContactCFM = 0.0001f;
-        const float comumContactSLIP = 0f;
-        
-        float frictionMovementMult = 0.8f;
+        /// <summary>
+        /// Stat name for total number of prims in this ODE scene.
+        /// </summary>
+        public const string ODETotalPrimsStatName = "ODETotalPrims";
+
+        /// <summary>
+        /// Stat name for total number of prims with active physics in this ODE scene.
+        /// </summary>
+        public const string ODEActivePrimsStatName = "ODEActivePrims";
+
+        /// <summary>
+        /// Stat name for the total time spent in ODE frame processing.
+        /// </summary>
+        /// <remarks>
+        /// A sanity check for the main scene loop physics time.
+        /// </remarks>
+        public const string ODETotalFrameMsStatName = "ODETotalFrameMS";
+
+        /// <summary>
+        /// Stat name for time spent processing avatar taints per frame
+        /// </summary>
+        public const string ODEAvatarTaintMsStatName = "ODEAvatarTaintFrameMS";
+
+        /// <summary>
+        /// Stat name for time spent processing prim taints per frame
+        /// </summary>
+        public const string ODEPrimTaintMsStatName = "ODEPrimTaintFrameMS";
+
+        /// <summary>
+        /// Stat name for time spent calculating avatar forces per frame.
+        /// </summary>
+        public const string ODEAvatarForcesFrameMsStatName = "ODEAvatarForcesFrameMS";
+
+        /// <summary>
+        /// Stat name for time spent calculating prim forces per frame
+        /// </summary>
+        public const string ODEPrimForcesFrameMsStatName = "ODEPrimForcesFrameMS";
+
+        /// <summary>
+        /// Stat name for time spent fulfilling raycasting requests per frame
+        /// </summary>
+        public const string ODERaycastingFrameMsStatName = "ODERaycastingFrameMS";
+
+        /// <summary>
+        /// Stat name for time spent in native code that actually steps through the simulation.
+        /// </summary>
+        public const string ODENativeStepFrameMsStatName = "ODENativeStepFrameMS";
+
+        /// <summary>
+        /// Stat name for the number of milliseconds that ODE spends in native space collision code.
+        /// </summary>
+        public const string ODENativeSpaceCollisionFrameMsStatName = "ODENativeSpaceCollisionFrameMS";
+
+        /// <summary>
+        /// Stat name for milliseconds that ODE spends in native geom collision code.
+        /// </summary>
+        public const string ODENativeGeomCollisionFrameMsStatName = "ODENativeGeomCollisionFrameMS";
+
+        /// <summary>
+        /// Time spent in collision processing that is not spent in native space or geom collision code.
+        /// </summary>
+        public const string ODEOtherCollisionFrameMsStatName = "ODEOtherCollisionFrameMS";
+
+        /// <summary>
+        /// Stat name for time spent notifying listeners of collisions
+        /// </summary>
+        public const string ODECollisionNotificationFrameMsStatName = "ODECollisionNotificationFrameMS";
+
+        /// <summary>
+        /// Stat name for milliseconds spent updating avatar position and velocity
+        /// </summary>
+        public const string ODEAvatarUpdateFrameMsStatName = "ODEAvatarUpdateFrameMS";
+
+        /// <summary>
+        /// Stat name for the milliseconds spent updating prim position and velocity
+        /// </summary>
+        public const string ODEPrimUpdateFrameMsStatName = "ODEPrimUpdateFrameMS";
+
+        /// <summary>
+        /// Stat name for avatar collisions with another entity.
+        /// </summary>
+        public const string ODEAvatarContactsStatsName = "ODEAvatarContacts";
+
+        /// <summary>
+        /// Stat name for prim collisions with another entity.
+        /// </summary>
+        public const string ODEPrimContactsStatName = "ODEPrimContacts";
+
+        /// <summary>
+        /// Used to hold tick numbers for stat collection purposes.
+        /// </summary>
+        private int m_nativeCollisionStartTick;
+
+        /// <summary>
+        /// A messy way to tell if we need to avoid adding a collision time because this was already done in the callback.
+        /// </summary>
+        private bool m_inCollisionTiming;
+
+        /// <summary>
+        /// A temporary holder for the number of avatar collisions in a frame, so we can work out how many object
+        /// collisions occured using the _perloopcontact if stats collection is enabled.
+        /// </summary>
+        private int m_tempAvatarCollisionsThisFrame;
+
+        /// <summary>
+        /// Used in calculating physics frame time dilation
+        /// </summary>
+        private int tickCountFrameRun;
 
-        float TerrainBounce = 0.1f;
-        float TerrainFriction = 0.3f;
+        /// <summary>
+        /// Used in calculating physics frame time dilation
+        /// </summary>
+        private int latertickcount;
 
-        public float AvatarFriction = 0;// 0.9f * 0.5f;
+        private Random fluidRandomizer = new Random(Environment.TickCount);
 
-        // this netx dimensions are only relevant for terrain partition (mega regions)
-        // WorldExtents below has the simulation dimensions
-        // they should be identical except on mega regions
         private uint m_regionWidth = Constants.RegionSize;
         private uint m_regionHeight = Constants.RegionSize;
 
-        public float ODE_STEPSIZE = 0.020f;
-        public float HalfOdeStep = 0.01f;
-        public int odetimestepMS = 20; // rounded
-        private float metersInSpace = 25.6f;
+        private float ODE_STEPSIZE = 0.0178f;
+        private float metersInSpace = 29.9f;
         private float m_timeDilation = 1.0f;
 
-        private DateTime m_lastframe;
-        private DateTime m_lastMeshExpire;
-
         public float gravityx = 0f;
         public float gravityy = 0f;
         public float gravityz = -9.8f;
 
+        public float AvatarTerminalVelocity { get; set; }
+
+        private float contactsurfacelayer = 0.001f;
+
+        private int HashspaceLow = -5;
+        private int HashspaceHigh = 12;
+
         private float waterlevel = 0f;
         private int framecount = 0;
+        //private int m_returncollisions = 10;
+
+        private IntPtr contactgroup;
+
+//        internal IntPtr WaterGeom;
+
+        private float nmTerrainContactFriction = 255.0f;
+        private float nmTerrainContactBounce = 0.1f;
+        private float nmTerrainContactERP = 0.1025f;
+
+        private float mTerrainContactFriction = 75f;
+        private float mTerrainContactBounce = 0.1f;
+        private float mTerrainContactERP = 0.05025f;
+
+        private float nmAvatarObjectContactFriction = 250f;
+        private float nmAvatarObjectContactBounce = 0.1f;
+
+        private float mAvatarObjectContactFriction = 75f;
+        private float mAvatarObjectContactBounce = 0.1f;
+
+        private float avPIDD = 3200f;
+        private float avPIDP = 1400f;
+        private float avCapRadius = 0.37f;
+        private float avStandupTensor = 2000000f;
+
+        /// <summary>
+        /// true = old compatibility mode with leaning capsule; false = new corrected mode
+        /// </summary>
+        /// <remarks>
+        /// Even when set to false, the capsule still tilts but this is done in a different way.
+        /// </remarks>
+        public bool IsAvCapsuleTilted { get; private set; }
 
         private float avDensity = 80f;
         private float avMovementDivisorWalk = 1.3f;
         private float avMovementDivisorRun = 0.8f;
         private float minimumGroundFlightOffset = 3f;
         public float maximumMassObject = 10000.01f;
-        public float geomDefaultDensity = 10.0f;
 
-        public float maximumAngularVelocity = 12.0f; // default 12rad/s
-        public float maxAngVelocitySQ = 144f;   // squared value
+        public bool meshSculptedPrim = true;
+        public bool forceSimplePrimMeshing = false;
+
+        public float meshSculptLOD = 32;
+        public float MeshSculptphysicalLOD = 16;
+
+        public float geomDefaultDensity = 10.000006836f;
+
+        public int geomContactPointsStartthrottle = 3;
+        public int geomUpdatesPerThrottledUpdate = 15;
+        private const int avatarExpectedContacts = 3;
 
         public float bodyPIDD = 35f;
         public float bodyPIDG = 25;
 
-        public int bodyFramesAutoDisable = 5;
+        public int bodyFramesAutoDisable = 20;
+
+        private bool m_filterCollisions = true;
 
         private d.NearCallback nearCallback;
+        public d.TriCallback triCallback;
+        public d.TriArrayCallback triArrayCallback;
 
-        private Dictionary<uint,OdePrim> _prims = new Dictionary<uint,OdePrim>();
-        private HashSet<OdeCharacter> _characters = new HashSet<OdeCharacter>();
-        private HashSet<OdePrim> _activeprims = new HashSet<OdePrim>();
-        private HashSet<OdePrim> _activegroups = new HashSet<OdePrim>();
+        /// <summary>
+        /// Avatars in the physics scene.
+        /// </summary>
+        private readonly HashSet<OdeCharacter> _characters = new HashSet<OdeCharacter>();
 
-        public OpenSim.Framework.LocklessQueue<ODEchangeitem> ChangesQueue = new OpenSim.Framework.LocklessQueue<ODEchangeitem>();
+        /// <summary>
+        /// Prims in the physics scene.
+        /// </summary>
+        private readonly HashSet<OdePrim> _prims = new HashSet<OdePrim>();
 
         /// <summary>
-        /// A list of actors that should receive collision events.
+        /// Prims in the physics scene that are subject to physics, not just collisions.
         /// </summary>
-        private List<PhysicsActor> _collisionEventPrim = new List<PhysicsActor>();
-        private List<PhysicsActor> _collisionEventPrimRemove = new List<PhysicsActor>();
-        
-        private HashSet<OdeCharacter> _badCharacter = new HashSet<OdeCharacter>();
+        private readonly HashSet<OdePrim> _activeprims = new HashSet<OdePrim>();
+
+        /// <summary>
+        /// Prims that the simulator has created/deleted/updated and so need updating in ODE.
+        /// </summary>
+        private readonly HashSet<OdePrim> _taintedPrims = new HashSet<OdePrim>();
+
+        /// <summary>
+        /// Record a character that has taints to be processed.
+        /// </summary>
+        private readonly HashSet<OdeCharacter> _taintedActors = new HashSet<OdeCharacter>();
+
+        /// <summary>
+        /// Keep record of contacts in the physics loop so that we can remove duplicates.
+        /// </summary>
+        private readonly List<d.ContactGeom> _perloopContact = new List<d.ContactGeom>();
+
+        /// <summary>
+        /// A dictionary of actors that should receive collision events.
+        /// </summary>
+        private readonly Dictionary<uint, PhysicsActor> m_collisionEventActors = new Dictionary<uint, PhysicsActor>();
+
+        /// <summary>
+        /// A dictionary of collision event changes that are waiting to be processed.
+        /// </summary>
+        private readonly Dictionary<uint, PhysicsActor> m_collisionEventActorsChanges = new Dictionary<uint, PhysicsActor>();
+
+        /// <summary>
+        /// Maps a unique geometry id (a memory location) to a physics actor name.
+        /// </summary>
+        /// <remarks>
+        /// Only actors participating in collisions have geometries.  This has to be maintained separately from
+        /// actor_name_map because terrain and water currently don't conceptually have a physics actor of their own
+        /// apart from the singleton PANull
+        /// </remarks>
+        public Dictionary<IntPtr, String> geom_name_map = new Dictionary<IntPtr, String>();
+
+        /// <summary>
+        /// Maps a unique geometry id (a memory location) to a physics actor.
+        /// </summary>
+        /// <remarks>
+        /// Only actors participating in collisions have geometries.
+        /// </remarks>
         public Dictionary<IntPtr, PhysicsActor> actor_name_map = new Dictionary<IntPtr, PhysicsActor>();
 
-        private float contactsurfacelayer = 0.002f;
+        /// <summary>
+        /// Defects list to remove characters that no longer have finite positions due to some other bug.
+        /// </summary>
+        /// <remarks>
+        /// Used repeatedly in Simulate() but initialized once here.
+        /// </remarks>
+        private readonly List<OdeCharacter> defects = new List<OdeCharacter>();
 
-        private int contactsPerCollision = 80;
-        internal IntPtr ContactgeomsArray = IntPtr.Zero;
-        private IntPtr GlobalContactsArray = IntPtr.Zero;
-        private d.Contact SharedTmpcontact = new d.Contact();
+        private bool m_NINJA_physics_joints_enabled = false;
+        //private Dictionary<String, IntPtr> jointpart_name_map = new Dictionary<String,IntPtr>();
+        private readonly Dictionary<String, List<PhysicsJoint>> joints_connecting_actor = new Dictionary<String, List<PhysicsJoint>>();
+        private d.ContactGeom[] contacts;
 
-        const int maxContactsbeforedeath = 6000;
-        private volatile int m_global_contactcount = 0;
+        /// <summary>
+        /// Lock only briefly. accessed by external code (to request new joints) and by OdeScene.Simulate() to move those joints into pending/active
+        /// </summary>
+        private readonly List<PhysicsJoint> requestedJointsToBeCreated = new List<PhysicsJoint>();
 
-        private IntPtr contactgroup;
+        /// <summary>
+        /// can lock for longer. accessed only by OdeScene.
+        /// </summary>
+        private readonly List<PhysicsJoint> pendingJoints = new List<PhysicsJoint>();
 
-        public ContactData[] m_materialContactsData = new ContactData[8];
+        /// <summary>
+        /// can lock for longer. accessed only by OdeScene.
+        /// </summary>
+        private readonly List<PhysicsJoint> activeJoints = new List<PhysicsJoint>();
 
-        private IntPtr TerrainGeom;
-        private float[] TerrainHeightFieldHeight;
-        private GCHandle TerrainHeightFieldHeightsHandler = new GCHandle();
-       
-        private int m_physicsiterations = 15;
+        /// <summary>
+        /// lock only briefly. accessed by external code (to request deletion of joints) and by OdeScene.Simulate() to move those joints out of pending/active
+        /// </summary>
+        private readonly List<string> requestedJointsToBeDeleted = new List<string>();
+
+        private Object externalJointRequestsLock = new Object();
+        private readonly Dictionary<String, PhysicsJoint> SOPName_to_activeJoint = new Dictionary<String, PhysicsJoint>();
+        private readonly Dictionary<String, PhysicsJoint> SOPName_to_pendingJoint = new Dictionary<String, PhysicsJoint>();
+        private readonly DoubleDictionary<Vector3, IntPtr, IntPtr> RegionTerrain = new DoubleDictionary<Vector3, IntPtr, IntPtr>();
+        private readonly Dictionary<IntPtr,float[]> TerrainHeightFieldHeights = new Dictionary<IntPtr, float[]>();
+
+        private d.Contact contact;
+        private d.Contact TerrainContact;
+        private d.Contact AvatarMovementprimContact;
+        private d.Contact AvatarMovementTerrainContact;
+        private d.Contact WaterContact;
+        private d.Contact[,] m_materialContacts;
+
+        private int m_physicsiterations = 10;
         private const float m_SkipFramesAtms = 0.40f; // Drop frames gracefully at a 400 ms lag
-//        private PhysicsActor PANull = new NullPhysicsActor();
+        private readonly PhysicsActor PANull = new NullPhysicsActor();
         private float step_time = 0.0f;
-
         public IntPtr world;
+        private uint obj2LocalID = 0;
+        private OdeCharacter cc1;
+        private OdePrim cp1;
+        private OdeCharacter cc2;
+        private OdePrim cp2;
+        private int p1ExpectedPoints = 0;
+        private int p2ExpectedPoints = 0;
 
-        // split the spaces acording to contents type
-        // ActiveSpace contains characters and active prims
-        // StaticSpace contains land and other that is mostly static in enviroment
-        // this can contain subspaces, like the grid in staticspace
-        // as now space only contains this 2 top spaces
-
-        public IntPtr TopSpace; // the global space
-        public IntPtr ActiveSpace; // space for active prims
-        public IntPtr CharsSpace; // space for active prims
-        public IntPtr StaticSpace; // space for the static things around
-        public IntPtr GroundSpace; // space for ground
+        public IntPtr space;
 
-        // some speedup variables
-        private int spaceGridMaxX;
-        private int spaceGridMaxY;
-        private float spacesPerMeterX;
-        private float spacesPerMeterY;
+        // split static geometry collision handling into spaces of 30 meters
+        public IntPtr[,] staticPrimspace;
 
-        // split static geometry collision into a grid as before
-        private IntPtr[,] staticPrimspace;
-        private IntPtr[] staticPrimspaceOffRegion;
+        /// <summary>
+        /// Used to lock the entire physics scene.  Locked during the main part of Simulate()
+        /// </summary>
+        internal Object OdeLock = new Object();
 
-        public Object OdeLock;
-        public static Object SimulationLock;
+        private bool _worldInitialized = false;
 
         public IMesher mesher;
 
-        public IConfigSource m_config;
+        private IConfigSource m_config;
 
         public bool physics_logging = false;
         public int physics_logging_interval = 0;
         public bool physics_logging_append_existing_logfile = false;
 
-        public Vector2 WorldExtents = new Vector2((int)Constants.RegionSize, (int)Constants.RegionSize);
+        private bool avplanted = false;
+        private bool av_av_collisions_off = false;
 
-        private ODERayCastRequestManager m_rayCastManager;
-        public ODEMeshWorker m_meshWorker;
+        public d.Vector3 xyz = new d.Vector3(128.1640f, 128.3079f, 25.7600f);
+        public d.Vector3 hpr = new d.Vector3(125.5000f, -17.0000f, 0.0000f);
 
-        /* maybe needed if ode uses tls
-                private void checkThread()
-                {
+        private volatile int m_global_contactcount = 0;
 
-                    int th = Thread.CurrentThread.ManagedThreadId;
-                    if(th != threadid)
-                    {
-                        threadid = th;
-                        d.AllocateODEDataForThread(~0U);
-                    }
-                }
-         */
+        private Vector3 m_worldOffset = Vector3.Zero;
+        public Vector2 WorldExtents = new Vector2((int)Constants.RegionSize, (int)Constants.RegionSize);
+        private PhysicsScene m_parentScene = null;
 
-        IConfig physicsconfig = null;
+        float spacesPerMeterX;
+        float spacesPerMeterY;
+        int spaceGridMaxX;
+        int spaceGridMaxY;
 
-        public ODEScene(Scene pscene, IConfigSource psourceconfig, string pname, string pversion, bool pOSOdeLib)
-        {
-            OdeLock = new Object();
+        private ODERayCastRequestManager m_rayCastManager;
+        
+                public Scene m_frameWorkScene = null;
 
+        public OdeScene(Scene pscene, IConfigSource psourceconfig, string pname, string pversion)
+                {
+                        m_config = psourceconfig;
+                        m_frameWorkScene = pscene;
+                        
             EngineType = pname;
             PhysicsSceneName = EngineType + "/" + pscene.RegionInfo.RegionName;
             EngineName = pname + " " + pversion;
-                        m_config = psourceconfig;
-            m_OSOdeLib = pOSOdeLib;
-
-//            m_OSOdeLib = false; //debug
-
-            m_frameWorkScene = pscene;
 
-            m_frameWorkScene.RegisterModuleInterface<PhysicsScene>(this);
+            pscene.RegisterModuleInterface<PhysicsScene>(this);
+            Vector3 extent = new Vector3(pscene.RegionInfo.RegionSizeX, pscene.RegionInfo.RegionSizeY, pscene.RegionInfo.RegionSizeZ);
+            Initialise(extent);
+            InitialiseFromConfig(m_config);
 
-            Initialization();
+            // This may not be that good since terrain may not be avaiable at this point
+            base.Initialise(pscene.PhysicsRequestAsset, 
+                (pscene.Heightmap != null ? pscene.Heightmap.GetFloatsSerialised() : new float[(int)(extent.X * extent.Y)]), 
+                (float)pscene.RegionInfo.RegionSettings.WaterHeight);
 
-            base.Initialise(m_frameWorkScene.PhysicsRequestAsset,
-                (m_frameWorkScene.Heightmap != null ? m_frameWorkScene.Heightmap.GetFloatsSerialised() : new float[m_frameWorkScene.RegionInfo.RegionSizeX * m_frameWorkScene.RegionInfo.RegionSizeY]),
-                (float)m_frameWorkScene.RegionInfo.RegionSettings.WaterHeight);           
         }
 
-        public void RegionLoaded()
+         public void RegionLoaded()
         {
             mesher = m_frameWorkScene.RequestModuleInterface<IMesher>();
             if (mesher == null)
-            {
-                m_log.ErrorFormat("[ubOde] No mesher. module disabled");
-                return;
-            }
-            
-            m_meshWorker = new ODEMeshWorker(this, m_log, mesher, physicsconfig);
-            m_frameWorkScene.PhysicsEnabled = true;
+                m_log.WarnFormat("[ODE SCENE]: No mesher in {0}. Things will not work well.", PhysicsSceneName);
+                                
+                        m_frameWorkScene.PhysicsEnabled = true;                         
         }
+
         /// <summary>
         /// Initiailizes the scene
         /// Sets many properties that ODE requires to be stable
         /// These settings need to be tweaked 'exactly' right or weird stuff happens.
         /// </summary>
-        private void Initialization()
+        private void Initialise(Vector3 regionExtent)
         {
-            d.AllocateODEDataForThread(~0U);
-
-            SimulationLock = new Object();
-
+                        WorldExtents.X = regionExtent.X;
+            m_regionWidth = (uint)regionExtent.X;
+            WorldExtents.Y = regionExtent.Y;
+            m_regionHeight = (uint)regionExtent.Y;
+                        
             nearCallback = near;
-
             m_rayCastManager = new ODERayCastRequestManager(this);
 
-            WorldExtents.X = m_frameWorkScene.RegionInfo.RegionSizeX;
-            m_regionWidth = (uint)WorldExtents.X;
-            WorldExtents.Y = m_frameWorkScene.RegionInfo.RegionSizeY;
-            m_regionHeight = (uint)WorldExtents.Y;
-
-            lock (OdeLock)
-            {
-                // Create the world and the first space
-                try
-                {
-                    world = d.WorldCreate();
-                    TopSpace = d.HashSpaceCreate(IntPtr.Zero);
-
-                    // now the major subspaces
-                    ActiveSpace = d.HashSpaceCreate(TopSpace);
-                    CharsSpace = d.HashSpaceCreate(TopSpace);
-                    StaticSpace = d.HashSpaceCreate(TopSpace);
-                    GroundSpace = d.HashSpaceCreate(TopSpace);
-                }
-                catch
-                {
-                    // i must RtC#FM 
-                    // i did!
-                }
-
-                d.HashSpaceSetLevels(TopSpace, -5, 12);
-                d.HashSpaceSetLevels(ActiveSpace, -5, 10);
-                d.HashSpaceSetLevels(CharsSpace, -4, 3);
-                d.HashSpaceSetLevels(StaticSpace, -5, 12);
-                d.HashSpaceSetLevels(GroundSpace, 0, 8);
-
-                // demote to second level
-                d.SpaceSetSublevel(ActiveSpace, 1);
-                d.SpaceSetSublevel(CharsSpace, 1);
-                d.SpaceSetSublevel(StaticSpace, 1);
-                d.SpaceSetSublevel(GroundSpace, 1);
-
-                d.GeomSetCategoryBits(ActiveSpace, (uint)(CollisionCategories.Space |
-                                                        CollisionCategories.Geom |
-                                                        CollisionCategories.Character |
-                                                        CollisionCategories.Phantom |
-                                                        CollisionCategories.VolumeDtc
-                                                        ));
-                d.GeomSetCollideBits(ActiveSpace, (uint)(CollisionCategories.Space |
-                                                        CollisionCategories.Geom |
-                                                        CollisionCategories.Character |
-                                                        CollisionCategories.Phantom |
-                                                        CollisionCategories.VolumeDtc
-                                                        ));
-                d.GeomSetCategoryBits(CharsSpace, (uint)(CollisionCategories.Space |
-                                        CollisionCategories.Geom |
-                                        CollisionCategories.Character |
-                                        CollisionCategories.Phantom |
-                                        CollisionCategories.VolumeDtc
-                                        ));
-                d.GeomSetCollideBits(CharsSpace, 0);
-
-                d.GeomSetCategoryBits(StaticSpace, (uint)(CollisionCategories.Space |
-                                                        CollisionCategories.Geom |
-                                                        //                                                        CollisionCategories.Land |
-                                                        //                                                        CollisionCategories.Water |
-                                                        CollisionCategories.Phantom |
-                                                        CollisionCategories.VolumeDtc
-                                                        ));
-                d.GeomSetCollideBits(StaticSpace, 0);
-
-                d.GeomSetCategoryBits(GroundSpace, (uint)(CollisionCategories.Land));
-                d.GeomSetCollideBits(GroundSpace, 0);
+            // Create the world and the first space
+            world = d.WorldCreate();
+            space = d.HashSpaceCreate(IntPtr.Zero);
 
-                contactgroup = d.JointGroupCreate(maxContactsbeforedeath + 1);
-                //contactgroup
+            contactgroup = d.JointGroupCreate(0);
 
-                d.WorldSetAutoDisableFlag(world, false);
-            }
-
-
-            //  checkThread();
+            d.WorldSetAutoDisableFlag(world, false);
+        }
 
+        // Initialize from configs
+        private void InitialiseFromConfig(IConfigSource config)
+        {
+            InitializeExtraStats();
 
+            m_config = config;
             // Defaults
 
-            int contactsPerCollision = 80;
+            avPIDD = 2200.0f;
+            avPIDP = 900.0f;
+            avStandupTensor = 550000f;
 
-            physicsconfig = null;
+            int contactsPerCollision = 80;
 
             if (m_config != null)
             {
-                physicsconfig = m_config.Configs["ODEPhysicsSettings"];
+                IConfig physicsconfig = m_config.Configs["ODEPhysicsSettings"];
                 if (physicsconfig != null)
                 {
-                    gravityx = physicsconfig.GetFloat("world_gravityx", gravityx);
-                    gravityy = physicsconfig.GetFloat("world_gravityy", gravityy);
-                    gravityz = physicsconfig.GetFloat("world_gravityz", gravityz);
-
-                    metersInSpace = physicsconfig.GetFloat("meters_in_small_space", metersInSpace);
-
-                    //                    contactsurfacelayer = physicsconfig.GetFloat("world_contact_surface_layer", contactsurfacelayer);
-
-                    ODE_STEPSIZE = physicsconfig.GetFloat("world_stepsize", ODE_STEPSIZE);
+                    CollectStats = physicsconfig.GetBoolean("collect_stats", false);
 
-                    avDensity = physicsconfig.GetFloat("av_density", avDensity);
-                    avMovementDivisorWalk = physicsconfig.GetFloat("av_movement_divisor_walk", avMovementDivisorWalk);
-                    avMovementDivisorRun = physicsconfig.GetFloat("av_movement_divisor_run", avMovementDivisorRun);
+                    gravityx = physicsconfig.GetFloat("world_gravityx", 0f);
+                    gravityy = physicsconfig.GetFloat("world_gravityy", 0f);
+                    gravityz = physicsconfig.GetFloat("world_gravityz", -9.8f);
 
-                    contactsPerCollision = physicsconfig.GetInt("contacts_per_collision", contactsPerCollision);
-
-                    geomDefaultDensity = physicsconfig.GetFloat("geometry_default_density", geomDefaultDensity);
-                    bodyFramesAutoDisable = physicsconfig.GetInt("body_frames_auto_disable", bodyFramesAutoDisable);
-
-                    physics_logging = physicsconfig.GetBoolean("physics_logging", false);
-                    physics_logging_interval = physicsconfig.GetInt("physics_logging_interval", 0);
-                    physics_logging_append_existing_logfile = physicsconfig.GetBoolean("physics_logging_append_existing_logfile", false);
-
-                    minimumGroundFlightOffset = physicsconfig.GetFloat("minimum_ground_flight_offset", minimumGroundFlightOffset);
-                    maximumMassObject = physicsconfig.GetFloat("maximum_mass_object", maximumMassObject);
-
-                    avDensity *= 3f / 80f;  // scale other engines density option to this
-                }
-            }
-
-            float heartbeat = 1/m_frameWorkScene.FrameTime;
-            maximumAngularVelocity = 0.49f * heartbeat *(float)Math.PI;
-            maxAngVelocitySQ = maximumAngularVelocity * maximumAngularVelocity;
+                    float avatarTerminalVelocity = physicsconfig.GetFloat("avatar_terminal_velocity", 54f);
+                    AvatarTerminalVelocity = Util.Clamp<float>(avatarTerminalVelocity, 0, 255f);
+                    if (AvatarTerminalVelocity != avatarTerminalVelocity)
+                    {
+                        m_log.WarnFormat(
+                            "[ODE SCENE]: avatar_terminal_velocity of {0} is invalid.  Clamping to {1}",
+                            avatarTerminalVelocity, AvatarTerminalVelocity);
+                    }
 
-            d.WorldSetCFM(world, comumContactCFM);
-            d.WorldSetERP(world, comumContactERP);
+                    HashspaceLow = physicsconfig.GetInt("world_hashspace_level_low", -5);
+                    HashspaceHigh = physicsconfig.GetInt("world_hashspace_level_high", 12);
 
-            d.WorldSetGravity(world, gravityx, gravityy, gravityz);
+                    metersInSpace = physicsconfig.GetFloat("meters_in_small_space", 29.9f);
 
-            d.WorldSetLinearDamping(world, 0.002f);
-            d.WorldSetAngularDamping(world, 0.002f);
-            d.WorldSetAngularDampingThreshold(world, 0f);
-            d.WorldSetLinearDampingThreshold(world, 0f);
-            d.WorldSetMaxAngularSpeed(world, maximumAngularVelocity);
+                    contactsurfacelayer = physicsconfig.GetFloat("world_contact_surface_layer", 0.001f);
 
-            d.WorldSetQuickStepNumIterations(world, m_physicsiterations);
+                    nmTerrainContactFriction = physicsconfig.GetFloat("nm_terraincontact_friction", 255.0f);
+                    nmTerrainContactBounce = physicsconfig.GetFloat("nm_terraincontact_bounce", 0.1f);
+                    nmTerrainContactERP = physicsconfig.GetFloat("nm_terraincontact_erp", 0.1025f);
 
-            d.WorldSetContactSurfaceLayer(world, contactsurfacelayer);
-            d.WorldSetContactMaxCorrectingVel(world, 60.0f);
+                    mTerrainContactFriction = physicsconfig.GetFloat("m_terraincontact_friction", 75f);
+                    mTerrainContactBounce = physicsconfig.GetFloat("m_terraincontact_bounce", 0.05f);
+                    mTerrainContactERP = physicsconfig.GetFloat("m_terraincontact_erp", 0.05025f);
 
-            HalfOdeStep = ODE_STEPSIZE * 0.5f;
-            odetimestepMS = (int)(1000.0f * ODE_STEPSIZE + 0.5f);
+                    nmAvatarObjectContactFriction = physicsconfig.GetFloat("objectcontact_friction", 250f);
+                    nmAvatarObjectContactBounce = physicsconfig.GetFloat("objectcontact_bounce", 0.2f);
 
-            ContactgeomsArray = Marshal.AllocHGlobal(contactsPerCollision * d.ContactGeom.unmanagedSizeOf);
-            GlobalContactsArray = Marshal.AllocHGlobal((maxContactsbeforedeath + 100) * d.Contact.unmanagedSizeOf);
+                    mAvatarObjectContactFriction = physicsconfig.GetFloat("m_avatarobjectcontact_friction", 75f);
+                    mAvatarObjectContactBounce = physicsconfig.GetFloat("m_avatarobjectcontact_bounce", 0.1f);
 
-            SharedTmpcontact.geom.g1 = IntPtr.Zero;
-            SharedTmpcontact.geom.g2 = IntPtr.Zero;
+                    ODE_STEPSIZE = physicsconfig.GetFloat("world_stepsize", ODE_STEPSIZE);
+                    m_physicsiterations = physicsconfig.GetInt("world_solver_iterations", 10);
 
-            SharedTmpcontact.geom.side1 = -1;
-            SharedTmpcontact.geom.side2 = -1;
+                    avDensity = physicsconfig.GetFloat("av_density", 80f);
+//                    avHeightFudgeFactor = physicsconfig.GetFloat("av_height_fudge_factor", 0.52f);
+                    avMovementDivisorWalk = physicsconfig.GetFloat("av_movement_divisor_walk", 1.3f);
+                    avMovementDivisorRun = physicsconfig.GetFloat("av_movement_divisor_run", 0.8f);
+                    avCapRadius = physicsconfig.GetFloat("av_capsule_radius", 0.37f);
+                    avplanted = physicsconfig.GetBoolean("av_planted", false);
+                    av_av_collisions_off = physicsconfig.GetBoolean("av_av_collisions_off", false);
 
-            SharedTmpcontact.surface.mode = comumContactFlags;
-            SharedTmpcontact.surface.mu = 0;
-            SharedTmpcontact.surface.bounce = 0;
-            SharedTmpcontact.surface.soft_cfm = comumContactCFM;
-            SharedTmpcontact.surface.soft_erp = comumContactERP;
-            SharedTmpcontact.surface.slip1 = comumContactSLIP;
-            SharedTmpcontact.surface.slip2 = comumContactSLIP;
+                    IsAvCapsuleTilted = physicsconfig.GetBoolean("av_capsule_tilted", false);
 
-            m_materialContactsData[(int)Material.Stone].mu = 0.8f;
-            m_materialContactsData[(int)Material.Stone].bounce = 0.4f;
+                    contactsPerCollision = physicsconfig.GetInt("contacts_per_collision", 80);
 
-            m_materialContactsData[(int)Material.Metal].mu = 0.3f;
-            m_materialContactsData[(int)Material.Metal].bounce = 0.4f;
+                    geomContactPointsStartthrottle = physicsconfig.GetInt("geom_contactpoints_start_throttling", 5);
+                    geomUpdatesPerThrottledUpdate = physicsconfig.GetInt("geom_updates_before_throttled_update", 15);
 
-            m_materialContactsData[(int)Material.Glass].mu = 0.2f;
-            m_materialContactsData[(int)Material.Glass].bounce = 0.7f;
+                    geomDefaultDensity = physicsconfig.GetFloat("geometry_default_density", 10.000006836f);
+                    bodyFramesAutoDisable = physicsconfig.GetInt("body_frames_auto_disable", 20);
 
-            m_materialContactsData[(int)Material.Wood].mu = 0.6f;
-            m_materialContactsData[(int)Material.Wood].bounce = 0.5f;
+                    bodyPIDD = physicsconfig.GetFloat("body_pid_derivative", 35f);
+                    bodyPIDG = physicsconfig.GetFloat("body_pid_gain", 25f);
 
-            m_materialContactsData[(int)Material.Flesh].mu = 0.9f;
-            m_materialContactsData[(int)Material.Flesh].bounce = 0.3f;
+                    forceSimplePrimMeshing = physicsconfig.GetBoolean("force_simple_prim_meshing", forceSimplePrimMeshing);
+                    meshSculptedPrim = physicsconfig.GetBoolean("mesh_sculpted_prim", true);
+                    meshSculptLOD = physicsconfig.GetFloat("mesh_lod", 32f);
+                    MeshSculptphysicalLOD = physicsconfig.GetFloat("mesh_physical_lod", 16f);
+                    m_filterCollisions = physicsconfig.GetBoolean("filter_collisions", false);
 
-            m_materialContactsData[(int)Material.Plastic].mu = 0.4f;
-            m_materialContactsData[(int)Material.Plastic].bounce = 0.7f;
+                    avPIDD = physicsconfig.GetFloat("av_pid_derivative", 2200.0f);
+                    avPIDP = physicsconfig.GetFloat("av_pid_proportional", 900.0f);
+                    avStandupTensor = physicsconfig.GetFloat("av_capsule_standup_tensor", 550000f);
 
-            m_materialContactsData[(int)Material.Rubber].mu = 0.9f;
-            m_materialContactsData[(int)Material.Rubber].bounce = 0.95f;
+                    physics_logging = physicsconfig.GetBoolean("physics_logging", false);
+                    physics_logging_interval = physicsconfig.GetInt("physics_logging_interval", 0);
+                    physics_logging_append_existing_logfile = physicsconfig.GetBoolean("physics_logging_append_existing_logfile", false);
 
-            m_materialContactsData[(int)Material.light].mu = 0.0f;
-            m_materialContactsData[(int)Material.light].bounce = 0.0f;
+//                    m_NINJA_physics_joints_enabled = physicsconfig.GetBoolean("use_NINJA_physics_joints", false);
+                    minimumGroundFlightOffset = physicsconfig.GetFloat("minimum_ground_flight_offset", 3f);
+                    maximumMassObject = physicsconfig.GetFloat("maximum_mass_object", 10000.01f);
+                }
+            }
 
+            contacts = new d.ContactGeom[contactsPerCollision];
 
             spacesPerMeterX = 1.0f / metersInSpace;
-            spacesPerMeterY = spacesPerMeterX;
+            spacesPerMeterY = 1.0f / metersInSpace;
+
             spaceGridMaxX = (int)(WorldExtents.X * spacesPerMeterX);
             spaceGridMaxY = (int)(WorldExtents.Y * spacesPerMeterY);
 
+            // note: limit number of spaces
             if (spaceGridMaxX > 24)
             {
                 spaceGridMaxX = 24;
-                spacesPerMeterX = spaceGridMaxX / WorldExtents.X;
+                spacesPerMeterX =  spaceGridMaxX / WorldExtents.X;
             }
-
             if (spaceGridMaxY > 24)
             {
                 spaceGridMaxY = 24;
                 spacesPerMeterY = spaceGridMaxY / WorldExtents.Y;
             }
 
-            staticPrimspace = new IntPtr[spaceGridMaxX, spaceGridMaxY];
+            staticPrimspace = new IntPtr[spaceGridMaxX, spaceGridMaxY]; 
 
-            // create all spaces now
-            int i, j;
-            IntPtr newspace;
+            // make this index limits
+            spaceGridMaxX--;
+            spaceGridMaxY--;
 
-            for (i = 0; i < spaceGridMaxX; i++)
-                for (j = 0; j < spaceGridMaxY; j++)
-                {
-                    newspace = d.HashSpaceCreate(StaticSpace);
-                    d.GeomSetCategoryBits(newspace, (int)CollisionCategories.Space);
-                    waitForSpaceUnlock(newspace);
-                    d.SpaceSetSublevel(newspace, 2);
-                    d.HashSpaceSetLevels(newspace, -2, 8);
-                    d.GeomSetCategoryBits(newspace, (uint)(CollisionCategories.Space |
-                                        CollisionCategories.Geom |
-                                        CollisionCategories.Land |
-                                        CollisionCategories.Water |
-                                        CollisionCategories.Phantom |
-                                        CollisionCategories.VolumeDtc
-                                        ));
-                    d.GeomSetCollideBits(newspace, 0);
+            // Centeral contact friction and bounce
+            // ckrinke 11/10/08 Enabling soft_erp but not soft_cfm until I figure out why
+            // an avatar falls through in Z but not in X or Y when walking on a prim.
+            contact.surface.mode |= d.ContactFlags.SoftERP;
+            contact.surface.mu = nmAvatarObjectContactFriction;
+            contact.surface.bounce = nmAvatarObjectContactBounce;
+            contact.surface.soft_cfm = 0.010f;
+            contact.surface.soft_erp = 0.010f;
+
+            // Terrain contact friction and Bounce
+            // This is the *non* moving version.   Use this when an avatar
+            // isn't moving to keep it in place better
+            TerrainContact.surface.mode |= d.ContactFlags.SoftERP;
+            TerrainContact.surface.mu = nmTerrainContactFriction;
+            TerrainContact.surface.bounce = nmTerrainContactBounce;
+            TerrainContact.surface.soft_erp = nmTerrainContactERP;
+
+            WaterContact.surface.mode |= (d.ContactFlags.SoftERP | d.ContactFlags.SoftCFM);
+            WaterContact.surface.mu = 0f; // No friction
+            WaterContact.surface.bounce = 0.0f; // No bounce
+            WaterContact.surface.soft_cfm = 0.010f;
+            WaterContact.surface.soft_erp = 0.010f;
+
+            // Prim contact friction and bounce
+            // THis is the *non* moving version of friction and bounce
+            // Use this when an avatar comes in contact with a prim
+            // and is moving
+            AvatarMovementprimContact.surface.mu = mAvatarObjectContactFriction;
+            AvatarMovementprimContact.surface.bounce = mAvatarObjectContactBounce;
+
+            // Terrain contact friction bounce and various error correcting calculations
+            // Use this when an avatar is in contact with the terrain and moving.
+            AvatarMovementTerrainContact.surface.mode |= d.ContactFlags.SoftERP;
+            AvatarMovementTerrainContact.surface.mu = mTerrainContactFriction;
+            AvatarMovementTerrainContact.surface.bounce = mTerrainContactBounce;
+            AvatarMovementTerrainContact.surface.soft_erp = mTerrainContactERP;
 
-                    staticPrimspace[i, j] = newspace;
-                }
+            /*
+                <summary></summary>
+                Stone = 0,
+                /// <summary></summary>
+                Metal = 1,
+                /// <summary></summary>
+                Glass = 2,
+                /// <summary></summary>
+                Wood = 3,
+                /// <summary></summary>
+                Flesh = 4,
+                /// <summary></summary>
+                Plastic = 5,
+                /// <summary></summary>
+                Rubber = 6
+             */
+
+            m_materialContacts = new d.Contact[7,2];
+
+            m_materialContacts[(int)Material.Stone, 0] = new d.Contact();
+            m_materialContacts[(int)Material.Stone, 0].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Stone, 0].surface.mu = nmAvatarObjectContactFriction;
+            m_materialContacts[(int)Material.Stone, 0].surface.bounce = nmAvatarObjectContactBounce;
+            m_materialContacts[(int)Material.Stone, 0].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Stone, 0].surface.soft_erp = 0.010f;
+
+            m_materialContacts[(int)Material.Stone, 1] = new d.Contact();
+            m_materialContacts[(int)Material.Stone, 1].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Stone, 1].surface.mu = mAvatarObjectContactFriction;
+            m_materialContacts[(int)Material.Stone, 1].surface.bounce = mAvatarObjectContactBounce;
+            m_materialContacts[(int)Material.Stone, 1].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Stone, 1].surface.soft_erp = 0.010f;
+
+            m_materialContacts[(int)Material.Metal, 0] = new d.Contact();
+            m_materialContacts[(int)Material.Metal, 0].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Metal, 0].surface.mu = nmAvatarObjectContactFriction;
+            m_materialContacts[(int)Material.Metal, 0].surface.bounce = nmAvatarObjectContactBounce;
+            m_materialContacts[(int)Material.Metal, 0].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Metal, 0].surface.soft_erp = 0.010f;
+
+            m_materialContacts[(int)Material.Metal, 1] = new d.Contact();
+            m_materialContacts[(int)Material.Metal, 1].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Metal, 1].surface.mu = mAvatarObjectContactFriction;
+            m_materialContacts[(int)Material.Metal, 1].surface.bounce = mAvatarObjectContactBounce;
+            m_materialContacts[(int)Material.Metal, 1].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Metal, 1].surface.soft_erp = 0.010f;
+
+            m_materialContacts[(int)Material.Glass, 0] = new d.Contact();
+            m_materialContacts[(int)Material.Glass, 0].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Glass, 0].surface.mu = 1f;
+            m_materialContacts[(int)Material.Glass, 0].surface.bounce = 0.5f;
+            m_materialContacts[(int)Material.Glass, 0].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Glass, 0].surface.soft_erp = 0.010f;
 
-            // let this now be index limit
-            spaceGridMaxX--;
-            spaceGridMaxY--;
+            /*
+                private float nmAvatarObjectContactFriction = 250f;
+                private float nmAvatarObjectContactBounce = 0.1f;
 
-            // create 4 off world spaces (x<0,x>max,y<0,y>max)
-            staticPrimspaceOffRegion = new IntPtr[4];
+                private float mAvatarObjectContactFriction = 75f;
+                private float mAvatarObjectContactBounce = 0.1f;
+            */
+            m_materialContacts[(int)Material.Glass, 1] = new d.Contact();
+            m_materialContacts[(int)Material.Glass, 1].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Glass, 1].surface.mu = 1f;
+            m_materialContacts[(int)Material.Glass, 1].surface.bounce = 0.5f;
+            m_materialContacts[(int)Material.Glass, 1].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Glass, 1].surface.soft_erp = 0.010f;
+
+            m_materialContacts[(int)Material.Wood, 0] = new d.Contact();
+            m_materialContacts[(int)Material.Wood, 0].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Wood, 0].surface.mu = nmAvatarObjectContactFriction;
+            m_materialContacts[(int)Material.Wood, 0].surface.bounce = nmAvatarObjectContactBounce;
+            m_materialContacts[(int)Material.Wood, 0].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Wood, 0].surface.soft_erp = 0.010f;
+
+            m_materialContacts[(int)Material.Wood, 1] = new d.Contact();
+            m_materialContacts[(int)Material.Wood, 1].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Wood, 1].surface.mu = mAvatarObjectContactFriction;
+            m_materialContacts[(int)Material.Wood, 1].surface.bounce = mAvatarObjectContactBounce;
+            m_materialContacts[(int)Material.Wood, 1].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Wood, 1].surface.soft_erp = 0.010f;
+
+            m_materialContacts[(int)Material.Flesh, 0] = new d.Contact();
+            m_materialContacts[(int)Material.Flesh, 0].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Flesh, 0].surface.mu = nmAvatarObjectContactFriction;
+            m_materialContacts[(int)Material.Flesh, 0].surface.bounce = nmAvatarObjectContactBounce;
+            m_materialContacts[(int)Material.Flesh, 0].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Flesh, 0].surface.soft_erp = 0.010f;
+
+            m_materialContacts[(int)Material.Flesh, 1] = new d.Contact();
+            m_materialContacts[(int)Material.Flesh, 1].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Flesh, 1].surface.mu = mAvatarObjectContactFriction;
+            m_materialContacts[(int)Material.Flesh, 1].surface.bounce = mAvatarObjectContactBounce;
+            m_materialContacts[(int)Material.Flesh, 1].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Flesh, 1].surface.soft_erp = 0.010f;
+
+            m_materialContacts[(int)Material.Plastic, 0] = new d.Contact();
+            m_materialContacts[(int)Material.Plastic, 0].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Plastic, 0].surface.mu = nmAvatarObjectContactFriction;
+            m_materialContacts[(int)Material.Plastic, 0].surface.bounce = nmAvatarObjectContactBounce;
+            m_materialContacts[(int)Material.Plastic, 0].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Plastic, 0].surface.soft_erp = 0.010f;
+
+            m_materialContacts[(int)Material.Plastic, 1] = new d.Contact();
+            m_materialContacts[(int)Material.Plastic, 1].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Plastic, 1].surface.mu = mAvatarObjectContactFriction;
+            m_materialContacts[(int)Material.Plastic, 1].surface.bounce = mAvatarObjectContactBounce;
+            m_materialContacts[(int)Material.Plastic, 1].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Plastic, 1].surface.soft_erp = 0.010f;
+
+            m_materialContacts[(int)Material.Rubber, 0] = new d.Contact();
+            m_materialContacts[(int)Material.Rubber, 0].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Rubber, 0].surface.mu = nmAvatarObjectContactFriction;
+            m_materialContacts[(int)Material.Rubber, 0].surface.bounce = nmAvatarObjectContactBounce;
+            m_materialContacts[(int)Material.Rubber, 0].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Rubber, 0].surface.soft_erp = 0.010f;
+
+            m_materialContacts[(int)Material.Rubber, 1] = new d.Contact();
+            m_materialContacts[(int)Material.Rubber, 1].surface.mode |= d.ContactFlags.SoftERP;
+            m_materialContacts[(int)Material.Rubber, 1].surface.mu = mAvatarObjectContactFriction;
+            m_materialContacts[(int)Material.Rubber, 1].surface.bounce = mAvatarObjectContactBounce;
+            m_materialContacts[(int)Material.Rubber, 1].surface.soft_cfm = 0.010f;
+            m_materialContacts[(int)Material.Rubber, 1].surface.soft_erp = 0.010f;
+
+            d.HashSpaceSetLevels(space, HashspaceLow, HashspaceHigh);
+
+            // Set the gravity,, don't disable things automatically (we set it explicitly on some things)
 
-            for (i = 0; i < 4; i++)
-            {
-                newspace = d.HashSpaceCreate(StaticSpace);
-                d.GeomSetCategoryBits(newspace, (int)CollisionCategories.Space);
-                waitForSpaceUnlock(newspace);
-                d.SpaceSetSublevel(newspace, 2);
-                d.HashSpaceSetLevels(newspace, -2, 8);
-                d.GeomSetCategoryBits(newspace, (uint)(CollisionCategories.Space |
-                                    CollisionCategories.Geom |
-                                    CollisionCategories.Land |
-                                    CollisionCategories.Water |
-                                    CollisionCategories.Phantom |
-                                    CollisionCategories.VolumeDtc
-                                    ));
-                d.GeomSetCollideBits(newspace, 0);
+            d.WorldSetGravity(world, gravityx, gravityy, gravityz);
+            d.WorldSetContactSurfaceLayer(world, contactsurfacelayer);
 
-                staticPrimspaceOffRegion[i] = newspace;
-            }
+            d.WorldSetLinearDamping(world, 256f);
+            d.WorldSetAngularDamping(world, 256f);
+            d.WorldSetAngularDampingThreshold(world, 256f);
+            d.WorldSetLinearDampingThreshold(world, 256f);
+            d.WorldSetMaxAngularSpeed(world, 256f);
 
-            m_lastframe = DateTime.UtcNow;
-            m_lastMeshExpire = m_lastframe;
-        }
+            d.WorldSetQuickStepNumIterations(world, m_physicsiterations);
+            //d.WorldSetContactMaxCorrectingVel(world, 1000.0f);
 
-        internal void waitForSpaceUnlock(IntPtr space)
-        {
-            //if (space != IntPtr.Zero)
-                //while (d.SpaceLockQuery(space)) { } // Wait and do nothing
+            for (int i = 0; i < staticPrimspace.GetLength(0); i++)
+            {
+                for (int j = 0; j < staticPrimspace.GetLength(1); j++)
+                {
+                    staticPrimspace[i, j] = IntPtr.Zero;
+                }
+            }
+
+            _worldInitialized = true;
         }
 
         #region Collision Detection
 
-        // sets a global contact for a joint for contactgeom , and base contact description)
-        private IntPtr CreateContacJoint(ref d.ContactGeom contactGeom,bool smooth)
+        /// <summary>
+        /// Collides two geometries.
+        /// </summary>
+        /// <returns></returns>
+        /// <param name='geom1'></param>
+        /// <param name='geom2'>/param>
+        /// <param name='maxContacts'></param>
+        /// <param name='contactsArray'></param>
+        /// <param name='contactGeomSize'></param>
+        private int CollideGeoms(
+            IntPtr geom1, IntPtr geom2, int maxContacts, d.ContactGeom[] contactsArray, int contactGeomSize)
         {
-            if (m_global_contactcount >= maxContactsbeforedeath)
-                return IntPtr.Zero;
+            int count;
 
-            m_global_contactcount++;
-            if(smooth)
-                SharedTmpcontact.geom.depth = contactGeom.depth * 0.05f;
-            else
-                SharedTmpcontact.geom.depth = contactGeom.depth;
-            SharedTmpcontact.geom.pos = contactGeom.pos;
-            SharedTmpcontact.geom.normal = contactGeom.normal;
+            lock (OdeScene.UniversalColliderSyncObject)
+            {
+                // We do this inside the lock so that we don't count any delay in acquiring it
+                if (CollectStats)
+                    m_nativeCollisionStartTick = Util.EnvironmentTickCount();
+
+                count = d.Collide(geom1, geom2, maxContacts, contactsArray, contactGeomSize);
+            }
 
-            IntPtr contact = new IntPtr(GlobalContactsArray.ToInt64() + (Int64)(m_global_contactcount * d.Contact.unmanagedSizeOf));
-            Marshal.StructureToPtr(SharedTmpcontact, contact, true);
-            return d.JointCreateContactPtr(world, contactgroup, contact);
+            // We do this outside the lock so that any waiting threads aren't held up, though the effect is probably
+            // negligable
+            if (CollectStats)
+                m_stats[ODENativeGeomCollisionFrameMsStatName]
+                    += Util.EnvironmentTickCountSubtract(m_nativeCollisionStartTick);
+
+            return count;
         }
 
-        private bool GetCurContactGeom(int index, ref d.ContactGeom newcontactgeom)
+        /// <summary>
+        /// Collide two spaces or a space and a geometry.
+        /// </summary>
+        /// <param name='space1'></param>
+        /// <param name='space2'>/param>
+        /// <param name='data'></param>
+        private void CollideSpaces(IntPtr space1, IntPtr space2, IntPtr data)
         {
-            if (ContactgeomsArray == IntPtr.Zero || index >= contactsPerCollision)
-                return false;
+            if (CollectStats)
+            {
+                m_inCollisionTiming = true;
+                m_nativeCollisionStartTick = Util.EnvironmentTickCount();
+            }
 
-            IntPtr contactptr = new IntPtr(ContactgeomsArray.ToInt64() + (Int64)(index * d.ContactGeom.unmanagedSizeOf));
-            newcontactgeom = (d.ContactGeom)Marshal.PtrToStructure(contactptr, typeof(d.ContactGeom));
-            return true;
+            d.SpaceCollide2(space1, space2, data, nearCallback);
+
+            if (CollectStats && m_inCollisionTiming)
+            {
+                m_stats[ODENativeSpaceCollisionFrameMsStatName]
+                    += Util.EnvironmentTickCountSubtract(m_nativeCollisionStartTick);
+                m_inCollisionTiming = false;
+            }
         }
 
         /// <summary>
@@ -674,50 +929,70 @@ namespace OpenSim.Region.PhysicsModule.ubOde
         /// <param name="space">The space that contains the geoms.  Remember, spaces are also geoms</param>
         /// <param name="g1">a geometry or space</param>
         /// <param name="g2">another geometry or space</param>
-        /// 
-
         private void near(IntPtr space, IntPtr g1, IntPtr g2)
         {
-            //  no lock here!  It's invoked from within Simulate(), which is thread-locked
+            if (CollectStats && m_inCollisionTiming)
+            {
+                m_stats[ODENativeSpaceCollisionFrameMsStatName]
+                    += Util.EnvironmentTickCountSubtract(m_nativeCollisionStartTick);
+                m_inCollisionTiming = false;
+            }
 
-            if (m_global_contactcount >= maxContactsbeforedeath)
-                return;
+//            m_log.DebugFormat("[PHYSICS]: Colliding {0} and {1} in {2}", g1, g2, space);
+            //  no lock here!  It's invoked from within Simulate(), which is thread-locked
 
             // Test if we're colliding a geom with a space.
             // If so we have to drill down into the space recursively
 
-            if (g1 == IntPtr.Zero || g2 == IntPtr.Zero)
-                return;
-
             if (d.GeomIsSpace(g1) || d.GeomIsSpace(g2))
             {
+                if (g1 == IntPtr.Zero || g2 == IntPtr.Zero)
+                    return;
+                
+                // Separating static prim geometry spaces.
                 // We'll be calling near recursivly if one
                 // of them is a space to find all of the
                 // contact points in the space
                 try
                 {
-                    d.SpaceCollide2(g1, g2, IntPtr.Zero, nearCallback);
+                    CollideSpaces(g1, g2, IntPtr.Zero);
                 }
                 catch (AccessViolationException)
                 {
-                    m_log.Warn("[PHYSICS]: Unable to collide test a space");
+                    m_log.Error("[ODE SCENE]: Unable to collide test a space");
                     return;
                 }
-                //here one should check collisions of geoms inside a space
-                // but on each space we only should have geoms that not colide amoung each other
-                // so we don't dig inside spaces
+                //Colliding a space or a geom with a space or a geom. so drill down
+
+                //Collide all geoms in each space..
+                //if (d.GeomIsSpace(g1)) d.SpaceCollide(g1, IntPtr.Zero, nearCallback);
+                //if (d.GeomIsSpace(g2)) d.SpaceCollide(g2, IntPtr.Zero, nearCallback);
                 return;
             }
 
-            // get geom bodies to check if we already a joint contact
-            // guess this shouldn't happen now
+            if (g1 == IntPtr.Zero || g2 == IntPtr.Zero)
+                return;
+
             IntPtr b1 = d.GeomGetBody(g1);
             IntPtr b2 = d.GeomGetBody(g2);
 
             // d.GeomClassID id = d.GeomGetClass(g1);
 
+            String name1 = null;
+            String name2 = null;
+
+            if (!geom_name_map.TryGetValue(g1, out name1))
+            {
+                name1 = "null";
+            }
+            if (!geom_name_map.TryGetValue(g2, out name2))
+            {
+                name2 = "null";
+            }
+
             // Figure out how many contact points we have
             int count = 0;
+
             try
             {
                 // Colliding Geom To Geom
@@ -728,329 +1003,444 @@ namespace OpenSim.Region.PhysicsModule.ubOde
 
                 if (b1 != IntPtr.Zero && b2 != IntPtr.Zero && d.AreConnectedExcluding(b1, b2, d.JointType.Contact))
                     return;
-                /*
-                // debug
-                                PhysicsActor dp2;
-                                if (d.GeomGetClass(g1) == d.GeomClassID.HeightfieldClass)
-                                {
-                                    d.AABB aabb;
-                                    d.GeomGetAABB(g2, out aabb);
-                                    float x = aabb.MaxX - aabb.MinX;
-                                    float y = aabb.MaxY - aabb.MinY;
-                                    float z = aabb.MaxZ - aabb.MinZ;
-                                    if (x > 60.0f || y > 60.0f || z > 60.0f)
-                                    {
-                                        if (!actor_name_map.TryGetValue(g2, out dp2))
-                                            m_log.WarnFormat("[PHYSICS]: failed actor mapping for geom 2");
-                                        else
-                                            m_log.WarnFormat("[PHYSICS]: land versus large prim geo {0},size {1}, AABBsize <{2},{3},{4}>, at {5} ori {6},({7})",
-                                                dp2.Name, dp2.Size, x, y, z,
-                                                dp2.Position.ToString(),
-                                                dp2.Orientation.ToString(),
-                                                dp2.Orientation.Length());
-                                        return;
-                                    }
-                                }
-                //
-                */
 
+                count = CollideGeoms(g1, g2, contacts.Length, contacts, d.ContactGeom.unmanagedSizeOf);
 
-                if (d.GeomGetCategoryBits(g1) == (uint)CollisionCategories.VolumeDtc ||
-                    d.GeomGetCategoryBits(g2) == (uint)CollisionCategories.VolumeDtc)
-                {
-                    int cflags;
-                    unchecked
-                    {
-                        cflags = (int)(1 | d.CONTACTS_UNIMPORTANT);
-                    }
-                    count = d.CollidePtr(g1, g2, cflags, ContactgeomsArray, d.ContactGeom.unmanagedSizeOf);
-                }
-                else
-                    count = d.CollidePtr(g1, g2, (contactsPerCollision & 0xffff), ContactgeomsArray, d.ContactGeom.unmanagedSizeOf);
+                // All code after this is only relevant if we have any collisions
+                if (count <= 0)
+                    return;
+
+                if (count > contacts.Length)
+                    m_log.Error("[ODE SCENE]: Got " + count + " contacts when we asked for a maximum of " + contacts.Length);
             }
             catch (SEHException)
             {
-                m_log.Error("[PHYSICS]: The Operating system shut down ODE because of corrupt memory.  This could be a result of really irregular terrain.  If this repeats continuously, restart using Basic Physics and terrain fill your terrain.  Restarting the sim.");
-                //                ode.drelease(world);
+                m_log.Error(
+                    "[ODE SCENE]: The Operating system shut down ODE because of corrupt memory.  This could be a result of really irregular terrain.  If this repeats continuously, restart using Basic Physics and terrain fill your terrain.  Restarting the sim.");
                 base.TriggerPhysicsBasedRestart();
             }
             catch (Exception e)
             {
-                m_log.WarnFormat("[PHYSICS]: Unable to collide test an object: {0}", e.Message);
+                m_log.ErrorFormat("[ODE SCENE]: Unable to collide test an object: {0}", e.Message);
                 return;
             }
 
-            // contacts done
-            if (count == 0)
-                return;
-
-            // try get physical actors 
             PhysicsActor p1;
             PhysicsActor p2;
-
+            
+            p1ExpectedPoints = 0;
+            p2ExpectedPoints = 0;
+            
             if (!actor_name_map.TryGetValue(g1, out p1))
             {
-                m_log.WarnFormat("[PHYSICS]: failed actor mapping for geom 1");
-                return;
+                p1 = PANull;
             }
 
             if (!actor_name_map.TryGetValue(g2, out p2))
             {
-                m_log.WarnFormat("[PHYSICS]: failed actor mapping for geom 2");
-                return;
+                p2 = PANull;
             }
 
-
-            // get first contact
-            d.ContactGeom curContact = new d.ContactGeom();
-
-            if (!GetCurContactGeom(0, ref curContact))
-                return;
-
             ContactPoint maxDepthContact = new ContactPoint();
+            if (p1.CollisionScore + count >= float.MaxValue)
+                p1.CollisionScore = 0;
+            p1.CollisionScore += count;
+
+            if (p2.CollisionScore + count >= float.MaxValue)
+                p2.CollisionScore = 0;
+            p2.CollisionScore += count;
 
-            // do volume detection case
-            if ((p1.IsVolumeDtc || p2.IsVolumeDtc))
+            for (int i = 0; i < count; i++)
             {
-                maxDepthContact = new ContactPoint(
-                    new Vector3(curContact.pos.X, curContact.pos.Y, curContact.pos.Z),
-                    new Vector3(curContact.normal.X, curContact.normal.Y, curContact.normal.Z),
-                    curContact.depth, false
+                d.ContactGeom curContact = contacts[i];
+
+                if (curContact.depth > maxDepthContact.PenetrationDepth)
+                {
+                    maxDepthContact = new ContactPoint(
+                        new Vector3(curContact.pos.X, curContact.pos.Y, curContact.pos.Z),
+                        new Vector3(curContact.normal.X, curContact.normal.Y, curContact.normal.Z),
+                        curContact.depth
                     );
+                }
 
-                collision_accounting_events(p1, p2, maxDepthContact);
-                return;
-            }
+                //m_log.Warn("[CCOUNT]: " + count);
+                IntPtr joint;
+                // If we're colliding with terrain, use 'TerrainContact' instead of contact.
+                // allows us to have different settings
+                
+                // We only need to test p2 for 'jump crouch purposes'
+                if (p2 is OdeCharacter && p1.PhysicsActorType == (int)ActorTypes.Prim)
+                {
+                    // Testing if the collision is at the feet of the avatar
+
+                    //m_log.DebugFormat("[PHYSICS]: {0} - {1} - {2} - {3}", curContact.pos.Z, p2.Position.Z, (p2.Position.Z - curContact.pos.Z), (p2.Size.Z * 0.6f));
+                    if ((p2.Position.Z - curContact.pos.Z) > (p2.Size.Z * 0.6f))
+                        p2.IsColliding = true;
+                }
+                else
+                {
+                    p2.IsColliding = true;
+                }
+                
+                //if ((framecount % m_returncollisions) == 0)
 
-            // big messy collision analises
+                switch (p1.PhysicsActorType)
+                {
+                    case (int)ActorTypes.Agent:
+                        p1ExpectedPoints = avatarExpectedContacts;
+                        p2.CollidingObj = true;
+                        break;
+                    case (int)ActorTypes.Prim:
+                        if (p1 != null && p1 is OdePrim)
+                            p1ExpectedPoints = ((OdePrim) p1).ExpectedCollisionContacts;
 
-            float mu = 0;
-            float bounce = 0;
-//            bool IgnoreNegSides = false;
+                        if (p2.Velocity.LengthSquared() > 0.0f)
+                            p2.CollidingObj = true;
+                        break;
+                    case (int)ActorTypes.Unknown:
+                        p2.CollidingGround = true;
+                        break;
+                    default:
+                        p2.CollidingGround = true;
+                        break;
+                }
 
-            ContactData contactdata1 = new ContactData(0, 0, false);
-            ContactData contactdata2 = new ContactData(0, 0, false);
+                // we don't want prim or avatar to explode
 
-            bool dop1ava = false;
-            bool dop2ava = false;
-            bool ignore = false;
-            bool smoothMesh = false;
+                #region InterPenetration Handling - Unintended physics explosions
 
-            switch (p1.PhysicsActorType)
-            {
-                case (int)ActorTypes.Agent:
+                if (curContact.depth >= 0.08f)
+                {
+                    if (curContact.depth >= 1.00f)
                     {
-                        dop1ava = true;
-                        switch (p2.PhysicsActorType)
+                        //m_log.Info("[P]: " + contact.depth.ToString());
+                        if ((p2.PhysicsActorType == (int) ActorTypes.Agent &&
+                             p1.PhysicsActorType == (int) ActorTypes.Unknown) ||
+                            (p1.PhysicsActorType == (int) ActorTypes.Agent &&
+                             p2.PhysicsActorType == (int) ActorTypes.Unknown))
                         {
-                            case (int)ActorTypes.Agent:
-                            case (int)ActorTypes.Prim:
-                                break;
+                            if (p2.PhysicsActorType == (int) ActorTypes.Agent)
+                            {
+                                if (p2 is OdeCharacter)
+                                {
+                                    OdeCharacter character = (OdeCharacter) p2;
+
+                                    //p2.CollidingObj = true;
+                                    curContact.depth = 0.00000003f;
+                                    p2.Velocity = p2.Velocity + new Vector3(0f, 0f, 0.5f);
+                                    curContact.pos =
+                                        new d.Vector3(curContact.pos.X + (p1.Size.X/2),
+                                                      curContact.pos.Y + (p1.Size.Y/2),
+                                                      curContact.pos.Z + (p1.Size.Z/2));
+                                    character.SetPidStatus(true);
+                                }
+                            }
 
-                            default:
-                                ignore = true; // avatar to terrain and water ignored
-                                break;
+                            if (p1.PhysicsActorType == (int) ActorTypes.Agent)
+                            {
+                                if (p1 is OdeCharacter)
+                                {
+                                    OdeCharacter character = (OdeCharacter) p1;
+
+                                    //p2.CollidingObj = true;
+                                    curContact.depth = 0.00000003f;
+                                    p1.Velocity = p1.Velocity + new Vector3(0f, 0f, 0.5f);
+                                    curContact.pos =
+                                        new d.Vector3(curContact.pos.X + (p1.Size.X/2),
+                                                      curContact.pos.Y + (p1.Size.Y/2),
+                                                      curContact.pos.Z + (p1.Size.Z/2));
+                                    character.SetPidStatus(true);
+                                }
+                            }
                         }
-                        break;
                     }
+                }
 
-                case (int)ActorTypes.Prim:
-                    {
-                        switch (p2.PhysicsActorType)
-                        {
-                            case (int)ActorTypes.Agent:
-                                dop2ava = true;
-                                break;
+                #endregion
 
-                            case (int)ActorTypes.Prim:
-                                Vector3 relV = p1.rootVelocity - p2.rootVelocity;
-                                float relVlenSQ = relV.LengthSquared();
-                                if (relVlenSQ > 0.0001f)
-                                {
-                                    p1.CollidingObj = true;
-                                    p2.CollidingObj = true;
-                                }
-                                p1.getContactData(ref contactdata1);
-                                p2.getContactData(ref contactdata2);
-                                bounce = contactdata1.bounce * contactdata2.bounce;
-                                mu = (float)Math.Sqrt(contactdata1.mu * contactdata2.mu);
+                // Logic for collision handling
+                // Note, that if *all* contacts are skipped (VolumeDetect)
+                // The prim still detects (and forwards) collision events but 
+                // appears to be phantom for the world
+                Boolean skipThisContact = false;
 
-                                if (relVlenSQ > 0.01f)
-                                    mu *= frictionMovementMult;
+                if ((p1 is OdePrim) && (((OdePrim)p1).m_isVolumeDetect))
+                    skipThisContact = true;   // No collision on volume detect prims
 
-                                if(d.GeomGetClass(g2) == d.GeomClassID.TriMeshClass &&
-                                    d.GeomGetClass(g1) == d.GeomClassID.TriMeshClass)
-                                    smoothMesh = true;
-                                break;
+                if (av_av_collisions_off)
+                    if ((p1 is OdeCharacter) && (p2 is OdeCharacter))
+                        skipThisContact = true;
 
-                            case (int)ActorTypes.Ground:
-                                p1.getContactData(ref contactdata1);
-                                bounce = contactdata1.bounce * TerrainBounce;
-                                mu = (float)Math.Sqrt(contactdata1.mu * TerrainFriction);
+                if (!skipThisContact && (p2 is OdePrim) && (((OdePrim)p2).m_isVolumeDetect))
+                    skipThisContact = true;   // No collision on volume detect prims
 
-                                Vector3 v1 = p1.rootVelocity;
-                                if (Math.Abs(v1.X) > 0.1f || Math.Abs(v1.Y) > 0.1f)
-                                    mu *= frictionMovementMult;
-                                p1.CollidingGround = true;
+                if (!skipThisContact && curContact.depth < 0f)
+                    skipThisContact = true;
 
-                                if(d.GeomGetClass(g1) == d.GeomClassID.TriMeshClass)
-                                    smoothMesh = true;
-                                break;
+                if (!skipThisContact && checkDupe(curContact, p2.PhysicsActorType))
+                    skipThisContact = true;
 
-                            case (int)ActorTypes.Water:
-                            default:
-                                ignore = true;
-                                break;
-                        }
-                    }
-                    break;
+                const int maxContactsbeforedeath = 4000;
+                joint = IntPtr.Zero;
 
-                case (int)ActorTypes.Ground:
-                    if (p2.PhysicsActorType == (int)ActorTypes.Prim)
-                    {
-                        p2.CollidingGround = true;
-                        p2.getContactData(ref contactdata2);
-                        bounce = contactdata2.bounce * TerrainBounce;
-                        mu = (float)Math.Sqrt(contactdata2.mu * TerrainFriction);
-
-//                        if (curContact.side1 > 0) // should be 2 ?
-//                            IgnoreNegSides = true;
-                        Vector3 v2 = p2.rootVelocity;
-                        if (Math.Abs(v2.X) > 0.1f || Math.Abs(v2.Y) > 0.1f)
-                            mu *= frictionMovementMult;
-
-                        if(d.GeomGetClass(g2) == d.GeomClassID.TriMeshClass)
-                            smoothMesh = true;
-                    }
-                    else
-                        ignore = true;
-                    break;
+                if (!skipThisContact)
+                {
+                    _perloopContact.Add(curContact);
 
-                case (int)ActorTypes.Water:
-                default:
-                    break;
-            }
+                    if (name1 == "Terrain" || name2 == "Terrain")
+                    {
+                        if ((p2.PhysicsActorType == (int) ActorTypes.Agent) &&
+                            (Math.Abs(p2.Velocity.X) > 0.01f || Math.Abs(p2.Velocity.Y) > 0.01f))
+                        {
+                            p2ExpectedPoints = avatarExpectedContacts;
+                            // Avatar is moving on terrain, use the movement terrain contact
+                            AvatarMovementTerrainContact.geom = curContact;
 
-            if (ignore)
-                return;
+                            if (m_global_contactcount < maxContactsbeforedeath)
+                            {
+                                joint = d.JointCreateContact(world, contactgroup, ref AvatarMovementTerrainContact);
+                                m_global_contactcount++;
+                            }
+                        }
+                        else
+                        {
+                            if (p2.PhysicsActorType == (int)ActorTypes.Agent)
+                            {
+                                p2ExpectedPoints = avatarExpectedContacts;
+                                // Avatar is standing on terrain, use the non moving terrain contact
+                                TerrainContact.geom = curContact;
 
-            IntPtr Joint;
-            bool FeetCollision = false;
-            int ncontacts = 0;
+                                if (m_global_contactcount < maxContactsbeforedeath)
+                                {
+                                    joint = d.JointCreateContact(world, contactgroup, ref TerrainContact);
+                                    m_global_contactcount++;
+                                }
+                            }
+                            else
+                            {
+                                if (p2.PhysicsActorType == (int)ActorTypes.Prim && p1.PhysicsActorType == (int)ActorTypes.Prim)
+                                {
+                                    // prim prim contact
+                                    // int pj294950 = 0;
+                                    int movintYN = 0;
+                                    int material = (int) Material.Wood;
+                                    // prim terrain contact
+                                    if (Math.Abs(p2.Velocity.X) > 0.01f || Math.Abs(p2.Velocity.Y) > 0.01f)
+                                    {
+                                        movintYN = 1;
+                                    }
 
-            int i = 0;
+                                    if (p2 is OdePrim)
+                                    {
+                                        material = ((OdePrim) p2).m_material;
+                                        p2ExpectedPoints = ((OdePrim)p2).ExpectedCollisionContacts;
+                                    }
+                                   
+                                    // Unnessesary because p1 is defined above
+                                    //if (p1 is OdePrim)
+                                    // { 
+                                    //     p1ExpectedPoints = ((OdePrim)p1).ExpectedCollisionContacts;
+                                    // }
+                                    //m_log.DebugFormat("Material: {0}", material);
 
-            maxDepthContact = new ContactPoint();
-            maxDepthContact.PenetrationDepth = float.MinValue;
-            ContactPoint minDepthContact = new ContactPoint();
-            minDepthContact.PenetrationDepth = float.MaxValue;
+                                    m_materialContacts[material, movintYN].geom = curContact;
 
-            SharedTmpcontact.geom.depth = 0;
-            SharedTmpcontact.surface.mu = mu;
-            SharedTmpcontact.surface.bounce = bounce;
+                                    if (m_global_contactcount < maxContactsbeforedeath)
+                                    {
+                                        joint = d.JointCreateContact(world, contactgroup, ref m_materialContacts[material, movintYN]);
+                                        m_global_contactcount++;
+                                    }
+                                }
+                                else
+                                {
+                                    int movintYN = 0;
+                                    // prim terrain contact
+                                    if (Math.Abs(p2.Velocity.X) > 0.01f || Math.Abs(p2.Velocity.Y) > 0.01f)
+                                    {
+                                        movintYN = 1;
+                                    }
 
-            d.ContactGeom altContact = new d.ContactGeom();
-            bool useAltcontact = false;
-            bool noskip = true;
+                                    int material = (int)Material.Wood;
 
-            if(dop1ava || dop2ava)
-                smoothMesh = false;
+                                    if (p2 is OdePrim)
+                                    {
+                                        material = ((OdePrim)p2).m_material;
+                                        p2ExpectedPoints = ((OdePrim)p2).ExpectedCollisionContacts;
+                                    }
 
-            while (true)
-            {
-                noskip = true;
-                useAltcontact = false;
+                                    //m_log.DebugFormat("Material: {0}", material);
+                                    m_materialContacts[material, movintYN].geom = curContact;
 
-                if (dop1ava)
-                {
-                    if ((((OdeCharacter)p1).Collide(g1, g2, false, ref curContact, ref altContact , ref useAltcontact, ref FeetCollision)))
+                                    if (m_global_contactcount < maxContactsbeforedeath)
+                                    {
+                                        joint = d.JointCreateContact(world, contactgroup, ref m_materialContacts[material, movintYN]);
+                                        m_global_contactcount++;
+                                    }
+                                }
+                            }
+                        }
+                        //if (p2.PhysicsActorType == (int)ActorTypes.Prim)
+                        //{
+                        //m_log.Debug("[PHYSICS]: prim contacting with ground");
+                        //}
+                    }
+                    else if (name1 == "Water" || name2 == "Water")
                     {
-                        if (p2.PhysicsActorType == (int)ActorTypes.Agent)
+                        /*
+                        if ((p2.PhysicsActorType == (int) ActorTypes.Prim))
                         {
-                            p1.CollidingObj = true;
-                            p2.CollidingObj = true;
                         }
-                        else if (p2.rootVelocity.LengthSquared() > 0.0f)
-                            p2.CollidingObj = true;
+                        else
+                        {
+                        }
+                        */
+                        //WaterContact.surface.soft_cfm = 0.0000f;
+                        //WaterContact.surface.soft_erp = 0.00000f;
+                        if (curContact.depth > 0.1f)
+                        {
+                            curContact.depth *= 52;
+                            //contact.normal = new d.Vector3(0, 0, 1);
+                            //contact.pos = new d.Vector3(0, 0, contact.pos.Z - 5f);
+                        }
+
+                        WaterContact.geom = curContact;
+
+                        if (m_global_contactcount < maxContactsbeforedeath)
+                        {
+                            joint = d.JointCreateContact(world, contactgroup, ref WaterContact);
+                            m_global_contactcount++;
+                        }
+                        //m_log.Info("[PHYSICS]: Prim Water Contact" + contact.depth);
                     }
                     else
-                        noskip = false;
-                }
-                else if (dop2ava)
-                {
-                if ((((OdeCharacter)p2).Collide(g2, g1, true, ref curContact, ref altContact , ref useAltcontact, ref FeetCollision)))
                     {
-                    if (p1.PhysicsActorType == (int)ActorTypes.Agent)
+                        if ((p2.PhysicsActorType == (int)ActorTypes.Agent))
                         {
-                            p1.CollidingObj = true;
-                            p2.CollidingObj = true;
+                            p2ExpectedPoints = avatarExpectedContacts;
+                            if ((Math.Abs(p2.Velocity.X) > 0.01f || Math.Abs(p2.Velocity.Y) > 0.01f))
+                            {
+                                // Avatar is moving on a prim, use the Movement prim contact
+                                AvatarMovementprimContact.geom = curContact;
+
+                                if (m_global_contactcount < maxContactsbeforedeath)
+                                {
+                                    joint = d.JointCreateContact(world, contactgroup, ref AvatarMovementprimContact);
+                                    m_global_contactcount++;
+                                }
+                            }
+                            else
+                            {
+                                // Avatar is standing still on a prim, use the non movement contact
+                                contact.geom = curContact;
+
+                                if (m_global_contactcount < maxContactsbeforedeath)
+                                {
+                                    joint = d.JointCreateContact(world, contactgroup, ref contact);
+                                    m_global_contactcount++;
+                                }
+                            }
+                        }
+                        else if (p2.PhysicsActorType == (int)ActorTypes.Prim)
+                        {
+                            //p1.PhysicsActorType
+                            int material = (int)Material.Wood;
+
+                            if (p2 is OdePrim)
+                            {
+                                material = ((OdePrim)p2).m_material;
+                                p2ExpectedPoints = ((OdePrim)p2).ExpectedCollisionContacts;
+                            }
+                            
+                            //m_log.DebugFormat("Material: {0}", material);
+                            m_materialContacts[material, 0].geom = curContact;
+
+                            if (m_global_contactcount < maxContactsbeforedeath)
+                            {
+                                joint = d.JointCreateContact(world, contactgroup, ref m_materialContacts[material, 0]);
+                                m_global_contactcount++;
+                            }
                         }
-                    else if (p1.rootVelocity.LengthSquared() > 0.0f)
-                        p1.CollidingObj = true;
                     }
-                else
-                    noskip = false;
+
+                    if (m_global_contactcount < maxContactsbeforedeath && joint != IntPtr.Zero) // stack collide!
+                    {
+                        d.JointAttach(joint, b1, b2);
+                        m_global_contactcount++;
+                    }
                 }
 
-                if (noskip)
+                collision_accounting_events(p1, p2, maxDepthContact);
+                
+                if (count > ((p1ExpectedPoints + p2ExpectedPoints) * 0.25) + (geomContactPointsStartthrottle))
                 {
-                    if(useAltcontact)
-                        Joint = CreateContacJoint(ref altContact,smoothMesh);
-                    else
-                        Joint = CreateContacJoint(ref curContact,smoothMesh);
+                    // If there are more then 3 contact points, it's likely
+                    // that we've got a pile of objects, so ...
+                    // We don't want to send out hundreds of terse updates over and over again
+                    // so lets throttle them and send them again after it's somewhat sorted out.
+                    p2.ThrottleUpdates = true;
+                }
+                //m_log.Debug(count.ToString());
+                //m_log.Debug("near: A collision was detected between {1} and {2}", 0, name1, name2);
+            }
+        }
 
-                    if (Joint == IntPtr.Zero)
-                        break;
+        private bool checkDupe(d.ContactGeom contactGeom, int atype)
+        {
+            if (!m_filterCollisions)
+                return false;
 
-                    d.JointAttach(Joint, b1, b2);
+            bool result = false;
 
-                    ncontacts++;
+            ActorTypes at = (ActorTypes)atype;
 
-                    if (curContact.depth > maxDepthContact.PenetrationDepth)
+            foreach (d.ContactGeom contact in _perloopContact)
+            {
+                //if ((contact.g1 == contactGeom.g1 && contact.g2 == contactGeom.g2))
+                //{
+                    // || (contact.g2 == contactGeom.g1 && contact.g1 == contactGeom.g2)
+                if (at == ActorTypes.Agent)
+                {
+                    if (((Math.Abs(contactGeom.normal.X - contact.normal.X) < 1.026f)
+                        && (Math.Abs(contactGeom.normal.Y - contact.normal.Y) < 0.303f)
+                        && (Math.Abs(contactGeom.normal.Z - contact.normal.Z) < 0.065f)))
                     {
-                        maxDepthContact.Position.X = curContact.pos.X;
-                        maxDepthContact.Position.Y = curContact.pos.Y;
-                        maxDepthContact.Position.Z = curContact.pos.Z;
-                        maxDepthContact.PenetrationDepth = curContact.depth;
-                        maxDepthContact.CharacterFeet = FeetCollision;
+                        if (Math.Abs(contact.depth - contactGeom.depth) < 0.052f)
+                        {
+                             result = true;
+                             break;
+                        }
                     }
-
-                    if (curContact.depth < minDepthContact.PenetrationDepth)
+                } 
+                else if (at == ActorTypes.Prim)
+                {
+                    if (((Math.Abs(contactGeom.normal.X - contact.normal.X) < 1.026f) && (Math.Abs(contactGeom.normal.Y - contact.normal.Y) < 0.303f) && (Math.Abs(contactGeom.normal.Z - contact.normal.Z) < 0.065f)))
                     {
-                        minDepthContact.PenetrationDepth = curContact.depth;
-                        minDepthContact.SurfaceNormal.X = curContact.normal.X;
-                        minDepthContact.SurfaceNormal.Y = curContact.normal.Y;
-                        minDepthContact.SurfaceNormal.Z = curContact.normal.Z;
+                        if (contactGeom.normal.X == contact.normal.X && contactGeom.normal.Y == contact.normal.Y && contactGeom.normal.Z == contact.normal.Z)
+                        {
+                            if (Math.Abs(contact.depth - contactGeom.depth) < 0.272f)
+                            {
+                                result = true;
+                                break;
+                            }
+                        }
+                        //m_log.DebugFormat("[Collision]: Depth {0}", Math.Abs(contact.depth - contactGeom.depth));
+                        //m_log.DebugFormat("[Collision]: <{0},{1},{2}>", Math.Abs(contactGeom.normal.X - contact.normal.X), Math.Abs(contactGeom.normal.Y - contact.normal.Y), Math.Abs(contactGeom.normal.Z - contact.normal.Z));
                     }
                 }
-
-                if (++i >= count)
-                    break;
-
-                if (!GetCurContactGeom(i, ref curContact))
-                    break;
             }
 
-            if (ncontacts > 0)
-            {
-                maxDepthContact.SurfaceNormal.X = minDepthContact.SurfaceNormal.X;
-                maxDepthContact.SurfaceNormal.Y = minDepthContact.SurfaceNormal.Y;
-                maxDepthContact.SurfaceNormal.Z = minDepthContact.SurfaceNormal.Z;
-
-                collision_accounting_events(p1, p2, maxDepthContact);
-            }
+            return result;
         }
 
         private void collision_accounting_events(PhysicsActor p1, PhysicsActor p2, ContactPoint contact)
         {
-            uint obj2LocalID = 0;
-
-            // update actors collision score
-            if (p1.CollisionScore < float.MaxValue)
-                p1.CollisionScore += 1.0f;
-            if (p2.CollisionScore < float.MaxValue)
-                p2.CollisionScore += 1.0f;
-
+            // obj1LocalID = 0;
+            //returncollisions = false;
+            obj2LocalID = 0;
+            //ctype = 0;
+            //cStartStop = 0;
+//            if (!p2.SubscribedEvents() && !p1.SubscribedEvents())
+//                return;
             bool p1events = p1.SubscribedEvents();
             bool p2events = p2.SubscribedEvents();
 
@@ -1064,379 +1454,799 @@ namespace OpenSim.Region.PhysicsModule.ubOde
 
             Vector3 vel = Vector3.Zero;
             if (p2 != null && p2.IsPhysical)
-                vel = p2.rootVelocity;
+                vel = p2.Velocity;
 
             if (p1 != null && p1.IsPhysical)
-                vel -= p1.rootVelocity;
+                vel -= p1.Velocity;
 
             contact.RelativeSpeed = Vector3.Dot(vel, contact.SurfaceNormal);
 
-            switch ((ActorTypes)p1.PhysicsActorType)
+            switch ((ActorTypes)p2.PhysicsActorType)
             {
                 case ActorTypes.Agent:
-                case ActorTypes.Prim:
-                {
-                    switch ((ActorTypes)p2.PhysicsActorType)
+                    cc2 = (OdeCharacter)p2;
+
+                    // obj1LocalID = cc2.m_localID;
+                    switch ((ActorTypes)p1.PhysicsActorType)
                     {
                         case ActorTypes.Agent:
+                            cc1 = (OdeCharacter)p1;
+                            obj2LocalID = cc1.LocalID;
+                            cc1.AddCollisionEvent(cc2.LocalID, contact);
+                            break;
+
                         case ActorTypes.Prim:
-                            if (p2events)
+                            if (p1 is OdePrim)
                             {
-                                AddCollisionEventReporting(p2);
-                                p2.AddCollisionEvent(p1.ParentActor.LocalID, contact);
+                                cp1 = (OdePrim) p1;
+                                obj2LocalID = cp1.LocalID;
+                                cp1.AddCollisionEvent(cc2.LocalID, contact);
                             }
-                            obj2LocalID = p2.ParentActor.LocalID;
                             break;
 
                         case ActorTypes.Ground:
                         case ActorTypes.Unknown:
-                        default:
                             obj2LocalID = 0;
                             break;
                     }
-                    if (p1events)
-                    {
-                        contact.SurfaceNormal = -contact.SurfaceNormal;
-                        contact.RelativeSpeed = -contact.RelativeSpeed;
-                        AddCollisionEventReporting(p1);
-                        p1.AddCollisionEvent(obj2LocalID, contact);
-                    }
+
+                    cc2.AddCollisionEvent(obj2LocalID, contact);
                     break;
-                }
-                case ActorTypes.Ground:
-                case ActorTypes.Unknown:
-                default:
-                {
-                    if (p2events && !p2.IsVolumeDtc)
+
+                case ActorTypes.Prim:
+
+                    if (p2 is OdePrim)
                     {
-                        AddCollisionEventReporting(p2);
-                        p2.AddCollisionEvent(0, contact);
+                        cp2 = (OdePrim) p2;
+
+                        // obj1LocalID = cp2.m_localID;
+                        switch ((ActorTypes) p1.PhysicsActorType)
+                        {
+                            case ActorTypes.Agent:
+                                if (p1 is OdeCharacter)
+                                {
+                                    cc1 = (OdeCharacter) p1;
+                                    obj2LocalID = cc1.LocalID;
+                                    cc1.AddCollisionEvent(cp2.LocalID, contact);
+                                }
+                                break;
+                            case ActorTypes.Prim:
+
+                                if (p1 is OdePrim)
+                                {
+                                    cp1 = (OdePrim) p1;
+                                    obj2LocalID = cp1.LocalID;
+                                    cp1.AddCollisionEvent(cp2.LocalID, contact);
+                                }
+                                break;
+
+                            case ActorTypes.Ground:
+                            case ActorTypes.Unknown:
+                                obj2LocalID = 0;
+                                break;
+                        }
+
+                        cp2.AddCollisionEvent(obj2LocalID, contact);
                     }
                     break;
-                }
             }
         }
-
         /// <summary>
         /// This is our collision testing routine in ODE
         /// </summary>
-        /// <param name="timeStep"></param>
         private void collision_optimized()
         {
-            lock (_characters)
-                {
+            _perloopContact.Clear();
+
+            foreach (OdeCharacter chr in _characters)
+            {
+                // Reset the collision values to false
+                // since we don't know if we're colliding yet
+                if (chr.Shell == IntPtr.Zero || chr.Body == IntPtr.Zero)
+                    continue;
+                
+                chr.IsColliding = false;
+                chr.CollidingGround = false;
+                chr.CollidingObj = false;
+                
+                // Test the avatar's geometry for collision with the space
+                // This will return near and the space that they are the closest to
+                // And we'll run this again against the avatar and the space segment
+                // This will return with a bunch of possible objects in the space segment
+                // and we'll run it again on all of them.
                 try
                 {
-                    foreach (OdeCharacter chr in _characters)
-                    {
-                        if (chr == null)
-                            continue;
-
-                        chr.IsColliding = false;
-                        // chr.CollidingGround = false; not done here
-                        chr.CollidingObj = false;
-                        
-                        if(chr.Body == IntPtr.Zero || chr.collider == IntPtr.Zero )
-                            continue;
-                    
-                        // do colisions with static space
-                        d.SpaceCollide2(chr.collider, StaticSpace, IntPtr.Zero, nearCallback);
-
-                        // no coll with gnd
-                    }
-                    // chars with chars
-                    d.SpaceCollide(CharsSpace, IntPtr.Zero, nearCallback);
-
+                    CollideSpaces(space, chr.Shell, IntPtr.Zero);
                 }
                 catch (AccessViolationException)
                 {
-                    m_log.Warn("[PHYSICS]: Unable to collide Character to static space");
+                    m_log.ErrorFormat("[ODE SCENE]: Unable to space collide {0}", PhysicsSceneName);
                 }
-
+                
+                //float terrainheight = GetTerrainHeightAtXY(chr.Position.X, chr.Position.Y);
+                //if (chr.Position.Z + (chr.Velocity.Z * timeStep) < terrainheight + 10)
+                //{
+                //chr.Position.Z = terrainheight + 10.0f;
+                //forcedZ = true;
+                //}
             }
 
-            lock (_activeprims)
+            if (CollectStats)
             {
-                foreach (OdePrim aprim in _activeprims)
-                {
-                    aprim.CollisionScore = 0;
-                    aprim.IsColliding = false;                   
-                }
+                m_tempAvatarCollisionsThisFrame = _perloopContact.Count;
+                m_stats[ODEAvatarContactsStatsName] += m_tempAvatarCollisionsThisFrame;
             }
-            lock (_activegroups)
+
+            List<OdePrim> removeprims = null;
+            foreach (OdePrim chr in _activeprims)
             {
-                try
+                if (chr.Body != IntPtr.Zero && d.BodyIsEnabled(chr.Body) && (!chr.m_disabled))
                 {
-                    foreach (OdePrim aprim in _activegroups)
+                    try
                     {
-                        if(!aprim.m_outbounds && d.BodyIsEnabled(aprim.Body) &&
-                                aprim.collide_geom != IntPtr.Zero)    
+                        lock (chr)
                         {
-                            d.SpaceCollide2(StaticSpace, aprim.collide_geom, IntPtr.Zero, nearCallback);
-                            d.SpaceCollide2(GroundSpace, aprim.collide_geom, IntPtr.Zero, nearCallback);
+                            if (space != IntPtr.Zero && chr.prim_geom != IntPtr.Zero && chr.m_taintremove == false)
+                            {
+                                CollideSpaces(space, chr.prim_geom, IntPtr.Zero);
+                            }
+                            else
+                            {
+                                if (removeprims == null)
+                                {
+                                    removeprims = new List<OdePrim>();
+                                }
+                                removeprims.Add(chr);
+                                m_log.Error(
+                                    "[ODE SCENE]: unable to collide test active prim against space.  The space was zero, the geom was zero or it was in the process of being removed.  Removed it from the active prim list.  This needs to be fixed!");
+                            }
                         }
                     }
-                }
-                catch (Exception e)
-                {
-                    m_log.Warn("[PHYSICS]: Unable to collide Active to Static: " + e.Message);
+                    catch (AccessViolationException)
+                    {
+                        m_log.Error("[ODE SCENE]: Unable to space collide");
+                    }
                 }
             }
 
-            // colide active amoung them
-            try
-            {
-                d.SpaceCollide(ActiveSpace, IntPtr.Zero, nearCallback);
-            }
-            catch (Exception e)
+            if (CollectStats)
+                m_stats[ODEPrimContactsStatName] += _perloopContact.Count - m_tempAvatarCollisionsThisFrame;
+
+            if (removeprims != null)
             {
-                    m_log.Warn("[PHYSICS]: Unable to collide in Active: " + e.Message);
+                foreach (OdePrim chr in removeprims)
+                {
+                    _activeprims.Remove(chr);
+                }
             }
+        }
 
-            // and with chars
-            try
+        #endregion
+
+        // Recovered for use by fly height. Kitto Flora
+        internal float GetTerrainHeightAtXY(float x, float y)
+        {
+            IntPtr heightFieldGeom = IntPtr.Zero;
+            int offsetX = 0;
+            int offsetY = 0;
+
+            if(RegionTerrain.TryGetValue(new Vector3(offsetX,offsetY,0), out heightFieldGeom))
             {
-                d.SpaceCollide2(CharsSpace,ActiveSpace, IntPtr.Zero, nearCallback);
+                if (heightFieldGeom != IntPtr.Zero)
+                {
+                    if (TerrainHeightFieldHeights.ContainsKey(heightFieldGeom))
+                    {
+
+                        int index;
+
+
+                        if ((int)x > WorldExtents.X || (int)y > WorldExtents.Y ||
+                            (int)x < 0.001f || (int)y < 0.001f)
+                            return 0;
+
+                        x = x - offsetX + 1f;
+                        y = y - offsetY + 1f;
+
+                        // map is rotated
+                        index = (int)x * ((int)m_regionHeight + 3) + (int)y;
+
+                        if (index < TerrainHeightFieldHeights[heightFieldGeom].Length)
+                        {
+                            //m_log.DebugFormat("x{0} y{1} = {2}", x, y, (float)TerrainHeightFieldHeights[heightFieldGeom][index]);
+                            return (float)TerrainHeightFieldHeights[heightFieldGeom][index];
+                        }
+                            
+                        else
+                            return 0f;
+                    }
+                    else
+                    {
+                        return 0f;
+                    }
+
+                }
+                else
+                {
+                    return 0f;
+                }
+
             }
-            catch (Exception e)
+            else
             {
-                    m_log.Warn("[PHYSICS]: Unable to collide Active to Character: " + e.Message);
+                return 0f;
             }
-        }
+        } 
+// End recovered. Kitto Flora
 
-        #endregion
         /// <summary>
         /// Add actor to the list that should receive collision events in the simulate loop.
         /// </summary>
         /// <param name="obj"></param>
-        public void AddCollisionEventReporting(PhysicsActor obj)
+        internal void AddCollisionEventReporting(PhysicsActor obj)
         {
-            if (!_collisionEventPrim.Contains(obj))
-                _collisionEventPrim.Add(obj);
+//            m_log.DebugFormat("[PHYSICS]: Adding {0} {1} to collision event reporting", obj.SOPName, obj.LocalID);
+            
+            lock (m_collisionEventActorsChanges)
+                m_collisionEventActorsChanges[obj.LocalID] = obj;
         }
 
         /// <summary>
         /// Remove actor from the list that should receive collision events in the simulate loop.
         /// </summary>
         /// <param name="obj"></param>
-        public void RemoveCollisionEventReporting(PhysicsActor obj)
-        {
-            lock(_collisionEventPrimRemove)
-            {
-               if (_collisionEventPrim.Contains(obj) && !_collisionEventPrimRemove.Contains(obj))
-                    _collisionEventPrimRemove.Add(obj);
-            }
-        }
-
-        public override float TimeDilation
+        internal void RemoveCollisionEventReporting(PhysicsActor obj)
         {
-            get { return m_timeDilation; }
-        }
+//            m_log.DebugFormat("[PHYSICS]: Removing {0} {1} from collision event reporting", obj.SOPName, obj.LocalID);
 
-        public override bool SupportsNINJAJoints
-        {
-            get { return false; }
+            lock (m_collisionEventActorsChanges)
+                m_collisionEventActorsChanges[obj.LocalID] = null;
         }
 
         #region Add/Remove Entities
 
         public override PhysicsActor AddAvatar(string avName, Vector3 position, Vector3 velocity, Vector3 size, bool isFlying)
         {
-            return null;
-        }
+            d.AllocateODEDataForThread(0);
+
+            OdeCharacter newAv
+                = new OdeCharacter(
+                    avName, this, position, velocity, size, avPIDD, avPIDP,
+                    avCapRadius, avStandupTensor, avDensity,
+                    avMovementDivisorWalk, avMovementDivisorRun);
 
-        public override PhysicsActor AddAvatar(uint localID, string avName, Vector3 position, Vector3 size, float feetOffset, bool isFlying)
-        {
-             OdeCharacter newAv = new OdeCharacter(localID, avName, this, position,
-                size, feetOffset, avDensity, avMovementDivisorWalk, avMovementDivisorRun);
             newAv.Flying = isFlying;
             newAv.MinimumGroundFlightOffset = minimumGroundFlightOffset;
-            
+            newAv.m_avatarplanted = avplanted;
+
             return newAv;
         }
 
-        public void AddCharacter(OdeCharacter chr)
+        public override void RemoveAvatar(PhysicsActor actor)
         {
-            lock (_characters)
+//            m_log.DebugFormat(
+//                "[ODE SCENE]: Removing physics character {0} {1} from physics scene {2}",
+//                actor.Name, actor.LocalID, Name);
+
+            lock (OdeLock)
             {
-                if (!_characters.Contains(chr))
-                {
-                    _characters.Add(chr);
-                    if (chr.bad)
-                        m_log.DebugFormat("[PHYSICS] Added BAD actor {0} to characters list", chr.m_uuid);
-                }
+                d.AllocateODEDataForThread(0);
+
+                ((OdeCharacter) actor).Destroy();
             }
         }
 
-        public void RemoveCharacter(OdeCharacter chr)
+        internal void AddCharacter(OdeCharacter chr)
         {
-            lock (_characters)
+            chr.m_avatarplanted = avplanted;
+            if (!_characters.Contains(chr))
             {
-                if (_characters.Contains(chr))
-                {
-                    _characters.Remove(chr);
-                }
+                _characters.Add(chr);
+
+//                m_log.DebugFormat(
+//                    "[ODE SCENE]: Adding physics character {0} {1} to physics scene {2}.  Count now {3}",
+//                    chr.Name, chr.LocalID, Name, _characters.Count);
+
+                if (chr.bad)
+                    m_log.ErrorFormat("[ODE SCENE]: Added BAD actor {0} to characters list", chr.m_uuid);
+            }
+            else
+            {
+                m_log.ErrorFormat(
+                    "[ODE SCENE]: Tried to add character {0} {1} but they are already in the set!",
+                    chr.Name, chr.LocalID);
             }
         }
 
-        public void BadCharacter(OdeCharacter chr)
+        internal void RemoveCharacter(OdeCharacter chr)
         {
-            lock (_badCharacter)
+            if (_characters.Contains(chr))
             {
-                if (!_badCharacter.Contains(chr))
-                    _badCharacter.Add(chr);
+                _characters.Remove(chr);
+
+//                m_log.DebugFormat(
+//                    "[ODE SCENE]: Removing physics character {0} {1} from physics scene {2}.  Count now {3}",
+//                    chr.Name, chr.LocalID, Name, _characters.Count);
+            }
+            else
+            {
+                m_log.ErrorFormat(
+                    "[ODE SCENE]: Tried to remove character {0} {1} but they are not in the list!",
+                    chr.Name, chr.LocalID);
             }
         }
 
-        public override void RemoveAvatar(PhysicsActor actor)
+        private PhysicsActor AddPrim(String name, Vector3 position, Vector3 size, Quaternion rotation,
+                                     PrimitiveBaseShape pbs, bool isphysical, uint localID)
         {
-            //m_log.Debug("[PHYSICS]:ODELOCK");
+            Vector3 pos = position;
+            Vector3 siz = size;
+            Quaternion rot = rotation;
+
+
+            OdePrim newPrim;
             lock (OdeLock)
             {
                 d.AllocateODEDataForThread(0);
-                ((OdeCharacter) actor).Destroy();
+                newPrim = new OdePrim(name, this, pos, siz, rot, pbs, isphysical);
+
+                lock (_prims)
+                    _prims.Add(newPrim);
             }
+            newPrim.LocalID = localID;
+            return newPrim;
         }
 
+        /// <summary>
+        /// Make this prim subject to physics.
+        /// </summary>
+        /// <param name="prim"></param>
+        internal void ActivatePrim(OdePrim prim)
+        {
+            // adds active prim..   (ones that should be iterated over in collisions_optimized
+            if (!_activeprims.Contains(prim))
+                _activeprims.Add(prim);
+            //else
+              //  m_log.Warn("[PHYSICS]: Double Entry in _activeprims detected, potential crash immenent");
+        }
 
-        public void addActivePrim(OdePrim activatePrim)
+        public override PhysicsActor AddPrimShape(string primName, PrimitiveBaseShape pbs, Vector3 position,
+                                                  Vector3 size, Quaternion rotation, bool isPhysical, uint localid)
         {
-            // adds active prim..   
-            lock (_activeprims)
-            {
-                if (!_activeprims.Contains(activatePrim))
-                    _activeprims.Add(activatePrim);
-            }
+//            m_log.DebugFormat("[ODE SCENE]: Adding physics prim {0} {1} to physics scene {2}", primName, localid, Name);
+
+            return AddPrim(primName, position, size, rotation, pbs, isPhysical, localid);
         }
 
-        public void addActiveGroups(OdePrim activatePrim)
+        public override float TimeDilation
         {
-            lock (_activegroups)
-            {
-                if (!_activegroups.Contains(activatePrim))
-                    _activegroups.Add(activatePrim);
-            }
+            get { return m_timeDilation; }
         }
 
-        private PhysicsActor AddPrim(String name, Vector3 position, Vector3 size, Quaternion rotation,
-                                     PrimitiveBaseShape pbs, bool isphysical, bool isPhantom, byte shapeType, uint localID)
+        public override bool SupportsNINJAJoints
         {
-            OdePrim newPrim;
-            lock (OdeLock)
-            {
-              
-                newPrim = new OdePrim(name, this, position, size, rotation, pbs, isphysical, isPhantom, shapeType, localID);
-            }
-            return newPrim;
+            get { return m_NINJA_physics_joints_enabled; }
         }
 
-        public override PhysicsActor AddPrimShape(string primName, PrimitiveBaseShape pbs, Vector3 position,
-                                                  Vector3 size, Quaternion rotation, bool isPhysical, bool isPhantom, uint localid)
+        // internal utility function: must be called within a lock (OdeLock)
+        private void InternalAddActiveJoint(PhysicsJoint joint)
         {
-            return AddPrim(primName, position, size, rotation, pbs, isPhysical, isPhantom, 0 , localid);
+            activeJoints.Add(joint);
+            SOPName_to_activeJoint.Add(joint.ObjectNameInScene, joint);
         }
 
+        // internal utility function: must be called within a lock (OdeLock)
+        private void InternalAddPendingJoint(OdePhysicsJoint joint)
+        {
+            pendingJoints.Add(joint);
+            SOPName_to_pendingJoint.Add(joint.ObjectNameInScene, joint);
+        }
 
-        public override PhysicsActor AddPrimShape(string primName, PrimitiveBaseShape pbs, Vector3 position,
-                                                  Vector3 size, Quaternion rotation, bool isPhysical, uint localid)
+        // internal utility function: must be called within a lock (OdeLock)
+        private void InternalRemovePendingJoint(PhysicsJoint joint)
         {
-            return AddPrim(primName, position, size, rotation, pbs, isPhysical,false, 0, localid);
+            pendingJoints.Remove(joint);
+            SOPName_to_pendingJoint.Remove(joint.ObjectNameInScene);
         }
 
-        public override PhysicsActor AddPrimShape(string primName, PrimitiveBaseShape pbs, Vector3 position,
-                                                  Vector3 size, Quaternion rotation, bool isPhysical, bool isPhantom, byte shapeType, uint localid)
+        // internal utility function: must be called within a lock (OdeLock)
+        private void InternalRemoveActiveJoint(PhysicsJoint joint)
         {
-            return AddPrim(primName, position, size, rotation, pbs, isPhysical,isPhantom, shapeType, localid);
+            activeJoints.Remove(joint);
+            SOPName_to_activeJoint.Remove(joint.ObjectNameInScene);
         }
 
-        public void remActivePrim(OdePrim deactivatePrim)
+        public override void DumpJointInfo()
         {
-            lock (_activeprims)
+            string hdr = "[NINJA] JOINTINFO: ";
+            foreach (PhysicsJoint j in pendingJoints)
+            {
+                m_log.Debug(hdr + " pending joint, Name: " + j.ObjectNameInScene + " raw parms:" + j.RawParams);
+            }
+            m_log.Debug(hdr + pendingJoints.Count + " total pending joints");
+            foreach (string jointName in SOPName_to_pendingJoint.Keys)
+            {
+                m_log.Debug(hdr + " pending joints dict contains Name: " + jointName);
+            }
+            m_log.Debug(hdr + SOPName_to_pendingJoint.Keys.Count + " total pending joints dict entries");
+            foreach (PhysicsJoint j in activeJoints)
+            {
+                m_log.Debug(hdr + " active joint, Name: " + j.ObjectNameInScene + " raw parms:" + j.RawParams);
+            }
+            m_log.Debug(hdr + activeJoints.Count + " total active joints");
+            foreach (string jointName in SOPName_to_activeJoint.Keys)
             {
-                _activeprims.Remove(deactivatePrim);
+                m_log.Debug(hdr + " active joints dict contains Name: " + jointName);
+            }
+            m_log.Debug(hdr + SOPName_to_activeJoint.Keys.Count + " total active joints dict entries");
+
+            m_log.Debug(hdr + " Per-body joint connectivity information follows.");
+            m_log.Debug(hdr + joints_connecting_actor.Keys.Count + " bodies are connected by joints.");
+            foreach (string actorName in joints_connecting_actor.Keys)
+            {
+                m_log.Debug(hdr + " Actor " + actorName + " has the following joints connecting it");
+                foreach (PhysicsJoint j in joints_connecting_actor[actorName])
+                {
+                    m_log.Debug(hdr + " * joint Name: " + j.ObjectNameInScene + " raw parms:" + j.RawParams);
+                }
+                m_log.Debug(hdr + joints_connecting_actor[actorName].Count + " connecting joints total for this actor");
             }
         }
-        public void remActiveGroup(OdePrim deactivatePrim)
+
+        public override void RequestJointDeletion(string ObjectNameInScene)
         {
-            lock (_activegroups)
+            lock (externalJointRequestsLock)
             {
-                _activegroups.Remove(deactivatePrim);
+                if (!requestedJointsToBeDeleted.Contains(ObjectNameInScene)) // forbid same deletion request from entering twice to prevent spurious deletions processed asynchronously
+                {
+                    requestedJointsToBeDeleted.Add(ObjectNameInScene);
+                }
             }
         }
 
-        public override void RemovePrim(PhysicsActor prim)
+        private void DeleteRequestedJoints()
         {
-            // As with all ODE physics operations, we don't remove the prim immediately but signal that it should be
-            // removed in the next physics simulate pass.
-            if (prim is OdePrim)
+            List<string> myRequestedJointsToBeDeleted;
+            lock (externalJointRequestsLock)
+            {
+                // make a local copy of the shared list for processing (threading issues)
+                myRequestedJointsToBeDeleted = new List<string>(requestedJointsToBeDeleted);
+            }
+
+            foreach (string jointName in myRequestedJointsToBeDeleted)
             {
-//                lock (OdeLock)
+                lock (OdeLock)
                 {
-                    
-                    OdePrim p = (OdePrim)prim;
-                    p.setPrimForRemoval();
+                    //m_log.Debug("[NINJA] trying to deleting requested joint " + jointName);
+                    if (SOPName_to_activeJoint.ContainsKey(jointName) || SOPName_to_pendingJoint.ContainsKey(jointName))
+                    {
+                        OdePhysicsJoint joint = null;
+                        if (SOPName_to_activeJoint.ContainsKey(jointName))
+                        {
+                            joint = SOPName_to_activeJoint[jointName] as OdePhysicsJoint;
+                            InternalRemoveActiveJoint(joint);
+                        }
+                        else if (SOPName_to_pendingJoint.ContainsKey(jointName))
+                        {
+                            joint = SOPName_to_pendingJoint[jointName] as OdePhysicsJoint;
+                            InternalRemovePendingJoint(joint);
+                        }
+
+                        if (joint != null)
+                        {
+                            //m_log.Debug("joint.BodyNames.Count is " + joint.BodyNames.Count + " and contents " + joint.BodyNames);
+                            for (int iBodyName = 0; iBodyName < 2; iBodyName++)
+                            {
+                                string bodyName = joint.BodyNames[iBodyName];
+                                if (bodyName != "NULL")
+                                {
+                                    joints_connecting_actor[bodyName].Remove(joint);
+                                    if (joints_connecting_actor[bodyName].Count == 0)
+                                    {
+                                        joints_connecting_actor.Remove(bodyName);
+                                    }
+                                }
+                            }
+
+                            DoJointDeactivated(joint);
+                            if (joint.jointID != IntPtr.Zero)
+                            {
+                                d.JointDestroy(joint.jointID);
+                                joint.jointID = IntPtr.Zero;
+                                //DoJointErrorMessage(joint, "successfully destroyed joint " + jointName);
+                            }
+                            else
+                            {
+                                //m_log.Warn("[NINJA] Ignoring re-request to destroy joint " + jointName);
+                            }
+                        }
+                        else
+                        {
+                            // DoJointErrorMessage(joint, "coult not find joint to destroy based on name " + jointName);
+                        }
+                    }
+                    else
+                    {
+                        // DoJointErrorMessage(joint, "WARNING - joint removal failed, joint " + jointName);
+                    }
+                }
+            }
+
+            // remove processed joints from the shared list
+            lock (externalJointRequestsLock)
+            {
+                foreach (string jointName in myRequestedJointsToBeDeleted)
+                {
+                    requestedJointsToBeDeleted.Remove(jointName);
                 }
             }
         }
 
-        public void RemovePrimThreadLocked(OdePrim prim)
+        // for pending joints we don't know if their associated bodies exist yet or not.
+        // the joint is actually created during processing of the taints
+        private void CreateRequestedJoints()
         {
-            //Console.WriteLine("RemovePrimThreadLocked " +  prim.m_primName);
-            lock (prim)
+            List<PhysicsJoint> myRequestedJointsToBeCreated;
+            lock (externalJointRequestsLock)
             {
-//                RemoveCollisionEventReporting(prim);
-                lock (_prims)
-                    _prims.Remove(prim.LocalID);
+                // make a local copy of the shared list for processing (threading issues)
+                myRequestedJointsToBeCreated = new List<PhysicsJoint>(requestedJointsToBeCreated);
+            }
+
+            foreach (PhysicsJoint joint in myRequestedJointsToBeCreated)
+            {
+                lock (OdeLock)
+                {
+                    if (SOPName_to_pendingJoint.ContainsKey(joint.ObjectNameInScene) && SOPName_to_pendingJoint[joint.ObjectNameInScene] != null)
+                    {
+                        DoJointErrorMessage(joint, "WARNING: ignoring request to re-add already pending joint Name:" + joint.ObjectNameInScene + " type:" + joint.Type + " parms: " + joint.RawParams + " pos: " + joint.Position + " rot:" + joint.Rotation);
+                        continue;
+                    }
+                    if (SOPName_to_activeJoint.ContainsKey(joint.ObjectNameInScene) && SOPName_to_activeJoint[joint.ObjectNameInScene] != null)
+                    {
+                        DoJointErrorMessage(joint, "WARNING: ignoring request to re-add already active joint Name:" + joint.ObjectNameInScene + " type:" + joint.Type + " parms: " + joint.RawParams + " pos: " + joint.Position + " rot:" + joint.Rotation);
+                        continue;
+                    }
+
+                    InternalAddPendingJoint(joint as OdePhysicsJoint);
+
+                    if (joint.BodyNames.Count >= 2)
+                    {
+                        for (int iBodyName = 0; iBodyName < 2; iBodyName++)
+                        {
+                            string bodyName = joint.BodyNames[iBodyName];
+                            if (bodyName != "NULL")
+                            {
+                                if (!joints_connecting_actor.ContainsKey(bodyName))
+                                {
+                                    joints_connecting_actor.Add(bodyName, new List<PhysicsJoint>());
+                                }
+                                joints_connecting_actor[bodyName].Add(joint);
+                            }
+                        }
+                    }
+                }
             }
 
+            // remove processed joints from shared list
+            lock (externalJointRequestsLock)
+            {
+                foreach (PhysicsJoint joint in myRequestedJointsToBeCreated)
+                {
+                    requestedJointsToBeCreated.Remove(joint);
+                }
+            }
         }
 
-        public void addToPrims(OdePrim prim)
+        /// <summary>
+        /// Add a request for joint creation.
+        /// </summary>
+        /// <remarks>
+        /// this joint will just be added to a waiting list that is NOT processed during the main
+        /// Simulate() loop (to avoid deadlocks). After Simulate() is finished, we handle unprocessed joint requests.
+        /// </remarks>
+        /// <param name="objectNameInScene"></param>
+        /// <param name="jointType"></param>
+        /// <param name="position"></param>
+        /// <param name="rotation"></param>
+        /// <param name="parms"></param>
+        /// <param name="bodyNames"></param>
+        /// <param name="trackedBodyName"></param>
+        /// <param name="localRotation"></param>
+        /// <returns></returns>
+        public override PhysicsJoint RequestJointCreation(
+            string objectNameInScene, PhysicsJointType jointType, Vector3 position,
+            Quaternion rotation, string parms, List<string> bodyNames, string trackedBodyName, Quaternion localRotation)
         {
-            lock (_prims)
-                _prims[prim.LocalID] = prim;
+            OdePhysicsJoint joint = new OdePhysicsJoint();
+            joint.ObjectNameInScene = objectNameInScene;
+            joint.Type = jointType;
+            joint.Position = position;
+            joint.Rotation = rotation;
+            joint.RawParams = parms;
+            joint.BodyNames = new List<string>(bodyNames);
+            joint.TrackedBodyName = trackedBodyName;
+            joint.LocalRotation = localRotation;
+            joint.jointID = IntPtr.Zero;
+            joint.ErrorMessageCount = 0;
+
+            lock (externalJointRequestsLock)
+            {
+                if (!requestedJointsToBeCreated.Contains(joint)) // forbid same creation request from entering twice 
+                {
+                    requestedJointsToBeCreated.Add(joint);
+                }
+            }
+
+            return joint;
         }
 
-        public OdePrim getPrim(uint id)
+        private void RemoveAllJointsConnectedToActor(PhysicsActor actor)
         {
-            lock (_prims)
+            //m_log.Debug("RemoveAllJointsConnectedToActor: start");
+            if (actor.SOPName != null && joints_connecting_actor.ContainsKey(actor.SOPName) && joints_connecting_actor[actor.SOPName] != null)
             {
-                if(_prims.ContainsKey(id))
-                    return _prims[id];
-                else
-                    return null;
+                List<PhysicsJoint> jointsToRemove = new List<PhysicsJoint>();
+                //TODO: merge these 2 loops (originally it was needed to avoid altering a list being iterated over, but it is no longer needed due to the joint request queue mechanism)
+                foreach (PhysicsJoint j in joints_connecting_actor[actor.SOPName])
+                {
+                    jointsToRemove.Add(j);
+                }
+                foreach (PhysicsJoint j in jointsToRemove)
+                {
+                    //m_log.Debug("RemoveAllJointsConnectedToActor: about to request deletion of " + j.ObjectNameInScene);
+                    RequestJointDeletion(j.ObjectNameInScene);
+                    //m_log.Debug("RemoveAllJointsConnectedToActor: done request deletion of " + j.ObjectNameInScene);
+                    j.TrackedBodyName = null; // *IMMEDIATELY* prevent any further movement of this joint (else a deleted actor might cause spurious tracking motion of the joint for a few frames, leading to the joint proxy object disappearing)
+                }
             }
         }
 
-        public bool havePrim(OdePrim prm)
+        public override void RemoveAllJointsConnectedToActorThreadLocked(PhysicsActor actor)
         {
-            lock (_prims)
-                return _prims.ContainsKey(prm.LocalID);
+            //m_log.Debug("RemoveAllJointsConnectedToActorThreadLocked: start");
+            lock (OdeLock)
+            {
+                //m_log.Debug("RemoveAllJointsConnectedToActorThreadLocked: got lock");
+                RemoveAllJointsConnectedToActor(actor);
+            }
         }
 
-        public void changePrimID(OdePrim prim,uint oldID)
+        // normally called from within OnJointMoved, which is called from within a lock (OdeLock)
+        public override Vector3 GetJointAnchor(PhysicsJoint joint)
         {
-            lock (_prims)
+            Debug.Assert(joint.IsInPhysicsEngine);
+            d.Vector3 pos = new d.Vector3();
+
+            if (!(joint is OdePhysicsJoint))
+            {
+                DoJointErrorMessage(joint, "warning: non-ODE joint requesting anchor: " + joint.ObjectNameInScene);
+            }
+            else
             {
-                if(_prims.ContainsKey(oldID))
-                    _prims.Remove(oldID);
-                _prims[prim.LocalID] = prim;
+                OdePhysicsJoint odeJoint = (OdePhysicsJoint)joint;
+                switch (odeJoint.Type)
+                {
+                    case PhysicsJointType.Ball:
+                        d.JointGetBallAnchor(odeJoint.jointID, out pos);
+                        break;
+                    case PhysicsJointType.Hinge:
+                        d.JointGetHingeAnchor(odeJoint.jointID, out pos);
+                        break;
+                }
             }
+            return new Vector3(pos.X, pos.Y, pos.Z);
         }
-        
-        public bool haveActor(PhysicsActor actor)
+
+        /// <summary>
+        /// Get joint axis.
+        /// </summary>
+        /// <remarks>
+        /// normally called from within OnJointMoved, which is called from within a lock (OdeLock)
+        /// WARNING: ODE sometimes returns <0,0,0> as the joint axis! Therefore this function
+        /// appears to be unreliable. Fortunately we can compute the joint axis ourselves by
+        /// keeping track of the joint's original orientation relative to one of the involved bodies.
+        /// </remarks>
+        /// <param name="joint"></param>
+        /// <returns></returns>
+        public override Vector3 GetJointAxis(PhysicsJoint joint)
         {
-            if (actor is OdePrim)
+            Debug.Assert(joint.IsInPhysicsEngine);
+            d.Vector3 axis = new d.Vector3();
+
+            if (!(joint is OdePhysicsJoint))
             {
-                lock (_prims)
-                    return _prims.ContainsKey(((OdePrim)actor).LocalID);
+                DoJointErrorMessage(joint, "warning: non-ODE joint requesting anchor: " + joint.ObjectNameInScene);
             }
-            else if (actor is OdeCharacter)
+            else
+            {
+                OdePhysicsJoint odeJoint = (OdePhysicsJoint)joint;
+                switch (odeJoint.Type)
+                {
+                    case PhysicsJointType.Ball:
+                        DoJointErrorMessage(joint, "warning - axis requested for ball joint: " + joint.ObjectNameInScene);
+                        break;
+                    case PhysicsJointType.Hinge:
+                        d.JointGetHingeAxis(odeJoint.jointID, out axis);
+                        break;
+                }
+            }
+            return new Vector3(axis.X, axis.Y, axis.Z);
+        }
+
+        /// <summary>
+        /// Stop this prim being subject to physics
+        /// </summary>
+        /// <param name="prim"></param>
+        internal void DeactivatePrim(OdePrim prim)
+        {
+            _activeprims.Remove(prim);
+        }
+
+        public override void RemovePrim(PhysicsActor prim)
+        {
+            // As with all ODE physics operations, we don't remove the prim immediately but signal that it should be
+            // removed in the next physics simulate pass.
+            if (prim is OdePrim)
+            {
+                lock (OdeLock)
+                {
+                    OdePrim p = (OdePrim) prim;
+
+                    p.setPrimForRemoval();
+                    AddPhysicsActorTaint(prim);
+                }
+            }
+        }
+
+        /// <summary>
+        /// This is called from within simulate but outside the locked portion
+        /// We need to do our own locking here
+        /// (Note: As of 20110801 this no longer appears to be true - this is being called within lock (odeLock) in
+        /// Simulate() -- justincc).
+        ///
+        /// Essentially, we need to remove the prim from our space segment, whatever segment it's in.
+        ///
+        /// If there are no more prim in the segment, we need to empty (spacedestroy)the segment and reclaim memory
+        /// that the space was using.
+        /// </summary>
+        /// <param name="prim"></param>
+        internal void RemovePrimThreadLocked(OdePrim prim)
+        {
+//            m_log.DebugFormat("[ODE SCENE]: Removing physical prim {0} {1}", prim.Name, prim.LocalID);
+
+            lock (prim)
             {
-                lock (_characters)
-                    return _characters.Contains((OdeCharacter)actor);
+                RemoveCollisionEventReporting(prim);
+
+                if (prim.prim_geom != IntPtr.Zero)
+                {
+                    prim.ResetTaints();
+
+                    if (prim.IsPhysical)
+                    {
+                        prim.disableBody();
+                        if (prim.childPrim)
+                        {
+                            prim.childPrim = false;
+                            prim.Body = IntPtr.Zero;
+                            prim.m_disabled = true;
+                            prim.IsPhysical = false;
+                        }
+
+
+                    }
+                    prim.m_targetSpace = IntPtr.Zero;
+                    if (!prim.RemoveGeom())
+                        m_log.Warn("[ODE SCENE]: Unable to remove prim from physics scene");
+
+                    lock (_prims)
+                        _prims.Remove(prim);
+
+
+                    if (SupportsNINJAJoints)
+                        RemoveAllJointsConnectedToActorThreadLocked(prim);
+                }
             }
-            return false;
         }
 
         #endregion
@@ -1444,126 +2254,368 @@ namespace OpenSim.Region.PhysicsModule.ubOde
         #region Space Separation Calculation
 
         /// <summary>
-        /// Called when a static prim moves or becomes static
-        /// Places the prim in a space one the static sub-spaces grid
+        /// Takes a space pointer and zeros out the array we're using to hold the spaces
+        /// </summary>
+        /// <param name="pSpace"></param>
+        private void resetSpaceArrayItemToZero(IntPtr pSpace)
+        {
+            for (int x = 0; x < staticPrimspace.GetLength(0); x++)
+            {
+                for (int y = 0; y < staticPrimspace.GetLength(1); y++)
+                {
+                    if (staticPrimspace[x, y] == pSpace)
+                        staticPrimspace[x, y] = IntPtr.Zero;
+                }
+            }
+        }
+
+//        private void resetSpaceArrayItemToZero(int arrayitemX, int arrayitemY)
+//        {
+//            staticPrimspace[arrayitemX, arrayitemY] = IntPtr.Zero;
+//        }
+
+        /// <summary>
+        /// Called when a static prim moves.  Allocates a space for the prim based on its position
         /// </summary>
         /// <param name="geom">the pointer to the geom that moved</param>
         /// <param name="pos">the position that the geom moved to</param>
         /// <param name="currentspace">a pointer to the space it was in before it was moved.</param>
         /// <returns>a pointer to the new space it's in</returns>
-        public IntPtr MoveGeomToStaticSpace(IntPtr geom, Vector3 pos, IntPtr currentspace)
+        internal IntPtr recalculateSpaceForGeom(IntPtr geom, Vector3 pos, IntPtr currentspace)
         {
-            // moves a prim into another static sub-space or from another space into a static sub-space
-
-            // Called ODEPrim so
+            // Called from setting the Position and Size of an ODEPrim so
             // it's already in locked space.
 
-            if (geom == IntPtr.Zero) // shouldn't happen
-                return IntPtr.Zero;
-
-            // get the static sub-space for current position
-            IntPtr newspace = calculateSpaceForGeom(pos);
-
-            if (newspace == currentspace) // if we are there all done
-                return newspace;
+            // we don't want to remove the main space
+            // we don't need to test physical here because this function should
+            // never be called if the prim is physical(active)
 
-            // else remove it from its current space
-            if (currentspace != IntPtr.Zero && d.SpaceQuery(currentspace, geom))
+            // All physical prim end up in the root space
+            //Thread.Sleep(20);
+            if (currentspace != space)
             {
-                if (d.GeomIsSpace(currentspace))
+                //m_log.Info("[SPACE]: C:" + currentspace.ToString() + " g:" + geom.ToString());
+                //if (currentspace == IntPtr.Zero)
+               //{
+                    //int adfadf = 0;
+                //}
+                if (d.SpaceQuery(currentspace, geom) && currentspace != IntPtr.Zero)
                 {
-                    waitForSpaceUnlock(currentspace);
-                    d.SpaceRemove(currentspace, geom);
-
-                    if (d.SpaceGetSublevel(currentspace) > 2 && d.SpaceGetNumGeoms(currentspace) == 0)
+                    if (d.GeomIsSpace(currentspace))
+                    {
+//                        waitForSpaceUnlock(currentspace);
+                        d.SpaceRemove(currentspace, geom);
+                    }
+                    else
                     {
-                        d.SpaceDestroy(currentspace);
+                        m_log.Info("[ODE SCENE]: Invalid Scene passed to 'recalculatespace':" + currentspace +
+                                   " Geom:" + geom);
                     }
                 }
                 else
                 {
-                    m_log.Info("[Physics]: Invalid or empty Space passed to 'MoveGeomToStaticSpace':" + currentspace +
-                                   " Geom:" + geom);
+                    IntPtr sGeomIsIn = d.GeomGetSpace(geom);
+                    if (sGeomIsIn != IntPtr.Zero)
+                    {
+                        if (d.GeomIsSpace(currentspace))
+                        {
+//                            waitForSpaceUnlock(sGeomIsIn);
+                            d.SpaceRemove(sGeomIsIn, geom);
+                        }
+                        else
+                        {
+                            m_log.Info("[ODE SCENE]: Invalid Scene passed to 'recalculatespace':" +
+                                       sGeomIsIn + " Geom:" + geom);
+                        }
+                    }
+                }
+
+                //If there are no more geometries in the sub-space, we don't need it in the main space anymore
+                if (d.SpaceGetNumGeoms(currentspace) == 0)
+                {
+                    if (currentspace != IntPtr.Zero)
+                    {
+                        if (d.GeomIsSpace(currentspace))
+                        {
+                            d.SpaceRemove(space, currentspace);
+                            // free up memory used by the space.
+
+                            resetSpaceArrayItemToZero(currentspace);
+                        }
+                        else
+                        {
+                            m_log.Info("[ODE SCENE]: Invalid Scene passed to 'recalculatespace':" +
+                                       currentspace + " Geom:" + geom);
+                        }
+                    }
                 }
             }
-            else // odd currentspace is null or doesn't contain the geom? lets try the geom ideia of current space
+            else
             {
-                currentspace = d.GeomGetSpace(geom);
-                if (currentspace != IntPtr.Zero)
+                // this is a physical object that got disabled. ;.;
+                if (currentspace != IntPtr.Zero && geom != IntPtr.Zero)
                 {
-                    if (d.GeomIsSpace(currentspace))
+                    if (d.SpaceQuery(currentspace, geom))
                     {
-                        waitForSpaceUnlock(currentspace);
-                        d.SpaceRemove(currentspace, geom);
-
-                        if (d.SpaceGetSublevel(currentspace) > 2 && d.SpaceGetNumGeoms(currentspace) == 0)
+                        if (d.GeomIsSpace(currentspace))
                         {
-                            d.SpaceDestroy(currentspace);
+//                            waitForSpaceUnlock(currentspace);
+                            d.SpaceRemove(currentspace, geom);
+                        }
+                        else
+                        {
+                            m_log.Info("[ODE SCENE]: Invalid Scene passed to 'recalculatespace':" +
+                                       currentspace + " Geom:" + geom);
+                        }
+                    }
+                    else
+                    {
+                        IntPtr sGeomIsIn = d.GeomGetSpace(geom);
+                        if (sGeomIsIn != IntPtr.Zero)
+                        {
+                            if (d.GeomIsSpace(sGeomIsIn))
+                            {
+//                                waitForSpaceUnlock(sGeomIsIn);
+                                d.SpaceRemove(sGeomIsIn, geom);
+                            }
+                            else
+                            {
+                                m_log.Info("[ODE SCENE]: Invalid Scene passed to 'recalculatespace':" +
+                                           sGeomIsIn + " Geom:" + geom);
+                            }
                         }
-
                     }
                 }
             }
 
-            // put the geom in the newspace
-            waitForSpaceUnlock(newspace);
-            d.SpaceAdd(newspace, geom);
+            // The routines in the Position and Size sections do the 'inserting' into the space,
+            // so all we have to do is make sure that the space that we're putting the prim into
+            // is in the 'main' space.
+            int[] iprimspaceArrItem = calculateSpaceArrayItemFromPos(pos);
+            IntPtr newspace = calculateSpaceForGeom(pos);
+
+            if (newspace == IntPtr.Zero)
+            {
+                newspace = createprimspace(iprimspaceArrItem[0], iprimspaceArrItem[1]);
+                d.HashSpaceSetLevels(newspace, HashspaceLow, HashspaceHigh);
+            }
 
-            // let caller know this newspace
             return newspace;
         }
 
         /// <summary>
+        /// Creates a new space at X Y
+        /// </summary>
+        /// <param name="iprimspaceArrItemX"></param>
+        /// <param name="iprimspaceArrItemY"></param>
+        /// <returns>A pointer to the created space</returns>
+        internal IntPtr createprimspace(int iprimspaceArrItemX, int iprimspaceArrItemY)
+        {
+            // creating a new space for prim and inserting it into main space.
+            staticPrimspace[iprimspaceArrItemX, iprimspaceArrItemY] = d.HashSpaceCreate(IntPtr.Zero);
+            d.GeomSetCategoryBits(staticPrimspace[iprimspaceArrItemX, iprimspaceArrItemY], (int)CollisionCategories.Space);
+//            waitForSpaceUnlock(space);
+            d.SpaceSetSublevel(space, 1);
+            d.SpaceAdd(space, staticPrimspace[iprimspaceArrItemX, iprimspaceArrItemY]);
+            
+            return staticPrimspace[iprimspaceArrItemX, iprimspaceArrItemY];
+        }
+
+        /// <summary>
         /// Calculates the space the prim should be in by its position
         /// </summary>
         /// <param name="pos"></param>
         /// <returns>a pointer to the space. This could be a new space or reused space.</returns>
-        public IntPtr calculateSpaceForGeom(Vector3 pos)
+        internal IntPtr calculateSpaceForGeom(Vector3 pos)
         {
-            int x, y;
+            int[] xyspace = calculateSpaceArrayItemFromPos(pos);
+            //m_log.Info("[Physics]: Attempting to use arrayItem: " + xyspace[0].ToString() + "," + xyspace[1].ToString());
+            return staticPrimspace[xyspace[0], xyspace[1]];
+        }
 
-            if (pos.X < 0)
-                return staticPrimspaceOffRegion[0];
+        /// <summary>
+        /// Holds the space allocation logic
+        /// </summary>
+        /// <param name="pos"></param>
+        /// <returns>an array item based on the position</returns>
+        internal int[] calculateSpaceArrayItemFromPos(Vector3 pos)
+        {
+            int[] returnint = new int[2];
 
-            if (pos.Y < 0)
-                return staticPrimspaceOffRegion[2];
+            returnint[0] = (int) (pos.X * spacesPerMeterX);
 
-            x = (int)(pos.X * spacesPerMeterX);
-            if (x > spaceGridMaxX)
-                return staticPrimspaceOffRegion[1];
-            
-            y = (int)(pos.Y * spacesPerMeterY);
-            if (y > spaceGridMaxY)
-                return staticPrimspaceOffRegion[3];
+            if (returnint[0] > spaceGridMaxX)
+                returnint[0] = spaceGridMaxX;
+            if (returnint[0] < 0)
+                returnint[0] = 0;
+
+            returnint[1] = (int)(pos.Y * spacesPerMeterY);
+            if (returnint[1] > spaceGridMaxY)
+                returnint[1] = spaceGridMaxY;
+            if (returnint[1] < 0)
+                returnint[1] = 0;
 
-            return staticPrimspace[x, y];
+            return returnint;
         }
- 
-        #endregion
 
+        #endregion
 
         /// <summary>
-        /// Called to queue a change to a actor
-        /// to use in place of old taint mechanism so changes do have a time sequence
+        /// Routine to figure out if we need to mesh this prim with our mesher
         /// </summary>
-
-        public void AddChange(PhysicsActor actor, changes what, Object arg)
+        /// <param name="pbs"></param>
+        /// <returns></returns>
+        internal bool needsMeshing(PrimitiveBaseShape pbs)
         {
-            ODEchangeitem item = new ODEchangeitem();
-            item.actor = actor;
-            item.what = what;
-            item.arg = arg;
-            ChangesQueue.Enqueue(item);
+            // most of this is redundant now as the mesher will return null if it cant mesh a prim
+            // but we still need to check for sculptie meshing being enabled so this is the most
+            // convenient place to do it for now...
+
+        //    //if (pbs.PathCurve == (byte)Primitive.PathCurve.Circle && pbs.ProfileCurve == (byte)Primitive.ProfileCurve.Circle && pbs.PathScaleY <= 0.75f)
+        //    //m_log.Debug("needsMeshing: " + " pathCurve: " + pbs.PathCurve.ToString() + " profileCurve: " + pbs.ProfileCurve.ToString() + " pathScaleY: " + Primitive.UnpackPathScale(pbs.PathScaleY).ToString());
+            int iPropertiesNotSupportedDefault = 0;
+
+            if (pbs.SculptEntry && !meshSculptedPrim)
+            {
+#if SPAM
+                m_log.Warn("NonMesh");
+#endif
+                return false;
+            }
+
+            // if it's a standard box or sphere with no cuts, hollows, twist or top shear, return false since ODE can use an internal representation for the prim
+            if (!forceSimplePrimMeshing && !pbs.SculptEntry)
+            {
+                if ((pbs.ProfileShape == ProfileShape.Square && pbs.PathCurve == (byte)Extrusion.Straight)
+                    || (pbs.ProfileShape == ProfileShape.HalfCircle && pbs.PathCurve == (byte)Extrusion.Curve1
+                    && pbs.Scale.X == pbs.Scale.Y && pbs.Scale.Y == pbs.Scale.Z))
+                {
+
+                    if (pbs.ProfileBegin == 0 && pbs.ProfileEnd == 0
+                        && pbs.ProfileHollow == 0
+                        && pbs.PathTwist == 0 && pbs.PathTwistBegin == 0
+                        && pbs.PathBegin == 0 && pbs.PathEnd == 0
+                        && pbs.PathTaperX == 0 && pbs.PathTaperY == 0
+                        && pbs.PathScaleX == 100 && pbs.PathScaleY == 100
+                        && pbs.PathShearX == 0 && pbs.PathShearY == 0)
+                    {
+#if SPAM
+                    m_log.Warn("NonMesh");
+#endif
+                        return false;
+                    }
+                }
+            }
+
+            if (pbs.ProfileHollow != 0)
+                iPropertiesNotSupportedDefault++;
+
+            if ((pbs.PathBegin != 0) || pbs.PathEnd != 0)
+                iPropertiesNotSupportedDefault++;
+
+            if ((pbs.PathTwistBegin != 0) || (pbs.PathTwist != 0))
+                iPropertiesNotSupportedDefault++; 
+
+            if ((pbs.ProfileBegin != 0) || pbs.ProfileEnd != 0)
+                iPropertiesNotSupportedDefault++;
+
+            if ((pbs.PathScaleX != 100) || (pbs.PathScaleY != 100))
+                iPropertiesNotSupportedDefault++;
+
+            if ((pbs.PathShearX != 0) || (pbs.PathShearY != 0))
+                iPropertiesNotSupportedDefault++;
+
+            if (pbs.ProfileShape == ProfileShape.Circle && pbs.PathCurve == (byte)Extrusion.Straight)
+                iPropertiesNotSupportedDefault++;
+
+            if (pbs.ProfileShape == ProfileShape.HalfCircle && pbs.PathCurve == (byte)Extrusion.Curve1 && (pbs.Scale.X != pbs.Scale.Y || pbs.Scale.Y != pbs.Scale.Z || pbs.Scale.Z != pbs.Scale.X))
+                iPropertiesNotSupportedDefault++;
+
+            if (pbs.ProfileShape == ProfileShape.HalfCircle && pbs.PathCurve == (byte) Extrusion.Curve1)
+                iPropertiesNotSupportedDefault++;
+
+            // test for torus
+            if ((pbs.ProfileCurve & 0x07) == (byte)ProfileShape.Square)
+            {
+                if (pbs.PathCurve == (byte)Extrusion.Curve1)
+                {
+                    iPropertiesNotSupportedDefault++;
+                }
+            }
+            else if ((pbs.ProfileCurve & 0x07) == (byte)ProfileShape.Circle)
+            {
+                if (pbs.PathCurve == (byte)Extrusion.Straight)
+                {
+                    iPropertiesNotSupportedDefault++;
+                }
+
+                // ProfileCurve seems to combine hole shape and profile curve so we need to only compare against the lower 3 bits
+                else if (pbs.PathCurve == (byte)Extrusion.Curve1)
+                {
+                    iPropertiesNotSupportedDefault++;
+                }
+            }
+            else if ((pbs.ProfileCurve & 0x07) == (byte)ProfileShape.HalfCircle)
+            {
+                if (pbs.PathCurve == (byte)Extrusion.Curve1 || pbs.PathCurve == (byte)Extrusion.Curve2)
+                {
+                    iPropertiesNotSupportedDefault++;
+                }
+            }
+            else if ((pbs.ProfileCurve & 0x07) == (byte)ProfileShape.EquilateralTriangle)
+            {
+                if (pbs.PathCurve == (byte)Extrusion.Straight)
+                {
+                    iPropertiesNotSupportedDefault++;
+                }
+                else if (pbs.PathCurve == (byte)Extrusion.Curve1)
+                {
+                    iPropertiesNotSupportedDefault++;
+                }
+            }
+
+            if (pbs.SculptEntry && meshSculptedPrim)
+                iPropertiesNotSupportedDefault++;
+
+            if (iPropertiesNotSupportedDefault == 0)
+            {
+#if SPAM
+                m_log.Warn("NonMesh");
+#endif
+                return false;
+            }
+#if SPAM
+            m_log.Debug("Mesh");
+#endif
+            return true; 
         }
 
         /// <summary>
         /// Called after our prim properties are set Scale, position etc.
+        /// </summary>
+        /// <remarks>
         /// We use this event queue like method to keep changes to the physical scene occuring in the threadlocked mutex
         /// This assures us that we have no race conditions
-        /// </summary>
-        /// <param name="prim"></param>
-        public override void AddPhysicsActorTaint(PhysicsActor prim)
+        /// </remarks>
+        /// <param name="actor"></param>
+        public override void AddPhysicsActorTaint(PhysicsActor actor)
         {
+            if (actor is OdePrim)
+            {
+                OdePrim taintedprim = ((OdePrim)actor);
+                lock (_taintedPrims)
+                    _taintedPrims.Add(taintedprim);
+            }
+            else if (actor is OdeCharacter)
+            {
+                OdeCharacter taintedchar = ((OdeCharacter)actor);
+                lock (_taintedActors)
+                {
+                    _taintedActors.Add(taintedchar);
+                    if (taintedchar.bad)
+                        m_log.ErrorFormat("[ODE SCENE]: Added BAD actor {0} to tainted actors", taintedchar.m_uuid);
+                }
+            }
         }
 
         // does all pending changes generated during region load process
@@ -1573,315 +2625,319 @@ namespace OpenSim.Region.PhysicsModule.ubOde
             {
                 if (world == IntPtr.Zero)
                 {
-                    ChangesQueue.Clear();
+                    _taintedPrims.Clear();;
                     return;
                 }
 
-                d.AllocateODEDataForThread(~0U);
-
-                ODEchangeitem item;
-
                 int donechanges = 0;
-                if (ChangesQueue.Count > 0)
+                if (_taintedPrims.Count > 0)
                 {
-                    m_log.InfoFormat("[ubOde] start processing pending actor operations");
+
+                    m_log.InfoFormat("[Ode] start processing pending actor operations");
                     int tstart = Util.EnvironmentTickCount();
 
-                    while (ChangesQueue.Dequeue(out item))
+                    d.AllocateODEDataForThread(0);
+
+                    lock (_taintedPrims)
                     {
-                        if (item.actor != null)
+                        foreach (OdePrim prim in _taintedPrims)
                         {
-                            try
-                            {
-                                if (item.actor is OdeCharacter)
-                                    ((OdeCharacter)item.actor).DoAChange(item.what, item.arg);
-                                else if (((OdePrim)item.actor).DoAChange(item.what, item.arg))
-                                    RemovePrimThreadLocked((OdePrim)item.actor);
-                            }
-                            catch
-                            {
-                                m_log.WarnFormat("[PHYSICS]: Operation failed for a actor {0} {1}",
-                                    item.actor.Name, item.what.ToString());
-                            }
+                            if (prim.m_taintremove)
+                                RemovePrimThreadLocked(prim);
+                            else
+                                prim.ProcessTaints();
+
+                            prim.m_collisionscore = 0;
+                            donechanges++;
                         }
-                        donechanges++;
+                        _taintedPrims.Clear();
                     }
+                   
                     int time = Util.EnvironmentTickCountSubtract(tstart);
-                    m_log.InfoFormat("[ubOde] finished {0} operations in {1}ms", donechanges, time);
+                    m_log.InfoFormat("[Ode] finished {0} operations in {1}ms", donechanges, time);
                 }
-                m_log.InfoFormat("[ubOde] {0} prim actors loaded",_prims.Count);
+                m_log.InfoFormat("[Ode] {0} prim actors loaded",_prims.Count);
             }
         }
 
+
         /// <summary>
         /// This is our main simulate loop
+        /// </summary>
+        /// <remarks>
         /// It's thread locked by a Mutex in the scene.
         /// It holds Collisions, it instructs ODE to step through the physical reactions
         /// It moves the objects around in memory
         /// It calls the methods that report back to the object owners.. (scenepresence, SceneObjectGroup)
-        /// </summary>
+        /// </remarks>
         /// <param name="timeStep"></param>
-        /// <returns></returns>
-        public override float Simulate(float reqTimeStep)
+        /// <returns>The number of frames simulated over that period.</returns>
+        public override float Simulate(float timeStep)
         {
-            DateTime now = DateTime.UtcNow;
-            TimeSpan timedif = now - m_lastframe;
-            float timeStep = (float)timedif.TotalSeconds;
-            m_lastframe = now;
-            
-            // acumulate time so we can reduce error
-            step_time += timeStep;
+            if (!_worldInitialized)
+                return 1.0f;
 
-            if (step_time < HalfOdeStep)
-                return 0;
+            int startFrameTick = CollectStats ? Util.EnvironmentTickCount() : 0;
+            int tempTick = 0, tempTick2 = 0;
 
-            if (framecount < 0)
+            if (framecount >= int.MaxValue)
                 framecount = 0;
 
             framecount++;
 
-//            checkThread();
-            int nodeframes = 0;
             float fps = 0;
 
-            lock (SimulationLock)
-                lock(OdeLock)
+            step_time += timeStep;
+
+            float HalfOdeStep = ODE_STEPSIZE * 0.5f;
+            if (step_time < HalfOdeStep)
+                return 0;
+
+
+            // We change _collisionEventPrimChanges to avoid locking _collisionEventPrim itself and causing potential
+            // deadlock if the collision event tries to lock something else later on which is already locked by a
+            // caller that is adding or removing the collision event.
+            lock (m_collisionEventActorsChanges)
             {
-                if (world == IntPtr.Zero)
+                foreach (KeyValuePair<uint, PhysicsActor> kvp in m_collisionEventActorsChanges)
                 {
-                    ChangesQueue.Clear();
-                    return 0;
+                    if (kvp.Value == null)
+                        m_collisionEventActors.Remove(kvp.Key);
+                    else
+                        m_collisionEventActors[kvp.Key] = kvp.Value;
                 }
 
-                ODEchangeitem item;
-                
-//                d.WorldSetQuickStepNumIterations(world, curphysiteractions);
-
-                int loopstartMS = Util.EnvironmentTickCount();
-                int looptimeMS = 0;
-                int changestimeMS = 0;
-                int maxChangestime = (int)(reqTimeStep * 500f); // half the time
-                int maxLoopTime = (int)(reqTimeStep * 1200f); // 1.2 the time
- 
+                m_collisionEventActorsChanges.Clear();
+            }
+
+            if (SupportsNINJAJoints)
+            {
+                DeleteRequestedJoints(); // this must be outside of the lock (OdeLock) to avoid deadlocks
+                CreateRequestedJoints(); // this must be outside of the lock (OdeLock) to avoid deadlocks
+            }
+
+            
+            lock (OdeLock)
+            {
                 d.AllocateODEDataForThread(~0U);
-               
-                if (ChangesQueue.Count > 0)
-                {
-                    while (ChangesQueue.Dequeue(out item))
-                    {
-                        if (item.actor != null)
-                        {
-                            try
-                            {
-                                if (item.actor is OdeCharacter)
-                                    ((OdeCharacter)item.actor).DoAChange(item.what, item.arg);
-                                else if (((OdePrim)item.actor).DoAChange(item.what, item.arg))
-                                    RemovePrimThreadLocked((OdePrim)item.actor);
-                            }
-                            catch
-                            {
-                                m_log.WarnFormat("[PHYSICS]: doChange failed for a actor {0} {1}",
-                                    item.actor.Name, item.what.ToString());
-                            }
-                        }
-                        changestimeMS = Util.EnvironmentTickCountSubtract(loopstartMS);
-                        if (changestimeMS > maxChangestime)
-                            break;
-                    }
-                }
 
-                // do simulation taking at most 150ms total time including changes
-                while (step_time > HalfOdeStep)
+                 while (step_time > HalfOdeStep)
                 {
                     try
                     {
-                        // clear pointer/counter to contacts to pass into joints
-                        m_global_contactcount = 0;
+                        if (CollectStats)
+                            tempTick = Util.EnvironmentTickCount();
 
+                        lock (_taintedActors)
+                        {
+                            foreach (OdeCharacter character in _taintedActors)
+                                character.ProcessTaints();
 
-                        // Move characters
-                        lock (_characters)
+                            _taintedActors.Clear();
+                        }
+
+                        if (CollectStats)
                         {
-                            List<OdeCharacter> defects = new List<OdeCharacter>();
-                            foreach (OdeCharacter actor in _characters)
-                            {
-                                if (actor != null)
-                                    actor.Move(defects);
-                            }
-                            if (defects.Count != 0)
+                            tempTick2 = Util.EnvironmentTickCount();
+                            m_stats[ODEAvatarTaintMsStatName] += Util.EnvironmentTickCountSubtract(tempTick2, tempTick);
+                            tempTick = tempTick2;
+                        }
+
+                        lock (_taintedPrims)
+                        {
+                            foreach (OdePrim prim in _taintedPrims)
                             {
-                                foreach (OdeCharacter defect in defects)
+                                if (prim.m_taintremove)
+                                {
+//                                    Console.WriteLine("Simulate calls RemovePrimThreadLocked for {0}", prim.Name);
+                                    RemovePrimThreadLocked(prim);
+                                }
+                                else
                                 {
-                                    RemoveCharacter(defect);
+//                                    Console.WriteLine("Simulate calls ProcessTaints for {0}", prim.Name);
+                                    prim.ProcessTaints();
                                 }
-                                defects.Clear();
+
+                                prim.m_collisionscore = 0;
+
+                                // This loop can block up the Heartbeat for a very long time on large regions.
+                                // We need to let the Watchdog know that the Heartbeat is not dead
+                                // NOTE: This is currently commented out, but if things like OAR loading are
+                                // timing the heartbeat out we will need to uncomment it
+                                //Watchdog.UpdateThread();
                             }
+
+                            if (SupportsNINJAJoints)
+                                SimulatePendingNINJAJoints();
+
+                            _taintedPrims.Clear();
                         }
 
-                        // Move other active objects
-                        lock (_activegroups)
+                        if (CollectStats)
                         {
-                            foreach (OdePrim aprim in _activegroups)
+                            tempTick2 = Util.EnvironmentTickCount();
+                            m_stats[ODEPrimTaintMsStatName] += Util.EnvironmentTickCountSubtract(tempTick2, tempTick);
+                            tempTick = tempTick2;
+                        }
+
+                        // Move characters
+                        foreach (OdeCharacter actor in _characters)
+                            actor.Move(defects);
+
+                        if (defects.Count != 0)
+                        {
+                            foreach (OdeCharacter actor in defects)
                             {
-                                aprim.Move();
+                                m_log.ErrorFormat(
+                                    "[ODE SCENE]: Removing physics character {0} {1} from physics scene {2} due to defect found when moving",
+                                    actor.Name, actor.LocalID, PhysicsSceneName);
+
+                                RemoveCharacter(actor);
+                                actor.DestroyOdeStructures();
                             }
+
+                            defects.Clear();
+                        }
+
+                        if (CollectStats)
+                        {
+                            tempTick2 = Util.EnvironmentTickCount();
+                            m_stats[ODEAvatarForcesFrameMsStatName] += Util.EnvironmentTickCountSubtract(tempTick2, tempTick);
+                            tempTick = tempTick2;
+                        }
+
+                        // Move other active objects
+                        foreach (OdePrim prim in _activeprims)
+                        {
+                            prim.m_collisionscore = 0;
+                            prim.Move(timeStep);
+                        }
+
+                        if (CollectStats)
+                        {
+                            tempTick2 = Util.EnvironmentTickCount();
+                            m_stats[ODEPrimForcesFrameMsStatName] += Util.EnvironmentTickCountSubtract(tempTick2, tempTick);
+                            tempTick = tempTick2;
                         }
- 
+
                         m_rayCastManager.ProcessQueuedRequests();
 
+                        if (CollectStats)
+                        {
+                            tempTick2 = Util.EnvironmentTickCount();
+                            m_stats[ODERaycastingFrameMsStatName] += Util.EnvironmentTickCountSubtract(tempTick2, tempTick);
+                            tempTick = tempTick2;
+                        }
+
                         collision_optimized();
-                        List<OdePrim> sleepers = new List<OdePrim>();
 
-                        foreach (PhysicsActor obj in _collisionEventPrim)
+                        if (CollectStats)
                         {
-                            if (obj == null)
-                                continue;
+                            tempTick2 = Util.EnvironmentTickCount();
+                            m_stats[ODEOtherCollisionFrameMsStatName] += Util.EnvironmentTickCountSubtract(tempTick2, tempTick);
+                            tempTick = tempTick2;
+                        }
+
+                        foreach (PhysicsActor obj in m_collisionEventActors.Values)
+                        {
+                            // m_log.DebugFormat("[PHYSICS]: Assessing {0} {1} for collision events", obj.SOPName, obj.LocalID);
 
                             switch ((ActorTypes)obj.PhysicsActorType)
                             {
                                 case ActorTypes.Agent:
                                     OdeCharacter cobj = (OdeCharacter)obj;
-                                    cobj.SendCollisions((int)(odetimestepMS));
+                                    cobj.AddCollisionFrameTime(100);
+                                    cobj.SendCollisions();
                                     break;
 
                                 case ActorTypes.Prim:
                                     OdePrim pobj = (OdePrim)obj;
-                                    if (!pobj.m_outbounds)
-                                    {
-                                        pobj.SendCollisions((int)(odetimestepMS));
-                                        if(pobj.Body != IntPtr.Zero && !pobj.m_isSelected &&
-                                            !pobj.m_disabled && !pobj.m_building && 
-                                            !d.BodyIsEnabled(pobj.Body))
-                                        sleepers.Add(pobj);
-                                    }
+                                    pobj.SendCollisions();
                                     break;
                             }
                         }
 
-                        foreach(OdePrim prm in sleepers)
-                            prm.SleeperAddCollisionEvents();
-                        sleepers.Clear();
+//                        if (m_global_contactcount > 0)
+//                            m_log.DebugFormat(
+//                                "[PHYSICS]: Collision contacts to process this frame = {0}", m_global_contactcount);
 
-                        lock(_collisionEventPrimRemove)
-                        {
-                            foreach (PhysicsActor obj in _collisionEventPrimRemove)
-                                _collisionEventPrim.Remove(obj);
+                        m_global_contactcount = 0;
 
-                            _collisionEventPrimRemove.Clear();
+                        if (CollectStats)
+                        {
+                            tempTick2 = Util.EnvironmentTickCount();
+                            m_stats[ODECollisionNotificationFrameMsStatName] += Util.EnvironmentTickCountSubtract(tempTick2, tempTick);
+                            tempTick = tempTick2;
                         }
 
-                        // do a ode simulation step
-                        d.WorldQuickStep(world, ODE_STEPSIZE);
-                        d.JointGroupEmpty(contactgroup);
-
-                        // update managed ideia of physical data and do updates to core
-        /*
-                        lock (_characters)
-                        {
-                            foreach (OdeCharacter actor in _characters)
-                            {
-                                if (actor != null)
-                                {
-                                    if (actor.bad)
-                                        m_log.WarnFormat("[PHYSICS]: BAD Actor {0} in _characters list was not removed?", actor.m_uuid);
+                        lock(SimulationLock)
+                            d.WorldQuickStep(world, ODE_STEPSIZE);
 
-                                    actor.UpdatePositionAndVelocity();
-                                }
-                            }
-                        }
-        */
+                        if (CollectStats)
+                            m_stats[ODENativeStepFrameMsStatName] += Util.EnvironmentTickCountSubtract(tempTick);
 
-                        lock (_activegroups)
-                        {
-                            {
-                                foreach (OdePrim actor in _activegroups)
-                                {
-                                    if (actor.IsPhysical)
-                                    {
-                                        actor.UpdatePositionAndVelocity(framecount);
-                                    }
-                                }
-                            }
-                        }
+                        d.JointGroupEmpty(contactgroup);
                     }
                     catch (Exception e)
                     {
-                        m_log.ErrorFormat("[PHYSICS]: {0}, {1}, {2}", e.Message, e.TargetSite, e);
-//                        ode.dunlock(world);
+                        m_log.ErrorFormat("[ODE SCENE]: {0}, {1}, {2}", e.Message, e.TargetSite, e);
                     }
 
                     step_time -= ODE_STEPSIZE;
-                    nodeframes++;
+                    fps += ODE_STEPSIZE;
+                }
 
-                    looptimeMS = Util.EnvironmentTickCountSubtract(loopstartMS);
-                    if (looptimeMS > maxLoopTime)
-                        break;
+                if (CollectStats)
+                    tempTick = Util.EnvironmentTickCount();
+
+                foreach (OdeCharacter actor in _characters)
+                {
+                    if (actor.bad)
+                        m_log.ErrorFormat("[ODE SCENE]: BAD Actor {0} in _characters list was not removed?", actor.m_uuid);
+
+                    actor.UpdatePositionAndVelocity(defects);
                 }
 
-                lock (_badCharacter)
+                if (defects.Count != 0)
                 {
-                    if (_badCharacter.Count > 0)
+                    foreach (OdeCharacter actor in defects)
                     {
-                        foreach (OdeCharacter chr in _badCharacter)
-                        {
-                            RemoveCharacter(chr);
-                        }
+                        m_log.ErrorFormat(
+                            "[ODE SCENE]: Removing physics character {0} {1} from physics scene {2} due to defect found when updating position and velocity",
+                            actor.Name, actor.LocalID, PhysicsSceneName);
 
-                        _badCharacter.Clear();
+                        RemoveCharacter(actor);
+                        actor.DestroyOdeStructures();
                     }
-                }
 
-                timedif = now - m_lastMeshExpire;
+                    defects.Clear();
+                }
 
-                if (timedif.Seconds > 10)
+                if (CollectStats)
                 {
-                    mesher.ExpireReleaseMeshs();
-                    m_lastMeshExpire = now;
+                    tempTick2 = Util.EnvironmentTickCount();
+                    m_stats[ODEAvatarUpdateFrameMsStatName] += Util.EnvironmentTickCountSubtract(tempTick2, tempTick);
+                    tempTick = tempTick2;
                 }
 
-// information block for in debug breakpoint only
-/*
-                int ntopactivegeoms = d.SpaceGetNumGeoms(ActiveSpace);
-                int ntopstaticgeoms = d.SpaceGetNumGeoms(StaticSpace);
-                int ngroundgeoms = d.SpaceGetNumGeoms(GroundSpace);
-
-                int nactivegeoms = 0;
-                int nactivespaces = 0;
+                //if (timeStep < 0.2f)
 
-                int nstaticgeoms = 0;
-                int nstaticspaces = 0;
-                IntPtr sp;
-
-                for (int i = 0; i < ntopactivegeoms; i++)
+                foreach (OdePrim prim in _activeprims)
                 {
-                    sp = d.SpaceGetGeom(ActiveSpace, i);
-                    if (d.GeomIsSpace(sp))
+                    if (prim.IsPhysical && (d.BodyIsEnabled(prim.Body) || !prim._zeroFlag))
                     {
-                        nactivespaces++;
-                        nactivegeoms += d.SpaceGetNumGeoms(sp);
-                    }
-                    else
-                        nactivegeoms++;
-                }
+                        prim.UpdatePositionAndVelocity();
 
-                for (int i = 0; i < ntopstaticgeoms; i++)
-                {
-                    sp = d.SpaceGetGeom(StaticSpace, i);
-                    if (d.GeomIsSpace(sp))
-                    {
-                        nstaticspaces++;
-                        nstaticgeoms += d.SpaceGetNumGeoms(sp);
+                        if (SupportsNINJAJoints)
+                            SimulateActorPendingJoints(prim);
                     }
-                    else
-                        nstaticgeoms++;
                 }
 
-                int ntopgeoms = d.SpaceGetNumGeoms(TopSpace);
+                if (CollectStats)
+                    m_stats[ODEPrimUpdateFrameMsStatName] += Util.EnvironmentTickCountSubtract(tempTick);
+
+                //DumpJointInfo();
 
-                int totgeoms = nstaticgeoms + nactivegeoms + ngroundgeoms + 1; // one ray
-                int nbodies = d.NTotalBodies;
-                int ngeoms = d.NTotalGeoms;
-*/
                 // Finished with all sim stepping. If requested, dump world state to file for debugging.
                 // TODO: This call to the export function is already inside lock (OdeLock) - but is an extra lock needed?
                 // TODO: This overwrites all dump files in-place. Should this be a growing logfile, or separate snapshots?
@@ -1900,303 +2956,291 @@ namespace OpenSim.Region.PhysicsModule.ubOde
 
                     d.WorldExportDIF(world, fname, physics_logging_append_existing_logfile, prefix);
                 }
-                
-                fps = (float)nodeframes * ODE_STEPSIZE / reqTimeStep;
-
-                if(step_time < HalfOdeStep)
-                    m_timeDilation = 1.0f;
-                else if (step_time > m_SkipFramesAtms)
-                {
-                    // if we lag too much skip frames
-                    m_timeDilation = 0.0f;
-                    step_time = 0;
-                    m_lastframe = DateTime.UtcNow; // skip also the time lost
-                }
-                else
-                {
-                    m_timeDilation = ODE_STEPSIZE / step_time;
-                    if (m_timeDilation > 1)
-                        m_timeDilation = 1;
-                }
-            }
-
-            return fps;
-        }
-
-        /// <summary>
-        public override void GetResults()
-        {
-        }
-
-        public override bool IsThreaded
-        {
-            // for now we won't be multithreaded
-            get { return (false); }
-        }
-
-        public float GetTerrainHeightAtXY(float x, float y)
-        {
-            if (TerrainGeom == IntPtr.Zero)
-                return 0f;
-
-            if (TerrainHeightFieldHeight == null || TerrainHeightFieldHeight.Length == 0)
-                return 0f;
-
-            // TerrainHeightField for ODE as offset 1m
-            x += 1f;
-            y += 1f;
-
-            // make position fit into array
-            if (x < 0)
-                x = 0;
-            if (y < 0)
-                y = 0;
 
-            // integer indexs
-            int ix;
-            int iy;
-            //  interpolators offset
-            float dx;
-            float dy;
+                latertickcount = Util.EnvironmentTickCountSubtract(tickCountFrameRun);
 
-            int regsizeX = (int)m_regionWidth + 3; // map size see setterrain number of samples
-            int regsizeY = (int)m_regionHeight + 3; // map size see setterrain number of samples
-            int regsize = regsizeX;
+                // OpenSimulator above does 10 fps.  10 fps = means that the main thread loop and physics
+                // has a max of 100 ms to run theoretically.
+                // If the main loop stalls, it calls Simulate later which makes the tick count ms larger.
+                // If Physics stalls, it takes longer which makes the tick count ms larger.
 
-            if (m_OSOdeLib)
-            {
-                if (x < regsizeX - 1)
-                {
-                    ix = (int)x;
-                    dx = x - (float)ix;
-                }
-                else // out world use external height
+                if (latertickcount < 100)
                 {
-                    ix = regsizeX - 2;
-                    dx = 0;
-                }
-                if (y < regsizeY - 1)
-                {
-                    iy = (int)y;
-                    dy = y - (float)iy;
+                    m_timeDilation = 1.0f;
                 }
                 else
                 {
-                    iy = regsizeY - 2;
-                    dy = 0;
+                    m_timeDilation = 100f / latertickcount;
+                    //m_timeDilation = Math.Min((Math.Max(100 - (Util.EnvironmentTickCount() - tickCountFrameRun), 1) / 100f), 1.0f);
                 }
-            }
-            else
-            {
-                // we  still have square fixed size regions
-                // also flip x and y because of how map is done for ODE fliped axis
-                // so ix,iy,dx and dy are inter exchanged
 
-                regsize = regsizeY;
+                tickCountFrameRun = Util.EnvironmentTickCount();
 
-                if (x < regsizeX - 1)
-                {
-                    iy = (int)x;
-                    dy = x - (float)iy;
-                }
-                else // out world use external height
-                {
-                    iy = regsizeX - 2;
-                    dy = 0;
-                }
-                if (y < regsizeY - 1)
-                {
-                    ix = (int)y;
-                    dx = y - (float)ix;
-                }
-                else
-                {
-                    ix = regsizeY - 2;
-                    dx = 0;
-                }
+                if (CollectStats)
+                    m_stats[ODETotalFrameMsStatName] += Util.EnvironmentTickCountSubtract(startFrameTick);
             }
 
-            float h0;
-            float h1;
-            float h2;
+            fps *= 1.0f/timeStep;
+            return fps;
+        }
 
-            iy *= regsize;
-            iy += ix; // all indexes have iy + ix
+        /// <summary>
+        /// Simulate pending NINJA joints.
+        /// </summary>
+        /// <remarks>
+        /// Called by the main Simulate() loop if NINJA joints are active.  Should not be called from anywhere else.
+        /// </remarks>
+        private void SimulatePendingNINJAJoints()
+        {
+            // Create pending joints, if possible
+
+            // joints can only be processed after ALL bodies are processed (and exist in ODE), since creating
+            // a joint requires specifying the body id of both involved bodies
+            if (pendingJoints.Count > 0)
+            {
+                List<PhysicsJoint> successfullyProcessedPendingJoints = new List<PhysicsJoint>();
+                //DoJointErrorMessage(joints_connecting_actor, "taint: " + pendingJoints.Count + " pending joints");
+                foreach (PhysicsJoint joint in pendingJoints)
+                {
+                    //DoJointErrorMessage(joint, "taint: time to create joint with parms: " + joint.RawParams);
+                    string[] jointParams = joint.RawParams.Split(" ".ToCharArray(), System.StringSplitOptions.RemoveEmptyEntries);
+                    List<IntPtr> jointBodies = new List<IntPtr>();
+                    bool allJointBodiesAreReady = true;
+                    foreach (string jointParam in jointParams)
+                    {
+                        if (jointParam == "NULL")
+                        {
+                            //DoJointErrorMessage(joint, "attaching NULL joint to world");
+                            jointBodies.Add(IntPtr.Zero);
+                        }
+                        else
+                        {
+                            //DoJointErrorMessage(joint, "looking for prim name: " + jointParam);
+                            bool foundPrim = false;
+                            lock (_prims)
+                            {
+                                foreach (OdePrim prim in _prims) // FIXME: inefficient
+                                {
+                                    if (prim.SOPName == jointParam)
+                                    {
+                                        //DoJointErrorMessage(joint, "found for prim name: " + jointParam);
+                                        if (prim.IsPhysical && prim.Body != IntPtr.Zero)
+                                        {
+                                            jointBodies.Add(prim.Body);
+                                            foundPrim = true;
+                                            break;
+                                        }
+                                        else
+                                        {
+                                            DoJointErrorMessage(joint, "prim name " + jointParam +
+                                                " exists but is not (yet) physical; deferring joint creation. " +
+                                                "IsPhysical property is " + prim.IsPhysical +
+                                                " and body is " + prim.Body);
+                                            foundPrim = false;
+                                            break;
+                                        }
+                                    }
+                                }
+                            }
+                            if (foundPrim)
+                            {
+                                // all is fine
+                            }
+                            else
+                            {
+                                allJointBodiesAreReady = false;
+                                break;
+                            }
+                        }
+                    }
 
-            float[] heights = TerrainHeightFieldHeight;
-            /*
-                        if ((dx + dy) <= 1.0f)
+                    if (allJointBodiesAreReady)
+                    {
+                        //DoJointErrorMessage(joint, "allJointBodiesAreReady for " + joint.ObjectNameInScene + " with parms " + joint.RawParams);
+                        if (jointBodies[0] == jointBodies[1])
                         {
-                            h0 = ((float)heights[iy]); // 0,0 vertice
-                            h1 = (((float)heights[iy + 1]) - h0) * dx; // 1,0 vertice minus 0,0
-                            h2 = (((float)heights[iy + regsize]) - h0) * dy; // 0,1 vertice minus 0,0
+                            DoJointErrorMessage(joint, "ERROR: joint cannot be created; the joint bodies are the same, body1==body2. Raw body is " + jointBodies[0] + ". raw parms: " + joint.RawParams);
                         }
                         else
                         {
-                            h0 = ((float)heights[iy + regsize + 1]); // 1,1 vertice
-                            h1 = (((float)heights[iy + 1]) - h0) * (1 - dy); // 1,1 vertice minus 1,0
-                            h2 = (((float)heights[iy + regsize]) - h0) * (1 - dx); // 1,1 vertice minus 0,1
+                            switch (joint.Type)
+                            {
+                                case PhysicsJointType.Ball:
+                                    {
+                                        IntPtr odeJoint;
+                                        //DoJointErrorMessage(joint, "ODE creating ball joint ");
+                                        odeJoint = d.JointCreateBall(world, IntPtr.Zero);
+                                        //DoJointErrorMessage(joint, "ODE attaching ball joint: " + odeJoint + " with b1:" + jointBodies[0] + " b2:" + jointBodies[1]);
+                                        d.JointAttach(odeJoint, jointBodies[0], jointBodies[1]);
+                                        //DoJointErrorMessage(joint, "ODE setting ball anchor: " + odeJoint + " to vec:" + joint.Position);
+                                        d.JointSetBallAnchor(odeJoint,
+                                                            joint.Position.X,
+                                                            joint.Position.Y,
+                                                            joint.Position.Z);
+                                        //DoJointErrorMessage(joint, "ODE joint setting OK");
+                                        //DoJointErrorMessage(joint, "The ball joint's bodies are here: b0: ");
+                                        //DoJointErrorMessage(joint, "" + (jointBodies[0] != IntPtr.Zero ? "" + d.BodyGetPosition(jointBodies[0]) : "fixed environment"));
+                                        //DoJointErrorMessage(joint, "The ball joint's bodies are here: b1: ");
+                                        //DoJointErrorMessage(joint, "" + (jointBodies[1] != IntPtr.Zero ? "" + d.BodyGetPosition(jointBodies[1]) : "fixed environment"));
+
+                                        if (joint is OdePhysicsJoint)
+                                        {
+                                            ((OdePhysicsJoint)joint).jointID = odeJoint;
+                                        }
+                                        else
+                                        {
+                                            DoJointErrorMessage(joint, "WARNING: non-ode joint in ODE!");
+                                        }
+                                    }
+                                    break;
+                                case PhysicsJointType.Hinge:
+                                    {
+                                        IntPtr odeJoint;
+                                        //DoJointErrorMessage(joint, "ODE creating hinge joint ");
+                                        odeJoint = d.JointCreateHinge(world, IntPtr.Zero);
+                                        //DoJointErrorMessage(joint, "ODE attaching hinge joint: " + odeJoint + " with b1:" + jointBodies[0] + " b2:" + jointBodies[1]);
+                                        d.JointAttach(odeJoint, jointBodies[0], jointBodies[1]);
+                                        //DoJointErrorMessage(joint, "ODE setting hinge anchor: " + odeJoint + " to vec:" + joint.Position);
+                                        d.JointSetHingeAnchor(odeJoint,
+                                                              joint.Position.X,
+                                                              joint.Position.Y,
+                                                              joint.Position.Z);
+                                        // We use the orientation of the x-axis of the joint's coordinate frame
+                                        // as the axis for the hinge.
+
+                                        // Therefore, we must get the joint's coordinate frame based on the
+                                        // joint.Rotation field, which originates from the orientation of the 
+                                        // joint's proxy object in the scene.
+
+                                        // The joint's coordinate frame is defined as the transformation matrix
+                                        // that converts a vector from joint-local coordinates into world coordinates.
+                                        // World coordinates are defined as the XYZ coordinate system of the sim,
+                                        // as shown in the top status-bar of the viewer.
+
+                                        // Once we have the joint's coordinate frame, we extract its X axis (AtAxis)
+                                        // and use that as the hinge axis.
+
+                                        //joint.Rotation.Normalize();
+                                        Matrix4 proxyFrame = Matrix4.CreateFromQuaternion(joint.Rotation);
+
+                                        // Now extract the X axis of the joint's coordinate frame.
+
+                                        // Do not try to use proxyFrame.AtAxis or you will become mired in the
+                                        // tar pit of transposed, inverted, and generally messed-up orientations.
+                                        // (In other words, Matrix4.AtAxis() is borked.)
+                                        // Vector3 jointAxis = proxyFrame.AtAxis; <--- this path leadeth to madness
+
+                                        // Instead, compute the X axis of the coordinate frame by transforming
+                                        // the (1,0,0) vector. At least that works.
+
+                                        //m_log.Debug("PHY: making axis: complete matrix is " + proxyFrame);
+                                        Vector3 jointAxis = Vector3.Transform(Vector3.UnitX, proxyFrame);
+                                        //m_log.Debug("PHY: making axis: hinge joint axis is " + jointAxis);
+                                        //DoJointErrorMessage(joint, "ODE setting hinge axis: " + odeJoint + " to vec:" + jointAxis);
+                                        d.JointSetHingeAxis(odeJoint,
+                                                            jointAxis.X,
+                                                            jointAxis.Y,
+                                                            jointAxis.Z);
+                                        //d.JointSetHingeParam(odeJoint, (int)dParam.CFM, 0.1f);
+                                        if (joint is OdePhysicsJoint)
+                                        {
+                                            ((OdePhysicsJoint)joint).jointID = odeJoint;
+                                        }
+                                        else
+                                        {
+                                            DoJointErrorMessage(joint, "WARNING: non-ode joint in ODE!");
+                                        }
+                                    }
+                                    break;
+                            }
+                            successfullyProcessedPendingJoints.Add(joint);
                         }
-            */
-            h0 = ((float)heights[iy]); // 0,0 vertice
+                    }
+                    else
+                    {
+                        DoJointErrorMessage(joint, "joint could not yet be created; still pending");
+                    }
+                }
 
-            if (dy>dx)
-            {
-                iy += regsize;
-                h2 = (float)heights[iy]; // 0,1 vertice
-                h1 = (h2 - h0) * dy; // 0,1 vertice minus 0,0
-                h2 = ((float)heights[iy + 1] - h2) * dx; // 1,1 vertice minus 0,1
-            }
-            else
-            {
-                iy++;
-                h2 = (float)heights[iy]; // vertice 1,0
-                h1 = (h2 - h0) * dx; // 1,0 vertice minus 0,0
-                h2 = (((float)heights[iy + regsize]) - h2) * dy; // 1,1 vertice minus 1,0
+                foreach (PhysicsJoint successfullyProcessedJoint in successfullyProcessedPendingJoints)
+                {
+                    //DoJointErrorMessage(successfullyProcessedJoint, "finalizing succesfully procsssed joint " + successfullyProcessedJoint.ObjectNameInScene + " parms " + successfullyProcessedJoint.RawParams);
+                    //DoJointErrorMessage(successfullyProcessedJoint, "removing from pending");
+                    InternalRemovePendingJoint(successfullyProcessedJoint);
+                    //DoJointErrorMessage(successfullyProcessedJoint, "adding to active");
+                    InternalAddActiveJoint(successfullyProcessedJoint);
+                    //DoJointErrorMessage(successfullyProcessedJoint, "done");
+                }
             }
-
-            return h0 + h1 + h2;
         }
 
-        public Vector3 GetTerrainNormalAtXY(float x, float y)
+        /// <summary>
+        /// Simulate the joint proxies of a NINJA actor.
+        /// </summary>
+        /// <remarks>
+        /// Called as part of the Simulate() loop if NINJA physics is active.  Must only be called from there.
+        /// </remarks>
+        /// <param name="actor"></param>
+        private void SimulateActorPendingJoints(OdePrim actor)
         {
-            Vector3 norm = new Vector3(0, 0, 1);
-
-            if (TerrainGeom == IntPtr.Zero)
-                return norm;
-
-            if (TerrainHeightFieldHeight == null || TerrainHeightFieldHeight.Length == 0)
-                return norm;
-
-            // TerrainHeightField for ODE as offset 1m
-            x += 1f;
-            y += 1f;
-
-            // make position fit into array
-            if (x < 0)
-                x = 0;
-            if (y < 0)
-                y = 0;
+            // If an actor moved, move its joint proxy objects as well.
+            // There seems to be an event PhysicsActor.OnPositionUpdate that could be used
+            // for this purpose but it is never called! So we just do the joint
+            // movement code here.
 
-            // integer indexs
-            int ix;
-            int iy;
-            //  interpolators offset
-            float dx;
-            float dy;
-
-            int regsizeX = (int)m_regionWidth + 3; // map size see setterrain number of samples
-            int regsizeY = (int)m_regionHeight + 3; // map size see setterrain number of samples
-            int regsize = regsizeX;
-
-            int xstep = 1;
-            int ystep = regsizeX;
-            bool firstTri = false;
-
-            if (m_OSOdeLib)
-            {
-                if (x < regsizeX - 1)
-                {
-                    ix = (int)x;
-                    dx = x - (float)ix;
-                }
-                else // out world use external height
-                {
-                    ix = regsizeX - 2;
-                    dx = 0;
-                }
-                if (y < regsizeY - 1)
-                {
-                    iy = (int)y;
-                    dy = y - (float)iy;
-                }
-                else
-                {
-                    iy = regsizeY - 2;
-                    dy = 0;
-                }
-                firstTri = dy > dx;
-            }
-
-            else
+            if (actor.SOPName != null &&
+                joints_connecting_actor.ContainsKey(actor.SOPName) &&
+                joints_connecting_actor[actor.SOPName] != null &&
+                joints_connecting_actor[actor.SOPName].Count > 0)
             {
-                xstep = regsizeY;
-                ystep = 1;
-                regsize = regsizeY;
-
-                // we  still have square fixed size regions
-                // also flip x and y because of how map is done for ODE fliped axis
-                // so ix,iy,dx and dy are inter exchanged
-                if (x < regsizeX - 1)
+                foreach (PhysicsJoint affectedJoint in joints_connecting_actor[actor.SOPName])
                 {
-                    iy = (int)x;
-                    dy = x - (float)iy;
-                }
-                else // out world use external height
-                {
-                    iy = regsizeX - 2;
-                    dy = 0;
-                }
-                if (y < regsizeY - 1)
-                {
-                    ix = (int)y;
-                    dx = y - (float)ix;
-                }
-                else
-                {
-                    ix = regsizeY - 2;
-                    dx = 0;
+                    if (affectedJoint.IsInPhysicsEngine)
+                    {
+                        DoJointMoved(affectedJoint);
+                    }
+                    else
+                    {
+                        DoJointErrorMessage(affectedJoint, "a body connected to a joint was moved, but the joint doesn't exist yet! this will lead to joint error. joint was: " + affectedJoint.ObjectNameInScene + " parms:" + affectedJoint.RawParams);
+                    }
                 }
-                firstTri = dx > dy;
             }
+        }
 
-            float h0;
-            float h1;
-            float h2;
-
-            iy *= regsize;
-            iy += ix; // all indexes have iy + ix
+        public override void GetResults()
+        {
+        }
 
-            float[] heights = TerrainHeightFieldHeight;
+        public override bool IsThreaded
+        {
+            // for now we won't be multithreaded
+            get { return false; }
+        }
 
-            if (firstTri)
+        public override void SetTerrain(float[] heightMap)
+        {
+            if (m_worldOffset != Vector3.Zero && m_parentScene != null)
             {
-                h1 = ((float)heights[iy]); // 0,0 vertice
-                iy += ystep;
-                h0 = (float)heights[iy]; // 0,1
-                h2 = (float)heights[iy+xstep]; // 1,1 vertice
-                norm.X = h0 - h2;
-                norm.Y = h1 - h0;              
+                if (m_parentScene is OdeScene)
+                {
+                    ((OdeScene)m_parentScene).SetTerrain(heightMap, m_worldOffset);
+                }
             }
             else
             {
-                h2 = ((float)heights[iy]); // 0,0 vertice
-                iy += xstep;
-                h0 = ((float)heights[iy]); // 1,0 vertice
-                h1 = (float)heights[iy+ystep]; // vertice 1,1
-                norm.X = h2 - h0;
-                norm.Y = h0 - h1;
+                SetTerrain(heightMap, m_worldOffset);
             }
-            norm.Z = 1;
-            norm.Normalize();
-            return norm;
         }
 
-        public override void SetTerrain(float[] heightMap)
-        {
-            if (m_OSOdeLib)
-                OSSetTerrain(heightMap);
-            else
-                OriSetTerrain(heightMap);
-        }
-
-        public void OriSetTerrain(float[] heightMap)
+        private void SetTerrain(float[] heightMap, Vector3 pOffset)
         {
-            // assumes 1m size grid and constante size square regions
-            // needs to know about sims around in future
+            int startTime = Util.EnvironmentTickCount();
+            m_log.DebugFormat("[ODE SCENE]: Setting terrain for {0} with offset {1}", PhysicsSceneName, pOffset);
 
+            
             float[] _heightmap;
 
+            // ok im lasy this are just a aliases
             uint regionsizeX = m_regionWidth;
             uint regionsizeY = m_regionHeight;
 
@@ -2214,7 +3258,7 @@ namespace OpenSim.Region.PhysicsModule.ubOde
             const float thickness = 10f;
             const int wrap = 0;
 
- 
+
             float hfmin = float.MaxValue;
             float hfmax = float.MinValue;
             float val;
@@ -2223,11 +3267,13 @@ namespace OpenSim.Region.PhysicsModule.ubOde
 
             uint maxXX = regionsizeX - 1;
             uint maxYY = regionsizeY - 1;
+
             // flipping map adding one margin all around so things don't fall in edges
 
             uint xt = 0;
             xx = 0;
 
+
             for (uint x = 0; x < heightmapWidthSamples; x++)
             {
                 if (x > 1 && xx < maxXX)
@@ -2240,7 +3286,7 @@ namespace OpenSim.Region.PhysicsModule.ubOde
 
                     val = heightMap[yy + xx];
                     if (val < 0.0f)
-                        val = 0.0f; // no neg terrain as in chode
+                        val = 0.0f;
                     _heightmap[xt + y] = val;
 
                     if (hfmin > val)
@@ -2255,164 +3301,69 @@ namespace OpenSim.Region.PhysicsModule.ubOde
             {
                 d.AllocateODEDataForThread(~0U);
 
-                if (TerrainGeom != IntPtr.Zero)
+                IntPtr GroundGeom = IntPtr.Zero;
+                if (RegionTerrain.TryGetValue(pOffset, out GroundGeom))
                 {
-                    actor_name_map.Remove(TerrainGeom);
-                    d.GeomDestroy(TerrainGeom);
+                    RegionTerrain.Remove(pOffset);
+                    if (GroundGeom != IntPtr.Zero)
+                    {
+                        if (TerrainHeightFieldHeights.ContainsKey(GroundGeom))
+                        {
+                            TerrainHeightFieldHeights.Remove(GroundGeom);
+                        }
+                        d.SpaceRemove(space, GroundGeom);
+                        d.GeomDestroy(GroundGeom);
+                    }
 
                 }
-
-                if (TerrainHeightFieldHeightsHandler.IsAllocated)
-                    TerrainHeightFieldHeightsHandler.Free();
-
                 IntPtr HeightmapData = d.GeomHeightfieldDataCreate();
-
-                TerrainHeightFieldHeightsHandler = GCHandle.Alloc(_heightmap, GCHandleType.Pinned);
-
-                d.GeomHeightfieldDataBuildSingle(HeightmapData, TerrainHeightFieldHeightsHandler.AddrOfPinnedObject(), 0,
-                                                heightmapHeight, heightmapWidth ,
-                                                 (int)heightmapHeightSamples, (int)heightmapWidthSamples, scale,
-                                                offset, thickness, wrap);
+                d.GeomHeightfieldDataBuildSingle(HeightmapData, _heightmap, 0,
+                            heightmapWidth, heightmapHeight,
+                            (int)heightmapWidthSamples,
+                            (int)heightmapHeightSamples,
+                            scale, offset, thickness, wrap);
 
                 d.GeomHeightfieldDataSetBounds(HeightmapData, hfmin - 1, hfmax + 1);
-
-                TerrainGeom = d.CreateHeightfield(GroundSpace, HeightmapData, 1);
-
-                if (TerrainGeom != IntPtr.Zero)
+                GroundGeom = d.CreateHeightfield(space, HeightmapData, 1);
+                if (GroundGeom != IntPtr.Zero)
                 {
-                    d.GeomSetCategoryBits(TerrainGeom, (uint)(CollisionCategories.Land));
-                    d.GeomSetCollideBits(TerrainGeom, 0);
-
-                    PhysicsActor pa = new NullPhysicsActor();
-                    pa.Name = "Terrain";
-                    pa.PhysicsActorType = (int)ActorTypes.Ground;
-                    actor_name_map[TerrainGeom] = pa;
-
-//                    geom_name_map[GroundGeom] = "Terrain";
-
-                    d.Quaternion q = new d.Quaternion();
-                    q.X = 0.5f;
-                    q.Y = 0.5f;
-                    q.Z = 0.5f;
-                    q.W = 0.5f;
+                    d.GeomSetCategoryBits(GroundGeom, (int)(CollisionCategories.Land));
+                    d.GeomSetCollideBits(GroundGeom, (int)(CollisionCategories.Space));
 
-                    d.GeomSetQuaternion(TerrainGeom, ref q);
-                    d.GeomSetPosition(TerrainGeom, m_regionWidth * 0.5f, m_regionHeight * 0.5f, 0.0f);
-                    TerrainHeightFieldHeight = _heightmap;
                 }
-                else
-                    TerrainHeightFieldHeightsHandler.Free();
-            }
-        }
+                geom_name_map[GroundGeom] = "Terrain";
 
-        public void OSSetTerrain(float[] heightMap)
-        {
-            // assumes 1m size grid and constante size square regions
-            // needs to know about sims around in future
-
-            float[] _heightmap;
+                d.Matrix3 R = new d.Matrix3();
 
-            uint regionsizeX = m_regionWidth;
-            uint regionsizeY = m_regionHeight;
-
-            uint heightmapWidth = regionsizeX + 2;
-            uint heightmapHeight = regionsizeY + 2;
-
-            uint heightmapWidthSamples = heightmapWidth + 1;
-            uint heightmapHeightSamples = heightmapHeight + 1;
-
-            _heightmap = new float[heightmapWidthSamples * heightmapHeightSamples];
-
-
-            float hfmin = float.MaxValue;
-//            float hfmax = float.MinValue;
-            float val;
-
-
-            uint maxXX = regionsizeX - 1;
-            uint maxYY = regionsizeY - 1;
-            // adding one margin all around so things don't fall in edges
+                Quaternion q1 = Quaternion.CreateFromAxisAngle(new Vector3(1, 0, 0), 1.5707f);
+                Quaternion q2 = Quaternion.CreateFromAxisAngle(new Vector3(0, 1, 0), 1.5707f);
 
-            uint xx;
-            uint yy = 0;
-            uint yt = 0;
+                q1 = q1 * q2;
+                Vector3 v3;
+                float angle;
+                q1.GetAxisAngle(out v3, out angle);
 
-            for (uint y = 0; y < heightmapHeightSamples; y++)
-            {
-                if (y > 1 && y < maxYY)
-                    yy += regionsizeX;
-                xx = 0;
-                for (uint x = 0; x < heightmapWidthSamples; x++)
+                d.RFromAxisAndAngle(out R, v3.X, v3.Y, v3.Z, angle);
+                d.GeomSetRotation(GroundGeom, ref R);
+                d.GeomSetPosition(GroundGeom, pOffset.X + regionsizeX * 0.5f, pOffset.Y + regionsizeY * 0.5f, 0.0f);
+                IntPtr testGround = IntPtr.Zero;
+                if (RegionTerrain.TryGetValue(pOffset, out testGround))
                 {
-                    if (x > 1 && x < maxXX)
-                        xx++;
-
-                    val = heightMap[yy + xx];
-                    if (val < 0.0f)
-                        val = 0.0f; // no neg terrain as in chode
-                    _heightmap[yt + x] = val;
-
-                    if (hfmin > val)
-                        hfmin = val;
-//                    if (hfmax < val)
-//                        hfmax = val;
+                    RegionTerrain.Remove(pOffset);
                 }
-                yt += heightmapWidthSamples;
+                RegionTerrain.Add(pOffset, GroundGeom, GroundGeom);
+                TerrainHeightFieldHeights.Add(GroundGeom,_heightmap);
             }
 
-            lock (OdeLock)
-            {
-                if (TerrainGeom != IntPtr.Zero)
-                {
-                    actor_name_map.Remove(TerrainGeom);
-                    d.GeomDestroy(TerrainGeom);
-                }
-
-                if (TerrainHeightFieldHeightsHandler.IsAllocated)
-                            TerrainHeightFieldHeightsHandler.Free();
-
-                TerrainHeightFieldHeight = null;
-
-                IntPtr HeightmapData = d.GeomOSTerrainDataCreate();
-
-                const int wrap = 0;
-                float thickness = hfmin;
-                if (thickness < 0)
-                    thickness = 1;
-
-                TerrainHeightFieldHeightsHandler = GCHandle.Alloc(_heightmap, GCHandleType.Pinned);
-
-                d.GeomOSTerrainDataBuild(HeightmapData, TerrainHeightFieldHeightsHandler.AddrOfPinnedObject(), 0, 1.0f,
-                                                 (int)heightmapWidthSamples, (int)heightmapHeightSamples,
-                                                 thickness, wrap);
-
-//                d.GeomOSTerrainDataSetBounds(HeightmapData, hfmin - 1, hfmax + 1);
-                TerrainGeom = d.CreateOSTerrain(GroundSpace, HeightmapData, 1);
-                if (TerrainGeom != IntPtr.Zero)
-                {
-                    d.GeomSetCategoryBits(TerrainGeom, (uint)(CollisionCategories.Land));
-                    d.GeomSetCollideBits(TerrainGeom, 0);
-
-                    PhysicsActor pa = new NullPhysicsActor();
-                    pa.Name = "Terrain";
-                    pa.PhysicsActorType = (int)ActorTypes.Ground;
-                    actor_name_map[TerrainGeom] = pa;
-
-//                    geom_name_map[GroundGeom] = "Terrain";
-
-                    d.GeomSetPosition(TerrainGeom, m_regionWidth * 0.5f, m_regionHeight * 0.5f, 0.0f);
-                    TerrainHeightFieldHeight = _heightmap;
-                 }
-                 else
-                    TerrainHeightFieldHeightsHandler.Free();
-            }
+            m_log.DebugFormat(
+                "[ODE SCENE]: Setting terrain for {0} took {1}ms", PhysicsSceneName, Util.EnvironmentTickCountSubtract(startTime));
         }
 
         public override void DeleteTerrain()
         {
         }
 
-        public float GetWaterLevel()
+        internal float GetWaterLevel()
         {
             return waterlevel;
         }
@@ -2422,18 +3373,18 @@ namespace OpenSim.Region.PhysicsModule.ubOde
             waterlevel = baseheight;
         }
 
+        [HandleProcessCorruptedStateExceptions]
         public override void Dispose()
         {
-            lock (OdeLock)
+            lock(SimulationLock)
+                lock(OdeLock)
             {
-
-                if (world == IntPtr.Zero)
+                if(world == IntPtr.Zero)
                     return;
 
-                d.AllocateODEDataForThread(~0U);
+                _worldInitialized = false;
 
-                if (m_meshWorker != null)
-                    m_meshWorker.Stop();
+                d.AllocateODEDataForThread(~0U);
 
                 if (m_rayCastManager != null)
                 {
@@ -2443,49 +3394,37 @@ namespace OpenSim.Region.PhysicsModule.ubOde
 
                 lock (_prims)
                 {
-                    ChangesQueue.Clear();
-                    foreach (OdePrim prm in _prims.Values)
+                    foreach (OdePrim prm in _prims)
                     {
-                        prm.DoAChange(changes.Remove, null);
-                        _collisionEventPrim.Remove(prm);
+                        RemovePrim(prm);
                     }
-                    _prims.Clear();
                 }
 
-                OdeCharacter[] chtorem;
-                lock (_characters)
+                //foreach (OdeCharacter act in _characters)
+                //{
+                    //RemoveAvatar(act);
+                //}
+                IntPtr GroundGeom = IntPtr.Zero;
+                if (RegionTerrain.TryGetValue(m_worldOffset, out GroundGeom))
                 {
-                    chtorem = new OdeCharacter[_characters.Count];
-                    _characters.CopyTo(chtorem);
-                }
-
-                ChangesQueue.Clear();
-                foreach (OdeCharacter ch in chtorem)
-                    ch.DoAChange(changes.Remove, null);
-
-                if (TerrainGeom != IntPtr.Zero)
-                        d.GeomDestroy(TerrainGeom);
-                TerrainGeom = IntPtr.Zero;
-
-                if (TerrainHeightFieldHeightsHandler.IsAllocated)
-                    TerrainHeightFieldHeightsHandler.Free();
-
-                TerrainHeightFieldHeight = null;
+                    RegionTerrain.Remove(m_worldOffset);
+                    if (GroundGeom != IntPtr.Zero)
+                    {
+                        if (TerrainHeightFieldHeights.ContainsKey(GroundGeom))
+                            TerrainHeightFieldHeights.Remove(GroundGeom);
+                        d.GeomDestroy(GroundGeom);
+                    }
+                 }
 
-                if (ContactgeomsArray != IntPtr.Zero)
+                try
                 {
-                    Marshal.FreeHGlobal(ContactgeomsArray);
-                    ContactgeomsArray = IntPtr.Zero;
+                    d.WorldDestroy(world);
+                    world = IntPtr.Zero;
                 }
-                if (GlobalContactsArray != IntPtr.Zero)
+                catch (AccessViolationException e)
                 {
-                    Marshal.FreeHGlobal(GlobalContactsArray);
-                    GlobalContactsArray = IntPtr.Zero;
+                    m_log.ErrorFormat("[ODE SCENE]: exception {0}", e.Message);
                 }
-
-                d.WorldDestroy(world);
-                world = IntPtr.Zero;
-                //d.CloseODE();
             }
         }
 
@@ -2497,13 +3436,17 @@ namespace OpenSim.Region.PhysicsModule.ubOde
         public override Dictionary<uint, float> GetTopColliders()
         {
             Dictionary<uint, float> topColliders;
-            List<OdePrim> orderedPrims;
-            lock (_activeprims)
-                orderedPrims = new List<OdePrim>(_activeprims);
 
-            orderedPrims.Sort(compareByCollisionsDesc);
-            topColliders = orderedPrims.Take(25).ToDictionary(p => p.LocalID, p => p.CollisionScore);
-           
+            lock (_prims)
+            {
+                List<OdePrim> orderedPrims = new List<OdePrim>(_prims);
+                orderedPrims.Sort(compareByCollisionsDesc);
+                topColliders = orderedPrims.Take(25).ToDictionary(p => p.LocalID, p => p.CollisionScore);
+
+                foreach (OdePrim p in _prims)
+                    p.CollisionScore = 0;
+            }
+
             return topColliders;
         }
 
@@ -2516,16 +3459,7 @@ namespace OpenSim.Region.PhysicsModule.ubOde
         {
             if (retMethod != null)
             {
-                ODERayRequest req = new ODERayRequest();
-                req.actor = null;
-                req.callbackMethod = retMethod;
-                req.length = length;
-                req.Normal = direction;
-                req.Origin = position;
-                req.Count = 0;
-                req.filter = RayFilterFlags.AllPrims;
-
-                m_rayCastManager.QueueRequest(req);
+                m_rayCastManager.QueueRequest(position, direction, length, retMethod);
             }
         }
 
@@ -2533,260 +3467,75 @@ namespace OpenSim.Region.PhysicsModule.ubOde
         {
             if (retMethod != null)
             {
-                ODERayRequest req = new ODERayRequest();
-                req.actor = null;
-                req.callbackMethod = retMethod;
-                req.length = length;
-                req.Normal = direction;
-                req.Origin = position;
-                req.Count = Count;
-                req.filter = RayFilterFlags.AllPrims;
-
-                m_rayCastManager.QueueRequest(req);
+                m_rayCastManager.QueueRequest(position, direction, length, Count, retMethod);
             }
         }
 
-       
         public override List<ContactResult> RaycastWorld(Vector3 position, Vector3 direction, float length, int Count)
         {
-            List<ContactResult> ourresults = new List<ContactResult>();
-            object SyncObject = new object();
-
+            ContactResult[] ourResults = null;
             RayCallback retMethod = delegate(List<ContactResult> results)
             {
-                lock (SyncObject)
-                {
-                    ourresults = results;
-                    Monitor.PulseAll(SyncObject);
-                }
+                ourResults = new ContactResult[results.Count];
+                results.CopyTo(ourResults, 0);
             };
-
-            ODERayRequest req = new ODERayRequest();
-            req.actor = null;
-            req.callbackMethod = retMethod;
-            req.length = length;
-            req.Normal = direction;
-            req.Origin = position;
-            req.Count = Count;
-            req.filter = RayFilterFlags.AllPrims;
-
-            lock (SyncObject)
+            int waitTime = 0;
+            m_rayCastManager.QueueRequest(position, direction, length, Count, retMethod);
+            while (ourResults == null && waitTime < 1000)
             {
-                m_rayCastManager.QueueRequest(req);
-                if (!Monitor.Wait(SyncObject, 500))
-                    return null;
-                else
-                    return ourresults;
+                Thread.Sleep(1);
+                waitTime++;
             }
-        }
-
-        public override bool SupportsRaycastWorldFiltered()
-        {
-            return true;
-        }
-
-        public override object RaycastWorld(Vector3 position, Vector3 direction, float length, int Count, RayFilterFlags filter)
-        {
-            object SyncObject = new object();
-            List<ContactResult> ourresults = new List<ContactResult>();
-
-            RayCallback retMethod = delegate(List<ContactResult> results)
-            {
-                lock (SyncObject)
-                {
-                    ourresults = results;
-                    Monitor.PulseAll(SyncObject);
-                }
-            };
-
-            ODERayRequest req = new ODERayRequest();
-            req.actor = null;
-            req.callbackMethod = retMethod;
-            req.length = length;
-            req.Normal = direction;
-            req.Origin = position;
-            req.Count = Count;
-            req.filter = filter;
-
-            lock (SyncObject)
-            {
-                m_rayCastManager.QueueRequest(req);
-                if (!Monitor.Wait(SyncObject, 500))
-                    return null;
-                else
-                    return ourresults;
-            }
-        }
-
-        public override List<ContactResult> RaycastActor(PhysicsActor actor, Vector3 position, Vector3 direction, float length, int Count, RayFilterFlags flags)
-        {
-            if (actor == null)
-                return new List<ContactResult>();
-
-            IntPtr geom;
-            if (actor is OdePrim)
-                geom = ((OdePrim)actor).prim_geom;
-            else if (actor is OdeCharacter)
-                geom = ((OdePrim)actor).prim_geom;
-            else
-                return new List<ContactResult>();
-
-            if (geom == IntPtr.Zero)
-                return new List<ContactResult>();
-
-            List<ContactResult> ourResults = null;
-            object SyncObject = new object();
-
-            RayCallback retMethod = delegate(List<ContactResult> results)
-            {
-                lock (SyncObject)
-                {
-                    ourResults = results;
-                    Monitor.PulseAll(SyncObject);
-                }
-            };
-
-            ODERayRequest req = new ODERayRequest();
-            req.actor = actor;
-            req.callbackMethod = retMethod;
-            req.length = length;
-            req.Normal = direction;
-            req.Origin = position;
-            req.Count = Count;
-            req.filter = flags;
-
-            lock (SyncObject)
-            {
-                m_rayCastManager.QueueRequest(req);
-                if (!Monitor.Wait(SyncObject, 500))
-                    return new List<ContactResult>();
-            }
-
-            if (ourResults == null)
-                return new List<ContactResult>();
-            return ourResults;
-        }
-
-        public override List<ContactResult> BoxProbe(Vector3 position, Vector3 size, Quaternion orientation, int Count, RayFilterFlags flags)
-        {
-            List<ContactResult> ourResults = null;
-            object SyncObject = new object();
-
-            ProbeBoxCallback retMethod = delegate(List<ContactResult> results)
-            {
-                lock (SyncObject)
-                {
-                    ourResults = results;
-                    Monitor.PulseAll(SyncObject);
-                }
-            };
-
-            ODERayRequest req = new ODERayRequest();
-            req.actor = null;
-            req.callbackMethod = retMethod;
-            req.Normal = size;
-            req.Origin = position;
-            req.orientation = orientation;
-            req.Count = Count;
-            req.filter = flags;
-
-            lock (SyncObject)
-            {
-                m_rayCastManager.QueueRequest(req);
-                if (!Monitor.Wait(SyncObject, 500))
-                    return new List<ContactResult>();
-            }
-
             if (ourResults == null)
-                return new List<ContactResult>();
-            return ourResults;
+                return new List<ContactResult> ();
+            return new List<ContactResult>(ourResults);
         }
 
-        public override List<ContactResult> SphereProbe(Vector3 position, float radius, int Count, RayFilterFlags flags)
+        public override Dictionary<string, float> GetStats()
         {
-            List<ContactResult> ourResults = null;
-            object SyncObject = new object();
+            if (!CollectStats)
+                return null;
 
-            ProbeSphereCallback retMethod = delegate(List<ContactResult> results)
-            {
-                ourResults = results;
-                Monitor.PulseAll(SyncObject);
-            };
-
-            ODERayRequest req = new ODERayRequest();
-            req.actor = null;
-            req.callbackMethod = retMethod;
-            req.length = radius;
-            req.Origin = position;
-            req.Count = Count;
-            req.filter = flags;
+            Dictionary<string, float> returnStats;
 
-
-            lock (SyncObject)
+            lock (OdeLock)
             {
-                m_rayCastManager.QueueRequest(req);
-                if (!Monitor.Wait(SyncObject, 500))
-                    return new List<ContactResult>();
-            }
+                returnStats = new Dictionary<string, float>(m_stats);
 
-            if (ourResults == null)
-                return new List<ContactResult>();
-            return ourResults;
-        }
+                // FIXME: This is a SUPER DUMB HACK until we can establish stats that aren't subject to a division by
+                // 3 from the SimStatsReporter.
+                returnStats[ODETotalAvatarsStatName] = _characters.Count * 3;
+                returnStats[ODETotalPrimsStatName] = _prims.Count * 3;
+                returnStats[ODEActivePrimsStatName] = _activeprims.Count * 3;
 
-        public override List<ContactResult> PlaneProbe(PhysicsActor actor, Vector4 plane, int Count, RayFilterFlags flags)
-        {
-            IntPtr geom = IntPtr.Zero;;
-
-            if (actor != null)
-            {
-                if (actor is OdePrim)
-                    geom = ((OdePrim)actor).prim_geom;
-                else if (actor is OdeCharacter)
-                    geom = ((OdePrim)actor).prim_geom;
+                InitializeExtraStats();
             }
 
-            List<ContactResult> ourResults = null;
-            object SyncObject = new object();
+            returnStats[ODEOtherCollisionFrameMsStatName]
+                = returnStats[ODEOtherCollisionFrameMsStatName]
+                    - returnStats[ODENativeSpaceCollisionFrameMsStatName]
+                    - returnStats[ODENativeGeomCollisionFrameMsStatName];
 
-            ProbePlaneCallback retMethod = delegate(List<ContactResult> results)
-            {
-                ourResults = results;
-                Monitor.PulseAll(SyncObject);
-            };
-
-            ODERayRequest req = new ODERayRequest();
-            req.actor = null;
-            req.callbackMethod = retMethod;
-            req.length = plane.W;
-            req.Normal.X = plane.X;
-            req.Normal.Y = plane.Y;
-            req.Normal.Z = plane.Z;
-            req.Count = Count;
-            req.filter = flags;
-
-            lock (SyncObject)
-            {
-                m_rayCastManager.QueueRequest(req);
-                if (!Monitor.Wait(SyncObject, 500))
-                    return new List<ContactResult>();
-            }
-
-            if (ourResults == null)
-                return new List<ContactResult>();
-            return ourResults;
+            return returnStats;
         }
 
-        public override int SitAvatar(PhysicsActor actor, Vector3 AbsolutePosition, Vector3 CameraPosition, Vector3 offset, Vector3 AvatarSize, SitAvatarCallback PhysicsSitResponse)
+        private void InitializeExtraStats()
         {
-            Util.FireAndForget( delegate
-            {
-                ODESitAvatar sitAvatar = new ODESitAvatar(this, m_rayCastManager);
-                if(sitAvatar != null)
-                    sitAvatar.Sit(actor, AbsolutePosition, CameraPosition, offset, AvatarSize, PhysicsSitResponse);
-            });
-            return 1;
+            m_stats[ODETotalFrameMsStatName] = 0;
+            m_stats[ODEAvatarTaintMsStatName] = 0;
+            m_stats[ODEPrimTaintMsStatName] = 0;
+            m_stats[ODEAvatarForcesFrameMsStatName] = 0;
+            m_stats[ODEPrimForcesFrameMsStatName] = 0;
+            m_stats[ODERaycastingFrameMsStatName] = 0;
+            m_stats[ODENativeStepFrameMsStatName] = 0;
+            m_stats[ODENativeSpaceCollisionFrameMsStatName] = 0;
+            m_stats[ODENativeGeomCollisionFrameMsStatName] = 0;
+            m_stats[ODEOtherCollisionFrameMsStatName] = 0;
+            m_stats[ODECollisionNotificationFrameMsStatName] = 0;
+            m_stats[ODEAvatarContactsStatsName] = 0;
+            m_stats[ODEPrimContactsStatName] = 0;
+            m_stats[ODEAvatarUpdateFrameMsStatName] = 0;
+            m_stats[ODEPrimUpdateFrameMsStatName] = 0;
         }
-
     }
 }
diff --git a/OpenSim/Region/PhysicsModules/ubOde/ODEScene.cs b/OpenSim/Region/PhysicsModules/ubOde/ODEScene.cs
index f642699..410463c 100644
--- a/OpenSim/Region/PhysicsModules/ubOde/ODEScene.cs
+++ b/OpenSim/Region/PhysicsModules/ubOde/ODEScene.cs
@@ -2267,8 +2267,6 @@ namespace OpenSim.Region.PhysicsModule.ubOde
 
                 IntPtr HeightmapData = d.GeomHeightfieldDataCreate();
 
-                GC.Collect(1);
-
                 TerrainHeightFieldHeightsHandler = GCHandle.Alloc(_heightmap, GCHandleType.Pinned);
 
                 d.GeomHeightfieldDataBuildSingle(HeightmapData, TerrainHeightFieldHeightsHandler.AddrOfPinnedObject(), 0,