Merge branch 'SledjChisl'

1 files changed, 2036 insertions, 0 deletions

diff --git a/OpenSim/Region/PhysicsModules/ubOde/ODECharacter.cs b/OpenSim/Region/PhysicsModules/ubOde/ODECharacter.cs
new file mode 100644
index 0000000..0e46471
--- /dev/null
+++ b/OpenSim/Region/PhysicsModules/ubOde/ODECharacter.cs
@@ -0,0 +1,2036 @@
+/*
+ * 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.
+ */
+
+
+// Revision by Ubit 2011/12
+
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+using OpenMetaverse;
+using OdeAPI;
+using OpenSim.Framework;
+using OpenSim.Region.PhysicsModules.SharedBase;
+using log4net;
+
+namespace OpenSim.Region.PhysicsModule.ubOde
+{
+    /// <summary>
+    /// Various properties that ODE uses for AMotors but isn't exposed in ODE.NET so we must define them ourselves.
+    /// </summary>
+
+    public enum dParam : int
+    {
+        LowStop = 0,
+        HiStop = 1,
+        Vel = 2,
+        FMax = 3,
+        FudgeFactor = 4,
+        Bounce = 5,
+        CFM = 6,
+        StopERP = 7,
+        StopCFM = 8,
+        LoStop2 = 256,
+        HiStop2 = 257,
+        Vel2 = 258,
+        FMax2 = 259,
+        StopERP2 = 7 + 256,
+        StopCFM2 = 8 + 256,
+        LoStop3 = 512,
+        HiStop3 = 513,
+        Vel3 = 514,
+        FMax3 = 515,
+        StopERP3 = 7 + 512,
+        StopCFM3 = 8 + 512
+    }
+
+    public class OdeCharacter : PhysicsActor
+    {
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        private Vector3 _position;
+        private Vector3 _zeroPosition;
+        private Vector3 _velocity;
+        private Vector3 _target_velocity;
+        private Vector3 _acceleration;
+        private Vector3 m_rotationalVelocity;
+        private Vector3 m_size;
+        private Vector3 m_collideNormal;
+        private Vector3 m_lastFallVel;
+        private Quaternion m_orientation;
+        private Quaternion m_orientation2D;
+        private float m_mass = 80f;
+        public float m_density = 60f;
+        private bool m_pidControllerActive = true;
+
+        const float basePID_D = 0.55f; // scaled for unit mass unit time (2200 /(50*80))
+        const float basePID_P = 0.225f; // scaled for unit mass unit time (900 /(50*80))
+        public float PID_D;
+        public float PID_P;
+
+        private float timeStep;
+        private float invtimeStep;
+
+        private float m_feetOffset = 0;
+        private float feetOff = 0;
+        private float boneOff = 0;
+        private float AvaAvaSizeXsq = 0.3f;
+        private float AvaAvaSizeYsq = 0.2f;
+
+        public float walkDivisor = 1.3f;
+        public float runDivisor = 0.8f;
+        private bool m_flying = false;
+        private bool m_iscolliding = false;
+        private bool m_iscollidingGround = false;
+        private bool m_iscollidingObj = false;
+        private bool m_alwaysRun = false;
+
+        private bool _zeroFlag = false;
+        private bool m_haveLastFallVel = false;
+
+        private uint m_localID = 0;
+        public bool m_returnCollisions = false;
+        // taints and their non-tainted counterparts
+        public bool m_isPhysical = false; // the current physical status
+        public float MinimumGroundFlightOffset = 3f;
+
+        private float m_buoyancy = 0f;
+
+        private bool m_freemove = false;
+
+//        private string m_name = String.Empty;
+        // other filter control
+        int m_colliderfilter = 0;
+        int m_colliderGroundfilter = 0;
+        int m_colliderObjectfilter = 0;
+
+        // Default we're a Character
+        private CollisionCategories m_collisionCategories = (CollisionCategories.Character);
+
+        // Default, Collide with Other Geometries, spaces, bodies and characters.
+        private CollisionCategories m_collisionFlags = (CollisionCategories.Character
+                                                        | CollisionCategories.Geom
+                                                        | CollisionCategories.VolumeDtc
+                                                        );
+        // we do land collisions not ode                | CollisionCategories.Land);
+        public IntPtr Body = IntPtr.Zero;
+        private ODEScene m_parent_scene;
+        private IntPtr capsule = IntPtr.Zero;
+        public IntPtr collider = IntPtr.Zero;
+
+        public IntPtr Amotor = IntPtr.Zero;
+
+        public d.Mass ShellMass;
+
+        public int m_eventsubscription = 0;
+        private int m_cureventsubscription = 0;
+        private CollisionEventUpdate CollisionEventsThisFrame = new CollisionEventUpdate();
+        private bool SentEmptyCollisionsEvent;
+
+        // unique UUID of this character object
+        public UUID m_uuid;
+        public bool bad = false;
+
+        float mu;
+
+        // HoverHeight control
+        private float m_PIDHoverHeight;
+        private float m_PIDHoverTau;
+        private bool m_useHoverPID;
+        private PIDHoverType m_PIDHoverType;
+        private float m_targetHoverHeight;
+
+
+        public OdeCharacter(uint localID, String avName, ODEScene parent_scene, Vector3 pos, Vector3 pSize, float pfeetOffset, float density, float walk_divisor, float rundivisor)
+        {
+            m_uuid = UUID.Random();
+            m_localID = localID;
+            m_parent_scene = parent_scene;
+
+            timeStep = parent_scene.ODE_STEPSIZE;
+            invtimeStep = 1 / timeStep;
+
+            if (pos.IsFinite())
+            {
+                if (pos.Z > 99999f)
+                {
+                    pos.Z = parent_scene.GetTerrainHeightAtXY(127, 127) + 5;
+                }
+                if (pos.Z < -100f) // shouldn't this be 0 ?
+                {
+                    pos.Z = parent_scene.GetTerrainHeightAtXY(127, 127) + 5;
+                }
+                _position = pos;
+            }
+            else
+            {
+                _position = new Vector3(((float)m_parent_scene.WorldExtents.X * 0.5f), ((float)m_parent_scene.WorldExtents.Y * 0.5f), parent_scene.GetTerrainHeightAtXY(128f, 128f) + 10f);
+                m_log.Warn("[PHYSICS]: Got NaN Position on Character Create");
+            }
+
+            m_size.X = pSize.X;
+            m_size.Y = pSize.Y;
+            m_size.Z = pSize.Z;
+
+            if(m_size.X <0.01f)
+                m_size.X = 0.01f;
+            if(m_size.Y <0.01f)
+                m_size.Y = 0.01f;
+            if(m_size.Z <0.01f)
+                m_size.Z = 0.01f;
+
+            m_feetOffset = pfeetOffset;
+            m_orientation = Quaternion.Identity;
+            m_orientation2D = Quaternion.Identity;
+            m_density = density;
+
+            // force lower density for testing
+            m_density = 3.0f;
+
+            mu = m_parent_scene.AvatarFriction;
+
+            walkDivisor = walk_divisor;
+            runDivisor = rundivisor;
+
+            m_mass = m_density * m_size.X * m_size.Y * m_size.Z; ; // sure we have a default
+
+            PID_D = basePID_D * m_mass * invtimeStep;
+            PID_P = basePID_P * m_mass * invtimeStep;
+
+            m_isPhysical = false; // current status: no ODE information exists
+
+            Name = avName;
+
+            AddChange(changes.Add, null);
+        }
+
+        public override int PhysicsActorType
+        {
+            get { return (int)ActorTypes.Agent; }
+            set { return; }
+        }
+
+        public override void getContactData(ref ContactData cdata)
+        {
+            cdata.mu = mu;
+            cdata.bounce = 0;
+            cdata.softcolide = false;
+        }
+
+        public override bool Building { get; set; }
+
+        /// <summary>
+        /// If this is set, the avatar will move faster
+        /// </summary>
+        public override bool SetAlwaysRun
+        {
+            get { return m_alwaysRun; }
+            set { m_alwaysRun = value; }
+        }
+
+        public override uint LocalID
+        {
+            get { return m_localID; }
+            set { m_localID = value; }
+        }
+
+        public override PhysicsActor ParentActor
+        {
+            get { return (PhysicsActor)this; }
+        }
+
+        public override bool Grabbed
+        {
+            set { return; }
+        }
+
+        public override bool Selected
+        {
+            set { return; }
+        }
+
+        public override float Buoyancy
+        {
+            get { return m_buoyancy; }
+            set { m_buoyancy = value; }
+        }
+
+        public override bool FloatOnWater
+        {
+            set { return; }
+        }
+
+        public override bool IsPhysical
+        {
+            get { return m_isPhysical; }
+            set { return; }
+        }
+
+        public override bool ThrottleUpdates
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override bool Flying
+        {
+            get { return m_flying; }
+            set
+            {
+                m_flying = value;
+//                m_log.DebugFormat("[PHYSICS]: Set OdeCharacter Flying to {0}", flying);
+            }
+        }
+
+        /// <summary>
+        /// Returns if the avatar is colliding in general.
+        /// This includes the ground and objects and avatar.
+        /// </summary>
+        public override bool IsColliding
+        {
+            get { return (m_iscolliding || m_iscollidingGround); }
+            set
+            {
+                if (value)
+                {
+                    m_colliderfilter += 3;
+                    if (m_colliderfilter > 3)
+                        m_colliderfilter = 3;
+                }
+                else
+                {
+                    m_colliderfilter--;
+                    if (m_colliderfilter < 0)
+                        m_colliderfilter = 0;
+                }
+
+                if (m_colliderfilter == 0)
+                    m_iscolliding = false;
+                else
+                {
+                    m_pidControllerActive = true;
+                    m_iscolliding = true;
+                    m_freemove = false;
+                }
+            }
+        }
+
+        /// <summary>
+        /// Returns if an avatar is colliding with the ground
+        /// </summary>
+        public override bool CollidingGround
+        {
+            get { return m_iscollidingGround; }
+            set
+            {
+/*  we now control this
+                if (value)
+                    {
+                    m_colliderGroundfilter += 2;
+                    if (m_colliderGroundfilter > 2)
+                        m_colliderGroundfilter = 2;
+                    }
+                else
+                    {
+                    m_colliderGroundfilter--;
+                    if (m_colliderGroundfilter < 0)
+                        m_colliderGroundfilter = 0;
+                    }
+
+                if (m_colliderGroundfilter == 0)
+                    m_iscollidingGround = false;
+                else
+                    m_iscollidingGround = true;
+ */
+            }
+
+        }
+
+        /// <summary>
+        /// Returns if the avatar is colliding with an object
+        /// </summary>
+        public override bool CollidingObj
+        {
+            get { return m_iscollidingObj; }
+            set
+            {
+                // Ubit filter this also
+                if (value)
+                {
+                    m_colliderObjectfilter += 2;
+                    if (m_colliderObjectfilter > 2)
+                        m_colliderObjectfilter = 2;
+                }
+                else
+                {
+                    m_colliderObjectfilter--;
+                    if (m_colliderObjectfilter < 0)
+                        m_colliderObjectfilter = 0;
+                }
+
+                if (m_colliderObjectfilter == 0)
+                    m_iscollidingObj = false;
+                else
+                    m_iscollidingObj = true;
+
+//            m_iscollidingObj = value;
+
+                if (m_iscollidingObj)
+                    m_pidControllerActive = false;
+                else
+                    m_pidControllerActive = true;
+            }
+        }
+
+        /// <summary>
+        /// turn the PID controller on or off.
+        /// The PID Controller will turn on all by itself in many situations
+        /// </summary>
+        /// <param name="status"></param>
+        public void SetPidStatus(bool status)
+        {
+            m_pidControllerActive = status;
+        }
+
+        public override bool Stopped
+        {
+            get { return _zeroFlag; }
+        }
+
+        /// <summary>
+        /// This 'puts' an avatar somewhere in the physics space.
+        /// Not really a good choice unless you 'know' it's a good
+        /// spot otherwise you're likely to orbit the avatar.
+        /// </summary>
+        public override Vector3 Position
+        {
+            get { return _position; }
+            set
+            {
+                if (value.IsFinite())
+                {
+                    if (value.Z > 9999999f)
+                    {
+                        value.Z = m_parent_scene.GetTerrainHeightAtXY(127, 127) + 5;
+                    }
+                    if (value.Z < -100f)
+                    {
+                        value.Z = m_parent_scene.GetTerrainHeightAtXY(127, 127) + 5;
+                    }
+                    AddChange(changes.Position, value);
+                }
+                else
+                {
+                    m_log.Warn("[PHYSICS]: Got a NaN Position from Scene on a Character");
+                }
+            }
+        }
+
+        public override Vector3 RotationalVelocity
+        {
+            get { return m_rotationalVelocity; }
+            set { m_rotationalVelocity = value; }
+        }
+
+        /// <summary>
+        /// This property sets the height of the avatar only.  We use the height to make sure the avatar stands up straight
+        /// and use it to offset landings properly
+        /// </summary>
+        public override Vector3 Size
+        {
+            get
+            {
+                return m_size;
+            }
+            set
+            {
+                if (value.IsFinite())
+                {
+                    if(value.X <0.01f)
+                        value.X = 0.01f;
+                    if(value.Y <0.01f)
+                        value.Y = 0.01f;
+                    if(value.Z <0.01f)
+                        value.Z = 0.01f;
+
+                    AddChange(changes.Size, value);
+                }
+                else
+                {
+                    m_log.Warn("[PHYSICS]: Got a NaN Size from Scene on a Character");
+                }
+            }
+        }
+
+        public override void setAvatarSize(Vector3 size, float feetOffset)
+        {
+            if (size.IsFinite())
+            {
+                if (size.X < 0.01f)
+                    size.X = 0.01f;
+                if (size.Y < 0.01f)
+                    size.Y = 0.01f;
+                if (size.Z < 0.01f)
+                    size.Z = 0.01f;
+
+                strAvatarSize st = new strAvatarSize();
+                st.size = size;
+                st.offset = feetOffset;
+                AddChange(changes.AvatarSize, st);
+            }
+            else
+            {
+                m_log.Warn("[PHYSICS]: Got a NaN AvatarSize from Scene on a Character");
+            }
+
+        }
+        /// <summary>
+        /// This creates the Avatar's physical Surrogate at the position supplied
+        /// </summary>
+        /// <param name="npositionX"></param>
+        /// <param name="npositionY"></param>
+        /// <param name="npositionZ"></param>
+
+        //
+        /// <summary>
+        /// Uses the capped cyllinder volume formula to calculate the avatar's mass.
+        /// This may be used in calculations in the scene/scenepresence
+        /// </summary>
+        public override float Mass
+        {
+            get
+            {
+                return m_mass;
+            }
+        }
+        public override void link(PhysicsActor obj)
+        {
+
+        }
+
+        public override void delink()
+        {
+
+        }
+
+        public override void LockAngularMotion(byte axislocks)
+        {
+
+        }
+
+
+        public override Vector3 Force
+        {
+            get { return _target_velocity; }
+            set { return; }
+        }
+
+        public override int VehicleType
+        {
+            get { return 0; }
+            set { return; }
+        }
+
+        public override void VehicleFloatParam(int param, float value)
+        {
+
+        }
+
+        public override void VehicleVectorParam(int param, Vector3 value)
+        {
+
+        }
+
+        public override void VehicleRotationParam(int param, Quaternion rotation)
+        {
+
+        }
+
+        public override void VehicleFlags(int param, bool remove)
+        {
+
+        }
+
+        public override void SetVolumeDetect(int param)
+        {
+
+        }
+
+        public override Vector3 CenterOfMass
+        {
+            get
+            {
+                Vector3 pos = _position;
+                return pos;
+            }
+        }
+
+        public override Vector3 GeometricCenter
+        {
+            get
+            {
+                Vector3 pos = _position;
+                return pos;
+            }
+        }
+
+        public override PrimitiveBaseShape Shape
+        {
+            set { return; }
+        }
+
+        public override Vector3 rootVelocity
+        {
+            get
+            {
+                return _velocity;
+            }
+        }
+
+        public override Vector3 Velocity
+        {
+            get
+            {
+                return _velocity;
+            }
+            set
+            {
+                if (value.IsFinite())
+                {
+                    AddChange(changes.Velocity, value);
+                }
+                else
+                {
+                    m_log.Warn("[PHYSICS]: Got a NaN velocity from Scene in a Character");
+                }
+            }
+        }
+
+        public override Vector3 TargetVelocity
+        {
+            get
+            {
+                return m_targetVelocity;
+            }
+            set
+            {
+                if (value.IsFinite())
+                {
+                    AddChange(changes.TargetVelocity, value);
+                }
+                else
+                {
+                    m_log.Warn("[PHYSICS]: Got a NaN velocity from Scene in a Character");
+                }
+            }
+        }
+
+        public override Vector3 Torque
+        {
+            get { return Vector3.Zero; }
+            set { return; }
+        }
+
+        public override float CollisionScore
+        {
+            get { return 0f; }
+            set { }
+        }
+
+        public override bool Kinematic
+        {
+            get { return false; }
+            set { }
+        }
+
+        public override Quaternion Orientation
+        {
+            get { return m_orientation; }
+            set
+            {
+//                fakeori = value;
+//                givefakeori++;
+                value.Normalize();
+                AddChange(changes.Orientation, value);
+            }
+        }
+
+        public override Vector3 Acceleration
+        {
+            get { return _acceleration; }
+            set { }
+        }
+
+        public void SetAcceleration(Vector3 accel)
+        {
+            m_pidControllerActive = true;
+            _acceleration = accel;
+        }
+
+        /// <summary>
+        /// Adds the force supplied to the Target Velocity
+        /// The PID controller takes this target velocity and tries to make it a reality
+        /// </summary>
+        /// <param name="force"></param>
+        public override void AddForce(Vector3 force, bool pushforce)
+        {
+            if (force.IsFinite())
+            {
+                if (pushforce)
+                {
+                    AddChange(changes.Force, force * m_density / (m_parent_scene.ODE_STEPSIZE * 28f));
+                }
+                else
+                {
+                    AddChange(changes.TargetVelocity, force);
+                }
+            }
+            else
+            {
+                m_log.Warn("[PHYSICS]: Got a NaN force applied to a Character");
+            }
+            //m_lastUpdateSent = false;
+        }
+
+        public override void AddAngularForce(Vector3 force, bool pushforce)
+        {
+
+        }
+
+        public override void SetMomentum(Vector3 momentum)
+        {
+            if (momentum.IsFinite())
+                AddChange(changes.Momentum, momentum);
+        }
+
+
+        private void AvatarGeomAndBodyCreation(float npositionX, float npositionY, float npositionZ)
+        {
+            // sizes  one day should came from visual parameters
+            float sx = m_size.X;
+            float sy = m_size.Y;
+            float sz = m_size.Z;
+
+            float bot = -sz * 0.5f + m_feetOffset;
+            boneOff = bot + 0.3f;
+
+            float feetsz = sz * 0.45f;
+            if (feetsz > 0.6f)
+                feetsz = 0.6f;
+
+            feetOff = bot + feetsz;
+
+            AvaAvaSizeXsq = 0.4f * sx;
+            AvaAvaSizeXsq *= AvaAvaSizeXsq;
+            AvaAvaSizeYsq = 0.5f * sy;
+            AvaAvaSizeYsq *= AvaAvaSizeYsq;
+
+            m_parent_scene.waitForSpaceUnlock(m_parent_scene.CharsSpace);
+
+            collider = d.HashSpaceCreate(m_parent_scene.CharsSpace);
+            d.HashSpaceSetLevels(collider, -4, 3);
+            d.SpaceSetSublevel(collider, 3);
+            d.SpaceSetCleanup(collider, false);
+            d.GeomSetCategoryBits(collider, (uint)m_collisionCategories);
+            d.GeomSetCollideBits(collider, (uint)m_collisionFlags);
+
+            float r = m_size.X;
+            if (m_size.Y > r)
+                r = m_size.Y;
+            float l = m_size.Z - r;
+            r *= 0.5f;
+
+            capsule = d.CreateCapsule(collider, r, l);
+
+            m_mass = m_density * m_size.X * m_size.Y * m_size.Z;  // update mass
+
+            d.MassSetBoxTotal(out ShellMass, m_mass, m_size.X, m_size.Y, m_size.Z);
+
+            PID_D = basePID_D * m_mass / m_parent_scene.ODE_STEPSIZE;
+            PID_P = basePID_P * m_mass / m_parent_scene.ODE_STEPSIZE;
+
+            Body = d.BodyCreate(m_parent_scene.world);
+
+            _zeroFlag = false;
+            m_pidControllerActive = true;
+            m_freemove = false;
+
+            _velocity = Vector3.Zero;
+
+            d.BodySetAutoDisableFlag(Body, false);
+            d.BodySetPosition(Body, npositionX, npositionY, npositionZ);
+
+            _position.X = npositionX;
+            _position.Y = npositionY;
+            _position.Z = npositionZ;
+
+            d.BodySetMass(Body, ref ShellMass);
+            d.GeomSetBody(capsule, Body);
+
+            // The purpose of the AMotor here is to keep the avatar's physical
+            // surrogate from rotating while moving
+            Amotor = d.JointCreateAMotor(m_parent_scene.world, IntPtr.Zero);
+            d.JointAttach(Amotor, Body, IntPtr.Zero);
+
+            d.JointSetAMotorMode(Amotor, 0);
+            d.JointSetAMotorNumAxes(Amotor, 3);
+            d.JointSetAMotorAxis(Amotor, 0, 0, 1, 0, 0);
+            d.JointSetAMotorAxis(Amotor, 1, 0, 0, 1, 0);
+            d.JointSetAMotorAxis(Amotor, 2, 0, 0, 0, 1);
+
+            d.JointSetAMotorAngle(Amotor, 0, 0);
+            d.JointSetAMotorAngle(Amotor, 1, 0);
+            d.JointSetAMotorAngle(Amotor, 2, 0);
+
+            d.JointSetAMotorParam(Amotor, (int)dParam.StopCFM, 0f); // make it HARD
+            d.JointSetAMotorParam(Amotor, (int)dParam.StopCFM2, 0f);
+            d.JointSetAMotorParam(Amotor, (int)dParam.StopCFM3, 0f);
+            d.JointSetAMotorParam(Amotor, (int)dParam.StopERP, 0.8f);
+            d.JointSetAMotorParam(Amotor, (int)dParam.StopERP2, 0.8f);
+            d.JointSetAMotorParam(Amotor, (int)dParam.StopERP3, 0.8f);
+
+            // These lowstops and high stops are effectively (no wiggle room)
+            d.JointSetAMotorParam(Amotor, (int)dParam.LowStop, -1e-5f);
+            d.JointSetAMotorParam(Amotor, (int)dParam.HiStop, 1e-5f);
+            d.JointSetAMotorParam(Amotor, (int)dParam.LoStop2, -1e-5f);
+            d.JointSetAMotorParam(Amotor, (int)dParam.HiStop2, 1e-5f);
+            d.JointSetAMotorParam(Amotor, (int)dParam.LoStop3, -1e-5f);
+            d.JointSetAMotorParam(Amotor, (int)dParam.HiStop3, 1e-5f);
+
+            d.JointSetAMotorParam(Amotor, (int)d.JointParam.Vel, 0);
+            d.JointSetAMotorParam(Amotor, (int)d.JointParam.Vel2, 0);
+            d.JointSetAMotorParam(Amotor, (int)d.JointParam.Vel3, 0);
+
+            d.JointSetAMotorParam(Amotor, (int)dParam.FMax, 5e8f);
+            d.JointSetAMotorParam(Amotor, (int)dParam.FMax2, 5e8f);
+            d.JointSetAMotorParam(Amotor, (int)dParam.FMax3, 5e8f);
+        }
+
+        /// <summary>
+        /// Destroys the avatar body and geom
+
+        private void AvatarGeomAndBodyDestroy()
+        {
+            // Kill the Amotor
+            if (Amotor != IntPtr.Zero)
+            {
+                d.JointDestroy(Amotor);
+                Amotor = IntPtr.Zero;
+            }
+
+            if (Body != IntPtr.Zero)
+            {
+                //kill the body
+                d.BodyDestroy(Body);
+                Body = IntPtr.Zero;
+            }
+
+            //kill the Geoms
+            if (capsule != IntPtr.Zero)
+            {
+                m_parent_scene.actor_name_map.Remove(capsule);
+                m_parent_scene.waitForSpaceUnlock(collider);
+                d.GeomDestroy(capsule);
+                capsule = IntPtr.Zero;
+            }
+
+            if (collider != IntPtr.Zero)
+            {
+                d.SpaceDestroy(collider);
+                collider = IntPtr.Zero;
+            }
+
+        }
+
+        //in place 2D rotation around Z assuming rot is normalised and is a rotation around Z
+        public void RotateXYonZ(ref float x, ref float y, ref Quaternion rot)
+        {
+            float sin = 2.0f * rot.Z * rot.W;
+            float cos = rot.W * rot.W - rot.Z * rot.Z;
+            float tx = x;
+
+            x = tx * cos - y * sin;
+            y = tx * sin + y * cos;
+        }
+        public void RotateXYonZ(ref float x, ref float y, ref float sin, ref float cos)
+        {
+            float tx = x;
+            x = tx * cos - y * sin;
+            y = tx * sin + y * cos;
+        }
+        public void invRotateXYonZ(ref float x, ref float y, ref float sin, ref float cos)
+        {
+            float tx = x;
+            x = tx * cos + y * sin;
+            y = -tx * sin + y * cos;
+        }
+
+        public void invRotateXYonZ(ref float x, ref float y, ref Quaternion rot)
+        {
+            float sin = - 2.0f * rot.Z * rot.W;
+            float cos = rot.W * rot.W - rot.Z * rot.Z;
+            float tx = x;
+
+            x = tx * cos - y * sin;
+            y = tx * sin + y * cos;
+        }
+
+            public bool Collide(IntPtr me, IntPtr other, bool reverse, ref d.ContactGeom contact,
+                ref d.ContactGeom altContact , ref bool useAltcontact, ref bool feetcollision)
+            {
+            feetcollision = false;
+            useAltcontact = false;
+
+            if (me == capsule)
+            {
+                Vector3 offset;
+
+                float h = contact.pos.Z - _position.Z;
+                offset.Z = h - feetOff;
+
+                offset.X = contact.pos.X - _position.X;
+                offset.Y = contact.pos.Y - _position.Y;
+
+                d.GeomClassID gtype = d.GeomGetClass(other);
+                if (gtype == d.GeomClassID.CapsuleClass)
+                {
+                    Vector3 roff = offset * Quaternion.Inverse(m_orientation2D);
+                    float r = roff.X *roff.X / AvaAvaSizeXsq;
+                    r += (roff.Y * roff.Y) / AvaAvaSizeYsq;
+                    if (r > 1.0f)
+                        return false;
+
+                    float dp = 1.0f -(float)Math.Sqrt((double)r);
+                    if (dp > 0.05f)
+                        dp = 0.05f;
+
+                    contact.depth = dp;
+
+                    if (offset.Z < 0)
+                    {
+                        feetcollision = true;
+                        if (h < boneOff)
+                        {
+                            m_collideNormal.X = contact.normal.X;
+                            m_collideNormal.Y = contact.normal.Y;
+                            m_collideNormal.Z = contact.normal.Z;
+                            IsColliding = true;
+                        }
+                    }
+                    return true;
+                }
+
+                if (gtype == d.GeomClassID.SphereClass && d.GeomGetBody(other) != IntPtr.Zero)
+                {
+                    if(d.GeomSphereGetRadius(other) < 0.5)
+                        return true;
+                }
+
+                if (offset.Z > 0 || contact.normal.Z > 0.35f)
+                {
+                    if (offset.Z <= 0)
+                    {
+                        feetcollision = true;
+                        if (h < boneOff)
+                        {
+                            m_collideNormal.X = contact.normal.X;
+                            m_collideNormal.Y = contact.normal.Y;
+                            m_collideNormal.Z = contact.normal.Z;
+                            IsColliding = true;
+                        }
+                    }
+                    return true;
+                }
+
+                if(m_flying)
+                    return true;
+
+                feetcollision = true;
+                if (h < boneOff)
+                {
+                    m_collideNormal.X = contact.normal.X;
+                    m_collideNormal.Y = contact.normal.Y;
+                    m_collideNormal.Z = contact.normal.Z;
+                    IsColliding = true;
+                }
+
+                altContact = contact;
+                useAltcontact = true;
+
+                offset.Z -= 0.2f;
+
+                offset.Normalize();
+
+                float tdp = contact.depth;
+                float t = offset.X;
+                t = Math.Abs(t);
+                if(t > 1e-6)
+                {
+                   tdp /= t;
+                   tdp *= contact.normal.X;
+                }
+                else
+                    tdp *= 10;
+
+                if (tdp > 0.25f)
+                    tdp = 0.25f;
+
+                altContact.depth = tdp;
+
+                if (reverse)
+                {
+                    altContact.normal.X = offset.X;
+                    altContact.normal.Y = offset.Y;
+                    altContact.normal.Z = offset.Z;
+                }
+                else
+                {
+                    altContact.normal.X = -offset.X;
+                    altContact.normal.Y = -offset.Y;
+                    altContact.normal.Z = -offset.Z;
+                }
+                return true;
+            }
+            return false;
+        }
+
+        /// <summary>
+        /// Called from Simulate
+        /// This is the avatar's movement control + PID Controller
+        /// </summary>
+        /// <param name="timeStep"></param>
+        public void Move(List<OdeCharacter> defects)
+        {
+            if (Body == IntPtr.Zero)
+                return;
+
+            d.Vector3 dtmp = d.BodyGetPosition(Body);
+            Vector3 localpos = new Vector3(dtmp.X, dtmp.Y, dtmp.Z);
+
+            // the Amotor still lets avatar rotation to drift during colisions
+            // so force it back to identity
+
+            d.Quaternion qtmp;
+            qtmp.W = m_orientation2D.W;
+            qtmp.X = m_orientation2D.X;
+            qtmp.Y = m_orientation2D.Y;
+            qtmp.Z = m_orientation2D.Z;
+            d.BodySetQuaternion(Body, ref qtmp);
+
+            if (m_pidControllerActive == false)
+            {
+                _zeroPosition = localpos;
+            }
+
+            if (!localpos.IsFinite())
+            {
+                m_log.Warn("[PHYSICS]: Avatar Position is non-finite!");
+                defects.Add(this);
+                // _parent_scene.RemoveCharacter(this);
+
+                // destroy avatar capsule and related ODE data
+                AvatarGeomAndBodyDestroy();
+                return;
+            }
+
+            // check outbounds forcing to be in world
+            bool fixbody = false;
+            if (localpos.X < 0.0f)
+            {
+                fixbody = true;
+                localpos.X = 0.1f;
+            }
+            else if (localpos.X > m_parent_scene.WorldExtents.X - 0.1f)
+            {
+                fixbody = true;
+                localpos.X = m_parent_scene.WorldExtents.X - 0.1f;
+            }
+            if (localpos.Y < 0.0f)
+            {
+                fixbody = true;
+                localpos.Y = 0.1f;
+            }
+            else if (localpos.Y > m_parent_scene.WorldExtents.Y - 0.1)
+            {
+                fixbody = true;
+                localpos.Y = m_parent_scene.WorldExtents.Y - 0.1f;
+            }
+            if (fixbody)
+            {
+                m_freemove = false;
+                d.BodySetPosition(Body, localpos.X, localpos.Y, localpos.Z);
+            }
+
+            float breakfactor;
+
+            Vector3 vec = Vector3.Zero;
+            dtmp = d.BodyGetLinearVel(Body);
+            Vector3 vel = new Vector3(dtmp.X, dtmp.Y, dtmp.Z);
+            float velLengthSquared = vel.LengthSquared();
+
+            Vector3 ctz = _target_velocity;
+
+            float movementdivisor = 1f;
+            //Ubit change divisions into multiplications below
+            if (!m_alwaysRun)
+                movementdivisor = 1 / walkDivisor;
+            else
+                movementdivisor = 1 / runDivisor;
+
+            ctz.X *= movementdivisor;
+            ctz.Y *= movementdivisor;
+
+            //******************************************
+            // colide with land
+
+            d.AABB aabb;
+//            d.GeomGetAABB(feetbox, out aabb);
+            d.GeomGetAABB(capsule, out aabb);
+            float chrminZ = aabb.MinZ; // move up a bit
+            Vector3 posch = localpos;
+
+            float ftmp;
+
+            if (m_flying)
+            {
+                ftmp = timeStep;
+                posch.X += vel.X * ftmp;
+                posch.Y += vel.Y * ftmp;
+            }
+
+            float terrainheight = m_parent_scene.GetTerrainHeightAtXY(posch.X, posch.Y);
+            if (chrminZ < terrainheight)
+            {
+                if (ctz.Z < 0)
+                    ctz.Z = 0;
+
+                if(!m_haveLastFallVel)
+                {
+                    m_lastFallVel = vel;
+                    m_haveLastFallVel = true;
+                }
+
+                Vector3 n = m_parent_scene.GetTerrainNormalAtXY(posch.X, posch.Y);
+                float depth = terrainheight - chrminZ;
+
+                vec.Z = depth * PID_P * 50;
+
+                if (!m_flying)
+                {
+                    vec.Z += -vel.Z * PID_D;
+                    if(n.Z < 0.4f)
+                    {
+                        vec.X = depth * PID_P * 50 - vel.X * PID_D;
+                        vec.X *= n.X;
+                        vec.Y = depth * PID_P * 50 - vel.Y * PID_D;
+                        vec.Y *= n.Y;
+                        vec.Z *= n.Z;
+                        if(n.Z < 0.1f)
+                        {
+                            // cancel the slope pose
+                            n.X = 0f;
+                            n.Y = 0f;
+                            n.Z = 1.0f;
+                         }
+                    }
+                }
+
+                if (depth < 0.2f)
+                {
+                    m_colliderGroundfilter++;
+                    if (m_colliderGroundfilter > 2)
+                    {
+                        m_iscolliding = true;
+                        m_colliderfilter = 2;
+
+                        if (m_colliderGroundfilter > 10)
+                        {
+                            m_colliderGroundfilter = 10;
+                            m_freemove = false;
+                        }
+
+                        m_collideNormal.X = n.X;
+                        m_collideNormal.Y = n.Y;
+                        m_collideNormal.Z = n.Z;
+
+                        m_iscollidingGround = true;
+
+                        ContactPoint contact = new ContactPoint();
+                        contact.PenetrationDepth = depth;
+                        contact.Position.X = localpos.X;
+                        contact.Position.Y = localpos.Y;
+                        contact.Position.Z = terrainheight;
+                        contact.SurfaceNormal.X = -n.X;
+                        contact.SurfaceNormal.Y = -n.Y;
+                        contact.SurfaceNormal.Z = -n.Z;
+                        contact.RelativeSpeed = Vector3.Dot(m_lastFallVel, n);
+                        contact.CharacterFeet = true;
+                        AddCollisionEvent(0, contact);
+                        m_lastFallVel = vel;
+
+//                        vec.Z *= 0.5f;
+                    }
+                }
+
+                else
+                {
+                    m_colliderGroundfilter -= 5;
+                    if (m_colliderGroundfilter <= 0)
+                    {
+                        m_colliderGroundfilter = 0;
+                        m_iscollidingGround = false;
+                    }
+                }
+            }
+            else
+            {
+                m_haveLastFallVel = false;
+                m_colliderGroundfilter -= 5;
+                if (m_colliderGroundfilter <= 0)
+                {
+                    m_colliderGroundfilter = 0;
+                    m_iscollidingGround = false;
+                }
+            }
+
+            bool hoverPIDActive = false;
+
+            if (m_useHoverPID && m_PIDHoverTau != 0 && m_PIDHoverHeight != 0)
+            {
+                hoverPIDActive = true;
+
+                switch (m_PIDHoverType)
+                {
+                    case PIDHoverType.Ground:
+                        m_targetHoverHeight = terrainheight + m_PIDHoverHeight;
+                        break;
+
+                    case PIDHoverType.GroundAndWater:
+                        float waterHeight = m_parent_scene.GetWaterLevel();
+                        if (terrainheight > waterHeight)
+                            m_targetHoverHeight = terrainheight + m_PIDHoverHeight;
+                        else
+                            m_targetHoverHeight = waterHeight + m_PIDHoverHeight;
+                        break;
+                }     // end switch (m_PIDHoverType)
+
+                    // don't go underground
+                if (m_targetHoverHeight > terrainheight + 0.5f * (aabb.MaxZ - aabb.MinZ))
+                {
+                    float fz = (m_targetHoverHeight - localpos.Z);
+
+                    //  if error is zero, use position control; otherwise, velocity control
+                    if (Math.Abs(fz) < 0.01f)
+                    {
+                        ctz.Z = 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);
+
+                        ctz.Z = fz;
+                    }
+                }
+            }
+
+            //******************************************
+            if (!m_iscolliding)
+                m_collideNormal.Z = 0;
+
+            bool tviszero = (ctz.X == 0.0f && ctz.Y == 0.0f && ctz.Z == 0.0f);
+
+            if (!tviszero)
+            {
+                m_freemove = false;
+
+                // movement relative to surface if moving on it
+                // dont disturbe vertical movement, ie jumps
+                if (m_iscolliding && !m_flying && ctz.Z == 0 && m_collideNormal.Z > 0.2f && m_collideNormal.Z < 0.94f)
+                {
+                    float p = ctz.X * m_collideNormal.X + ctz.Y * m_collideNormal.Y;
+                    ctz.X *= (float)Math.Sqrt(1 - m_collideNormal.X * m_collideNormal.X);
+                    ctz.Y *= (float)Math.Sqrt(1 - m_collideNormal.Y * m_collideNormal.Y);
+                    ctz.Z -= p;
+                    if (ctz.Z < 0)
+                        ctz.Z *= 2;
+
+                }
+
+            }
+
+            if (!m_freemove)
+            {
+
+                //  if velocity is zero, use position control; otherwise, velocity control
+                if (tviszero && m_iscolliding && !m_flying)
+                {
+                    //  keep track of where we stopped.  No more slippin' & slidin'
+                    if (!_zeroFlag)
+                    {
+                        _zeroFlag = true;
+                        _zeroPosition = localpos;
+                    }
+                    if (m_pidControllerActive)
+                    {
+                        // We only want to deactivate the PID Controller if we think we want to have our surrogate
+                        // react to the physics scene by moving it's position.
+                        // Avatar to Avatar collisions
+                        // Prim to avatar collisions
+
+                        vec.X = -vel.X * PID_D * 2f + (_zeroPosition.X - localpos.X) * (PID_P * 5);
+                        vec.Y = -vel.Y * PID_D * 2f + (_zeroPosition.Y - localpos.Y) * (PID_P * 5);
+                        if(vel.Z > 0)
+                            vec.Z += -vel.Z * PID_D + (_zeroPosition.Z - localpos.Z) * PID_P;
+                        else
+                            vec.Z += (-vel.Z * PID_D + (_zeroPosition.Z - localpos.Z) * PID_P) * 0.2f;
+/*
+                        if (flying)
+                        {
+                            vec.Z += -vel.Z * PID_D + (_zeroPosition.Z - localpos.Z) * PID_P;
+                        }
+*/
+                    }
+                    //PidStatus = true;
+                }
+                else
+                {
+                    m_pidControllerActive = true;
+                    _zeroFlag = false;
+
+                    if (m_iscolliding)
+                    {
+                        if (!m_flying)
+                        {
+                            // we are on a surface
+                            if (ctz.Z > 0f)
+                            {
+                                // moving up or JUMPING
+                                vec.Z += (ctz.Z - vel.Z) * PID_D * 2f;
+                                vec.X += (ctz.X - vel.X) * (PID_D);
+                                vec.Y += (ctz.Y - vel.Y) * (PID_D);
+                            }
+                            else
+                            {
+                                // we are moving down on a surface
+                                if (ctz.Z == 0)
+                                {
+                                    if (vel.Z > 0)
+                                        vec.Z -= vel.Z * PID_D * 2f;
+                                    vec.X += (ctz.X - vel.X) * (PID_D);
+                                    vec.Y += (ctz.Y - vel.Y) * (PID_D);
+                                }
+                                // intencionally going down
+                                else
+                                {
+                                    if (ctz.Z < vel.Z)
+                                        vec.Z += (ctz.Z - vel.Z) * PID_D;
+                                    else
+                                    {
+                                    }
+
+                                    if (Math.Abs(ctz.X) > Math.Abs(vel.X))
+                                        vec.X += (ctz.X - vel.X) * (PID_D);
+                                    if (Math.Abs(ctz.Y) > Math.Abs(vel.Y))
+                                        vec.Y += (ctz.Y - vel.Y) * (PID_D);
+                                }
+                            }
+
+                            // We're standing on something
+                        }
+                        else
+                        {
+                            // We're flying and colliding with something
+                            vec.X += (ctz.X - vel.X) * (PID_D * 0.0625f);
+                            vec.Y += (ctz.Y - vel.Y) * (PID_D * 0.0625f);
+                            vec.Z += (ctz.Z - vel.Z) * (PID_D * 0.0625f);
+                        }
+                    }
+                    else // ie not colliding
+                    {
+                        if (m_flying || hoverPIDActive) //(!m_iscolliding && flying)
+                        {
+                            // we're in mid air suspended
+                            vec.X += (ctz.X - vel.X) * (PID_D);
+                            vec.Y += (ctz.Y - vel.Y) * (PID_D);
+                            vec.Z += (ctz.Z - vel.Z) * (PID_D);
+                        }
+
+                        else
+                        {
+                            // we're not colliding and we're not flying so that means we're falling!
+                            // m_iscolliding includes collisions with the ground.
+
+                            // d.Vector3 pos = d.BodyGetPosition(Body);
+                            vec.X += (ctz.X - vel.X) * PID_D * 0.833f;
+                            vec.Y += (ctz.Y - vel.Y) * PID_D * 0.833f;
+                            // hack for  breaking on fall
+                            if (ctz.Z == -9999f)
+                                vec.Z += -vel.Z * PID_D - m_parent_scene.gravityz * m_mass;
+                        }
+                    }
+                }
+
+                if (velLengthSquared > 2500.0f) // 50m/s apply breaks
+                {
+                    breakfactor = 0.16f * m_mass;
+                    vec.X -= breakfactor * vel.X;
+                    vec.Y -= breakfactor * vel.Y;
+                    vec.Z -= breakfactor * vel.Z;
+                }
+            }
+            else
+            {
+                breakfactor = m_mass;
+                vec.X -= breakfactor * vel.X;
+                vec.Y -= breakfactor * vel.Y;
+                if (m_flying)
+                    vec.Z -= 0.5f * breakfactor * vel.Z;
+                else
+                    vec.Z -= .16f* m_mass * vel.Z;
+            }
+
+            if (m_flying || hoverPIDActive)
+            {
+                vec.Z -= m_parent_scene.gravityz * m_mass;
+
+                if(!hoverPIDActive)
+                {
+                    //Added for auto fly height. Kitto Flora
+                    float target_altitude = terrainheight + MinimumGroundFlightOffset;
+
+                    if (localpos.Z < target_altitude)
+                    {
+                       vec.Z += (target_altitude - localpos.Z) * PID_P * 5.0f;
+                    }
+                    // end add Kitto Flora
+                }
+            }
+
+            if (vec.IsFinite())
+            {
+                if (vec.X != 0 || vec.Y !=0 || vec.Z !=0)
+                    d.BodyAddForce(Body, vec.X, vec.Y, vec.Z);
+            }
+            else
+            {
+                m_log.Warn("[PHYSICS]: Got a NaN force vector in Move()");
+                m_log.Warn("[PHYSICS]: Avatar Position is non-finite!");
+                defects.Add(this);
+                // _parent_scene.RemoveCharacter(this);
+                // destroy avatar capsule and related ODE data
+                AvatarGeomAndBodyDestroy();
+                return;
+            }
+
+            // update our local ideia of position velocity and aceleration
+            //            _position = localpos;
+            _position = localpos;
+
+            if (_zeroFlag)
+            {
+                _velocity = Vector3.Zero;
+                _acceleration = Vector3.Zero;
+                m_rotationalVelocity = Vector3.Zero;
+            }
+            else
+            {
+                Vector3 a =_velocity; // previus velocity
+                SetSmooth(ref _velocity, ref vel, 2);
+                a = (_velocity - a) * invtimeStep;
+                SetSmooth(ref _acceleration, ref a, 2);
+
+                dtmp = d.BodyGetAngularVel(Body);
+                m_rotationalVelocity.X = 0f;
+                m_rotationalVelocity.Y = 0f;
+                m_rotationalVelocity.Z = dtmp.Z;
+                Math.Round(m_rotationalVelocity.Z,3);
+            }
+        }
+
+        public void round(ref Vector3 v, int digits)
+        {
+            v.X = (float)Math.Round(v.X, digits);
+            v.Y = (float)Math.Round(v.Y, digits);
+            v.Z = (float)Math.Round(v.Z, digits);
+         }
+
+        public void SetSmooth(ref Vector3 dst, ref Vector3 value)
+        {
+            dst.X = 0.1f * dst.X + 0.9f * value.X;
+            dst.Y = 0.1f * dst.Y + 0.9f * value.Y;
+            dst.Z = 0.1f * dst.Z + 0.9f * value.Z;
+        }
+
+        public void SetSmooth(ref Vector3 dst, ref Vector3 value, int rounddigits)
+        {
+            dst.X = 0.4f * dst.X + 0.6f * value.X;
+            dst.X = (float)Math.Round(dst.X, rounddigits);
+
+            dst.Y = 0.4f * dst.Y + 0.6f * value.Y;
+            dst.Y = (float)Math.Round(dst.Y, rounddigits);
+
+            dst.Z = 0.4f * dst.Z + 0.6f * value.Z;
+            dst.Z = (float)Math.Round(dst.Z, rounddigits);
+        }
+
+
+        /// <summary>
+        /// Updates the reported position and velocity.
+        /// Used to copy variables from unmanaged space at heartbeat rate and also trigger scene updates acording
+        /// also outbounds checking
+        /// copy and outbounds now done in move(..) at ode rate
+        ///
+        /// </summary>
+        public void UpdatePositionAndVelocity()
+        {
+            return;
+
+//            if (Body == IntPtr.Zero)
+//                return;
+
+        }
+
+        /// <summary>
+        /// Cleanup the things we use in the scene.
+        /// </summary>
+        public void Destroy()
+        {
+            AddChange(changes.Remove, null);
+        }
+
+        public override void CrossingFailure()
+        {
+        }
+
+        public override Vector3 PIDTarget { set { return; } }
+        public override bool PIDActive {get {return m_pidControllerActive;} set { return; } }
+        public override float PIDTau { set { return; } }
+
+        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 > timeStep ? 0.05f : 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 void SubscribeEvents(int ms)
+        {
+            m_eventsubscription = ms;
+            m_cureventsubscription = 0;
+            CollisionEventsThisFrame.Clear();
+            SentEmptyCollisionsEvent = false;
+        }
+
+        public override void UnSubscribeEvents()
+        {
+            m_eventsubscription = 0;
+            m_parent_scene.RemoveCollisionEventReporting(this);
+            lock(CollisionEventsThisFrame)
+                CollisionEventsThisFrame.Clear();
+        }
+
+        public override void AddCollisionEvent(uint CollidedWith, ContactPoint contact)
+        {
+            lock(CollisionEventsThisFrame)
+                CollisionEventsThisFrame.AddCollider(CollidedWith, contact);
+            m_parent_scene.AddCollisionEventReporting(this);
+        }
+
+        public void SendCollisions(int timestep)
+        {
+            if (m_cureventsubscription < 50000)
+                m_cureventsubscription += timestep;
+
+            if (m_cureventsubscription < m_eventsubscription)
+                return;
+
+            lock(CollisionEventsThisFrame)
+            {
+                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
+                    {
+                        SentEmptyCollisionsEvent = false;
+                        CollisionEventsThisFrame.Clear();
+                    }
+                }
+            }
+        }
+
+        public override bool SubscribedEvents()
+        {
+            if (m_eventsubscription > 0)
+                return true;
+            return false;
+        }
+
+        private void changePhysicsStatus(bool NewStatus)
+        {
+            if (NewStatus != m_isPhysical)
+            {
+                if (NewStatus)
+                {
+                    AvatarGeomAndBodyDestroy();
+
+                    AvatarGeomAndBodyCreation(_position.X, _position.Y, _position.Z);
+
+                    m_parent_scene.actor_name_map[collider] = (PhysicsActor)this;
+                    m_parent_scene.actor_name_map[capsule] = (PhysicsActor)this;
+                    m_parent_scene.AddCharacter(this);
+                }
+                else
+                {
+                    m_parent_scene.RemoveCollisionEventReporting(this);
+                    m_parent_scene.RemoveCharacter(this);
+                    // destroy avatar capsule and related ODE data
+                    AvatarGeomAndBodyDestroy();
+                }
+                m_freemove = false;
+                m_isPhysical = NewStatus;
+            }
+        }
+
+        private void changeAdd()
+        {
+            changePhysicsStatus(true);
+        }
+
+        private void changeRemove()
+        {
+            changePhysicsStatus(false);
+        }
+
+        private void changeShape(PrimitiveBaseShape arg)
+        {
+        }
+
+        private void changeAvatarSize(strAvatarSize st)
+        {
+            m_feetOffset = st.offset;
+            changeSize(st.size);
+        }
+
+        private void changeSize(Vector3 pSize)
+        {
+            if (pSize.IsFinite())
+            {
+                // for now only look to Z changes since viewers also don't change X and Y
+                if (pSize.Z != m_size.Z)
+                {
+                    AvatarGeomAndBodyDestroy();
+
+                    float oldsz = m_size.Z;
+                    m_size = pSize;
+
+                    AvatarGeomAndBodyCreation(_position.X, _position.Y,
+                                      _position.Z + (m_size.Z - oldsz) * 0.5f);
+
+//                    Velocity = Vector3.Zero;
+                    m_targetVelocity = Vector3.Zero;
+
+                    m_parent_scene.actor_name_map[collider] = (PhysicsActor)this;
+                    m_parent_scene.actor_name_map[capsule] = (PhysicsActor)this;
+                }
+                m_freemove = false;
+                m_pidControllerActive = true;
+            }
+            else
+            {
+                m_log.Warn("[PHYSICS]: Got a NaN Size from Scene on a Character");
+            }
+        }
+
+        private void changePosition( Vector3 newPos)
+            {
+                if (Body != IntPtr.Zero)
+                    d.BodySetPosition(Body, newPos.X, newPos.Y, newPos.Z);
+                _position = newPos;
+                m_freemove = false;
+                m_pidControllerActive = true;
+            }
+
+        private void changeOrientation(Quaternion newOri)
+        {
+            if (m_orientation != newOri)
+            {
+                m_orientation = newOri; // keep a copy for core use
+                // but only use rotations around Z
+
+                m_orientation2D.W = newOri.W;
+                m_orientation2D.Z = newOri.Z;
+
+                float t = m_orientation2D.W * m_orientation2D.W + m_orientation2D.Z * m_orientation2D.Z;
+                if (t > 0)
+                {
+                    t = 1.0f / (float)Math.Sqrt(t);
+                    m_orientation2D.W *= t;
+                    m_orientation2D.Z *= t;
+                }
+                else
+                {
+                    m_orientation2D.W = 1.0f;
+                    m_orientation2D.Z = 0f;
+                }
+                m_orientation2D.Y = 0f;
+                m_orientation2D.X = 0f;
+
+                d.Quaternion myrot = new d.Quaternion();
+                myrot.X = m_orientation2D.X;
+                myrot.Y = m_orientation2D.Y;
+                myrot.Z = m_orientation2D.Z;
+                myrot.W = m_orientation2D.W;
+                d.BodySetQuaternion(Body, ref myrot);
+            }
+        }
+
+        private void changeVelocity(Vector3 newVel)
+        {
+            _velocity = newVel;
+            setFreeMove();
+
+            if (Body != IntPtr.Zero)
+                d.BodySetLinearVel(Body, newVel.X, newVel.Y, newVel.Z);
+        }
+
+        private void changeTargetVelocity(Vector3 newVel)
+        {
+            m_pidControllerActive = true;
+            m_freemove = false;
+            _target_velocity = newVel;
+        }
+
+        private void changeSetTorque(Vector3 newTorque)
+        {
+        }
+
+        private void changeAddForce(Vector3 newForce)
+        {
+        }
+
+        private void changeAddAngularForce(Vector3 arg)
+        {
+        }
+
+        private void changeAngularLock(byte arg)
+        {
+        }
+
+        private void changeFloatOnWater(bool arg)
+        {
+        }
+
+        private void changeVolumedetetion(bool arg)
+        {
+        }
+
+        private void changeSelectedStatus(bool arg)
+        {
+        }
+
+        private void changeDisable(bool arg)
+        {
+        }
+
+        private void changeBuilding(bool arg)
+        {
+        }
+
+        private void setFreeMove()
+        {
+            m_pidControllerActive = true;
+            _zeroFlag = false;
+            _target_velocity = Vector3.Zero;
+            m_freemove = true;
+            m_colliderfilter = -1;
+            m_colliderObjectfilter = -1;
+            m_colliderGroundfilter = -1;
+
+            m_iscolliding = false;
+            m_iscollidingGround = false;
+            m_iscollidingObj = false;
+
+            CollisionEventsThisFrame.Clear();
+        }
+
+        private void changeForce(Vector3 newForce)
+        {
+            setFreeMove();
+
+            if (Body != IntPtr.Zero)
+            {
+                if (newForce.X != 0f || newForce.Y != 0f || newForce.Z != 0)
+                    d.BodyAddForce(Body, newForce.X, newForce.Y, newForce.Z);
+            }
+        }
+
+        // for now momentum is actually velocity
+        private void changeMomentum(Vector3 newmomentum)
+        {
+            _velocity = newmomentum;
+            setFreeMove();
+
+            if (Body != IntPtr.Zero)
+                d.BodySetLinearVel(Body, newmomentum.X, newmomentum.Y, newmomentum.Z);
+        }
+
+        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 donullchange()
+        {
+        }
+
+        public bool DoAChange(changes what, object arg)
+        {
+            if (collider == IntPtr.Zero && what != changes.Add && what != changes.Remove)
+            {
+                return false;
+            }
+
+            // nasty switch
+            switch (what)
+            {
+                case changes.Add:
+                    changeAdd();
+                    break;
+                case changes.Remove:
+                    changeRemove();
+                    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:
+                    changeTargetVelocity((Vector3)arg);
+                    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:
+                    changeAddAngularForce((Vector3)arg);
+                    break;
+
+                case changes.AngLock:
+                    changeAngularLock((byte)arg);
+                    break;
+
+                case changes.Size:
+                    changeSize((Vector3)arg);
+                    break;
+
+                case changes.AvatarSize:
+                    changeAvatarSize((strAvatarSize)arg);
+                    break;
+
+                case changes.Momentum:
+                    changeMomentum((Vector3)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;
+
+/* not in use for now
+                case changes.Shape:
+                    changeShape((PrimitiveBaseShape)arg);
+                    break;
+
+                case changes.CollidesWater:
+                    changeFloatOnWater((bool)arg);
+                    break;
+
+                case changes.VolumeDtc:
+                    changeVolumedetetion((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.Null:
+                    donullchange();
+                    break;
+
+                default:
+                    donullchange();
+                    break;
+            }
+            return false;
+        }
+
+        public void AddChange(changes what, object arg)
+        {
+            m_parent_scene.AddChange((PhysicsActor)this, what, arg);
+        }
+
+        private struct strAvatarSize
+        {
+            public Vector3 size;
+            public float offset;
+        }
+
+    }
+}