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diff --git a/OpenSim/Region/PhysicsModules/ubOde/ODEPrim.cs b/OpenSim/Region/PhysicsModules/ubOde/ODEPrim.cs
new file mode 100644
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+++ b/OpenSim/Region/PhysicsModules/ubOde/ODEPrim.cs
@@ -0,0 +1,4256 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Revised August 26 2009 by Kitto Flora. ODEDynamics.cs replaces
+ * ODEVehicleSettings.cs. It and ODEPrim.cs are re-organised:
+ * ODEPrim.cs contains methods dealing with Prim editing, Prim
+ * characteristics and Kinetic motion.
+ * ODEDynamics.cs contains methods dealing with Prim Physical motion
+ * (dynamics) and the associated settings. Old Linear and angular
+ * motors for dynamic motion have been replace with  MoveLinear()
+ * and MoveAngular(); 'Physical' is used only to switch ODE dynamic
+ * simualtion on/off; VEHICAL_TYPE_NONE/VEHICAL_TYPE_<other> is to
+ * switch between 'VEHICLE' parameter use and general dynamics
+ * settings use.
+ */
+
+//#define SPAM
+
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+using System.Runtime.InteropServices;
+using System.Threading;
+using log4net;
+using OpenMetaverse;
+using OdeAPI;
+using OpenSim.Framework;
+using OpenSim.Region.PhysicsModules.SharedBase;
+
+namespace OpenSim.Region.PhysicsModule.ubOde
+{
+    public class OdePrim : PhysicsActor
+    {
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        private bool m_isphysical;
+        private bool m_fakeisphysical;
+        private bool m_isphantom;
+        private bool m_fakeisphantom;
+        internal bool m_isVolumeDetect; // If true, this prim only detects collisions but doesn't collide actively
+        private bool m_fakeisVolumeDetect; // If true, this prim only detects collisions but doesn't collide actively
+
+        internal bool m_building;
+        protected bool m_forcePosOrRotation;
+        private bool m_iscolliding;
+
+        internal bool m_isSelected;
+        private bool m_delaySelect;
+        private bool m_lastdoneSelected;
+        internal bool m_outbounds;
+
+        private byte m_angularlocks = 0;
+
+        private Quaternion m_lastorientation;
+        private Quaternion _orientation;
+
+        private Vector3 _position;
+        private Vector3 _velocity;
+        private Vector3 m_lastVelocity;
+        private Vector3 m_lastposition;
+        private Vector3 m_rotationalVelocity;
+        private Vector3 _size;
+        private Vector3 m_acceleration;
+        private IntPtr Amotor;
+
+        internal Vector3 m_force;
+        internal Vector3 m_forceacc;
+        internal Vector3 m_torque;
+        internal Vector3 m_angularForceacc;
+
+        private float m_invTimeStep;
+        private float m_timeStep;
+
+        private Vector3 m_PIDTarget;
+        private float m_PIDTau;
+        private bool m_usePID;
+
+        private float m_PIDHoverHeight;
+        private float m_PIDHoverTau;
+        private bool m_useHoverPID;
+        private PIDHoverType m_PIDHoverType;
+        private float m_targetHoverHeight;
+        private float m_groundHeight;
+        private float m_waterHeight;
+        private float m_buoyancy;                //KF: m_buoyancy should be set by llSetBuoyancy() for non-vehicle.
+
+        private int m_body_autodisable_frames;
+        public int m_bodydisablecontrol = 0;
+        private float m_gravmod = 1.0f;
+
+        // Default we're a Geometry
+        private CollisionCategories m_collisionCategories = (CollisionCategories.Geom);
+        // Default colide nonphysical don't try to colide with anything
+        private const CollisionCategories m_default_collisionFlagsNotPhysical = 0;
+
+        private const CollisionCategories m_default_collisionFlagsPhysical = (CollisionCategories.Geom |
+                                        CollisionCategories.Character |
+                                        CollisionCategories.Land |
+                                        CollisionCategories.VolumeDtc);
+
+//        private bool m_collidesLand = true;
+        private bool m_collidesWater;
+//        public bool m_returnCollisions;
+
+        private bool m_NoColide;  // for now only for internal use for bad meshs
+
+
+        // Default, Collide with Other Geometries, spaces and Bodies
+        private CollisionCategories m_collisionFlags = m_default_collisionFlagsNotPhysical;
+
+        public bool m_disabled;
+
+        private uint m_localID;
+
+        private IMesh m_mesh;
+        private object m_meshlock = new object();
+        private PrimitiveBaseShape _pbs;
+
+        private UUID? m_assetID;
+        private MeshState m_meshState;
+
+        public ODEScene _parent_scene;
+
+        /// <summary>
+        /// The physics space which contains prim geometry
+        /// </summary>
+        public IntPtr m_targetSpace;
+
+        public IntPtr prim_geom;
+        public IntPtr _triMeshData;
+
+        private PhysicsActor _parent;
+
+        private List<OdePrim> childrenPrim = new List<OdePrim>();
+
+        public float m_collisionscore;
+        private int m_colliderfilter = 0;
+
+        public IntPtr collide_geom; // for objects: geom if single prim space it linkset
+
+        private float m_density;
+        private byte m_shapetype;
+        private byte m_fakeShapetype;
+        public bool _zeroFlag;
+        private bool m_lastUpdateSent;
+
+        public IntPtr Body;
+
+        private Vector3 _target_velocity;
+
+        public Vector3 m_OBBOffset;
+        public Vector3 m_OBB;
+        public float primOOBradiusSQ;
+
+        private bool m_hasOBB = true;
+
+        private float m_physCost;
+        private float m_streamCost;
+
+        public d.Mass primdMass; // prim inertia information on it's own referencial
+        private PhysicsInertiaData m_InertiaOverride;
+        float primMass; // prim own mass
+        float primVolume; // prim own volume;
+        float m_mass; // object mass acording to case
+
+        public int givefakepos;
+        private Vector3 fakepos;
+        public int givefakeori;
+        private Quaternion fakeori;
+        private PhysicsInertiaData m_fakeInertiaOverride;
+
+        private int m_eventsubscription;
+        private int m_cureventsubscription;
+        private CollisionEventUpdate CollisionEventsThisFrame = null;
+        private CollisionEventUpdate CollisionVDTCEventsThisFrame = null;
+        private bool SentEmptyCollisionsEvent;
+
+        public volatile bool childPrim;
+
+        public ODEDynamics m_vehicle;
+
+        internal int m_material = (int)Material.Wood;
+        private float mu;
+        private float bounce;
+
+        /// <summary>
+        /// Is this prim subject to physics?  Even if not, it's still solid for collision purposes.
+        /// </summary>
+        public override bool IsPhysical  // this is not reliable for internal use
+        {
+            get { return m_fakeisphysical; }
+            set
+            {
+                m_fakeisphysical = value; // we show imediatly to outside that we changed physical
+                // and also to stop imediatly some updates
+                // but real change will only happen in taintprocessing
+
+                if (!value) // Zero the remembered last velocity
+                    m_lastVelocity = Vector3.Zero;
+                AddChange(changes.Physical, value);
+            }
+        }
+
+        public override bool IsVolumeDtc
+        {
+            get { return m_fakeisVolumeDetect; }
+            set
+            {
+                m_fakeisVolumeDetect = value;
+                AddChange(changes.VolumeDtc, value);
+            }
+        }
+
+        public override bool Phantom  // this is not reliable for internal use
+        {
+            get { return m_fakeisphantom; }
+            set
+            {
+                m_fakeisphantom = value;
+                AddChange(changes.Phantom, value);
+            }
+        }
+
+        public override bool Building  // this is not reliable for internal use
+        {
+            get { return m_building; }
+            set
+            {
+//                if (value)
+//                    m_building = true;
+                AddChange(changes.building, value);
+            }
+        }
+
+        public override void getContactData(ref ContactData cdata)
+        {
+            cdata.mu = mu;
+            cdata.bounce = bounce;
+
+            //            cdata.softcolide = m_softcolide;
+            cdata.softcolide = false;
+
+            if (m_isphysical)
+            {
+                ODEDynamics veh;
+                if (_parent != null)
+                    veh = ((OdePrim)_parent).m_vehicle;
+                else
+                    veh = m_vehicle;
+
+                if (veh != null && veh.Type != Vehicle.TYPE_NONE)
+                    cdata.mu *= veh.FrictionFactor;
+//                    cdata.mu *= 0;
+            }
+        }
+
+        public override float PhysicsCost
+        {
+            get
+            {
+                return m_physCost;
+            }
+        }
+
+        public override float StreamCost
+        {
+            get
+            {
+                return m_streamCost;
+            }
+        }
+
+        public override int PhysicsActorType
+        {
+            get { return (int)ActorTypes.Prim; }
+            set { return; }
+        }
+
+        public override bool SetAlwaysRun
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override uint LocalID
+        {
+            get { return m_localID; }
+            set
+            {
+                uint oldid = m_localID;
+                m_localID = value;
+                _parent_scene.changePrimID(this, oldid);
+            }
+        }
+
+        public override PhysicsActor ParentActor
+        {
+            get
+            {
+                if (childPrim)
+                    return _parent;
+                else
+                    return (PhysicsActor)this;
+            }
+        }
+
+        public override bool Grabbed
+        {
+            set { return; }
+        }
+
+        public override bool Selected
+        {
+            set
+            {
+                if (value)
+                    m_isSelected = value; // if true set imediatly to stop moves etc
+                AddChange(changes.Selected, value);
+            }
+        }
+
+        public override bool Flying
+        {
+            // no flying prims for you
+            get { return false; }
+            set { }
+        }
+
+        public override bool IsColliding
+        {
+            get { return m_iscolliding; }
+            set
+            {
+                if (value)
+                {
+                    m_colliderfilter += 2;
+                    if (m_colliderfilter > 2)
+                        m_colliderfilter = 2;
+                }
+                else
+                {
+                    m_colliderfilter--;
+                    if (m_colliderfilter < 0)
+                        m_colliderfilter = 0;
+                }
+
+                if (m_colliderfilter == 0)
+                    m_iscolliding = false;
+                else
+                    m_iscolliding = true;
+            }
+        }
+
+        public override bool CollidingGround
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override bool CollidingObj
+        {
+            get { return false; }
+            set { return; }
+        }
+
+
+        public override bool ThrottleUpdates {get;set;}
+
+        public override bool Stopped
+        {
+            get { return _zeroFlag; }
+        }
+
+        public override Vector3 Position
+        {
+            get
+            {
+                if (givefakepos > 0)
+                    return fakepos;
+                else
+                    return _position;
+            }
+
+            set
+            {
+                fakepos = value;
+                givefakepos++;
+                AddChange(changes.Position, value);
+            }
+        }
+
+        public override Vector3 Size
+        {
+            get { return _size; }
+            set
+            {
+                if (value.IsFinite())
+                {
+                     _parent_scene.m_meshWorker.ChangeActorPhysRep(this, _pbs, value, m_fakeShapetype);
+                }
+                else
+                {
+                    m_log.WarnFormat("[PHYSICS]: Got NaN Size on object {0}", Name);
+                }
+            }
+        }
+
+        public override float Mass
+        {
+            get { return primMass; }
+        }
+
+        public override Vector3 Force
+        {
+            get { return m_force; }
+            set
+            {
+                if (value.IsFinite())
+                {
+                    AddChange(changes.Force, value);
+                }
+                else
+                {
+                    m_log.WarnFormat("[PHYSICS]: NaN in Force Applied to an Object {0}", Name);
+                }
+            }
+        }
+
+        public override void SetVolumeDetect(int param)
+        {
+            m_fakeisVolumeDetect = (param != 0);
+            AddChange(changes.VolumeDtc, m_fakeisVolumeDetect);
+        }
+
+        public override Vector3 GeometricCenter
+        {
+            // this is not real geometric center but a average of positions relative to root prim acording to
+            // http://wiki.secondlife.com/wiki/llGetGeometricCenter
+            // ignoring tortured prims details since sl also seems to ignore
+            // so no real use in doing it on physics
+            get
+            {
+                return Vector3.Zero;
+            }
+        }
+
+        public override PhysicsInertiaData GetInertiaData()
+        {
+            PhysicsInertiaData inertia;
+            if(childPrim)
+            {
+                if(_parent != null)
+                    return _parent.GetInertiaData();
+                else
+                {
+                    inertia = new PhysicsInertiaData();
+                    inertia.TotalMass = -1;
+                    return inertia;
+                }
+            }
+
+            inertia = new PhysicsInertiaData();
+
+            // double buffering
+            if(m_fakeInertiaOverride != null)
+            { 
+                d.Mass objdmass = new d.Mass();
+                objdmass.I.M00 = m_fakeInertiaOverride.Inertia.X;
+                objdmass.I.M11 = m_fakeInertiaOverride.Inertia.Y;
+                objdmass.I.M22 = m_fakeInertiaOverride.Inertia.Z;
+
+                objdmass.mass = m_fakeInertiaOverride.TotalMass;
+                    
+                if(Math.Abs(m_fakeInertiaOverride.InertiaRotation.W) < 0.999)
+                {
+                    d.Matrix3 inertiarotmat = new d.Matrix3();
+                    d.Quaternion inertiarot = new d.Quaternion();
+
+                    inertiarot.X = m_fakeInertiaOverride.InertiaRotation.X;
+                    inertiarot.Y = m_fakeInertiaOverride.InertiaRotation.Y;
+                    inertiarot.Z = m_fakeInertiaOverride.InertiaRotation.Z;
+                    inertiarot.W = m_fakeInertiaOverride.InertiaRotation.W;
+                    d.RfromQ(out inertiarotmat, ref inertiarot);
+                    d.MassRotate(ref objdmass, ref inertiarotmat);
+                }
+
+                inertia.TotalMass = m_fakeInertiaOverride.TotalMass;
+                inertia.CenterOfMass = m_fakeInertiaOverride.CenterOfMass;
+                inertia.Inertia.X = objdmass.I.M00;
+                inertia.Inertia.Y = objdmass.I.M11;
+                inertia.Inertia.Z = objdmass.I.M22;
+                inertia.InertiaRotation.X =  objdmass.I.M01;
+                inertia.InertiaRotation.Y =  objdmass.I.M02;
+                inertia.InertiaRotation.Z =  objdmass.I.M12;
+                return inertia;
+            }
+
+            inertia.TotalMass = m_mass;
+
+            if(Body == IntPtr.Zero || prim_geom == IntPtr.Zero)
+            {
+                inertia.CenterOfMass = Vector3.Zero;
+                inertia.Inertia = Vector3.Zero;
+                inertia.InertiaRotation =  Vector4.Zero;
+                return inertia;
+            }
+
+            d.Vector3 dtmp;
+            d.Mass m = new d.Mass();
+            lock(_parent_scene.OdeLock)
+            {
+                d.AllocateODEDataForThread(0);
+                dtmp = d.GeomGetOffsetPosition(prim_geom);
+                d.BodyGetMass(Body, out m);
+            }
+
+            Vector3 cm = new Vector3(-dtmp.X, -dtmp.Y, -dtmp.Z);
+            inertia.CenterOfMass = cm;
+            inertia.Inertia = new Vector3(m.I.M00, m.I.M11, m.I.M22);
+            inertia.InertiaRotation = new Vector4(m.I.M01, m.I.M02 , m.I.M12, 0);
+
+            return inertia;
+        }
+
+        public override void SetInertiaData(PhysicsInertiaData inertia)
+        {
+            if(childPrim)
+            {
+                if(_parent != null)
+                    _parent.SetInertiaData(inertia);
+                return;
+            }
+
+            if(inertia.TotalMass > 0)
+                m_fakeInertiaOverride = new PhysicsInertiaData(inertia);
+            else
+                m_fakeInertiaOverride = null;
+
+            if (inertia.TotalMass > _parent_scene.maximumMassObject)
+                inertia.TotalMass = _parent_scene.maximumMassObject;
+            AddChange(changes.SetInertia,(object)m_fakeInertiaOverride);
+        }
+
+        public override Vector3 CenterOfMass
+        {
+            get
+            {
+                lock (_parent_scene.OdeLock)
+                {
+                    d.AllocateODEDataForThread(0);
+
+                    d.Vector3 dtmp;
+                    if (!childPrim && Body != IntPtr.Zero)
+                    {
+                        dtmp = d.BodyGetPosition(Body);
+                        return new Vector3(dtmp.X, dtmp.Y, dtmp.Z);
+                    }
+                    else if (prim_geom != IntPtr.Zero)
+                    {
+                        d.Quaternion dq;
+                        d.GeomCopyQuaternion(prim_geom, out dq);
+                        Quaternion q;
+                        q.X = dq.X;
+                        q.Y = dq.Y;
+                        q.Z = dq.Z;
+                        q.W = dq.W;
+
+                        Vector3 Ptot = m_OBBOffset * q;
+                        dtmp = d.GeomGetPosition(prim_geom);
+                        Ptot.X += dtmp.X;
+                        Ptot.Y += dtmp.Y;
+                        Ptot.Z += dtmp.Z;
+
+                        //                    if(childPrim)  we only know about physical linksets
+                        return Ptot;
+/*
+                        float tmass = _mass;
+                        Ptot *= tmass;
+
+                        float m;
+
+                        foreach (OdePrim prm in childrenPrim)
+                        {
+                            m = prm._mass;
+                            Ptot += prm.CenterOfMass * m;
+                            tmass += m;
+                        }
+
+                        if (tmass == 0)
+                            tmass = 0;
+                        else
+                            tmass = 1.0f / tmass;
+
+                        Ptot *= tmass;
+                        return Ptot;
+*/
+                    }
+                    else
+                        return _position;
+                }
+            }
+        }
+
+        public override PrimitiveBaseShape Shape
+        {
+            set
+            {
+//                AddChange(changes.Shape, value);
+                _parent_scene.m_meshWorker.ChangeActorPhysRep(this, value, _size, m_fakeShapetype);
+            }
+        }
+
+        public override byte PhysicsShapeType
+        {
+            get
+            {
+                return m_fakeShapetype;
+            }
+            set
+            {
+                m_fakeShapetype = value;
+               _parent_scene.m_meshWorker.ChangeActorPhysRep(this, _pbs, _size, value);
+            }
+        }
+
+        public override Vector3 rootVelocity
+        {
+            get
+            {
+                if(_parent != null)
+                    return ((OdePrim)_parent).Velocity;
+                return Velocity;
+            }
+        }
+
+        public override Vector3 Velocity
+        {
+            get
+            {
+                if (_zeroFlag)
+                    return Vector3.Zero;
+                return _velocity;
+            }
+            set
+            {
+                if (value.IsFinite())
+                {
+                    if(m_outbounds)
+                        _velocity = value;
+                    else
+                        AddChange(changes.Velocity, value);
+                }
+                else
+                {
+                    m_log.WarnFormat("[PHYSICS]: Got NaN Velocity in Object {0}", Name);
+                }
+            }
+        }
+
+        public override Vector3 Torque
+        {
+            get
+            {
+                if (!IsPhysical || Body == IntPtr.Zero)
+                    return Vector3.Zero;
+
+                return m_torque;
+            }
+
+            set
+            {
+                if (value.IsFinite())
+                {
+                    AddChange(changes.Torque, value);
+                }
+                else
+                {
+                    m_log.WarnFormat("[PHYSICS]: Got NaN Torque in Object {0}", Name);
+                }
+            }
+        }
+
+        public override float CollisionScore
+        {
+            get { return m_collisionscore; }
+            set { m_collisionscore = value; }
+        }
+
+        public override bool Kinematic
+        {
+            get { return false; }
+            set { }
+        }
+
+        public override Quaternion Orientation
+        {
+            get
+            {
+                if (givefakeori > 0)
+                    return fakeori;
+                else
+
+                    return _orientation;
+            }
+            set
+            {
+                if (QuaternionIsFinite(value))
+                {
+                    fakeori = value;
+                    givefakeori++;
+
+                    value.Normalize();
+
+                    AddChange(changes.Orientation, value);
+                }
+                else
+                    m_log.WarnFormat("[PHYSICS]: Got NaN quaternion Orientation from Scene in Object {0}", Name);
+
+            }
+        }
+
+        public override Vector3 Acceleration
+        {
+            get { return m_acceleration; }
+            set
+            {
+                if(m_outbounds)
+                    m_acceleration = value;
+            }
+        }
+
+        public override Vector3 RotationalVelocity
+        {
+            get
+            {
+                Vector3 pv = Vector3.Zero;
+                if (_zeroFlag)
+                    return pv;
+
+                if (m_rotationalVelocity.ApproxEquals(pv, 0.0001f))
+                    return pv;
+
+                return m_rotationalVelocity;
+            }
+            set
+            {
+                if (value.IsFinite())
+                {
+                    if(m_outbounds)
+                        m_rotationalVelocity = value;
+                    else
+                        AddChange(changes.AngVelocity, value);
+                }
+                else
+                {
+                    m_log.WarnFormat("[PHYSICS]: Got NaN RotationalVelocity in Object {0}", Name);
+                }
+            }
+        }
+
+        public override float Buoyancy
+        {
+            get { return m_buoyancy; }
+            set
+            {
+                 AddChange(changes.Buoyancy,value);
+            }
+        }
+
+        public override bool FloatOnWater
+        {
+            set
+            {
+                AddChange(changes.CollidesWater, value);
+            }
+        }
+
+        public override Vector3 PIDTarget
+        {
+            set
+            {
+                if (value.IsFinite())
+                {
+                    AddChange(changes.PIDTarget,value);
+                }
+                else
+                    m_log.WarnFormat("[PHYSICS]: Got NaN PIDTarget from Scene on Object {0}", Name);
+            }
+        }
+
+        public override bool PIDActive
+        {
+            get
+            {
+                return m_usePID;
+            }
+            set
+            {
+                AddChange(changes.PIDActive,value);
+            }
+        }
+
+        public override float PIDTau
+        {
+            set
+            {
+                float tmp = 0;
+                if (value > 0)
+                {
+                    float mint = (0.05f > m_timeStep ? 0.05f : m_timeStep);
+                    if (value < mint)
+                        tmp = mint;
+                    else
+                        tmp = value;
+                }
+                AddChange(changes.PIDTau,tmp);
+            }
+        }
+
+        public override float PIDHoverHeight
+        {
+            set
+            {
+                AddChange(changes.PIDHoverHeight,value);
+            }
+        }
+        public override bool PIDHoverActive
+        {
+            get
+            {
+                return m_useHoverPID;
+            }
+            set
+            {
+                AddChange(changes.PIDHoverActive, value);
+            }
+        }
+
+        public override PIDHoverType PIDHoverType
+        {
+            set
+            {
+                AddChange(changes.PIDHoverType,value);
+            }
+        }
+
+        public override float PIDHoverTau
+        {
+            set
+            {
+                float tmp =0;
+                if (value > 0)
+                {
+                    float mint = (0.05f > m_timeStep ? 0.05f : m_timeStep);
+                    if (value < mint)
+                        tmp = mint;
+                    else
+                        tmp = value;
+                }
+                AddChange(changes.PIDHoverTau, tmp);
+            }
+        }
+
+        public override Quaternion APIDTarget { set { return; } }
+
+        public override bool APIDActive { set { return; } }
+
+        public override float APIDStrength { set { return; } }
+
+        public override float APIDDamping { set { return; } }
+
+        public override int VehicleType
+        {
+            // we may need to put a fake on this
+            get
+            {
+                if (m_vehicle == null)
+                    return (int)Vehicle.TYPE_NONE;
+                else
+                    return (int)m_vehicle.Type;
+            }
+            set
+            {
+                AddChange(changes.VehicleType, value);
+            }
+        }
+
+        public override void VehicleFloatParam(int param, float value)
+        {
+            strVehicleFloatParam fp = new strVehicleFloatParam();
+            fp.param = param;
+            fp.value = value;
+            AddChange(changes.VehicleFloatParam, fp);
+        }
+
+        public override void VehicleVectorParam(int param, Vector3 value)
+        {
+            strVehicleVectorParam fp = new strVehicleVectorParam();
+            fp.param = param;
+            fp.value = value;
+            AddChange(changes.VehicleVectorParam, fp);
+        }
+
+        public override void VehicleRotationParam(int param, Quaternion value)
+        {
+            strVehicleQuatParam fp = new strVehicleQuatParam();
+            fp.param = param;
+            fp.value = value;
+            AddChange(changes.VehicleRotationParam, fp);
+        }
+
+        public override void VehicleFlags(int param, bool value)
+        {
+            strVehicleBoolParam bp = new strVehicleBoolParam();
+            bp.param = param;
+            bp.value = value;
+            AddChange(changes.VehicleFlags, bp);
+        }
+
+        public override void SetVehicle(object vdata)
+        {
+            AddChange(changes.SetVehicle, vdata);
+        }
+        public void SetAcceleration(Vector3 accel)
+        {
+            m_acceleration = accel;
+        }
+
+        public override void AddForce(Vector3 force, bool pushforce)
+        {
+            if (force.IsFinite())
+            {
+                if(pushforce)
+                    AddChange(changes.AddForce, force);
+                else // a impulse
+                    AddChange(changes.AddForce, force * m_invTimeStep);
+            }
+            else
+            {
+                m_log.WarnFormat("[PHYSICS]: Got Invalid linear force vector from Scene in Object {0}", Name);
+            }
+            //m_log.Info("[PHYSICS]: Added Force:" + force.ToString() +  " to prim at " + Position.ToString());
+        }
+
+        public override void AddAngularForce(Vector3 force, bool pushforce)
+        {
+            if (force.IsFinite())
+            {
+//                if(pushforce)  for now applyrotationimpulse seems more happy applied as a force
+                    AddChange(changes.AddAngForce, force);
+//                else // a impulse
+//                    AddChange(changes.AddAngForce, force * m_invTimeStep);
+            }
+            else
+            {
+                m_log.WarnFormat("[PHYSICS]: Got Invalid Angular force vector from Scene in Object {0}", Name);
+            }
+        }
+
+        public override void CrossingFailure()
+        {
+            lock(_parent_scene.OdeLock)
+            {
+                if (m_outbounds)
+                {
+                    _position.X = Util.Clip(_position.X, 0.5f, _parent_scene.WorldExtents.X - 0.5f);
+                    _position.Y = Util.Clip(_position.Y, 0.5f, _parent_scene.WorldExtents.Y - 0.5f);
+                    _position.Z = Util.Clip(_position.Z + 0.2f, -100f, 50000f);
+
+                    m_lastposition = _position;
+                    _velocity.X = 0;
+                    _velocity.Y = 0;
+                    _velocity.Z = 0;
+
+                    d.AllocateODEDataForThread(0);
+
+                    m_lastVelocity = _velocity;
+                    if (m_vehicle != null && m_vehicle.Type != Vehicle.TYPE_NONE)
+                        m_vehicle.Stop();
+
+                    if(Body != IntPtr.Zero)
+                        d.BodySetLinearVel(Body, 0, 0, 0); // stop it
+                    if (prim_geom != IntPtr.Zero)
+                        d.GeomSetPosition(prim_geom, _position.X, _position.Y, _position.Z);
+
+                    m_outbounds = false;
+                    changeDisable(false);
+                    base.RequestPhysicsterseUpdate();
+                }
+            }
+        }
+
+        public override void CrossingStart()
+        {
+            lock(_parent_scene.OdeLock)
+            {
+                if (m_outbounds || childPrim)
+                    return;
+
+                m_outbounds = true;
+
+                m_lastposition = _position;
+                m_lastorientation = _orientation;
+
+                d.AllocateODEDataForThread(0);
+                if(Body != IntPtr.Zero)
+                {
+                    d.Vector3 dtmp = d.BodyGetAngularVel(Body);
+                    m_rotationalVelocity.X = dtmp.X;
+                    m_rotationalVelocity.Y = dtmp.Y;
+                    m_rotationalVelocity.Z = dtmp.Z;
+
+                    dtmp = d.BodyGetLinearVel(Body);
+                    _velocity.X = dtmp.X;
+                    _velocity.Y = dtmp.Y;
+                    _velocity.Z = dtmp.Z;
+
+                    d.BodySetLinearVel(Body, 0, 0, 0); // stop it
+                    d.BodySetAngularVel(Body, 0, 0, 0);
+                }
+                if(prim_geom != IntPtr.Zero)
+                    d.GeomSetPosition(prim_geom, _position.X, _position.Y, _position.Z);
+                disableBodySoft(); // stop collisions
+                UnSubscribeEvents();
+            }
+        }
+
+        public override void SetMomentum(Vector3 momentum)
+        {
+        }
+
+        public override void SetMaterial(int pMaterial)
+        {
+            m_material = pMaterial;
+            mu = _parent_scene.m_materialContactsData[pMaterial].mu;
+            bounce = _parent_scene.m_materialContactsData[pMaterial].bounce;
+        }
+
+        public override float Density
+        {
+            get
+            {
+                return m_density * 100f;
+            }
+            set
+            {
+                float old = m_density;
+                m_density = value / 100f;
+ //               if(m_density != old)
+ //                   UpdatePrimBodyData();
+            }
+        }
+        public override float GravModifier
+        {
+            get
+            {
+                return m_gravmod;
+            }
+            set
+            {
+                m_gravmod = value;
+                if (m_vehicle != null)
+                    m_vehicle.GravMod = m_gravmod;
+            }
+        }
+        public override float Friction
+        {
+            get
+            {
+                return mu;
+            }
+            set
+            {
+                mu = value;
+            }
+        }
+
+        public override float Restitution
+        {
+            get
+            {
+                return bounce;
+            }
+            set
+            {
+                bounce = value;
+            }
+        }
+
+        public void setPrimForRemoval()
+        {
+            AddChange(changes.Remove, null);
+        }
+
+        public override void link(PhysicsActor obj)
+        {
+            AddChange(changes.Link, obj);
+        }
+
+        public override void delink()
+        {
+            AddChange(changes.DeLink, null);
+        }
+
+        public override void LockAngularMotion(byte axislock)
+        {
+//                m_log.DebugFormat("[axislock]: <{0},{1},{2}>", axis.X, axis.Y, axis.Z);
+            AddChange(changes.AngLock, axislock);
+
+        }
+
+        public override void SubscribeEvents(int ms)
+        {
+            m_eventsubscription = ms;
+            m_cureventsubscription = 0;
+            if (CollisionEventsThisFrame == null)
+                CollisionEventsThisFrame = new CollisionEventUpdate();
+            if (CollisionVDTCEventsThisFrame == null)
+                CollisionVDTCEventsThisFrame = new CollisionEventUpdate();
+            SentEmptyCollisionsEvent = false;
+        }
+
+        public override void UnSubscribeEvents()
+        {
+            if (CollisionVDTCEventsThisFrame != null)
+            {
+                CollisionVDTCEventsThisFrame.Clear();
+                CollisionVDTCEventsThisFrame = null;
+            }
+            if (CollisionEventsThisFrame != null)
+            {
+                CollisionEventsThisFrame.Clear();
+                CollisionEventsThisFrame = null;
+            }
+            m_eventsubscription = 0;
+           _parent_scene.RemoveCollisionEventReporting(this);
+        }
+
+        public override void AddCollisionEvent(uint CollidedWith, ContactPoint contact)
+        {
+            if (CollisionEventsThisFrame == null)
+                CollisionEventsThisFrame = new CollisionEventUpdate();
+
+            CollisionEventsThisFrame.AddCollider(CollidedWith, contact);
+            _parent_scene.AddCollisionEventReporting(this);
+        }
+
+        public override void AddVDTCCollisionEvent(uint CollidedWith, ContactPoint contact)
+        {
+            if (CollisionVDTCEventsThisFrame == null)
+                CollisionVDTCEventsThisFrame = new CollisionEventUpdate();
+
+            CollisionVDTCEventsThisFrame.AddCollider(CollidedWith, contact);
+            _parent_scene.AddCollisionEventReporting(this);
+        }
+
+        internal void SleeperAddCollisionEvents()
+        {
+            if(CollisionEventsThisFrame != null && CollisionEventsThisFrame.m_objCollisionList.Count != 0)
+            {
+                foreach(KeyValuePair<uint,ContactPoint> kvp in CollisionEventsThisFrame.m_objCollisionList)
+                {
+                    if(kvp.Key == 0)
+                        continue;
+                    OdePrim other = _parent_scene.getPrim(kvp.Key);
+                    if(other == null)
+                        continue;
+                    ContactPoint cp = kvp.Value;
+                    cp.SurfaceNormal = - cp.SurfaceNormal;
+                    cp.RelativeSpeed = -cp.RelativeSpeed;
+                    other.AddCollisionEvent(ParentActor.LocalID,cp);
+                }
+            }
+            if(CollisionVDTCEventsThisFrame != null && CollisionVDTCEventsThisFrame.m_objCollisionList.Count != 0)
+            {
+                foreach(KeyValuePair<uint,ContactPoint> kvp in CollisionVDTCEventsThisFrame.m_objCollisionList)
+                {
+                    OdePrim other = _parent_scene.getPrim(kvp.Key);
+                    if(other == null)
+                        continue;
+                    ContactPoint cp = kvp.Value;
+                    cp.SurfaceNormal = - cp.SurfaceNormal;
+                    cp.RelativeSpeed = -cp.RelativeSpeed;
+                    other.AddCollisionEvent(ParentActor.LocalID,cp);
+                }
+            }
+        }
+
+        internal void clearSleeperCollisions()
+        {
+            if(CollisionVDTCEventsThisFrame != null && CollisionVDTCEventsThisFrame.Count >0 )
+                CollisionVDTCEventsThisFrame.Clear();
+        }
+
+        public void SendCollisions(int timestep)
+        {
+            if (m_cureventsubscription < 50000)
+                m_cureventsubscription += timestep;
+
+
+            if (m_cureventsubscription < m_eventsubscription)
+                return;
+
+            if (CollisionEventsThisFrame == null)
+                return;
+
+            int ncolisions = CollisionEventsThisFrame.m_objCollisionList.Count;
+
+            if (!SentEmptyCollisionsEvent || ncolisions > 0)
+            {
+                base.SendCollisionUpdate(CollisionEventsThisFrame);
+                m_cureventsubscription = 0;
+
+                if (ncolisions == 0)
+                {
+                    SentEmptyCollisionsEvent = true;
+//                    _parent_scene.RemoveCollisionEventReporting(this);
+                }
+                else if(Body == IntPtr.Zero || (d.BodyIsEnabled(Body) && m_bodydisablecontrol >= 0 ))
+                {
+                    SentEmptyCollisionsEvent = false;
+                    CollisionEventsThisFrame.Clear();
+                }
+            }
+        }
+
+        public override bool SubscribedEvents()
+        {
+            if (m_eventsubscription > 0)
+                return true;
+            return false;
+        }
+
+        public OdePrim(String primName, ODEScene parent_scene, Vector3 pos, Vector3 size,
+                       Quaternion rotation, PrimitiveBaseShape pbs, bool pisPhysical,bool pisPhantom,byte _shapeType,uint plocalID)
+        {
+            _parent_scene = parent_scene;
+
+            Name = primName;
+            m_localID = plocalID;
+
+            m_vehicle = null;
+
+            if (!pos.IsFinite())
+            {
+                pos = new Vector3(((float)Constants.RegionSize * 0.5f), ((float)Constants.RegionSize * 0.5f),
+                    parent_scene.GetTerrainHeightAtXY(((float)Constants.RegionSize * 0.5f), ((float)Constants.RegionSize * 0.5f)) + 0.5f);
+                m_log.WarnFormat("[PHYSICS]: Got nonFinite Object create Position for {0}", Name);
+            }
+            _position = pos;
+            givefakepos = 0;
+
+            m_timeStep = parent_scene.ODE_STEPSIZE;
+            m_invTimeStep = 1f / m_timeStep;
+
+            m_density = parent_scene.geomDefaultDensity;
+            m_body_autodisable_frames = parent_scene.bodyFramesAutoDisable;
+
+            prim_geom = IntPtr.Zero;
+            collide_geom = IntPtr.Zero;
+            Body = IntPtr.Zero;
+
+            if (!size.IsFinite())
+            {
+                size = new Vector3(0.5f, 0.5f, 0.5f);
+                m_log.WarnFormat("[PHYSICS]: Got nonFinite Object create Size for {0}", Name);
+            }
+
+            if (size.X <= 0) size.X = 0.01f;
+            if (size.Y <= 0) size.Y = 0.01f;
+            if (size.Z <= 0) size.Z = 0.01f;
+
+            _size = size;
+
+            if (!QuaternionIsFinite(rotation))
+            {
+                rotation = Quaternion.Identity;
+                m_log.WarnFormat("[PHYSICS]: Got nonFinite Object create Rotation for {0}", Name);
+            }
+
+            _orientation = rotation;
+            givefakeori = 0;
+
+            _pbs = pbs;
+
+            m_targetSpace = IntPtr.Zero;
+
+            if (pos.Z < 0)
+            {
+                m_isphysical = false;
+            }
+            else
+            {
+                m_isphysical = pisPhysical;
+            }
+            m_fakeisphysical = m_isphysical;
+
+            m_isVolumeDetect = false;
+            m_fakeisVolumeDetect = false;
+
+            m_force = Vector3.Zero;
+
+            m_iscolliding = false;
+            m_colliderfilter = 0;
+            m_NoColide = false;
+
+            _triMeshData = IntPtr.Zero;
+
+            m_fakeShapetype = _shapeType;
+
+            m_lastdoneSelected = false;
+            m_isSelected = false;
+            m_delaySelect = false;
+
+            m_isphantom = pisPhantom;
+            m_fakeisphantom = pisPhantom;
+
+            mu = parent_scene.m_materialContactsData[(int)Material.Wood].mu;
+            bounce = parent_scene.m_materialContactsData[(int)Material.Wood].bounce;
+
+            m_building = true; // control must set this to false when done
+
+            AddChange(changes.Add, null);
+
+            // get basic mass parameters
+            ODEPhysRepData repData = _parent_scene.m_meshWorker.NewActorPhysRep(this, _pbs, _size, _shapeType);
+
+            primVolume = repData.volume;
+            m_OBB = repData.OBB;
+            m_OBBOffset = repData.OBBOffset;
+
+            UpdatePrimBodyData();
+        }
+
+        private void resetCollisionAccounting()
+        {
+            m_collisionscore = 0;
+        }
+
+        private void UpdateCollisionCatFlags()
+        {
+            if(m_isphysical && m_disabled)
+            {
+                m_collisionCategories = 0;
+                m_collisionFlags = 0;
+            }
+
+            else if (m_isSelected)
+            {
+                m_collisionCategories = CollisionCategories.Selected;
+                m_collisionFlags = 0;
+            }
+
+            else if (m_isVolumeDetect)
+            {
+                m_collisionCategories = CollisionCategories.VolumeDtc;
+                if (m_isphysical)
+                    m_collisionFlags = CollisionCategories.Geom | CollisionCategories.Character;
+                else
+                    m_collisionFlags = 0;
+            }
+            else if (m_isphantom)
+            {
+                m_collisionCategories = CollisionCategories.Phantom;
+                if (m_isphysical)
+                    m_collisionFlags = CollisionCategories.Land;
+                else
+                    m_collisionFlags = 0;
+            }
+            else
+            {
+                m_collisionCategories = CollisionCategories.Geom;
+                if (m_isphysical)
+                    m_collisionFlags = m_default_collisionFlagsPhysical;
+                else
+                    m_collisionFlags = m_default_collisionFlagsNotPhysical;
+            }
+        }
+
+        private void ApplyCollisionCatFlags()
+        {
+            if (prim_geom != IntPtr.Zero)
+            {
+                if (!childPrim && childrenPrim.Count > 0)
+                {
+                    foreach (OdePrim prm in childrenPrim)
+                    {
+                        if (m_isphysical && m_disabled)
+                        {
+                            prm.m_collisionCategories = 0;
+                            prm.m_collisionFlags = 0;
+                        }
+                        else
+                        {
+                            // preserve some
+                            if (prm.m_isSelected)
+                            {
+                                prm.m_collisionCategories = CollisionCategories.Selected;
+                                prm.m_collisionFlags = 0;
+                            }
+                            else if (prm.m_isVolumeDetect)
+                            {
+                                prm.m_collisionCategories = CollisionCategories.VolumeDtc;
+                                if (m_isphysical)
+                                    prm.m_collisionFlags = CollisionCategories.Geom | CollisionCategories.Character;
+                                else
+                                    prm.m_collisionFlags = 0;
+                            }
+                            else if (prm.m_isphantom)
+                            {
+                                prm.m_collisionCategories = CollisionCategories.Phantom;
+                                if (m_isphysical)
+                                    prm.m_collisionFlags = CollisionCategories.Land;
+                                else
+                                    prm.m_collisionFlags = 0;
+                            }
+                            else
+                            {
+                                prm.m_collisionCategories = m_collisionCategories;
+                                prm.m_collisionFlags = m_collisionFlags;
+                            }
+                        }
+
+                        if (prm.prim_geom != IntPtr.Zero)
+                        {
+                            if (prm.m_NoColide)
+                            {
+                                d.GeomSetCategoryBits(prm.prim_geom, 0);
+                                if (m_isphysical)
+                                    d.GeomSetCollideBits(prm.prim_geom, (int)CollisionCategories.Land);
+                                else
+                                    d.GeomSetCollideBits(prm.prim_geom, 0);
+                            }
+                            else
+                            {
+                                d.GeomSetCategoryBits(prm.prim_geom, (uint)prm.m_collisionCategories);
+                                d.GeomSetCollideBits(prm.prim_geom, (uint)prm.m_collisionFlags);
+                            }
+                        }
+                    }
+                }
+
+                if (m_NoColide)
+                {
+                    d.GeomSetCategoryBits(prim_geom, 0);
+                    d.GeomSetCollideBits(prim_geom, (uint)CollisionCategories.Land);
+                    if (collide_geom != prim_geom && collide_geom != IntPtr.Zero)
+                    {
+                        d.GeomSetCategoryBits(collide_geom, 0);
+                        d.GeomSetCollideBits(collide_geom, (uint)CollisionCategories.Land);
+                    }
+                }
+                else
+                {
+                    d.GeomSetCategoryBits(prim_geom, (uint)m_collisionCategories);
+                    d.GeomSetCollideBits(prim_geom, (uint)m_collisionFlags);
+                    if (collide_geom != prim_geom && collide_geom != IntPtr.Zero)
+                    {
+                        d.GeomSetCategoryBits(collide_geom, (uint)m_collisionCategories);
+                        d.GeomSetCollideBits(collide_geom, (uint)m_collisionFlags);
+                    }
+                }
+            }
+        }
+
+        private void createAMotor(byte axislock)
+        {
+            if (Body == IntPtr.Zero)
+                return;
+
+            if (Amotor != IntPtr.Zero)
+            {
+                d.JointDestroy(Amotor);
+                Amotor = IntPtr.Zero;
+            }
+
+            int axisnum = 0;
+            bool axisX = false;
+            bool axisY = false;
+            bool axisZ = false;
+            if((axislock & 0x02) != 0)
+                {
+                axisnum++;
+                axisX = true;
+                }
+            if((axislock & 0x04) != 0)
+                {
+                axisnum++;
+                axisY = true;
+                }
+            if((axislock & 0x08) != 0)
+                {
+                axisnum++;
+                axisZ = true;
+                }
+
+            if(axisnum == 0)
+                return;
+            // stop it
+            d.BodySetTorque(Body, 0, 0, 0);
+            d.BodySetAngularVel(Body, 0, 0, 0);
+
+            Amotor = d.JointCreateAMotor(_parent_scene.world, IntPtr.Zero);
+            d.JointAttach(Amotor, Body, IntPtr.Zero);
+
+            d.JointSetAMotorMode(Amotor, 0);
+
+            d.JointSetAMotorNumAxes(Amotor, axisnum);
+
+            // get current orientation to lock
+
+            d.Quaternion dcur = d.BodyGetQuaternion(Body);
+            Quaternion curr; // crap convertion between identical things
+            curr.X = dcur.X;
+            curr.Y = dcur.Y;
+            curr.Z = dcur.Z;
+            curr.W = dcur.W;
+            Vector3 ax;
+
+            int i = 0;
+            int j = 0;
+            if (axisX)
+            {
+                ax = (new Vector3(1, 0, 0)) * curr; // rotate world X to current local X
+                d.JointSetAMotorAxis(Amotor, 0, 0, ax.X, ax.Y, ax.Z);
+                d.JointSetAMotorAngle(Amotor, 0, 0);
+                d.JointSetAMotorParam(Amotor, (int)d.JointParam.LoStop, 0f);
+                d.JointSetAMotorParam(Amotor, (int)d.JointParam.HiStop, 0f);
+                d.JointSetAMotorParam(Amotor, (int)d.JointParam.Vel, 0);
+                d.JointSetAMotorParam(Amotor, (int)d.JointParam.FudgeFactor, 0.0001f);
+                d.JointSetAMotorParam(Amotor, (int)d.JointParam.Bounce, 0f);
+                d.JointSetAMotorParam(Amotor, (int)d.JointParam.CFM, 0f);
+                d.JointSetAMotorParam(Amotor, (int)d.JointParam.FMax, 5e8f);
+                d.JointSetAMotorParam(Amotor, (int)d.JointParam.StopCFM, 0f);
+                d.JointSetAMotorParam(Amotor, (int)d.JointParam.StopERP, 0.8f);
+                i++;
+                j = 256; // move to next axis set
+            }
+
+            if (axisY)
+            {
+                ax = (new Vector3(0, 1, 0)) * curr;
+                d.JointSetAMotorAxis(Amotor, i, 0, ax.X, ax.Y, ax.Z);
+                d.JointSetAMotorAngle(Amotor, i, 0);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.LoStop, 0f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.HiStop, 0f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.Vel, 0);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.FudgeFactor, 0.0001f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.Bounce, 0f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.CFM, 0f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.FMax, 5e8f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.StopCFM, 0f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.StopERP, 0.8f);
+                i++;
+                j += 256;
+            }
+
+            if (axisZ)
+            {
+                ax = (new Vector3(0, 0, 1)) * curr;
+                d.JointSetAMotorAxis(Amotor, i, 0, ax.X, ax.Y, ax.Z);
+                d.JointSetAMotorAngle(Amotor, i, 0);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.LoStop, 0f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.HiStop, 0f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.Vel, 0);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.FudgeFactor, 0.0001f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.Bounce, 0f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.CFM, 0f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.FMax, 5e8f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.StopCFM, 0f);
+                d.JointSetAMotorParam(Amotor, j + (int)d.JointParam.StopERP, 0.8f);
+            }
+        }
+
+
+        private void SetGeom(IntPtr geom)
+        {
+            prim_geom = geom;
+            //Console.WriteLine("SetGeom to " + prim_geom + " for " + Name);
+            if (prim_geom != IntPtr.Zero)
+            {
+
+                if (m_NoColide)
+                {
+                    d.GeomSetCategoryBits(prim_geom, 0);
+                    if (m_isphysical)
+                    {
+                        d.GeomSetCollideBits(prim_geom, (uint)CollisionCategories.Land);
+                    }
+                    else
+                    {
+                        d.GeomSetCollideBits(prim_geom, 0);
+                        d.GeomDisable(prim_geom);
+                    }
+                }
+                else
+                {
+                    d.GeomSetCategoryBits(prim_geom, (uint)m_collisionCategories);
+                    d.GeomSetCollideBits(prim_geom, (uint)m_collisionFlags);
+                }
+
+                UpdatePrimBodyData();
+                _parent_scene.actor_name_map[prim_geom] = this;
+
+/*
+// debug
+                d.AABB aabb;
+                d.GeomGetAABB(prim_geom, 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)
+                    m_log.WarnFormat("[PHYSICS]: large prim geo {0},size {1}, AABBsize <{2},{3},{4}, mesh {5} at {6}",
+                        Name, _size.ToString(), x, y, z, _pbs.SculptEntry ? _pbs.SculptTexture.ToString() : "primMesh", _position.ToString());
+                else if (x < 0.001f || y < 0.001f || z < 0.001f)
+                    m_log.WarnFormat("[PHYSICS]: small prim geo {0},size {1}, AABBsize <{2},{3},{4}, mesh {5} at {6}",
+                        Name, _size.ToString(), x, y, z, _pbs.SculptEntry ? _pbs.SculptTexture.ToString() : "primMesh", _position.ToString());
+*/
+
+            }
+            else
+                m_log.Warn("Setting bad Geom");
+        }
+
+        private bool GetMeshGeom()
+        {
+            IntPtr vertices, indices;
+            int vertexCount, indexCount;
+            int vertexStride, triStride;
+
+            IMesh mesh = m_mesh;
+
+            if (mesh == null)
+                return false;
+
+            mesh.getVertexListAsPtrToFloatArray(out vertices, out vertexStride, out vertexCount);
+            mesh.getIndexListAsPtrToIntArray(out indices, out triStride, out indexCount);
+
+            if (vertexCount == 0 || indexCount == 0)
+            {
+                m_log.WarnFormat("[PHYSICS]: Invalid mesh data on OdePrim {0}, mesh {1} at {2}",
+                    Name, _pbs.SculptEntry ? _pbs.SculptTexture.ToString() : "primMesh",_position.ToString());
+
+                m_hasOBB = false;
+                m_OBBOffset = Vector3.Zero;
+                m_OBB = _size * 0.5f;
+
+                m_physCost = 0.1f;
+                m_streamCost = 1.0f;
+
+                _parent_scene.mesher.ReleaseMesh(mesh);
+                m_meshState = MeshState.MeshFailed;
+                m_mesh = null;
+                return false;
+            }
+
+            if (vertexCount > 64000 || indexCount > 64000)
+            {
+                m_log.WarnFormat("[PHYSICS]: large mesh data on OdePrim {0}, mesh {1} at {2}, {3} vertices, {4} indexes",
+                    Name, _pbs.SculptEntry ? _pbs.SculptTexture.ToString() : "primMesh",
+                    _position.ToString() ,vertexCount , indexCount );
+            }
+            IntPtr geo = IntPtr.Zero;
+
+            try
+            {
+                _triMeshData = d.GeomTriMeshDataCreate();
+
+                d.GeomTriMeshDataBuildSimple(_triMeshData, vertices, vertexStride, vertexCount, indices, indexCount, triStride);
+                d.GeomTriMeshDataPreprocess(_triMeshData);
+
+                geo = d.CreateTriMesh(m_targetSpace, _triMeshData, null, null, null);
+            }
+
+            catch (Exception e)
+            {
+                m_log.ErrorFormat("[PHYSICS]: SetGeom Mesh failed for {0} exception: {1}", Name, e);
+                if (_triMeshData != IntPtr.Zero)
+                {
+                    try
+                    {
+                        d.GeomTriMeshDataDestroy(_triMeshData);
+                    }
+                    catch
+                    {
+                    }
+                }
+                _triMeshData = IntPtr.Zero;
+
+                m_hasOBB = false;
+                m_OBBOffset = Vector3.Zero;
+                m_OBB = _size * 0.5f;
+                m_physCost = 0.1f;
+                m_streamCost = 1.0f;
+
+                _parent_scene.mesher.ReleaseMesh(mesh);
+                m_meshState = MeshState.MeshFailed;
+                m_mesh = null;
+                return false;
+            }
+
+            m_physCost = 0.0013f * (float)indexCount;
+            // todo
+            m_streamCost = 1.0f;
+
+            SetGeom(geo);
+
+            return true;
+        }
+
+        private void CreateGeom(bool OverrideToBox)
+        {
+            bool hasMesh = false;
+
+            m_NoColide = false;
+
+            if ((m_meshState & MeshState.MeshNoColide) != 0)
+                m_NoColide = true;
+
+            else if(!OverrideToBox && m_mesh != null)
+            {
+                if (GetMeshGeom())
+                    hasMesh = true;
+                else
+                    m_NoColide = true;
+            }
+
+
+            if (!hasMesh)
+            {
+                IntPtr geo = IntPtr.Zero;
+
+                if (_pbs.ProfileShape == ProfileShape.HalfCircle && _pbs.PathCurve == (byte)Extrusion.Curve1
+                    && _size.X == _size.Y && _size.Y == _size.Z)
+                { // it's a sphere
+                    try
+                    {
+                        geo = d.CreateSphere(m_targetSpace, _size.X * 0.5f);
+                    }
+                    catch (Exception e)
+                    {
+                        m_log.WarnFormat("[PHYSICS]: Create sphere failed: {0}", e);
+                        return;
+                    }
+                }
+                else
+                {// do it as a box
+                    try
+                    {
+                        geo = d.CreateBox(m_targetSpace, _size.X, _size.Y, _size.Z);
+                    }
+                    catch (Exception e)
+                    {
+                        m_log.Warn("[PHYSICS]: Create box failed: {0}", e);
+                        return;
+                    }
+                }
+                m_physCost = 0.1f;
+                m_streamCost = 1.0f;
+                SetGeom(geo);
+            }
+        }
+
+        private void RemoveGeom()
+        {
+            if (prim_geom != IntPtr.Zero)
+            {
+                _parent_scene.actor_name_map.Remove(prim_geom);
+
+                try
+                {
+                    d.GeomDestroy(prim_geom);
+                    if (_triMeshData != IntPtr.Zero)
+                    {
+                        d.GeomTriMeshDataDestroy(_triMeshData);
+                        _triMeshData = IntPtr.Zero;
+                    }
+                }
+                catch (Exception e)
+                {
+                    m_log.ErrorFormat("[PHYSICS]: PrimGeom destruction failed for {0} exception {1}", Name, e);
+                }
+
+                prim_geom = IntPtr.Zero;
+                collide_geom = IntPtr.Zero;
+                m_targetSpace = IntPtr.Zero;
+            }
+            else
+            {
+                m_log.ErrorFormat("[PHYSICS]: PrimGeom destruction BAD {0}", Name);
+            }
+
+            lock (m_meshlock)
+            {
+                if (m_mesh != null)
+                {
+                    _parent_scene.mesher.ReleaseMesh(m_mesh);
+                    m_mesh = null;
+                }
+            }
+
+            Body = IntPtr.Zero;
+            m_hasOBB = false;
+        }
+
+        //sets non physical prim m_targetSpace to right space in spaces grid for static prims
+        // should only be called for non physical prims unless they are becoming non physical
+        private void SetInStaticSpace(OdePrim prim)
+        {
+            IntPtr targetSpace = _parent_scene.MoveGeomToStaticSpace(prim.prim_geom, prim._position, prim.m_targetSpace);
+            prim.m_targetSpace = targetSpace;
+            collide_geom = IntPtr.Zero;
+        }
+
+        public void enableBodySoft()
+        {
+            m_disabled = false;
+            if (!childPrim && !m_isSelected)
+            {
+                if (m_isphysical && Body != IntPtr.Zero)
+                {
+                    UpdateCollisionCatFlags();
+                    ApplyCollisionCatFlags();
+
+                    _zeroFlag = true;
+                    d.BodySetAutoDisableSteps(Body, m_body_autodisable_frames);
+                    d.BodyEnable(Body);
+                }
+            }
+            resetCollisionAccounting();
+        }
+
+        private void disableBodySoft()
+        {
+            m_disabled = true;
+            if (!childPrim)
+            {
+                if (m_isphysical && Body != IntPtr.Zero)
+                {
+                    if (m_isSelected)
+                        m_collisionFlags = CollisionCategories.Selected;
+                    else
+                        m_collisionCategories = 0;
+                    m_collisionFlags = 0;
+                    ApplyCollisionCatFlags();
+                    d.BodyDisable(Body);
+                }
+            }
+        }
+
+        private void MakeBody()
+        {
+            if (!m_isphysical) // only physical get bodies
+                return;
+
+            if (childPrim)  // child prims don't get bodies;
+                return;
+
+            if (m_building)
+                return;
+
+            if (prim_geom == IntPtr.Zero)
+            {
+                m_log.Warn("[PHYSICS]: Unable to link the linkset.  Root has no geom yet");
+                return;
+            }
+
+            if (Body != IntPtr.Zero)
+            {
+                DestroyBody();
+                m_log.Warn("[PHYSICS]: MakeBody called having a body");
+            }
+
+            if (d.GeomGetBody(prim_geom) != IntPtr.Zero)
+            {
+                d.GeomSetBody(prim_geom, IntPtr.Zero);
+                m_log.Warn("[PHYSICS]: MakeBody root geom already had a body");
+            }
+
+            bool noInertiaOverride = (m_InertiaOverride == null);
+
+            Body = d.BodyCreate(_parent_scene.world);
+
+            d.Matrix3 mymat = new d.Matrix3();
+            d.Quaternion myrot = new d.Quaternion();
+            d.Mass objdmass = new d.Mass { };
+
+            myrot.X = _orientation.X;
+            myrot.Y = _orientation.Y;
+            myrot.Z = _orientation.Z;
+            myrot.W = _orientation.W;
+            d.RfromQ(out mymat, ref myrot);
+
+            // set the body rotation
+            d.BodySetRotation(Body, ref mymat);
+
+            if(noInertiaOverride)
+            {
+                objdmass = primdMass;
+                d.MassRotate(ref objdmass, ref mymat);
+            }
+    
+            // recompute full object inertia if needed
+            if (childrenPrim.Count > 0)
+            {
+                d.Matrix3 mat = new d.Matrix3();
+                d.Quaternion quat = new d.Quaternion();
+                d.Mass tmpdmass = new d.Mass { };
+                Vector3 rcm;
+
+                rcm.X = _position.X;
+                rcm.Y = _position.Y;
+                rcm.Z = _position.Z;
+
+                lock (childrenPrim)
+                {
+                    foreach (OdePrim prm in childrenPrim)
+                    {
+                        if (prm.prim_geom == IntPtr.Zero)
+                        {
+                            m_log.Warn("[PHYSICS]: Unable to link one of the linkset elements, skipping it.  No geom yet");
+                            continue;
+                        }
+
+                        quat.X = prm._orientation.X;
+                        quat.Y = prm._orientation.Y;
+                        quat.Z = prm._orientation.Z;
+                        quat.W = prm._orientation.W;
+                        d.RfromQ(out mat, ref quat);
+
+                        // fix prim colision cats
+
+                        if (d.GeomGetBody(prm.prim_geom) != IntPtr.Zero)
+                        {
+                            d.GeomSetBody(prm.prim_geom, IntPtr.Zero);
+                            m_log.Warn("[PHYSICS]: MakeBody child geom already had a body");
+                        }
+
+                        d.GeomClearOffset(prm.prim_geom);
+                        d.GeomSetBody(prm.prim_geom, Body);
+                        prm.Body = Body;
+                        d.GeomSetOffsetWorldRotation(prm.prim_geom, ref mat); // set relative rotation
+
+                        if(noInertiaOverride)
+                        {
+                            tmpdmass = prm.primdMass;
+
+                            d.MassRotate(ref tmpdmass, ref mat);
+                            Vector3 ppos = prm._position;
+                            ppos.X -= rcm.X;
+                            ppos.Y -= rcm.Y;
+                            ppos.Z -= rcm.Z;
+                            // refer inertia to root prim center of mass position
+                            d.MassTranslate(ref tmpdmass,
+                                ppos.X,
+                                ppos.Y,
+                                ppos.Z);
+
+                            d.MassAdd(ref objdmass, ref tmpdmass); // add to total object inertia
+                        }
+                    }
+                }
+            }
+
+            d.GeomClearOffset(prim_geom); // make sure we don't have a hidden offset
+            // associate root geom with body
+            d.GeomSetBody(prim_geom, Body);
+
+            if(noInertiaOverride)
+                d.BodySetPosition(Body, _position.X + objdmass.c.X, _position.Y + objdmass.c.Y, _position.Z + objdmass.c.Z);
+            else
+            {
+                Vector3 ncm =  m_InertiaOverride.CenterOfMass * _orientation;
+                d.BodySetPosition(Body,
+                    _position.X + ncm.X,
+                    _position.Y + ncm.Y,
+                    _position.Z + ncm.Z);
+            }
+
+            d.GeomSetOffsetWorldPosition(prim_geom, _position.X, _position.Y, _position.Z);
+
+            if(noInertiaOverride)
+            {
+                d.MassTranslate(ref objdmass, -objdmass.c.X, -objdmass.c.Y, -objdmass.c.Z); // ode wants inertia at center of body
+                myrot.X = -myrot.X;
+                myrot.Y = -myrot.Y;
+                myrot.Z = -myrot.Z;
+
+                d.RfromQ(out mymat, ref myrot);
+                d.MassRotate(ref objdmass, ref mymat);
+
+                d.BodySetMass(Body, ref objdmass);
+                m_mass = objdmass.mass;
+            }
+            else
+            {
+                objdmass.c.X = 0;
+                objdmass.c.Y = 0;
+                objdmass.c.Z = 0;
+
+                objdmass.I.M00 = m_InertiaOverride.Inertia.X;
+                objdmass.I.M11 = m_InertiaOverride.Inertia.Y;
+                objdmass.I.M22 = m_InertiaOverride.Inertia.Z;
+
+                objdmass.mass = m_InertiaOverride.TotalMass;
+
+                if(Math.Abs(m_InertiaOverride.InertiaRotation.W) < 0.999)
+                {
+                    d.Matrix3 inertiarotmat = new d.Matrix3();
+                    d.Quaternion inertiarot = new d.Quaternion();
+
+                    inertiarot.X = m_InertiaOverride.InertiaRotation.X;
+                    inertiarot.Y = m_InertiaOverride.InertiaRotation.Y;
+                    inertiarot.Z = m_InertiaOverride.InertiaRotation.Z;
+                    inertiarot.W = m_InertiaOverride.InertiaRotation.W;
+                    d.RfromQ(out inertiarotmat, ref inertiarot);
+                    d.MassRotate(ref objdmass, ref inertiarotmat);
+                }
+                d.BodySetMass(Body, ref objdmass);
+
+                m_mass = objdmass.mass;
+            }
+
+            // disconnect from world gravity so we can apply buoyancy
+            d.BodySetGravityMode(Body, false);
+
+            d.BodySetAutoDisableFlag(Body, true);
+            d.BodySetAutoDisableSteps(Body, m_body_autodisable_frames);
+            d.BodySetAutoDisableAngularThreshold(Body, 0.05f);
+            d.BodySetAutoDisableLinearThreshold(Body, 0.05f);
+            d.BodySetDamping(Body, .004f, .001f);
+
+            if (m_targetSpace != IntPtr.Zero)
+            {
+                _parent_scene.waitForSpaceUnlock(m_targetSpace);
+                if (d.SpaceQuery(m_targetSpace, prim_geom))
+                    d.SpaceRemove(m_targetSpace, prim_geom);
+            }
+
+            if (childrenPrim.Count == 0)
+            {
+                collide_geom = prim_geom;
+                m_targetSpace = _parent_scene.ActiveSpace;
+            }
+            else
+            {
+                m_targetSpace = d.HashSpaceCreate(_parent_scene.ActiveSpace);
+                d.HashSpaceSetLevels(m_targetSpace, -2, 8);
+                d.SpaceSetSublevel(m_targetSpace, 3);
+                d.SpaceSetCleanup(m_targetSpace, false);
+
+                d.GeomSetCategoryBits(m_targetSpace, (uint)(CollisionCategories.Space |
+                                                            CollisionCategories.Geom |
+                                                            CollisionCategories.Phantom |
+                                                            CollisionCategories.VolumeDtc
+                                                            ));
+                d.GeomSetCollideBits(m_targetSpace, 0);
+                collide_geom = m_targetSpace;
+            }
+
+            d.SpaceAdd(m_targetSpace, prim_geom);
+
+            if (m_delaySelect)
+            {
+                m_isSelected = true;
+                m_delaySelect = false;
+            }
+
+            m_collisionscore = 0;
+
+            UpdateCollisionCatFlags();
+            ApplyCollisionCatFlags();
+
+            _parent_scene.addActivePrim(this);
+
+            lock (childrenPrim)
+            {
+                foreach (OdePrim prm in childrenPrim)
+                {
+                    if (prm.prim_geom == IntPtr.Zero)
+                        continue;
+
+                    Vector3 ppos = prm._position;
+                    d.GeomSetOffsetWorldPosition(prm.prim_geom, ppos.X, ppos.Y, ppos.Z); // set relative position
+
+                    if (prm.m_targetSpace != m_targetSpace)
+                    {
+                        if (prm.m_targetSpace != IntPtr.Zero)
+                        {
+                            _parent_scene.waitForSpaceUnlock(prm.m_targetSpace);
+                            if (d.SpaceQuery(prm.m_targetSpace, prm.prim_geom))
+                                d.SpaceRemove(prm.m_targetSpace, prm.prim_geom);
+                        }
+                        prm.m_targetSpace = m_targetSpace;
+                        d.SpaceAdd(m_targetSpace, prm.prim_geom);
+                    }
+
+                    prm.m_collisionscore = 0;
+
+                    if(!m_disabled)
+                        prm.m_disabled = false;
+
+                    _parent_scene.addActivePrim(prm);
+                }
+            }
+
+            // The body doesn't already have a finite rotation mode set here
+            if (m_angularlocks != 0 && _parent == null)
+            {
+                createAMotor(m_angularlocks);
+            }
+
+            if (m_isSelected || m_disabled)
+            {
+                d.BodyDisable(Body);
+                _zeroFlag = true;
+            }
+            else
+            {
+                d.BodySetAngularVel(Body, m_rotationalVelocity.X, m_rotationalVelocity.Y, m_rotationalVelocity.Z);
+                d.BodySetLinearVel(Body, _velocity.X, _velocity.Y, _velocity.Z);
+
+                _zeroFlag = false;
+                m_bodydisablecontrol = 0;
+            }
+            _parent_scene.addActiveGroups(this);
+        }
+
+        private void DestroyBody()
+        {
+            if (Body != IntPtr.Zero)
+            {
+                _parent_scene.remActivePrim(this);
+
+                collide_geom = IntPtr.Zero;
+
+                if (m_disabled)
+                    m_collisionCategories = 0;
+                else if (m_isSelected)
+                    m_collisionCategories = CollisionCategories.Selected;
+                else if (m_isVolumeDetect)
+                    m_collisionCategories = CollisionCategories.VolumeDtc;
+                else if (m_isphantom)
+                    m_collisionCategories = CollisionCategories.Phantom;
+                else
+                    m_collisionCategories = CollisionCategories.Geom;
+
+                m_collisionFlags = 0;
+
+                if (prim_geom != IntPtr.Zero)
+                {
+                    if (m_NoColide)
+                    {
+                        d.GeomSetCategoryBits(prim_geom, 0);
+                        d.GeomSetCollideBits(prim_geom, 0);
+                    }
+                    else
+                    {
+                        d.GeomSetCategoryBits(prim_geom, (uint)m_collisionCategories);
+                        d.GeomSetCollideBits(prim_geom, (uint)m_collisionFlags);
+                    }
+                    UpdateDataFromGeom();
+                    d.GeomSetBody(prim_geom, IntPtr.Zero);
+                    SetInStaticSpace(this);
+                }
+
+                if (!childPrim)
+                {
+                    lock (childrenPrim)
+                    {
+                        foreach (OdePrim prm in childrenPrim)
+                        {
+                            _parent_scene.remActivePrim(prm);
+
+                            if (prm.m_isSelected)
+                                prm.m_collisionCategories = CollisionCategories.Selected;
+                            else if (prm.m_isVolumeDetect)
+                                prm.m_collisionCategories = CollisionCategories.VolumeDtc;
+                            else if (prm.m_isphantom)
+                                prm.m_collisionCategories = CollisionCategories.Phantom;
+                            else
+                                prm.m_collisionCategories = CollisionCategories.Geom;
+
+                            prm.m_collisionFlags = 0;
+
+                            if (prm.prim_geom != IntPtr.Zero)
+                            {
+                                if (prm.m_NoColide)
+                                {
+                                    d.GeomSetCategoryBits(prm.prim_geom, 0);
+                                    d.GeomSetCollideBits(prm.prim_geom, 0);
+                                }
+                                else
+                                {
+                                    d.GeomSetCategoryBits(prm.prim_geom, (uint)prm.m_collisionCategories);
+                                    d.GeomSetCollideBits(prm.prim_geom, (uint)prm.m_collisionFlags);
+                                }
+                                prm.UpdateDataFromGeom();
+                                SetInStaticSpace(prm);
+                            }
+                            prm.Body = IntPtr.Zero;
+                            prm.m_mass = prm.primMass;
+                            prm.m_collisionscore = 0;
+                        }
+                    }
+                    if (Amotor != IntPtr.Zero)
+                    {
+                        d.JointDestroy(Amotor);
+                        Amotor = IntPtr.Zero;
+                    }
+                    _parent_scene.remActiveGroup(this);
+                    d.BodyDestroy(Body);
+                }
+                Body = IntPtr.Zero;
+            }
+            m_mass = primMass;
+            m_collisionscore = 0;
+        }
+
+        private void FixInertia(Vector3 NewPos,Quaternion newrot)
+        {
+            d.Matrix3 mat = new d.Matrix3();
+            d.Quaternion quat = new d.Quaternion();
+
+            d.Mass tmpdmass = new d.Mass { };
+            d.Mass objdmass = new d.Mass { };
+
+            d.BodyGetMass(Body, out tmpdmass);
+            objdmass = tmpdmass;
+
+            d.Vector3 dobjpos;
+            d.Vector3 thispos;
+
+            // get current object position and rotation
+            dobjpos = d.BodyGetPosition(Body);
+
+            // get prim own inertia in its local frame
+            tmpdmass = primdMass;
+
+            // transform to object frame
+            mat = d.GeomGetOffsetRotation(prim_geom);
+            d.MassRotate(ref tmpdmass, ref mat);
+
+            thispos = d.GeomGetOffsetPosition(prim_geom);
+            d.MassTranslate(ref tmpdmass,
+                            thispos.X,
+                            thispos.Y,
+                            thispos.Z);
+
+            // subtract current prim inertia from object
+            DMassSubPartFromObj(ref tmpdmass, ref objdmass);
+
+            // back prim own inertia
+            tmpdmass = primdMass;
+
+            // update to new position and orientation
+            _position = NewPos;
+            d.GeomSetOffsetWorldPosition(prim_geom, NewPos.X, NewPos.Y, NewPos.Z);
+            _orientation = newrot;
+            quat.X = newrot.X;
+            quat.Y = newrot.Y;
+            quat.Z = newrot.Z;
+            quat.W = newrot.W;
+            d.GeomSetOffsetWorldQuaternion(prim_geom, ref quat);
+
+            mat = d.GeomGetOffsetRotation(prim_geom);
+            d.MassRotate(ref tmpdmass, ref mat);
+
+            thispos = d.GeomGetOffsetPosition(prim_geom);
+            d.MassTranslate(ref tmpdmass,
+                            thispos.X,
+                            thispos.Y,
+                            thispos.Z);
+
+            d.MassAdd(ref objdmass, ref tmpdmass);
+
+            // fix all positions
+            IntPtr g = d.BodyGetFirstGeom(Body);
+            while (g != IntPtr.Zero)
+            {
+                thispos = d.GeomGetOffsetPosition(g);
+                thispos.X -= objdmass.c.X;
+                thispos.Y -= objdmass.c.Y;
+                thispos.Z -= objdmass.c.Z;
+                d.GeomSetOffsetPosition(g, thispos.X, thispos.Y, thispos.Z);
+                g = d.dBodyGetNextGeom(g);
+            }
+            d.BodyVectorToWorld(Body,objdmass.c.X, objdmass.c.Y, objdmass.c.Z,out thispos);
+
+            d.BodySetPosition(Body, dobjpos.X + thispos.X, dobjpos.Y + thispos.Y, dobjpos.Z + thispos.Z);
+            d.MassTranslate(ref objdmass, -objdmass.c.X, -objdmass.c.Y, -objdmass.c.Z); // ode wants inertia at center of body
+            d.BodySetMass(Body, ref objdmass);
+            m_mass = objdmass.mass;
+        }
+
+        private void FixInertia(Vector3 NewPos)
+        {
+            d.Matrix3 primmat = new d.Matrix3();
+            d.Mass tmpdmass = new d.Mass { };
+            d.Mass objdmass = new d.Mass { };
+            d.Mass primmass = new d.Mass { };
+
+            d.Vector3 dobjpos;
+            d.Vector3 thispos;
+
+            d.BodyGetMass(Body, out objdmass);
+
+            // get prim own inertia in its local frame
+            primmass = primdMass;
+            // transform to object frame
+            primmat = d.GeomGetOffsetRotation(prim_geom);
+            d.MassRotate(ref primmass, ref primmat);
+
+            tmpdmass = primmass;
+
+            thispos = d.GeomGetOffsetPosition(prim_geom);
+            d.MassTranslate(ref tmpdmass,
+                            thispos.X,
+                            thispos.Y,
+                            thispos.Z);
+
+            // subtract current prim inertia from object
+            DMassSubPartFromObj(ref tmpdmass, ref objdmass);
+
+            // update to new position
+            _position = NewPos;
+            d.GeomSetOffsetWorldPosition(prim_geom, NewPos.X, NewPos.Y, NewPos.Z);
+
+            thispos = d.GeomGetOffsetPosition(prim_geom);
+            d.MassTranslate(ref primmass,
+                            thispos.X,
+                            thispos.Y,
+                            thispos.Z);
+
+            d.MassAdd(ref objdmass, ref primmass);
+
+            // fix all positions
+            IntPtr g = d.BodyGetFirstGeom(Body);
+            while (g != IntPtr.Zero)
+            {
+                thispos = d.GeomGetOffsetPosition(g);
+                thispos.X -= objdmass.c.X;
+                thispos.Y -= objdmass.c.Y;
+                thispos.Z -= objdmass.c.Z;
+                d.GeomSetOffsetPosition(g, thispos.X, thispos.Y, thispos.Z);
+                g = d.dBodyGetNextGeom(g);
+            }
+
+            d.BodyVectorToWorld(Body, objdmass.c.X, objdmass.c.Y, objdmass.c.Z, out thispos);
+
+            // get current object position and rotation
+            dobjpos = d.BodyGetPosition(Body);
+
+            d.BodySetPosition(Body, dobjpos.X + thispos.X, dobjpos.Y + thispos.Y, dobjpos.Z + thispos.Z);
+            d.MassTranslate(ref objdmass, -objdmass.c.X, -objdmass.c.Y, -objdmass.c.Z); // ode wants inertia at center of body
+            d.BodySetMass(Body, ref objdmass);
+            m_mass = objdmass.mass;
+        }
+
+        private void FixInertia(Quaternion newrot)
+        {
+            d.Matrix3 mat = new d.Matrix3();
+            d.Quaternion quat = new d.Quaternion();
+
+            d.Mass tmpdmass = new d.Mass { };
+            d.Mass objdmass = new d.Mass { };
+            d.Vector3 dobjpos;
+            d.Vector3 thispos;
+
+            d.BodyGetMass(Body, out objdmass);
+
+            // get prim own inertia in its local frame
+            tmpdmass = primdMass;
+            mat = d.GeomGetOffsetRotation(prim_geom);
+            d.MassRotate(ref tmpdmass, ref mat);
+            // transform to object frame
+            thispos = d.GeomGetOffsetPosition(prim_geom);
+            d.MassTranslate(ref tmpdmass,
+                            thispos.X,
+                            thispos.Y,
+                            thispos.Z);
+
+            // subtract current prim inertia from object
+            DMassSubPartFromObj(ref tmpdmass, ref objdmass);
+
+            // update to new orientation
+            _orientation = newrot;
+            quat.X = newrot.X;
+            quat.Y = newrot.Y;
+            quat.Z = newrot.Z;
+            quat.W = newrot.W;
+            d.GeomSetOffsetWorldQuaternion(prim_geom, ref quat);
+
+            tmpdmass = primdMass;
+            mat = d.GeomGetOffsetRotation(prim_geom);
+            d.MassRotate(ref tmpdmass, ref mat);
+            d.MassTranslate(ref tmpdmass,
+                            thispos.X,
+                            thispos.Y,
+                            thispos.Z);
+
+            d.MassAdd(ref objdmass, ref tmpdmass);
+
+            // fix all positions
+            IntPtr g = d.BodyGetFirstGeom(Body);
+            while (g != IntPtr.Zero)
+            {
+                thispos = d.GeomGetOffsetPosition(g);
+                thispos.X -= objdmass.c.X;
+                thispos.Y -= objdmass.c.Y;
+                thispos.Z -= objdmass.c.Z;
+                d.GeomSetOffsetPosition(g, thispos.X, thispos.Y, thispos.Z);
+                g = d.dBodyGetNextGeom(g);
+            }
+
+            d.BodyVectorToWorld(Body, objdmass.c.X, objdmass.c.Y, objdmass.c.Z, out thispos);
+            // get current object position and rotation
+            dobjpos = d.BodyGetPosition(Body);
+
+            d.BodySetPosition(Body, dobjpos.X + thispos.X, dobjpos.Y + thispos.Y, dobjpos.Z + thispos.Z);
+            d.MassTranslate(ref objdmass, -objdmass.c.X, -objdmass.c.Y, -objdmass.c.Z); // ode wants inertia at center of body
+            d.BodySetMass(Body, ref objdmass);
+            m_mass = objdmass.mass;
+        }
+
+
+        #region Mass Calculation
+
+        private void UpdatePrimBodyData()
+        {
+            primMass = m_density * primVolume;
+
+            if (primMass <= 0)
+                primMass = 0.0001f;//ckrinke: Mass must be greater then zero.
+            if (primMass > _parent_scene.maximumMassObject)
+                primMass = _parent_scene.maximumMassObject;
+
+            m_mass = primMass; // just in case
+
+            d.MassSetBoxTotal(out primdMass, primMass, 2.0f * m_OBB.X, 2.0f * m_OBB.Y, 2.0f * m_OBB.Z);
+
+            d.MassTranslate(ref primdMass,
+                                m_OBBOffset.X,
+                                m_OBBOffset.Y,
+                                m_OBBOffset.Z);
+
+            primOOBradiusSQ = m_OBB.LengthSquared();
+
+            if (_triMeshData != IntPtr.Zero)
+            {
+                float pc = m_physCost;
+                float psf = primOOBradiusSQ;
+                psf *= 1.33f * .2f;
+                pc *= psf;
+                if (pc < 0.1f)
+                    pc = 0.1f;
+
+                m_physCost = pc;
+            }
+            else
+                m_physCost = 0.1f;
+
+            m_streamCost = 1.0f;
+        }
+
+        #endregion
+
+
+        /// <summary>
+        /// Add a child prim to this parent prim.
+        /// </summary>
+        /// <param name="prim">Child prim</param>
+        // I'm the parent
+        // prim is the child
+        public void ParentPrim(OdePrim prim)
+        {
+            //Console.WriteLine("ParentPrim  " + m_primName);
+            if (this.m_localID != prim.m_localID)
+            {
+                DestroyBody();  // for now we need to rebuil entire object on link change
+
+                lock (childrenPrim)
+                {
+                    // adopt the prim
+                    if (!childrenPrim.Contains(prim))
+                        childrenPrim.Add(prim);
+
+                    // see if this prim has kids and adopt them also
+                    // should not happen for now
+                    foreach (OdePrim prm in prim.childrenPrim)
+                    {
+                        if (!childrenPrim.Contains(prm))
+                        {
+                            if (prm.Body != IntPtr.Zero)
+                            {
+                                if (prm.prim_geom != IntPtr.Zero)
+                                    d.GeomSetBody(prm.prim_geom, IntPtr.Zero);
+                                if (prm.Body != prim.Body)
+                                    prm.DestroyBody(); // don't loose bodies around
+                                prm.Body = IntPtr.Zero;
+                            }
+
+                            childrenPrim.Add(prm);
+                            prm._parent = this;
+                        }
+                    }
+                }
+                //Remove old children from the prim
+                prim.childrenPrim.Clear();
+
+                if (prim.Body != IntPtr.Zero)
+                {
+                    if (prim.prim_geom != IntPtr.Zero)
+                        d.GeomSetBody(prim.prim_geom, IntPtr.Zero);
+                    prim.DestroyBody(); // don't loose bodies around
+                    prim.Body = IntPtr.Zero;
+                }
+
+                prim.childPrim = true;
+                prim._parent = this;
+
+                MakeBody(); // full nasty reconstruction
+            }
+        }
+
+        private void UpdateChildsfromgeom()
+        {
+            if (childrenPrim.Count > 0)
+            {
+                foreach (OdePrim prm in childrenPrim)
+                    prm.UpdateDataFromGeom();
+            }
+        }
+
+        private void UpdateDataFromGeom()
+        {
+            if (prim_geom != IntPtr.Zero)
+            {
+                d.Quaternion qtmp;
+                d.GeomCopyQuaternion(prim_geom, out qtmp);
+                _orientation.X = qtmp.X;
+                _orientation.Y = qtmp.Y;
+                _orientation.Z = qtmp.Z;
+                _orientation.W = qtmp.W;
+/*
+// Debug
+                float qlen = _orientation.Length();
+                if (qlen > 1.01f || qlen < 0.99)
+                    m_log.WarnFormat("[PHYSICS]: Got nonnorm quaternion from geom in Object {0} norm {1}", Name, qlen);
+//
+*/
+                _orientation.Normalize();
+
+                d.Vector3 lpos = d.GeomGetPosition(prim_geom);
+                _position.X = lpos.X;
+                _position.Y = lpos.Y;
+                _position.Z = lpos.Z;
+            }
+        }
+
+        private void ChildDelink(OdePrim odePrim, bool remakebodies)
+        {
+            // Okay, we have a delinked child.. destroy all body and remake
+            if (odePrim != this && !childrenPrim.Contains(odePrim))
+                return;
+
+            DestroyBody();
+
+            if (odePrim == this) // delinking the root prim
+            {
+                OdePrim newroot = null;
+                lock (childrenPrim)
+                {
+                    if (childrenPrim.Count > 0)
+                    {
+                        newroot = childrenPrim[0];
+                        childrenPrim.RemoveAt(0);
+                        foreach (OdePrim prm in childrenPrim)
+                        {
+                            newroot.childrenPrim.Add(prm);
+                        }
+                        childrenPrim.Clear();
+                    }
+                    if (newroot != null)
+                    {
+                        newroot.childPrim = false;
+                        newroot._parent = null;
+                        if (remakebodies)
+                            newroot.MakeBody();
+                    }
+                }
+            }
+
+            else
+            {
+                lock (childrenPrim)
+                {
+                    childrenPrim.Remove(odePrim);
+                    odePrim.childPrim = false;
+                    odePrim._parent = null;
+                    //                    odePrim.UpdateDataFromGeom();
+                    if (remakebodies)
+                        odePrim.MakeBody();
+                }
+            }
+            if (remakebodies)
+                MakeBody();
+        }
+
+        protected void ChildRemove(OdePrim odePrim, bool reMakeBody)
+        {
+            // Okay, we have a delinked child.. destroy all body and remake
+            if (odePrim != this && !childrenPrim.Contains(odePrim))
+                return;
+
+            DestroyBody();
+
+            if (odePrim == this)
+            {
+                OdePrim newroot = null;
+                lock (childrenPrim)
+                {
+                    if (childrenPrim.Count > 0)
+                    {
+                        newroot = childrenPrim[0];
+                        childrenPrim.RemoveAt(0);
+                        foreach (OdePrim prm in childrenPrim)
+                        {
+                            newroot.childrenPrim.Add(prm);
+                        }
+                        childrenPrim.Clear();
+                    }
+                    if (newroot != null)
+                    {
+                        newroot.childPrim = false;
+                        newroot._parent = null;
+                        newroot.MakeBody();
+                    }
+                }
+                if (reMakeBody)
+                    MakeBody();
+                return;
+            }
+            else
+            {
+                lock (childrenPrim)
+                {
+                    childrenPrim.Remove(odePrim);
+                    odePrim.childPrim = false;
+                    odePrim._parent = null;
+                    if (reMakeBody)
+                        odePrim.MakeBody();
+                }
+            }
+            MakeBody();
+        }
+
+
+        #region changes
+
+        private void changeadd()
+        {
+            _parent_scene.addToPrims(this);
+        }
+
+        private void changeAngularLock(byte newLocks)
+        {
+            // do we have a Physical object?
+            if (Body != IntPtr.Zero)
+            {
+                //Check that we have a Parent
+                //If we have a parent then we're not authorative here
+                if (_parent == null)
+                {
+                    if (newLocks != 0)
+                    {
+                        createAMotor(newLocks);
+                    }
+                    else
+                    {
+                        if (Amotor != IntPtr.Zero)
+                        {
+                            d.JointDestroy(Amotor);
+                            Amotor = IntPtr.Zero;
+                        }
+                    }
+                }
+            }
+            // Store this for later in case we get turned into a separate body
+            m_angularlocks = newLocks;
+        }
+
+        private void changeLink(OdePrim NewParent)
+        {
+            if (_parent == null && NewParent != null)
+            {
+                NewParent.ParentPrim(this);
+            }
+            else if (_parent != null)
+            {
+                if (_parent is OdePrim)
+                {
+                    if (NewParent != _parent)
+                    {
+                        (_parent as OdePrim).ChildDelink(this, false); // for now...
+                        childPrim = false;
+
+                        if (NewParent != null)
+                        {
+                            NewParent.ParentPrim(this);
+                        }
+                    }
+                }
+            }
+            _parent = NewParent;
+        }
+
+
+        private void Stop()
+        {
+            if (!childPrim)
+            {
+//                m_force = Vector3.Zero;
+                m_forceacc = Vector3.Zero;
+                m_angularForceacc = Vector3.Zero;
+//                m_torque = Vector3.Zero;
+                _velocity = Vector3.Zero;
+                m_acceleration = Vector3.Zero;
+                m_rotationalVelocity = Vector3.Zero;
+                _target_velocity = Vector3.Zero;
+                if (m_vehicle != null && m_vehicle.Type != Vehicle.TYPE_NONE)
+                    m_vehicle.Stop();
+
+                _zeroFlag = false;
+                base.RequestPhysicsterseUpdate();
+            }
+
+            if (Body != IntPtr.Zero)
+            {
+                d.BodySetForce(Body, 0f, 0f, 0f);
+                d.BodySetTorque(Body, 0f, 0f, 0f);
+                d.BodySetLinearVel(Body, 0f, 0f, 0f);
+                d.BodySetAngularVel(Body, 0f, 0f, 0f);
+            }
+        }
+
+        private void changePhantomStatus(bool newval)
+        {
+            m_isphantom = newval;
+
+            UpdateCollisionCatFlags();
+            ApplyCollisionCatFlags();
+        }
+
+/* not in use
+        internal void ChildSelectedChange(bool childSelect)
+        {
+            if(childPrim)
+                return;
+
+            if (childSelect == m_isSelected)
+                return;
+
+            if (childSelect)
+            {
+                DoSelectedStatus(true);
+            }
+
+            else
+            {
+                foreach (OdePrim prm in childrenPrim)
+                {
+                    if (prm.m_isSelected)
+                        return;
+                }
+                DoSelectedStatus(false);
+            }
+        }
+*/
+        private void changeSelectedStatus(bool newval)
+        {
+            if (m_lastdoneSelected == newval)
+                return;
+
+            m_lastdoneSelected = newval;
+            DoSelectedStatus(newval);
+        }
+
+        private void CheckDelaySelect()
+        {
+            if (m_delaySelect)
+            {
+                DoSelectedStatus(m_isSelected);
+            }
+        }
+
+        private void DoSelectedStatus(bool newval)
+        {
+            m_isSelected = newval;
+            Stop();
+
+            if (newval)
+            {
+                if (!childPrim && Body != IntPtr.Zero)
+                    d.BodyDisable(Body);
+
+                if (m_delaySelect || m_isphysical)
+                {
+                    m_collisionCategories = CollisionCategories.Selected;
+                    m_collisionFlags = 0;
+
+                    if (!childPrim)
+                    {
+                        foreach (OdePrim prm in childrenPrim)
+                        {
+                            prm.m_collisionCategories = m_collisionCategories;
+                            prm.m_collisionFlags = m_collisionFlags;
+
+                            if (prm.prim_geom != IntPtr.Zero)
+                            {
+
+                                if (prm.m_NoColide)
+                                {
+                                    d.GeomSetCategoryBits(prm.prim_geom, 0);
+                                    d.GeomSetCollideBits(prm.prim_geom, 0);
+                                }
+                                else
+                                {
+                                    d.GeomSetCategoryBits(prm.prim_geom, (uint)m_collisionCategories);
+                                    d.GeomSetCollideBits(prm.prim_geom, (uint)m_collisionFlags);
+                                }
+                            }
+                            prm.m_delaySelect = false;
+                        }
+                    }
+//                    else if (_parent != null)
+//                        ((OdePrim)_parent).ChildSelectedChange(true);
+
+
+                    if (prim_geom != IntPtr.Zero)
+                    {
+                        if (m_NoColide)
+                        {
+                            d.GeomSetCategoryBits(prim_geom, 0);
+                            d.GeomSetCollideBits(prim_geom, 0);
+                            if (collide_geom != prim_geom && collide_geom != IntPtr.Zero)
+                            {
+                                d.GeomSetCategoryBits(collide_geom, 0);
+                                d.GeomSetCollideBits(collide_geom, 0);
+                            }
+
+                        }
+                        else
+                        {
+                            d.GeomSetCategoryBits(prim_geom, (uint)m_collisionCategories);
+                            d.GeomSetCollideBits(prim_geom, (uint)m_collisionFlags);
+                            if (collide_geom != prim_geom && collide_geom != IntPtr.Zero)
+                            {
+                                d.GeomSetCategoryBits(collide_geom, (uint)m_collisionCategories);
+                                d.GeomSetCollideBits(collide_geom, (uint)m_collisionFlags);
+                            }
+                        }
+                    }
+
+                    m_delaySelect = false;
+                }
+                else if(!m_isphysical)
+                {
+                    m_delaySelect = true;
+                }
+            }
+            else
+            {
+                if (!childPrim)
+                {
+                    if (Body != IntPtr.Zero && !m_disabled)
+                    {
+                        _zeroFlag = true;
+                        d.BodySetAutoDisableSteps(Body, m_body_autodisable_frames);
+                        d.BodyEnable(Body);
+                    }
+                }
+//                else if (_parent != null)
+//                    ((OdePrim)_parent).ChildSelectedChange(false);
+
+                UpdateCollisionCatFlags();
+                ApplyCollisionCatFlags();
+
+                m_delaySelect = false;
+            }
+
+            resetCollisionAccounting();
+        }
+
+        private void changePosition(Vector3 newPos)
+        {
+            CheckDelaySelect();
+            if (m_isphysical)
+            {
+                if (childPrim)  // inertia is messed, must rebuild
+                {
+                    if (m_building)
+                    {
+                        _position = newPos;
+                    }
+
+                    else if (m_forcePosOrRotation && _position != newPos && Body != IntPtr.Zero)
+                    {
+                        FixInertia(newPos);
+                        if (!d.BodyIsEnabled(Body))
+                        {
+                            _zeroFlag = true;
+                            d.BodySetAutoDisableSteps(Body, m_body_autodisable_frames);
+                            d.BodyEnable(Body);
+                        }
+                    }
+                }
+                else
+                {
+                    if (_position != newPos)
+                    {
+                        d.GeomSetPosition(prim_geom, newPos.X, newPos.Y, newPos.Z);
+                        _position = newPos;
+                    }
+                    if (Body != IntPtr.Zero && !d.BodyIsEnabled(Body))
+                    {
+                        _zeroFlag = true;
+                        d.BodySetAutoDisableSteps(Body, m_body_autodisable_frames);
+                        d.BodyEnable(Body);
+                    }
+                }
+            }
+            else
+            {
+                if (prim_geom != IntPtr.Zero)
+                {
+                    if (newPos != _position)
+                    {
+                        d.GeomSetPosition(prim_geom, newPos.X, newPos.Y, newPos.Z);
+                        _position = newPos;
+
+                        m_targetSpace = _parent_scene.MoveGeomToStaticSpace(prim_geom, _position, m_targetSpace);
+                    }
+                }
+            }
+            givefakepos--;
+            if (givefakepos < 0)
+                givefakepos = 0;
+//            changeSelectedStatus();
+            resetCollisionAccounting();
+        }
+
+        private void changeOrientation(Quaternion newOri)
+        {
+            CheckDelaySelect();
+            if (m_isphysical)
+            {
+                if (childPrim)  // inertia is messed, must rebuild
+                {
+                    if (m_building)
+                    {
+                        _orientation = newOri;
+                    }
+/*
+                    else if (m_forcePosOrRotation && _orientation != newOri && Body != IntPtr.Zero)
+                    {
+                        FixInertia(_position, newOri);
+                        if (!d.BodyIsEnabled(Body))
+                            d.BodyEnable(Body);
+                    }
+*/
+                }
+                else
+                {
+                    if (newOri != _orientation)
+                    {
+                        d.Quaternion myrot = new d.Quaternion();
+                        myrot.X = newOri.X;
+                        myrot.Y = newOri.Y;
+                        myrot.Z = newOri.Z;
+                        myrot.W = newOri.W;
+                        d.GeomSetQuaternion(prim_geom, ref myrot);
+                        _orientation = newOri;
+                        
+                        if (Body != IntPtr.Zero)
+                        {
+                            if(m_angularlocks != 0)
+                                createAMotor(m_angularlocks);
+                        }
+                    }
+                    if (Body != IntPtr.Zero && !d.BodyIsEnabled(Body))
+                    {
+                        _zeroFlag = true;
+                        d.BodySetAutoDisableSteps(Body, m_body_autodisable_frames);
+                        d.BodyEnable(Body);
+                    }
+                }
+            }
+            else
+            {
+                if (prim_geom != IntPtr.Zero)
+                {
+                    if (newOri != _orientation)
+                    {
+                        d.Quaternion myrot = new d.Quaternion();
+                        myrot.X = newOri.X;
+                        myrot.Y = newOri.Y;
+                        myrot.Z = newOri.Z;
+                        myrot.W = newOri.W;
+                        d.GeomSetQuaternion(prim_geom, ref myrot);
+                        _orientation = newOri;
+                    }
+                }
+            }
+            givefakeori--;
+            if (givefakeori < 0)
+                givefakeori = 0;
+            resetCollisionAccounting();
+        }
+
+        private void changePositionAndOrientation(Vector3 newPos, Quaternion newOri)
+        {
+            CheckDelaySelect();
+            if (m_isphysical)
+            {
+                if (childPrim && m_building)  // inertia is messed, must rebuild
+                {
+                    _position = newPos;
+                    _orientation = newOri;
+                }
+                else
+                {
+                    if (newOri != _orientation)
+                    {
+                        d.Quaternion myrot = new d.Quaternion();
+                        myrot.X = newOri.X;
+                        myrot.Y = newOri.Y;
+                        myrot.Z = newOri.Z;
+                        myrot.W = newOri.W;
+                        d.GeomSetQuaternion(prim_geom, ref myrot);
+                        _orientation = newOri;
+                        if (Body != IntPtr.Zero && m_angularlocks != 0)
+                            createAMotor(m_angularlocks);
+                    }
+                    if (_position != newPos)
+                    {
+                        d.GeomSetPosition(prim_geom, newPos.X, newPos.Y, newPos.Z);
+                        _position = newPos;
+                    }
+                    if (Body != IntPtr.Zero && !d.BodyIsEnabled(Body))
+                    {
+                        _zeroFlag = true;
+                        d.BodySetAutoDisableSteps(Body, m_body_autodisable_frames);
+                        d.BodyEnable(Body);
+                    }
+                }
+            }
+            else
+            {
+                // string primScenAvatarIn = _parent_scene.whichspaceamIin(_position);
+                // int[] arrayitem = _parent_scene.calculateSpaceArrayItemFromPos(_position);
+
+                if (prim_geom != IntPtr.Zero)
+                {
+                    if (newOri != _orientation)
+                    {
+                        d.Quaternion myrot = new d.Quaternion();
+                        myrot.X = newOri.X;
+                        myrot.Y = newOri.Y;
+                        myrot.Z = newOri.Z;
+                        myrot.W = newOri.W;
+                        d.GeomSetQuaternion(prim_geom, ref myrot);
+                        _orientation = newOri;
+                    }
+
+                    if (newPos != _position)
+                    {
+                        d.GeomSetPosition(prim_geom, newPos.X, newPos.Y, newPos.Z);
+                        _position = newPos;
+
+                        m_targetSpace = _parent_scene.MoveGeomToStaticSpace(prim_geom, _position, m_targetSpace);
+                    }
+                }
+            }
+            givefakepos--;
+            if (givefakepos < 0)
+                givefakepos = 0;
+            givefakeori--;
+            if (givefakeori < 0)
+                givefakeori = 0;
+            resetCollisionAccounting();
+        }
+
+        private void changeDisable(bool disable)
+        {
+            if (disable)
+            {
+                if (!m_disabled)
+                    disableBodySoft();
+            }
+            else
+            {
+                if (m_disabled)
+                    enableBodySoft();
+            }
+        }
+
+        private void changePhysicsStatus(bool NewStatus)
+        {
+            CheckDelaySelect();
+
+            m_isphysical = NewStatus;
+
+            if (!childPrim)
+            {
+                if (NewStatus)
+                {
+                    if (Body == IntPtr.Zero)
+                        MakeBody();
+                }
+                else
+                {
+                    if (Body != IntPtr.Zero)
+                    {
+                        DestroyBody();
+                    }
+                    Stop();
+                }
+            }
+
+            resetCollisionAccounting();
+        }
+
+        private void changeSize(Vector3 newSize)
+        {
+        }
+
+        private void changeShape(PrimitiveBaseShape newShape)
+        {
+        }
+
+        private void changeAddPhysRep(ODEPhysRepData repData)
+        {
+            _size = repData.size; //??
+            _pbs = repData.pbs;
+
+            m_mesh = repData.mesh;
+
+            m_assetID = repData.assetID;
+            m_meshState = repData.meshState;
+
+            m_hasOBB = repData.hasOBB;
+            m_OBBOffset = repData.OBBOffset;
+            m_OBB = repData.OBB;
+
+            primVolume = repData.volume;
+
+            CreateGeom(repData.isTooSmall);
+
+            if (prim_geom != IntPtr.Zero)
+            {
+                d.GeomSetPosition(prim_geom, _position.X, _position.Y, _position.Z);
+                d.Quaternion myrot = new d.Quaternion();
+                myrot.X = _orientation.X;
+                myrot.Y = _orientation.Y;
+                myrot.Z = _orientation.Z;
+                myrot.W = _orientation.W;
+                d.GeomSetQuaternion(prim_geom, ref myrot);
+            }
+
+            if (!m_isphysical)
+            {
+                SetInStaticSpace(this);
+                UpdateCollisionCatFlags();
+                ApplyCollisionCatFlags();
+            }
+            else
+                MakeBody();
+
+            if ((m_meshState & MeshState.NeedMask) != 0)
+            {
+                repData.size = _size;
+                repData.pbs = _pbs;
+                repData.shapetype = m_fakeShapetype;
+                _parent_scene.m_meshWorker.RequestMesh(repData);
+            }
+            else
+                m_shapetype = repData.shapetype;
+        }
+
+        private void changePhysRepData(ODEPhysRepData repData)
+        {
+            if(_size == repData.size &&
+                    _pbs == repData.pbs &&
+                    m_shapetype == repData.shapetype &&
+                    m_mesh == repData.mesh &&
+                    primVolume == repData.volume)
+                return;
+
+            CheckDelaySelect();
+
+            OdePrim parent = (OdePrim)_parent;
+
+            bool chp = childPrim;
+
+            if (chp)
+            {
+                if (parent != null)
+                {
+                    parent.DestroyBody();
+                }
+            }
+            else
+            {
+                DestroyBody();
+            }
+
+            RemoveGeom();
+
+            _size = repData.size;
+            _pbs = repData.pbs;
+
+            m_mesh = repData.mesh;
+
+            m_assetID = repData.assetID;
+            m_meshState = repData.meshState;
+
+            m_hasOBB = repData.hasOBB;
+            m_OBBOffset = repData.OBBOffset;
+            m_OBB = repData.OBB;
+
+            primVolume = repData.volume;
+
+            CreateGeom(repData.isTooSmall);
+
+            if (prim_geom != IntPtr.Zero)
+            {
+                d.GeomSetPosition(prim_geom, _position.X, _position.Y, _position.Z);
+                d.Quaternion myrot = new d.Quaternion();
+                myrot.X = _orientation.X;
+                myrot.Y = _orientation.Y;
+                myrot.Z = _orientation.Z;
+                myrot.W = _orientation.W;
+                d.GeomSetQuaternion(prim_geom, ref myrot);
+            }
+
+            if (m_isphysical)
+            {
+                if (chp)
+                {
+                    if (parent != null)
+                    {
+                        parent.MakeBody();
+                    }
+                }
+                else
+                    MakeBody();
+            }
+            else
+            {
+                SetInStaticSpace(this);
+                UpdateCollisionCatFlags();
+                ApplyCollisionCatFlags();
+            }
+
+            resetCollisionAccounting();
+
+            if ((m_meshState & MeshState.NeedMask) != 0)
+            {
+                repData.size = _size;
+                repData.pbs = _pbs;
+                repData.shapetype = m_fakeShapetype;
+                _parent_scene.m_meshWorker.RequestMesh(repData);
+            }
+            else
+                m_shapetype = repData.shapetype;
+        }
+
+        private void changeFloatOnWater(bool newval)
+        {
+            m_collidesWater = newval;
+
+            UpdateCollisionCatFlags();
+            ApplyCollisionCatFlags();
+        }
+
+        private void changeSetTorque(Vector3 newtorque)
+        {
+            if (!m_isSelected && !m_outbounds)
+            {
+                if (m_isphysical && Body != IntPtr.Zero)
+                {
+                    if (m_disabled)
+                        enableBodySoft();
+                    else if (!d.BodyIsEnabled(Body))
+                    {
+                        d.BodySetAutoDisableSteps(Body, m_body_autodisable_frames);
+                        d.BodyEnable(Body);
+                    }
+                }
+                m_torque = newtorque;
+            }
+        }
+
+        private void changeForce(Vector3 force)
+        {
+            m_force = force;
+            if (!m_isSelected && !m_outbounds && Body != IntPtr.Zero && !d.BodyIsEnabled(Body))
+            {
+                d.BodySetAutoDisableSteps(Body, m_body_autodisable_frames);
+                d.BodyEnable(Body);
+            }
+        }
+
+        private void changeAddForce(Vector3 theforce)
+        {
+            m_forceacc += theforce;
+            if (!m_isSelected && !m_outbounds)
+            {
+                lock (this)
+                {
+                    //m_log.Info("[PHYSICS]: dequeing forcelist");
+                    if (m_isphysical && Body != IntPtr.Zero)
+                    {
+                        if (m_disabled)
+                            enableBodySoft();
+                        else if (!d.BodyIsEnabled(Body))
+                        {
+                            d.BodySetAutoDisableSteps(Body, m_body_autodisable_frames);
+                            d.BodyEnable(Body);
+                        }
+                    }
+                }
+                m_collisionscore = 0;
+            }
+        }
+
+        // actually angular impulse
+        private void changeAddAngularImpulse(Vector3 aimpulse)
+        {
+            m_angularForceacc += aimpulse * m_invTimeStep;
+            if (!m_isSelected && !m_outbounds)
+            {
+                lock (this)
+                {
+                    if (m_isphysical && Body != IntPtr.Zero)
+                    {
+                        if (m_disabled)
+                            enableBodySoft();
+                        else if (!d.BodyIsEnabled(Body))
+                        {
+                            d.BodySetAutoDisableSteps(Body, m_body_autodisable_frames);
+                            d.BodyEnable(Body);
+                        }                            
+                    }
+                }
+                m_collisionscore = 0;
+            }
+        }
+
+        private void changevelocity(Vector3 newVel)
+        {
+            float len = newVel.LengthSquared();
+            if (len > 100000.0f) // limit to 100m/s
+            {
+                len = 100.0f / (float)Math.Sqrt(len);
+                newVel *= len;
+            }
+
+            if (!m_isSelected && !m_outbounds)
+            {
+                if (Body != IntPtr.Zero)
+                {
+                    if (m_disabled)
+                        enableBodySoft();
+                    else if (!d.BodyIsEnabled(Body))
+                    {
+                        d.BodySetAutoDisableSteps(Body, m_body_autodisable_frames);
+                        d.BodyEnable(Body);
+                    }
+                    d.BodySetLinearVel(Body, newVel.X, newVel.Y, newVel.Z);
+                }
+                //resetCollisionAccounting();
+            }
+            _velocity = newVel;
+        }
+
+        private void changeangvelocity(Vector3 newAngVel)
+        {
+            float len = newAngVel.LengthSquared();
+            if (len > _parent_scene.maxAngVelocitySQ)
+            {
+                len = _parent_scene.maximumAngularVelocity / (float)Math.Sqrt(len);
+                newAngVel *= len;
+            }
+
+            if (!m_isSelected && !m_outbounds)
+            {
+                if (Body != IntPtr.Zero)
+                {
+                    if (m_disabled)
+                        enableBodySoft();
+                    else if (!d.BodyIsEnabled(Body))
+                    {
+                        d.BodySetAutoDisableSteps(Body, m_body_autodisable_frames);
+                        d.BodyEnable(Body);
+                    }
+                    d.BodySetAngularVel(Body, newAngVel.X, newAngVel.Y, newAngVel.Z);
+                }
+                //resetCollisionAccounting();
+            }
+            m_rotationalVelocity = newAngVel;
+        }
+
+        private void changeVolumedetetion(bool newVolDtc)
+        {
+            m_isVolumeDetect = newVolDtc;
+            m_fakeisVolumeDetect = newVolDtc;
+            UpdateCollisionCatFlags();
+            ApplyCollisionCatFlags();
+        }
+
+        protected void changeBuilding(bool newbuilding)
+        {
+            // Check if we need to do anything
+            if (newbuilding == m_building)
+                return;
+
+            if ((bool)newbuilding)
+            {
+                m_building = true;
+                if (!childPrim)
+                    DestroyBody();
+            }
+            else
+            {
+                m_building = false;
+                CheckDelaySelect();
+                if (!childPrim)
+                    MakeBody();
+            }
+            if (!childPrim && childrenPrim.Count > 0)
+            {
+                foreach (OdePrim prm in childrenPrim)
+                    prm.changeBuilding(m_building); // call directly
+            }
+        }
+
+       public void changeSetVehicle(VehicleData vdata)
+        {
+            if (m_vehicle == null)
+                m_vehicle = new ODEDynamics(this);
+            m_vehicle.DoSetVehicle(vdata);
+        }
+
+        private void changeVehicleType(int value)
+        {
+            if (value == (int)Vehicle.TYPE_NONE)
+            {
+                if (m_vehicle != null)
+                    m_vehicle = null;
+            }
+            else
+            {
+                if (m_vehicle == null)
+                    m_vehicle = new ODEDynamics(this);
+
+                m_vehicle.ProcessTypeChange((Vehicle)value);
+            }
+        }
+
+        private void changeVehicleFloatParam(strVehicleFloatParam fp)
+        {
+            if (m_vehicle == null)
+                return;
+
+            m_vehicle.ProcessFloatVehicleParam((Vehicle)fp.param, fp.value);
+        }
+
+        private void changeVehicleVectorParam(strVehicleVectorParam vp)
+        {
+            if (m_vehicle == null)
+                return;
+            m_vehicle.ProcessVectorVehicleParam((Vehicle)vp.param, vp.value);
+        }
+
+        private void changeVehicleRotationParam(strVehicleQuatParam qp)
+        {
+            if (m_vehicle == null)
+                return;
+            m_vehicle.ProcessRotationVehicleParam((Vehicle)qp.param, qp.value);
+        }
+
+        private void changeVehicleFlags(strVehicleBoolParam bp)
+        {
+            if (m_vehicle == null)
+                return;
+            m_vehicle.ProcessVehicleFlags(bp.param, bp.value);
+        }
+
+        private void changeBuoyancy(float b)
+        {
+            m_buoyancy = b;
+        }
+
+        private void changePIDTarget(Vector3 trg)
+        {
+            m_PIDTarget = trg;
+        }
+
+        private void changePIDTau(float tau)
+        {
+            m_PIDTau = tau;
+        }
+
+        private void changePIDActive(bool val)
+        {
+            m_usePID = val;
+        }
+
+        private void changePIDHoverHeight(float val)
+        {
+          m_PIDHoverHeight = val;
+          if (val == 0)
+            m_useHoverPID = false;
+        }
+
+        private void changePIDHoverType(PIDHoverType type)
+        {
+            m_PIDHoverType = type;
+        }
+
+        private void changePIDHoverTau(float tau)
+        {
+            m_PIDHoverTau = tau;
+        }
+
+        private void changePIDHoverActive(bool active)
+        {
+            m_useHoverPID = active;
+        }
+
+        private void changeInertia(PhysicsInertiaData inertia)
+        {
+            m_InertiaOverride = inertia;
+
+            if (Body != IntPtr.Zero)
+                DestroyBody();
+            MakeBody();
+        }
+
+        #endregion
+
+        public void Move()
+        {
+            if (!childPrim && m_isphysical && Body != IntPtr.Zero &&
+                !m_disabled && !m_isSelected && !m_building && !m_outbounds)
+            {
+                if (!d.BodyIsEnabled(Body))
+                {
+                    // let vehicles sleep
+                    if (m_vehicle != null && m_vehicle.Type != Vehicle.TYPE_NONE)
+                        return;
+
+                    if (++m_bodydisablecontrol < 50)
+                        return;
+
+                    // clear residuals
+                    d.BodySetAngularVel(Body,0f,0f,0f);
+                    d.BodySetLinearVel(Body,0f,0f,0f);
+                    _zeroFlag = true;
+                    d.BodySetAutoDisableSteps(Body, 1);
+                    d.BodyEnable(Body);
+                    m_bodydisablecontrol = -3;
+                }
+
+                if(m_bodydisablecontrol < 0)
+                    m_bodydisablecontrol++;
+
+                d.Vector3 lpos = d.GeomGetPosition(prim_geom); // root position that is seem by rest of simulator
+
+                if (m_vehicle != null && m_vehicle.Type != Vehicle.TYPE_NONE)
+                {
+                    // 'VEHICLES' are dealt with in ODEDynamics.cs
+                    m_vehicle.Step();
+                    return;
+                }
+
+                float fx = 0;
+                float fy = 0;
+                float fz = 0;
+
+                float mass = m_mass;
+
+                if (m_usePID && m_PIDTau > 0)
+                {
+                    // for now position error
+                    _target_velocity =
+                        new Vector3(
+                            (m_PIDTarget.X - lpos.X),
+                            (m_PIDTarget.Y - lpos.Y),
+                            (m_PIDTarget.Z - lpos.Z)
+                            );
+
+                    if (_target_velocity.ApproxEquals(Vector3.Zero, 0.02f))
+                    {
+                        d.BodySetPosition(Body, m_PIDTarget.X, m_PIDTarget.Y, m_PIDTarget.Z);
+                        d.BodySetLinearVel(Body, 0, 0, 0);
+                        return;
+                    }
+                    else
+                    {
+                        _zeroFlag = false;
+
+                        float tmp = 1 / m_PIDTau;
+                        _target_velocity *= tmp;
+
+                        // apply limits
+                        tmp = _target_velocity.Length();
+                        if (tmp > 50.0f)
+                        {
+                            tmp = 50 / tmp;
+                            _target_velocity *= tmp;
+                        }
+                        else if (tmp < 0.05f)
+                        {
+                            tmp = 0.05f / tmp;
+                            _target_velocity *= tmp;
+                        }
+
+                        d.Vector3 vel = d.BodyGetLinearVel(Body);
+                        fx = (_target_velocity.X - vel.X) * m_invTimeStep;
+                        fy = (_target_velocity.Y - vel.Y) * m_invTimeStep;
+                        fz = (_target_velocity.Z - vel.Z) * m_invTimeStep;
+//                        d.BodySetLinearVel(Body, _target_velocity.X, _target_velocity.Y, _target_velocity.Z);
+                    }
+                }        // end if (m_usePID)
+
+                // Hover PID Controller needs to be mutually exlusive to MoveTo PID controller
+                else if (m_useHoverPID && m_PIDHoverTau != 0 && m_PIDHoverHeight != 0)
+                {
+
+                    //    Non-Vehicles have a limited set of Hover options.
+                    // determine what our target height really is based on HoverType
+
+                    m_groundHeight = _parent_scene.GetTerrainHeightAtXY(lpos.X, lpos.Y);
+
+                    switch (m_PIDHoverType)
+                    {
+                        case PIDHoverType.Ground:
+                            m_targetHoverHeight = m_groundHeight + m_PIDHoverHeight;
+                            break;
+
+                        case PIDHoverType.GroundAndWater:
+                            m_waterHeight = _parent_scene.GetWaterLevel();
+                            if (m_groundHeight > m_waterHeight)
+                                m_targetHoverHeight = m_groundHeight + m_PIDHoverHeight;
+                            else
+                                m_targetHoverHeight = m_waterHeight + m_PIDHoverHeight;
+                            break;
+                    }     // end switch (m_PIDHoverType)
+
+                    // don't go underground unless volumedetector
+
+                    if (m_targetHoverHeight > m_groundHeight || m_isVolumeDetect)
+                    {
+                        d.Vector3 vel = d.BodyGetLinearVel(Body);
+
+                        fz = (m_targetHoverHeight - lpos.Z);
+
+                        //  if error is zero, use position control; otherwise, velocity control
+                        if (Math.Abs(fz) < 0.01f)
+                        {
+                            d.BodySetPosition(Body, lpos.X, lpos.Y, m_targetHoverHeight);
+                            d.BodySetLinearVel(Body, vel.X, vel.Y, 0);
+                        }
+                        else
+                        {
+                            _zeroFlag = false;
+                            fz /= m_PIDHoverTau;
+
+                            float tmp = Math.Abs(fz);
+                            if (tmp > 50)
+                                fz = 50 * Math.Sign(fz);
+                            else if (tmp < 0.1)
+                                fz = 0.1f * Math.Sign(fz);
+
+                            fz = ((fz - vel.Z) * m_invTimeStep);
+                        }
+                    }
+                }
+                else
+                {
+                    float b = (1.0f - m_buoyancy) * m_gravmod;
+                    fx = _parent_scene.gravityx * b;
+                    fy = _parent_scene.gravityy * b;
+                    fz = _parent_scene.gravityz * b;
+                }
+
+                fx *= mass;
+                fy *= mass;
+                fz *= mass;
+
+                // constant force
+                fx += m_force.X;
+                fy += m_force.Y;
+                fz += m_force.Z;
+
+                fx += m_forceacc.X;
+                fy += m_forceacc.Y;
+                fz += m_forceacc.Z;
+
+                m_forceacc = Vector3.Zero;
+
+                //m_log.Info("[OBJPID]: X:" + fx.ToString() + " Y:" + fy.ToString() + " Z:" + fz.ToString());
+                if (fx != 0 || fy != 0 || fz != 0)
+                {
+                    d.BodyAddForce(Body, fx, fy, fz);
+                    //Console.WriteLine("AddForce " + fx + "," + fy + "," + fz);
+                }
+
+                Vector3 trq;
+
+                trq = m_torque;
+                trq += m_angularForceacc;
+                m_angularForceacc = Vector3.Zero;
+                if (trq.X != 0 || trq.Y != 0 || trq.Z != 0)
+                {
+                    d.BodyAddTorque(Body, trq.X, trq.Y, trq.Z);
+                }
+            }
+            else
+            {    // is not physical, or is not a body or is selected
+                //  _zeroPosition = d.BodyGetPosition(Body);
+                return;
+                //Console.WriteLine("Nothing " +  Name);
+
+            }
+        }
+
+        public void UpdatePositionAndVelocity(int frame)
+        {
+            if (_parent == null && !m_isSelected && !m_disabled && !m_building && !m_outbounds && Body != IntPtr.Zero)
+            {
+                if(m_bodydisablecontrol < 0)
+                    return;
+
+                bool bodyenabled = d.BodyIsEnabled(Body);
+                if (bodyenabled || !_zeroFlag)
+                {
+                    bool lastZeroFlag = _zeroFlag;
+
+                    d.Vector3 lpos = d.GeomGetPosition(prim_geom);
+
+                    // check outside region
+                    if (lpos.Z < -100 || lpos.Z > 100000f)
+                    {
+                        m_outbounds = true;
+
+                        lpos.Z = Util.Clip(lpos.Z, -100f, 100000f);
+                        m_acceleration.X = 0;
+                        m_acceleration.Y = 0;
+                        m_acceleration.Z = 0;
+
+                        _velocity.X = 0;
+                        _velocity.Y = 0;
+                        _velocity.Z = 0;
+                        m_rotationalVelocity.X = 0;
+                        m_rotationalVelocity.Y = 0;
+                        m_rotationalVelocity.Z = 0;
+
+                        d.BodySetLinearVel(Body, 0, 0, 0); // stop it
+                        d.BodySetAngularVel(Body, 0, 0, 0); // stop it
+                        d.BodySetPosition(Body, lpos.X, lpos.Y, lpos.Z); // put it somewhere
+                        m_lastposition = _position;
+                        m_lastorientation = _orientation;
+
+                        base.RequestPhysicsterseUpdate();
+
+//                        throttleCounter = 0;
+                        _zeroFlag = true;
+
+                        disableBodySoft(); // disable it and colisions
+                        base.RaiseOutOfBounds(_position);
+                        return;
+                    }
+
+                    if (lpos.X < 0f)
+                    {
+                        _position.X = Util.Clip(lpos.X, -2f, -0.1f);
+                        m_outbounds = true;
+                    }
+                    else if (lpos.X > _parent_scene.WorldExtents.X)
+                    {
+                        _position.X = Util.Clip(lpos.X, _parent_scene.WorldExtents.X + 0.1f, _parent_scene.WorldExtents.X + 2f);
+                        m_outbounds = true;
+                    }
+                    if (lpos.Y < 0f)
+                    {
+                        _position.Y = Util.Clip(lpos.Y, -2f, -0.1f);
+                        m_outbounds = true;
+                    }
+                    else if (lpos.Y > _parent_scene.WorldExtents.Y)
+                    {
+                        _position.Y = Util.Clip(lpos.Y, _parent_scene.WorldExtents.Y + 0.1f, _parent_scene.WorldExtents.Y + 2f);
+                        m_outbounds = true;
+                    }
+
+                    if (m_outbounds)
+                    {
+                        m_lastposition = _position;
+                        m_lastorientation = _orientation;
+
+                        d.Vector3 dtmp = d.BodyGetAngularVel(Body);
+                        m_rotationalVelocity.X = dtmp.X;
+                        m_rotationalVelocity.Y = dtmp.Y;
+                        m_rotationalVelocity.Z = dtmp.Z;
+
+                        dtmp = d.BodyGetLinearVel(Body);
+                        _velocity.X = dtmp.X;
+                        _velocity.Y = dtmp.Y;
+                        _velocity.Z = dtmp.Z;
+
+                        d.BodySetLinearVel(Body, 0, 0, 0); // stop it
+                        d.BodySetAngularVel(Body, 0, 0, 0);
+                        d.GeomSetPosition(prim_geom, _position.X, _position.Y, _position.Z);
+                        disableBodySoft(); // stop collisions
+                        UnSubscribeEvents();
+
+                        base.RequestPhysicsterseUpdate();
+                        return;
+                    }
+
+                    d.Quaternion ori;
+                    d.GeomCopyQuaternion(prim_geom, out ori);
+
+                    // decide if moving
+                    // use positions since this are integrated quantities
+                    // tolerance values depende a lot on simulation noise...
+                    // use simple math.abs since we dont need to be exact
+                    if(!bodyenabled)
+                    {
+                        _zeroFlag = true;
+                    }
+                    else
+                    {
+                        float poserror;
+                        float angerror;
+                        if(_zeroFlag)
+                        {
+                            poserror = 0.01f;
+                            angerror = 0.001f;
+                        }
+                        else
+                        {
+                            poserror = 0.005f;
+                            angerror = 0.0005f;
+                        }
+
+                        if (
+                            (Math.Abs(_position.X - lpos.X) < poserror)
+                            && (Math.Abs(_position.Y - lpos.Y) < poserror)
+                            && (Math.Abs(_position.Z - lpos.Z) < poserror)
+                            && (Math.Abs(_orientation.X - ori.X) < angerror)
+                            && (Math.Abs(_orientation.Y - ori.Y) < angerror)
+                            && (Math.Abs(_orientation.Z - ori.Z) < angerror)  // ignore W
+                            )
+                            _zeroFlag = true;
+                        else
+                            _zeroFlag = false;
+                    }
+
+                    // update position
+                    if (!(_zeroFlag && lastZeroFlag))
+                    {
+                        _position.X = lpos.X;
+                        _position.Y = lpos.Y;
+                        _position.Z = lpos.Z;
+
+                        _orientation.X = ori.X;
+                        _orientation.Y = ori.Y;
+                        _orientation.Z = ori.Z;
+                        _orientation.W = ori.W;
+                    }
+
+                    // update velocities and acceleration
+                    if (_zeroFlag || lastZeroFlag)
+                    {
+                         // disable interpolators
+                        _velocity = Vector3.Zero;
+                        m_acceleration = Vector3.Zero;
+                        m_rotationalVelocity = Vector3.Zero;
+                    }
+                    else
+                    {
+                        d.Vector3 vel = d.BodyGetLinearVel(Body);
+
+                        m_acceleration = _velocity;
+
+                        if ((Math.Abs(vel.X) < 0.005f) &&
+                            (Math.Abs(vel.Y) < 0.005f) &&
+                            (Math.Abs(vel.Z) < 0.005f))
+                        {
+                            _velocity = Vector3.Zero;
+                            float t = -m_invTimeStep;
+                            m_acceleration = m_acceleration * t;
+                        }
+                        else
+                        {
+                            _velocity.X = vel.X;
+                            _velocity.Y = vel.Y;
+                            _velocity.Z = vel.Z;
+                            m_acceleration = (_velocity - m_acceleration) * m_invTimeStep;
+                        }
+
+                        if ((Math.Abs(m_acceleration.X) < 0.01f) &&
+                            (Math.Abs(m_acceleration.Y) < 0.01f) &&
+                            (Math.Abs(m_acceleration.Z) < 0.01f))
+                        {
+                            m_acceleration = Vector3.Zero;
+                        }
+
+                        vel = d.BodyGetAngularVel(Body);
+                        if ((Math.Abs(vel.X) < 0.0001) &&
+                            (Math.Abs(vel.Y) < 0.0001) &&
+                            (Math.Abs(vel.Z) < 0.0001)
+                            )
+                        {
+                            m_rotationalVelocity = Vector3.Zero;
+                        }
+                        else
+                        {
+                            m_rotationalVelocity.X = vel.X;
+                            m_rotationalVelocity.Y = vel.Y;
+                            m_rotationalVelocity.Z = vel.Z;
+                        }
+                    }
+
+                    if (_zeroFlag)
+                    {
+                        if (!m_lastUpdateSent)
+                        {
+                            base.RequestPhysicsterseUpdate();
+                            if (lastZeroFlag)
+                                m_lastUpdateSent = true;
+                        }
+                        return;
+                    }
+
+                    base.RequestPhysicsterseUpdate();
+                    m_lastUpdateSent = false;
+                }
+            }
+        }
+
+        internal static bool QuaternionIsFinite(Quaternion q)
+        {
+            if (Single.IsNaN(q.X) || Single.IsInfinity(q.X))
+                return false;
+            if (Single.IsNaN(q.Y) || Single.IsInfinity(q.Y))
+                return false;
+            if (Single.IsNaN(q.Z) || Single.IsInfinity(q.Z))
+                return false;
+            if (Single.IsNaN(q.W) || Single.IsInfinity(q.W))
+                return false;
+            return true;
+        }
+
+        internal static void DMassSubPartFromObj(ref d.Mass part, ref d.Mass theobj)
+        {
+            // assumes object center of mass is zero
+            float smass = part.mass;
+            theobj.mass -= smass;
+
+            smass *= 1.0f / (theobj.mass); ;
+
+            theobj.c.X -= part.c.X * smass;
+            theobj.c.Y -= part.c.Y * smass;
+            theobj.c.Z -= part.c.Z * smass;
+
+            theobj.I.M00 -= part.I.M00;
+            theobj.I.M01 -= part.I.M01;
+            theobj.I.M02 -= part.I.M02;
+            theobj.I.M10 -= part.I.M10;
+            theobj.I.M11 -= part.I.M11;
+            theobj.I.M12 -= part.I.M12;
+            theobj.I.M20 -= part.I.M20;
+            theobj.I.M21 -= part.I.M21;
+            theobj.I.M22 -= part.I.M22;
+        }
+
+        private void donullchange()
+        {
+        }
+
+        public bool DoAChange(changes what, object arg)
+        {
+            if (prim_geom == IntPtr.Zero && what != changes.Add && what != changes.AddPhysRep && what != changes.Remove)
+            {
+                return false;
+            }
+
+            // nasty switch
+            switch (what)
+            {
+                case changes.Add:
+                    changeadd();
+                    break;
+
+                case changes.AddPhysRep:
+                    changeAddPhysRep((ODEPhysRepData)arg);
+                    break;
+
+                case changes.Remove:
+                    //If its being removed, we don't want to rebuild the physical rep at all, so ignore this stuff...
+                    //When we return true, it destroys all of the prims in the linkset anyway
+                    if (_parent != null)
+                    {
+                        OdePrim parent = (OdePrim)_parent;
+                        parent.ChildRemove(this, false);
+                    }
+                    else
+                        ChildRemove(this, false);
+
+                    m_vehicle = null;
+                    RemoveGeom();
+                    m_targetSpace = IntPtr.Zero;
+                    UnSubscribeEvents();
+                    return true;
+
+                case changes.Link:
+                    OdePrim tmp = (OdePrim)arg;
+                    changeLink(tmp);
+                    break;
+
+                case changes.DeLink:
+                    changeLink(null);
+                    break;
+
+                case changes.Position:
+                    changePosition((Vector3)arg);
+                    break;
+
+                case changes.Orientation:
+                    changeOrientation((Quaternion)arg);
+                    break;
+
+                case changes.PosOffset:
+                    donullchange();
+                    break;
+
+                case changes.OriOffset:
+                    donullchange();
+                    break;
+
+                case changes.Velocity:
+                    changevelocity((Vector3)arg);
+                    break;
+
+                case changes.TargetVelocity:
+                    break;
+
+//                case changes.Acceleration:
+//                    changeacceleration((Vector3)arg);
+//                    break;
+
+                case changes.AngVelocity:
+                    changeangvelocity((Vector3)arg);
+                    break;
+
+                case changes.Force:
+                    changeForce((Vector3)arg);
+                    break;
+
+                case changes.Torque:
+                    changeSetTorque((Vector3)arg);
+                    break;
+
+                case changes.AddForce:
+                    changeAddForce((Vector3)arg);
+                    break;
+
+                case changes.AddAngForce:
+                    changeAddAngularImpulse((Vector3)arg);
+                    break;
+
+                case changes.AngLock:
+                    changeAngularLock((byte)arg);
+                    break;
+
+                case changes.Size:
+                    changeSize((Vector3)arg);
+                    break;
+
+                case changes.Shape:
+                    changeShape((PrimitiveBaseShape)arg);
+                    break;
+
+                case changes.PhysRepData:
+                    changePhysRepData((ODEPhysRepData) arg);
+                    break;
+
+                case changes.CollidesWater:
+                    changeFloatOnWater((bool)arg);
+                    break;
+
+                case changes.VolumeDtc:
+                    changeVolumedetetion((bool)arg);
+                    break;
+
+                case changes.Phantom:
+                    changePhantomStatus((bool)arg);
+                    break;
+
+                case changes.Physical:
+                    changePhysicsStatus((bool)arg);
+                    break;
+
+                case changes.Selected:
+                    changeSelectedStatus((bool)arg);
+                    break;
+
+                case changes.disabled:
+                    changeDisable((bool)arg);
+                    break;
+
+                case changes.building:
+                    changeBuilding((bool)arg);
+                    break;
+
+                case changes.VehicleType:
+                    changeVehicleType((int)arg);
+                    break;
+
+                case changes.VehicleFlags:
+                    changeVehicleFlags((strVehicleBoolParam) arg);
+                    break;
+
+                case changes.VehicleFloatParam:
+                    changeVehicleFloatParam((strVehicleFloatParam) arg);
+                    break;
+
+                case changes.VehicleVectorParam:
+                    changeVehicleVectorParam((strVehicleVectorParam) arg);
+                    break;
+
+                case changes.VehicleRotationParam:
+                    changeVehicleRotationParam((strVehicleQuatParam) arg);
+                    break;
+
+                case changes.SetVehicle:
+                    changeSetVehicle((VehicleData) arg);
+                    break;
+
+                case changes.Buoyancy:
+                    changeBuoyancy((float)arg);
+                    break;
+
+                case changes.PIDTarget:
+                    changePIDTarget((Vector3)arg);
+                    break;
+
+                case changes.PIDTau:
+                    changePIDTau((float)arg);
+                    break;
+
+                case changes.PIDActive:
+                    changePIDActive((bool)arg);
+                    break;
+
+                case changes.PIDHoverHeight:
+                    changePIDHoverHeight((float)arg);
+                    break;
+
+                case changes.PIDHoverType:
+                    changePIDHoverType((PIDHoverType)arg);
+                    break;
+
+                case changes.PIDHoverTau:
+                    changePIDHoverTau((float)arg);
+                    break;
+
+                case changes.PIDHoverActive:
+                    changePIDHoverActive((bool)arg);
+                    break;
+
+                case changes.SetInertia:
+                    changeInertia((PhysicsInertiaData) arg);
+                    break;
+
+                case changes.Null:
+                    donullchange();
+                    break;
+
+                default:
+                    donullchange();
+                    break;
+            }
+            return false;
+        }
+
+        public void AddChange(changes what, object arg)
+        {
+            _parent_scene.AddChange((PhysicsActor) this, what, arg);
+        }
+
+        private struct strVehicleBoolParam
+        {
+            public int param;
+            public bool value;
+        }
+
+        private struct strVehicleFloatParam
+        {
+            public int param;
+            public float value;
+        }
+
+        private struct strVehicleQuatParam
+        {
+            public int param;
+            public Quaternion value;
+        }
+
+        private struct strVehicleVectorParam
+        {
+            public int param;
+            public Vector3 value;
+        }
+    }
+}