Initial update to OpenSim 0.8.2.1 source code.

1 files changed, 0 insertions, 1513 deletions

diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs b/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
deleted file mode 100644
index 826261c..0000000
--- a/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
+++ /dev/null
@@ -1,1513 +0,0 @@
-/*
- * 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 copyrightD
- *       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.
- */
-
-using System;
-using System.Reflection;
-using System.Collections.Generic;
-using System.Xml;
-using log4net;
-using OMV = OpenMetaverse;
-using OpenSim.Framework;
-using OpenSim.Region.Physics.Manager;
-using OpenSim.Region.Physics.ConvexDecompositionDotNet;
-
-namespace OpenSim.Region.Physics.BulletSPlugin
-{
-
-    [Serializable]
-public sealed class BSPrim : BSPhysObject
-{
-    private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
-    private static readonly string LogHeader = "[BULLETS PRIM]";
-
-    // _size is what the user passed. Scale is what we pass to the physics engine with the mesh.
-    private OMV.Vector3 _size;  // the multiplier for each mesh dimension as passed by the user
-
-    private bool _grabbed;
-    private bool _isSelected;
-    private bool _isVolumeDetect;
-    private OMV.Vector3 _position;
-    private float _mass;    // the mass of this object
-    private float _density;
-    private OMV.Vector3 _force;
-    private OMV.Vector3 _velocity;
-    private OMV.Vector3 _torque;
-    private float _collisionScore;
-    private OMV.Vector3 _acceleration;
-    private OMV.Quaternion _orientation;
-    private int _physicsActorType;
-    private bool _isPhysical;
-    private bool _flying;
-    private float _friction;
-    private float _restitution;
-    private bool _setAlwaysRun;
-    private bool _throttleUpdates;
-    private bool _isColliding;
-    private bool _collidingGround;
-    private bool _collidingObj;
-    private bool _floatOnWater;
-    private OMV.Vector3 _rotationalVelocity;
-    private bool _kinematic;
-    private float _buoyancy;
-
-    private BSDynamics _vehicle;
-
-    private OMV.Vector3 _PIDTarget;
-    private bool _usePID;
-    private float _PIDTau;
-    private bool _useHoverPID;
-    private float _PIDHoverHeight;
-    private PIDHoverType _PIDHoverType;
-    private float _PIDHoverTao;
-
-    public BSPrim(uint localID, String primName, BSScene parent_scene, OMV.Vector3 pos, OMV.Vector3 size,
-                       OMV.Quaternion rotation, PrimitiveBaseShape pbs, bool pisPhysical)
-            : base(parent_scene, localID, primName, "BSPrim")
-    {
-        // m_log.DebugFormat("{0}: BSPrim creation of {1}, id={2}", LogHeader, primName, localID);
-        _physicsActorType = (int)ActorTypes.Prim;
-        _position = pos;
-        _size = size;
-        Scale = size;   // prims are the size the user wants them to be (different for BSCharactes).
-        _orientation = rotation;
-        _buoyancy = 0f;
-        _velocity = OMV.Vector3.Zero;
-        _rotationalVelocity = OMV.Vector3.Zero;
-        BaseShape = pbs;
-        _isPhysical = pisPhysical;
-        _isVolumeDetect = false;
-
-        // Someday set default attributes based on the material but, for now, we don't know the prim material yet.
-        // MaterialAttributes primMat = BSMaterials.GetAttributes(Material, pisPhysical);
-        _density = PhysicsScene.Params.defaultDensity;
-        _friction = PhysicsScene.Params.defaultFriction;
-        _restitution = PhysicsScene.Params.defaultRestitution;
-
-        _vehicle = new BSDynamics(PhysicsScene, this);            // add vehicleness
-
-        _mass = CalculateMass();
-
-        // Cause linkset variables to be initialized (like mass)
-        Linkset.Refresh(this);
-
-        DetailLog("{0},BSPrim.constructor,call", LocalID);
-        // do the actual object creation at taint time
-        PhysicsScene.TaintedObject("BSPrim.create", delegate()
-        {
-            CreateGeomAndObject(true);
-
-            CurrentCollisionFlags = PhysicsScene.PE.GetCollisionFlags(PhysBody);
-        });
-    }
-
-    // called when this prim is being destroyed and we should free all the resources
-    public override void Destroy()
-    {
-        // m_log.DebugFormat("{0}: Destroy, id={1}", LogHeader, LocalID);
-        base.Destroy();
-
-        // Undo any links between me and any other object
-        BSPhysObject parentBefore = Linkset.LinksetRoot;
-        int childrenBefore = Linkset.NumberOfChildren;
-
-        Linkset = Linkset.RemoveMeFromLinkset(this);
-
-        DetailLog("{0},BSPrim.Destroy,call,parentBefore={1},childrenBefore={2},parentAfter={3},childrenAfter={4}",
-            LocalID, parentBefore.LocalID, childrenBefore, Linkset.LinksetRoot.LocalID, Linkset.NumberOfChildren);
-
-        // Undo any vehicle properties
-        this.VehicleType = (int)Vehicle.TYPE_NONE;
-
-        PhysicsScene.TaintedObject("BSPrim.destroy", delegate()
-        {
-            DetailLog("{0},BSPrim.Destroy,taint,", LocalID);
-            // If there are physical body and shape, release my use of same.
-            PhysicsScene.Shapes.DereferenceBody(PhysBody, true, null);
-            PhysBody.Clear();
-            PhysicsScene.Shapes.DereferenceShape(PhysShape, true, null);
-            PhysShape.Clear();
-        });
-    }
-
-    // No one uses this property.
-    public override bool Stopped {
-        get { return false; }
-    }
-    public override OMV.Vector3 Size {
-        get { return _size; }
-        set {
-            // We presume the scale and size are the same. If scale must be changed for
-            //     the physical shape, that is done when the geometry is built.
-            _size = value;
-            Scale = _size;
-            ForceBodyShapeRebuild(false);
-        }
-    }
-
-    public override PrimitiveBaseShape Shape {
-        set {
-            BaseShape = value;
-            ForceBodyShapeRebuild(false);
-        }
-    }
-    // Whatever the linkset wants is what I want.
-    public override BSPhysicsShapeType PreferredPhysicalShape
-        { get { return Linkset.PreferredPhysicalShape(this); } }
-
-    public override bool ForceBodyShapeRebuild(bool inTaintTime)
-    {
-        LastAssetBuildFailed = false;
-        PhysicsScene.TaintedObject(inTaintTime, "BSPrim.ForceBodyShapeRebuild", delegate()
-        {
-            _mass = CalculateMass();   // changing the shape changes the mass
-            CreateGeomAndObject(true);
-        });
-        return true;
-    }
-    public override bool Grabbed {
-        set { _grabbed = value;
-        }
-    }
-    public override bool Selected {
-        set
-        {
-            if (value != _isSelected)
-            {
-                _isSelected = value;
-                PhysicsScene.TaintedObject("BSPrim.setSelected", delegate()
-                {
-                    DetailLog("{0},BSPrim.selected,taint,selected={1}", LocalID, _isSelected);
-                    SetObjectDynamic(false);
-                });
-            }
-        }
-    }
-    public override void CrossingFailure() { return; }
-
-    // link me to the specified parent
-    public override void link(PhysicsActor obj) {
-        BSPrim parent = obj as BSPrim;
-        if (parent != null)
-        {
-            BSPhysObject parentBefore = Linkset.LinksetRoot;
-            int childrenBefore = Linkset.NumberOfChildren;
-
-            Linkset = parent.Linkset.AddMeToLinkset(this);
-
-            DetailLog("{0},BSPrim.link,call,parentBefore={1}, childrenBefore=={2}, parentAfter={3}, childrenAfter={4}",
-                LocalID, parentBefore.LocalID, childrenBefore, Linkset.LinksetRoot.LocalID, Linkset.NumberOfChildren);
-        }
-        return;
-    }
-
-    // delink me from my linkset
-    public override void delink() {
-        // TODO: decide if this parent checking needs to happen at taint time
-        // Race condition here: if link() and delink() in same simulation tick, the delink will not happen
-
-        BSPhysObject parentBefore = Linkset.LinksetRoot;
-        int childrenBefore = Linkset.NumberOfChildren;
-
-        Linkset = Linkset.RemoveMeFromLinkset(this);
-
-        DetailLog("{0},BSPrim.delink,parentBefore={1},childrenBefore={2},parentAfter={3},childrenAfter={4}, ",
-            LocalID, parentBefore.LocalID, childrenBefore, Linkset.LinksetRoot.LocalID, Linkset.NumberOfChildren);
-        return;
-    }
-
-    // Set motion values to zero.
-    // Do it to the properties so the values get set in the physics engine.
-    // Push the setting of the values to the viewer.
-    // Called at taint time!
-    public override void ZeroMotion(bool inTaintTime)
-    {
-        _velocity = OMV.Vector3.Zero;
-        _acceleration = OMV.Vector3.Zero;
-        _rotationalVelocity = OMV.Vector3.Zero;
-
-        // Zero some other properties in the physics engine
-        PhysicsScene.TaintedObject(inTaintTime, "BSPrim.ZeroMotion", delegate()
-        {
-            if (PhysBody.HasPhysicalBody)
-                PhysicsScene.PE.ClearAllForces(PhysBody);
-        });
-    }
-    public override void ZeroAngularMotion(bool inTaintTime)
-    {
-        _rotationalVelocity = OMV.Vector3.Zero;
-        // Zero some other properties in the physics engine
-        PhysicsScene.TaintedObject(inTaintTime, "BSPrim.ZeroMotion", delegate()
-        {
-            // DetailLog("{0},BSPrim.ZeroAngularMotion,call,rotVel={1}", LocalID, _rotationalVelocity);
-            if (PhysBody.HasPhysicalBody)
-            {
-                PhysicsScene.PE.SetInterpolationAngularVelocity(PhysBody, _rotationalVelocity);
-                PhysicsScene.PE.SetAngularVelocity(PhysBody, _rotationalVelocity);
-            }
-        });
-    }
-
-    public override void LockAngularMotion(OMV.Vector3 axis)
-    {
-        DetailLog("{0},BSPrim.LockAngularMotion,call,axis={1}", LocalID, axis);
-        return;
-    }
-
-    public override OMV.Vector3 RawPosition
-    {
-        get { return _position; }
-        set { _position = value; }
-    }
-    public override OMV.Vector3 Position {
-        get {
-            /* NOTE: this refetch is not necessary. The simulator knows about linkset children
-             *    and does not fetch this position info for children. Thus this is commented out.
-            // child prims move around based on their parent. Need to get the latest location
-            if (!Linkset.IsRoot(this))
-                _position = Linkset.PositionGet(this);
-            */
-
-            // don't do the GetObjectPosition for root elements because this function is called a zillion times.
-            // _position = PhysicsScene.PE.GetObjectPosition2(PhysicsScene.World, BSBody);
-            return _position;
-        }
-        set {
-            // If the position must be forced into the physics engine, use ForcePosition.
-            // All positions are given in world positions.
-            if (_position == value)
-            {
-                DetailLog("{0},BSPrim.setPosition,call,positionNotChanging,pos={1},orient={2}", LocalID, _position, _orientation);
-                return;
-            }
-            _position = value;
-            PositionSanityCheck(false);
-
-            // A linkset might need to know if a component information changed.
-            Linkset.UpdateProperties(this, false);
-
-            PhysicsScene.TaintedObject("BSPrim.setPosition", delegate()
-            {
-                DetailLog("{0},BSPrim.SetPosition,taint,pos={1},orient={2}", LocalID, _position, _orientation);
-                ForcePosition = _position;
-            });
-        }
-    }
-    public override OMV.Vector3 ForcePosition {
-        get {
-            _position = PhysicsScene.PE.GetPosition(PhysBody);
-            return _position;
-        }
-        set {
-            _position = value;
-            if (PhysBody.HasPhysicalBody)
-            {
-                PhysicsScene.PE.SetTranslation(PhysBody, _position, _orientation);
-                ActivateIfPhysical(false);
-            }
-        }
-    }
-
-    // Check that the current position is sane and, if not, modify the position to make it so.
-    // Check for being below terrain and being out of bounds.
-    // Returns 'true' of the position was made sane by some action.
-    private bool PositionSanityCheck(bool inTaintTime)
-    {
-        bool ret = false;
-
-        if (!PhysicsScene.TerrainManager.IsWithinKnownTerrain(_position))
-        {
-            // The physical object is out of the known/simulated area.
-            // Upper levels of code will handle the transition to other areas so, for
-            //     the time, we just ignore the position.
-            return ret;
-        }
-
-        float terrainHeight = PhysicsScene.TerrainManager.GetTerrainHeightAtXYZ(_position);
-        OMV.Vector3 upForce = OMV.Vector3.Zero;
-        if (RawPosition.Z < terrainHeight)
-        {
-            DetailLog("{0},BSPrim.PositionAdjustUnderGround,call,pos={1},terrain={2}", LocalID, _position, terrainHeight);
-            float targetHeight = terrainHeight + (Size.Z / 2f);
-            // Upforce proportional to the distance away from the terrain. Correct the error in 1 sec.
-            upForce.Z = (terrainHeight - RawPosition.Z) * 1f;
-            ret = true;
-        }
-
-        if ((CurrentCollisionFlags & CollisionFlags.BS_FLOATS_ON_WATER) != 0)
-        {
-            float waterHeight = PhysicsScene.TerrainManager.GetWaterLevelAtXYZ(_position);
-            // TODO: a floating motor so object will bob in the water
-            if (Math.Abs(RawPosition.Z - waterHeight) > 0.1f)
-            {
-                // Upforce proportional to the distance away from the water. Correct the error in 1 sec.
-                upForce.Z = (waterHeight - RawPosition.Z) * 1f;
-                ret = true;
-            }
-        }
-
-        // The above code computes a force to apply to correct any out-of-bounds problems. Apply same.
-        // TODO: This should be intergrated with a geneal physics action mechanism.
-        // TODO: This should be moderated with PID'ness.
-        if (ret)
-        {
-            // Apply upforce and overcome gravity.
-            OMV.Vector3 correctionForce = upForce - PhysicsScene.DefaultGravity;
-            DetailLog("{0},BSPrim.PositionSanityCheck,applyForce,pos={1},upForce={2},correctionForce={3}", LocalID, _position, upForce, correctionForce);
-            AddForce(correctionForce, false, inTaintTime);
-        }
-        return ret;
-    }
-
-    // Return the effective mass of the object.
-        // The definition of this call is to return the mass of the prim.
-        // If the simulator cares about the mass of the linkset, it will sum it itself.
-    public override float Mass
-    {
-        get
-        {
-            return _mass;
-        }
-    }
-
-    // used when we only want this prim's mass and not the linkset thing
-    public override float RawMass { 
-        get { return _mass; }
-    }
-    // Set the physical mass to the passed mass.
-    // Note that this does not change _mass!
-    public override void UpdatePhysicalMassProperties(float physMass, bool inWorld)
-    {
-        if (PhysBody.HasPhysicalBody)
-        {
-            if (IsStatic)
-            {
-                PhysicsScene.PE.SetGravity(PhysBody, PhysicsScene.DefaultGravity);
-                Inertia = OMV.Vector3.Zero;
-                PhysicsScene.PE.SetMassProps(PhysBody, 0f, Inertia);
-                PhysicsScene.PE.UpdateInertiaTensor(PhysBody);
-            }
-            else
-            {
-                OMV.Vector3 grav = ComputeGravity();
-
-                if (inWorld)
-                {
-                    // Changing interesting properties doesn't change proxy and collision cache
-                    //    information. The Bullet solution is to re-add the object to the world
-                    //    after parameters are changed.
-                    PhysicsScene.PE.RemoveObjectFromWorld(PhysicsScene.World, PhysBody);
-                }
-
-                // The computation of mass props requires gravity to be set on the object.
-                PhysicsScene.PE.SetGravity(PhysBody, grav);
-
-                Inertia = PhysicsScene.PE.CalculateLocalInertia(PhysShape, physMass);
-                PhysicsScene.PE.SetMassProps(PhysBody, physMass, Inertia);
-                PhysicsScene.PE.UpdateInertiaTensor(PhysBody);
-
-                // center of mass is at the zero of the object
-                // DEBUG DEBUG PhysicsScene.PE.SetCenterOfMassByPosRot(PhysBody, ForcePosition, ForceOrientation);
-                DetailLog("{0},BSPrim.UpdateMassProperties,mass={1},localInertia={2},grav={3},inWorld={4}", LocalID, physMass, Inertia, grav, inWorld);
-
-                if (inWorld)
-                {
-                    AddObjectToPhysicalWorld();
-                }
-
-                // Must set gravity after it has been added to the world because, for unknown reasons,
-                //     adding the object resets the object's gravity to world gravity
-                PhysicsScene.PE.SetGravity(PhysBody, grav);
-
-            }
-        }
-    }
-
-    // Return what gravity should be set to this very moment
-    private OMV.Vector3 ComputeGravity()
-    {
-        OMV.Vector3 ret = PhysicsScene.DefaultGravity;
-
-        if (!IsStatic)
-            ret *= (1f - Buoyancy);
-
-        return ret;
-    }
-
-    // Is this used?
-    public override OMV.Vector3 CenterOfMass
-    {
-        get { return Linkset.CenterOfMass; }
-    }
-
-    // Is this used?
-    public override OMV.Vector3 GeometricCenter
-    {
-        get { return Linkset.GeometricCenter; }
-    }
-
-    public override OMV.Vector3 Force {
-        get { return _force; }
-        set {
-            _force = value;
-            if (_force != OMV.Vector3.Zero)
-            {
-                // If the force is non-zero, it must be reapplied each tick because
-                //    Bullet clears the forces applied last frame.
-                RegisterPreStepAction("BSPrim.setForce", LocalID,
-                    delegate(float timeStep)
-                    {
-                        DetailLog("{0},BSPrim.setForce,preStep,force={1}", LocalID, _force);
-                        if (PhysBody.HasPhysicalBody)
-                        {
-                            PhysicsScene.PE.ApplyCentralForce(PhysBody, _force);
-                            ActivateIfPhysical(false);
-                        }
-                    }
-                );
-            }
-            else
-            {
-                UnRegisterPreStepAction("BSPrim.setForce", LocalID);
-            }
-        }
-    }
-
-    public override int VehicleType {
-        get {
-            return (int)_vehicle.Type;   // if we are a vehicle, return that type
-        }
-        set {
-            Vehicle type = (Vehicle)value;
-
-            PhysicsScene.TaintedObject("setVehicleType", delegate()
-            {
-                // Done at taint time so we're sure the physics engine is not using the variables
-                // Vehicle code changes the parameters for this vehicle type.
-                _vehicle.ProcessTypeChange(type);
-                ActivateIfPhysical(false);
-
-                // If an active vehicle, register the vehicle code to be called before each step
-                if (_vehicle.Type == Vehicle.TYPE_NONE)
-                    UnRegisterPreStepAction("BSPrim.Vehicle", LocalID);
-                else
-                    RegisterPreStepAction("BSPrim.Vehicle", LocalID, _vehicle.Step);
-            });
-        }
-    }
-    public override void VehicleFloatParam(int param, float value)
-    {
-        PhysicsScene.TaintedObject("BSPrim.VehicleFloatParam", delegate()
-        {
-            _vehicle.ProcessFloatVehicleParam((Vehicle)param, value);
-            ActivateIfPhysical(false);
-        });
-    }
-    public override void VehicleVectorParam(int param, OMV.Vector3 value)
-    {
-        PhysicsScene.TaintedObject("BSPrim.VehicleVectorParam", delegate()
-        {
-            _vehicle.ProcessVectorVehicleParam((Vehicle)param, value);
-            ActivateIfPhysical(false);
-        });
-    }
-    public override void VehicleRotationParam(int param, OMV.Quaternion rotation)
-    {
-        PhysicsScene.TaintedObject("BSPrim.VehicleRotationParam", delegate()
-        {
-            _vehicle.ProcessRotationVehicleParam((Vehicle)param, rotation);
-            ActivateIfPhysical(false);
-        });
-    }
-    public override void VehicleFlags(int param, bool remove)
-    {
-        PhysicsScene.TaintedObject("BSPrim.VehicleFlags", delegate()
-        {
-            _vehicle.ProcessVehicleFlags(param, remove);
-        });
-    }
-
-    // Allows the detection of collisions with inherently non-physical prims. see llVolumeDetect for more
-    public override void SetVolumeDetect(int param) {
-        bool newValue = (param != 0);
-        if (_isVolumeDetect != newValue)
-        {
-            _isVolumeDetect = newValue;
-            PhysicsScene.TaintedObject("BSPrim.SetVolumeDetect", delegate()
-            {
-                // DetailLog("{0},setVolumeDetect,taint,volDetect={1}", LocalID, _isVolumeDetect);
-                SetObjectDynamic(true);
-            });
-        }
-        return;
-    }
-    public override OMV.Vector3 Velocity {
-        get { return _velocity; }
-        set {
-            _velocity = value;
-            PhysicsScene.TaintedObject("BSPrim.setVelocity", delegate()
-            {
-                // DetailLog("{0},BSPrim.SetVelocity,taint,vel={1}", LocalID, _velocity);
-                ForceVelocity = _velocity;
-            });
-        }
-    }
-    public override OMV.Vector3 ForceVelocity {
-        get { return _velocity; }
-        set {
-            PhysicsScene.AssertInTaintTime("BSPrim.ForceVelocity");
-
-            _velocity = value;
-            if (PhysBody.HasPhysicalBody)
-            {
-                PhysicsScene.PE.SetLinearVelocity(PhysBody, _velocity);
-                ActivateIfPhysical(false);
-            }
-        }
-    }
-    public override OMV.Vector3 Torque {
-        get { return _torque; }
-        set {
-            _torque = value;
-            if (_torque != OMV.Vector3.Zero)
-            {
-                // If the torque is non-zero, it must be reapplied each tick because
-                //    Bullet clears the forces applied last frame.
-                RegisterPreStepAction("BSPrim.setTorque", LocalID,
-                    delegate(float timeStep)
-                    {
-                        if (PhysBody.HasPhysicalBody)
-                            AddAngularForce(_torque, false, true);
-                    }
-                );
-            }
-            else
-            {
-                UnRegisterPreStepAction("BSPrim.setTorque", LocalID);
-            }
-            // DetailLog("{0},BSPrim.SetTorque,call,torque={1}", LocalID, _torque);
-        }
-    }
-    public override float CollisionScore {
-        get { return _collisionScore; }
-        set { _collisionScore = value;
-        }
-    }
-    public override OMV.Vector3 Acceleration {
-        get { return _acceleration; }
-        set { _acceleration = value; }
-    }
-    public override OMV.Quaternion RawOrientation
-    {
-        get { return _orientation; }
-        set { _orientation = value; }
-    }
-    public override OMV.Quaternion Orientation {
-        get {
-            /* NOTE: this refetch is not necessary. The simulator knows about linkset children
-             *    and does not fetch this position info for children. Thus this is commented out.
-            // Children move around because tied to parent. Get a fresh value.
-            if (!Linkset.IsRoot(this))
-            {
-                _orientation = Linkset.OrientationGet(this);
-            }
-             */
-            return _orientation;
-        }
-        set {
-            if (_orientation == value)
-                return;
-            _orientation = value;
-
-            // A linkset might need to know if a component information changed.
-            Linkset.UpdateProperties(this, false);
-
-            PhysicsScene.TaintedObject("BSPrim.setOrientation", delegate()
-            {
-                if (PhysBody.HasPhysicalBody)
-                {
-                    // _position = PhysicsScene.PE.GetObjectPosition(PhysicsScene.World, BSBody);
-                    // DetailLog("{0},BSPrim.setOrientation,taint,pos={1},orient={2}", LocalID, _position, _orientation);
-                    PhysicsScene.PE.SetTranslation(PhysBody, _position, _orientation);
-                }
-            });
-        }
-    }
-    // Go directly to Bullet to get/set the value.
-    public override OMV.Quaternion ForceOrientation
-    {
-        get
-        {
-            _orientation = PhysicsScene.PE.GetOrientation(PhysBody);
-            return _orientation;
-        }
-        set
-        {
-            _orientation = value;
-            PhysicsScene.PE.SetTranslation(PhysBody, _position, _orientation);
-        }
-    }
-    public override int PhysicsActorType {
-        get { return _physicsActorType; }
-        set { _physicsActorType = value; }
-    }
-    public override bool IsPhysical {
-        get { return _isPhysical; }
-        set {
-            if (_isPhysical != value)
-            {
-                _isPhysical = value;
-                PhysicsScene.TaintedObject("BSPrim.setIsPhysical", delegate()
-                {
-                    DetailLog("{0},setIsPhysical,taint,isPhys={1}", LocalID, _isPhysical);
-                    SetObjectDynamic(true);
-                    // whether phys-to-static or static-to-phys, the object is not moving.
-                    ZeroMotion(true);
-                });
-            }
-        }
-    }
-
-    // An object is static (does not move) if selected or not physical
-    public override bool IsStatic
-    {
-        get { return _isSelected || !IsPhysical; }
-    }
-
-    // An object is solid if it's not phantom and if it's not doing VolumeDetect
-    public override bool IsSolid
-    {
-        get { return !IsPhantom && !_isVolumeDetect; }
-    }
-
-    // Make gravity work if the object is physical and not selected
-    // Called at taint-time!!
-    private void SetObjectDynamic(bool forceRebuild)
-    {
-        // Recreate the physical object if necessary
-        CreateGeomAndObject(forceRebuild);
-    }
-
-    // Convert the simulator's physical properties into settings on BulletSim objects.
-    // There are four flags we're interested in:
-    //     IsStatic: Object does not move, otherwise the object has mass and moves
-    //     isSolid: other objects bounce off of this object
-    //     isVolumeDetect: other objects pass through but can generate collisions
-    //     collisionEvents: whether this object returns collision events
-    private void UpdatePhysicalParameters()
-    {
-        // DetailLog("{0},BSPrim.UpdatePhysicalParameters,entry,body={1},shape={2}", LocalID, BSBody, BSShape);
-
-        // Mangling all the physical properties requires the object not be in the physical world.
-        // This is a NOOP if the object is not in the world (BulletSim and Bullet ignore objects not found).
-        PhysicsScene.PE.RemoveObjectFromWorld(PhysicsScene.World, PhysBody);
-
-        // Set up the object physicalness (does gravity and collisions move this object)
-        MakeDynamic(IsStatic);
-
-        // Update vehicle specific parameters (after MakeDynamic() so can change physical parameters)
-        _vehicle.Refresh();
-
-        // Arrange for collision events if the simulator wants them
-        EnableCollisions(SubscribedEvents());
-
-        // Make solid or not (do things bounce off or pass through this object).
-        MakeSolid(IsSolid);
-
-        AddObjectToPhysicalWorld();
-
-        // Rebuild its shape
-        PhysicsScene.PE.UpdateSingleAabb(PhysicsScene.World, PhysBody);
-
-        // Recompute any linkset parameters.
-        // When going from non-physical to physical, this re-enables the constraints that
-        //     had been automatically disabled when the mass was set to zero.
-        // For compound based linksets, this enables and disables interactions of the children.
-        Linkset.Refresh(this);
-
-        DetailLog("{0},BSPrim.UpdatePhysicalParameters,taintExit,static={1},solid={2},mass={3},collide={4},cf={5:X},cType={6},body={7},shape={8}",
-                        LocalID, IsStatic, IsSolid, Mass, SubscribedEvents(), CurrentCollisionFlags, PhysBody.collisionType, PhysBody, PhysShape);
-    }
-
-    // "Making dynamic" means changing to and from static.
-    // When static, gravity does not effect the object and it is fixed in space.
-    // When dynamic, the object can fall and be pushed by others.
-    // This is independent of its 'solidness' which controls what passes through
-    //    this object and what interacts with it.
-    private void MakeDynamic(bool makeStatic)
-    {
-        if (makeStatic)
-        {
-            // Become a Bullet 'static' object type
-            CurrentCollisionFlags = PhysicsScene.PE.AddToCollisionFlags(PhysBody, CollisionFlags.CF_STATIC_OBJECT);
-            // Stop all movement
-            ZeroMotion(true);
-
-            // Set various physical properties so other object interact properly
-            MaterialAttributes matAttrib = BSMaterials.GetAttributes(Material, false);
-            PhysicsScene.PE.SetFriction(PhysBody, matAttrib.friction);
-            PhysicsScene.PE.SetRestitution(PhysBody, matAttrib.restitution);
-
-            // Mass is zero which disables a bunch of physics stuff in Bullet
-            UpdatePhysicalMassProperties(0f, false);
-            // Set collision detection parameters
-            if (BSParam.CcdMotionThreshold > 0f)
-            {
-                PhysicsScene.PE.SetCcdMotionThreshold(PhysBody, BSParam.CcdMotionThreshold);
-                PhysicsScene.PE.SetCcdSweptSphereRadius(PhysBody, BSParam.CcdSweptSphereRadius);
-            }
-
-            // The activation state is 'disabled' so Bullet will not try to act on it.
-            // PhysicsScene.PE.ForceActivationState(PhysBody, ActivationState.DISABLE_SIMULATION);
-            // Start it out sleeping and physical actions could wake it up.
-            PhysicsScene.PE.ForceActivationState(PhysBody, ActivationState.ISLAND_SLEEPING);
-
-            // This collides like a static object
-            PhysBody.collisionType = CollisionType.Static;
-
-            // There can be special things needed for implementing linksets
-            Linkset.MakeStatic(this);
-        }
-        else
-        {
-            // Not a Bullet static object
-            CurrentCollisionFlags = PhysicsScene.PE.RemoveFromCollisionFlags(PhysBody, CollisionFlags.CF_STATIC_OBJECT);
-
-            // Set various physical properties so other object interact properly
-            MaterialAttributes matAttrib = BSMaterials.GetAttributes(Material, true);
-            PhysicsScene.PE.SetFriction(PhysBody, matAttrib.friction);
-            PhysicsScene.PE.SetRestitution(PhysBody, matAttrib.restitution);
-
-            // per http://www.bulletphysics.org/Bullet/phpBB3/viewtopic.php?t=3382
-            // Since this can be called multiple times, only zero forces when becoming physical
-            // PhysicsScene.PE.ClearAllForces(BSBody);
-
-            // For good measure, make sure the transform is set through to the motion state
-            PhysicsScene.PE.SetTranslation(PhysBody, _position, _orientation);
-
-            // Center of mass is at the center of the object
-            // DEBUG DEBUG PhysicsScene.PE.SetCenterOfMassByPosRot(Linkset.LinksetRoot.PhysBody, _position, _orientation);
-
-            // A dynamic object has mass
-            UpdatePhysicalMassProperties(RawMass, false);
-
-            // Set collision detection parameters
-            if (BSParam.CcdMotionThreshold > 0f)
-            {
-                PhysicsScene.PE.SetCcdMotionThreshold(PhysBody, BSParam.CcdMotionThreshold);
-                PhysicsScene.PE.SetCcdSweptSphereRadius(PhysBody, BSParam.CcdSweptSphereRadius);
-            }
-
-            // Various values for simulation limits
-            PhysicsScene.PE.SetDamping(PhysBody, BSParam.LinearDamping, BSParam.AngularDamping);
-            PhysicsScene.PE.SetDeactivationTime(PhysBody, BSParam.DeactivationTime);
-            PhysicsScene.PE.SetSleepingThresholds(PhysBody, BSParam.LinearSleepingThreshold, BSParam.AngularSleepingThreshold);
-            PhysicsScene.PE.SetContactProcessingThreshold(PhysBody, BSParam.ContactProcessingThreshold);
-
-            // This collides like an object.
-            PhysBody.collisionType = CollisionType.Dynamic;
-
-            // Force activation of the object so Bullet will act on it.
-            // Must do the ForceActivationState2() to overcome the DISABLE_SIMULATION from static objects.
-            PhysicsScene.PE.ForceActivationState(PhysBody, ActivationState.ACTIVE_TAG);
-
-            // There might be special things needed for implementing linksets.
-            Linkset.MakeDynamic(this);
-        }
-    }
-
-    // "Making solid" means that other object will not pass through this object.
-    // To make transparent, we create a Bullet ghost object.
-    // Note: This expects to be called from the UpdatePhysicalParameters() routine as
-    //     the functions after this one set up the state of a possibly newly created collision body.
-    private void MakeSolid(bool makeSolid)
-    {
-        CollisionObjectTypes bodyType = (CollisionObjectTypes)PhysicsScene.PE.GetBodyType(PhysBody);
-        if (makeSolid)
-        {
-            // Verify the previous code created the correct shape for this type of thing.
-            if ((bodyType & CollisionObjectTypes.CO_RIGID_BODY) == 0)
-            {
-                m_log.ErrorFormat("{0} MakeSolid: physical body of wrong type for solidity. id={1}, type={2}", LogHeader, LocalID, bodyType);
-            }
-            CurrentCollisionFlags = PhysicsScene.PE.RemoveFromCollisionFlags(PhysBody, CollisionFlags.CF_NO_CONTACT_RESPONSE);
-        }
-        else
-        {
-            if ((bodyType & CollisionObjectTypes.CO_GHOST_OBJECT) == 0)
-            {
-                m_log.ErrorFormat("{0} MakeSolid: physical body of wrong type for non-solidness. id={1}, type={2}", LogHeader, LocalID, bodyType);
-            }
-            CurrentCollisionFlags = PhysicsScene.PE.AddToCollisionFlags(PhysBody, CollisionFlags.CF_NO_CONTACT_RESPONSE);
-
-            // Change collision info from a static object to a ghosty collision object
-            PhysBody.collisionType = CollisionType.VolumeDetect;
-        }
-    }
-
-    // Enable physical actions. Bullet will keep sleeping non-moving physical objects so
-    //     they need waking up when parameters are changed.
-    // Called in taint-time!!
-    private void ActivateIfPhysical(bool forceIt)
-    {
-        if (IsPhysical && PhysBody.HasPhysicalBody)
-            PhysicsScene.PE.Activate(PhysBody, forceIt);
-    }
-
-    // Turn on or off the flag controlling whether collision events are returned to the simulator.
-    private void EnableCollisions(bool wantsCollisionEvents)
-    {
-        if (wantsCollisionEvents)
-        {
-            CurrentCollisionFlags = PhysicsScene.PE.AddToCollisionFlags(PhysBody, CollisionFlags.BS_SUBSCRIBE_COLLISION_EVENTS);
-        }
-        else
-        {
-            CurrentCollisionFlags = PhysicsScene.PE.RemoveFromCollisionFlags(PhysBody, CollisionFlags.BS_SUBSCRIBE_COLLISION_EVENTS);
-        }
-    }
-
-    // Add me to the physical world.
-    // Object MUST NOT already be in the world.
-    // This routine exists because some assorted properties get mangled by adding to the world.
-    internal void AddObjectToPhysicalWorld()
-    {
-        if (PhysBody.HasPhysicalBody)
-        {
-            PhysicsScene.PE.AddObjectToWorld(PhysicsScene.World, PhysBody);
-        }
-        else
-        {
-            m_log.ErrorFormat("{0} Attempt to add physical object without body. id={1}", LogHeader, LocalID);
-            DetailLog("{0},BSPrim.UpdatePhysicalParameters,addObjectWithoutBody,cType={1}", LocalID, PhysBody.collisionType);
-        }
-    }
-
-    // prims don't fly
-    public override bool Flying {
-        get { return _flying; }
-        set {
-            _flying = value;
-        }
-    }
-    public override bool SetAlwaysRun {
-        get { return _setAlwaysRun; }
-        set { _setAlwaysRun = value; }
-    }
-    public override bool ThrottleUpdates {
-        get { return _throttleUpdates; }
-        set { _throttleUpdates = value; }
-    }
-    public bool IsPhantom {
-        get {
-            // SceneObjectPart removes phantom objects from the physics scene
-            // so, although we could implement touching and such, we never
-            // are invoked as a phantom object
-            return false;
-        }
-    }
-    public override bool FloatOnWater {
-        set {
-            _floatOnWater = value;
-            PhysicsScene.TaintedObject("BSPrim.setFloatOnWater", delegate()
-            {
-                if (_floatOnWater)
-                    CurrentCollisionFlags = PhysicsScene.PE.AddToCollisionFlags(PhysBody, CollisionFlags.BS_FLOATS_ON_WATER);
-                else
-                    CurrentCollisionFlags = PhysicsScene.PE.RemoveFromCollisionFlags(PhysBody, CollisionFlags.BS_FLOATS_ON_WATER);
-            });
-        }
-    }
-    public override OMV.Vector3 RotationalVelocity {
-        get {
-            return _rotationalVelocity;
-        }
-        set {
-            _rotationalVelocity = value;
-            // m_log.DebugFormat("{0}: RotationalVelocity={1}", LogHeader, _rotationalVelocity);
-            PhysicsScene.TaintedObject("BSPrim.setRotationalVelocity", delegate()
-            {
-                DetailLog("{0},BSPrim.SetRotationalVel,taint,rotvel={1}", LocalID, _rotationalVelocity);
-                ForceRotationalVelocity = _rotationalVelocity;
-            });
-        }
-    }
-    public override OMV.Vector3 ForceRotationalVelocity {
-        get {
-            return _rotationalVelocity;
-        }
-        set {
-            _rotationalVelocity = value;
-            if (PhysBody.HasPhysicalBody)
-            {
-                PhysicsScene.PE.SetAngularVelocity(PhysBody, _rotationalVelocity);
-                ActivateIfPhysical(false);
-            }
-        }
-    }
-    public override bool Kinematic {
-        get { return _kinematic; }
-        set { _kinematic = value;
-            // m_log.DebugFormat("{0}: Kinematic={1}", LogHeader, _kinematic);
-        }
-    }
-    public override float Buoyancy {
-        get { return _buoyancy; }
-        set {
-            _buoyancy = value;
-            PhysicsScene.TaintedObject("BSPrim.setBuoyancy", delegate()
-            {
-                ForceBuoyancy = _buoyancy;
-            });
-        }
-    }
-    public override float ForceBuoyancy {
-        get { return _buoyancy; }
-        set {
-            _buoyancy = value;
-            // DetailLog("{0},BSPrim.setForceBuoyancy,taint,buoy={1}", LocalID, _buoyancy);
-            // Force the recalculation of the various inertia,etc variables in the object
-            DetailLog("{0},BSPrim.ForceBuoyancy,buoy={1},mass={2}", LocalID, _buoyancy, _mass);
-            UpdatePhysicalMassProperties(_mass, true);
-            ActivateIfPhysical(false);
-        }
-    }
-
-    // Used for MoveTo
-    public override OMV.Vector3 PIDTarget {
-        set { _PIDTarget = value; }
-    }
-    public override float PIDTau {
-        set { _PIDTau = value; }
-    }
-    public override bool PIDActive {
-        set { _usePID = value; }
-    }
-
-    // Used for llSetHoverHeight and maybe vehicle height
-    // Hover Height will override MoveTo target's Z
-    public override bool PIDHoverActive {
-        set { _useHoverPID = value; }
-    }
-    public override float PIDHoverHeight {
-        set { _PIDHoverHeight = value; }
-    }
-    public override PIDHoverType PIDHoverType {
-        set { _PIDHoverType = value; }
-    }
-    public override float PIDHoverTau {
-        set { _PIDHoverTao = value; }
-    }
-
-    // For RotLookAt
-    public override OMV.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 AddForce(OMV.Vector3 force, bool pushforce) {
-        // Since this force is being applied in only one step, make this a force per second.
-        OMV.Vector3 addForce = force / PhysicsScene.LastTimeStep;
-        AddForce(addForce, pushforce, false);
-    }
-    // Applying a force just adds this to the total force on the object.
-    // This added force will only last the next simulation tick.
-    public void AddForce(OMV.Vector3 force, bool pushforce, bool inTaintTime) {
-        // for an object, doesn't matter if force is a pushforce or not
-        if (force.IsFinite())
-        {
-            float magnitude = force.Length();
-            if (magnitude > BSParam.MaxAddForceMagnitude)
-            {
-                // Force has a limit
-                force = force / magnitude * BSParam.MaxAddForceMagnitude;
-            }
-
-            OMV.Vector3 addForce = force;
-            DetailLog("{0},BSPrim.addForce,call,force={1}", LocalID, addForce);
-
-            PhysicsScene.TaintedObject(inTaintTime, "BSPrim.AddForce", delegate()
-            {
-                // Bullet adds this central force to the total force for this tick
-                DetailLog("{0},BSPrim.addForce,taint,force={1}", LocalID, addForce);
-                if (PhysBody.HasPhysicalBody)
-                {
-                    PhysicsScene.PE.ApplyCentralForce(PhysBody, addForce);
-                    ActivateIfPhysical(false);
-                }
-            });
-        }
-        else
-        {
-            m_log.WarnFormat("{0}: Got a NaN force applied to a prim. LocalID={1}", LogHeader, LocalID);
-            return;
-        }
-    }
-
-    public override void AddAngularForce(OMV.Vector3 force, bool pushforce) {
-        AddAngularForce(force, pushforce, false);
-    }
-    public void AddAngularForce(OMV.Vector3 force, bool pushforce, bool inTaintTime)
-    {
-        if (force.IsFinite())
-        {
-            OMV.Vector3 angForce = force;
-            PhysicsScene.TaintedObject(inTaintTime, "BSPrim.AddAngularForce", delegate()
-            {
-                if (PhysBody.HasPhysicalBody)
-                {
-                    PhysicsScene.PE.ApplyTorque(PhysBody, angForce);
-                    ActivateIfPhysical(false);
-                }
-            });
-        }
-        else
-        {
-            m_log.WarnFormat("{0}: Got a NaN force applied to a prim. LocalID={1}", LogHeader, LocalID);
-            return;
-        }
-    }
-
-    // A torque impulse.
-    // ApplyTorqueImpulse adds torque directly to the angularVelocity.
-    // AddAngularForce accumulates the force and applied it to the angular velocity all at once.
-    // Computed as: angularVelocity += impulse * inertia;
-    public void ApplyTorqueImpulse(OMV.Vector3 impulse, bool inTaintTime)
-    {
-        OMV.Vector3 applyImpulse = impulse;
-        PhysicsScene.TaintedObject(inTaintTime, "BSPrim.ApplyTorqueImpulse", delegate()
-        {
-            if (PhysBody.HasPhysicalBody)
-            {
-                PhysicsScene.PE.ApplyTorqueImpulse(PhysBody, applyImpulse);
-                ActivateIfPhysical(false);
-            }
-        });
-    }
-
-    public override void SetMomentum(OMV.Vector3 momentum) {
-        // DetailLog("{0},BSPrim.SetMomentum,call,mom={1}", LocalID, momentum);
-    }
-    #region Mass Calculation
-
-    private float CalculateMass()
-    {
-        float volume = _size.X * _size.Y * _size.Z; // default
-        float tmp;
-
-        float returnMass = 0;
-        float hollowAmount = (float)BaseShape.ProfileHollow * 2.0e-5f;
-        float hollowVolume = hollowAmount * hollowAmount;
-
-        switch (BaseShape.ProfileShape)
-        {
-            case ProfileShape.Square:
-                // default box
-
-                if (BaseShape.PathCurve == (byte)Extrusion.Straight)
-                    {
-                    if (hollowAmount > 0.0)
-                        {
-                        switch (BaseShape.HollowShape)
-                            {
-                            case HollowShape.Square:
-                            case HollowShape.Same:
-                                break;
-
-                            case HollowShape.Circle:
-
-                                hollowVolume *= 0.78539816339f;
-                                break;
-
-                            case HollowShape.Triangle:
-
-                                hollowVolume *= (0.5f * .5f);
-                                break;
-
-                            default:
-                                hollowVolume = 0;
-                                break;
-                            }
-                        volume *= (1.0f - hollowVolume);
-                        }
-                    }
-
-                else if (BaseShape.PathCurve == (byte)Extrusion.Curve1)
-                    {
-                    //a tube
-
-                    volume *= 0.78539816339e-2f * (float)(200 - BaseShape.PathScaleX);
-                    tmp= 1.0f -2.0e-2f * (float)(200 - BaseShape.PathScaleY);
-                    volume -= volume*tmp*tmp;
-
-                    if (hollowAmount > 0.0)
-                        {
-                        hollowVolume *= hollowAmount;
-
-                        switch (BaseShape.HollowShape)
-                            {
-                            case HollowShape.Square:
-                            case HollowShape.Same:
-                                break;
-
-                            case HollowShape.Circle:
-                                hollowVolume *= 0.78539816339f;;
-                                break;
-
-                            case HollowShape.Triangle:
-                                hollowVolume *= 0.5f * 0.5f;
-                                break;
-                            default:
-                                hollowVolume = 0;
-                                break;
-                            }
-                        volume *= (1.0f - hollowVolume);
-                        }
-                    }
-
-                break;
-
-            case ProfileShape.Circle:
-
-                if (BaseShape.PathCurve == (byte)Extrusion.Straight)
-                    {
-                    volume *= 0.78539816339f; // elipse base
-
-                    if (hollowAmount > 0.0)
-                        {
-                        switch (BaseShape.HollowShape)
-                            {
-                            case HollowShape.Same:
-                            case HollowShape.Circle:
-                                break;
-
-                            case HollowShape.Square:
-                                hollowVolume *= 0.5f * 2.5984480504799f;
-                                break;
-
-                            case HollowShape.Triangle:
-                                hollowVolume *= .5f * 1.27323954473516f;
-                                break;
-
-                            default:
-                                hollowVolume = 0;
-                                break;
-                            }
-                        volume *= (1.0f - hollowVolume);
-                        }
-                    }
-
-                else if (BaseShape.PathCurve == (byte)Extrusion.Curve1)
-                    {
-                    volume *= 0.61685027506808491367715568749226e-2f * (float)(200 - BaseShape.PathScaleX);
-                    tmp = 1.0f - .02f * (float)(200 - BaseShape.PathScaleY);
-                    volume *= (1.0f - tmp * tmp);
-
-                    if (hollowAmount > 0.0)
-                        {
-
-                        // calculate the hollow volume by it's shape compared to the prim shape
-                        hollowVolume *= hollowAmount;
-
-                        switch (BaseShape.HollowShape)
-                            {
-                            case HollowShape.Same:
-                            case HollowShape.Circle:
-                                break;
-
-                            case HollowShape.Square:
-                                hollowVolume *= 0.5f * 2.5984480504799f;
-                                break;
-
-                            case HollowShape.Triangle:
-                                hollowVolume *= .5f * 1.27323954473516f;
-                                break;
-
-                            default:
-                                hollowVolume = 0;
-                                break;
-                            }
-                        volume *= (1.0f - hollowVolume);
-                        }
-                    }
-                break;
-
-            case ProfileShape.HalfCircle:
-                if (BaseShape.PathCurve == (byte)Extrusion.Curve1)
-                {
-                volume *= 0.52359877559829887307710723054658f;
-                }
-                break;
-
-            case ProfileShape.EquilateralTriangle:
-
-                if (BaseShape.PathCurve == (byte)Extrusion.Straight)
-                    {
-                    volume *= 0.32475953f;
-
-                    if (hollowAmount > 0.0)
-                        {
-
-                        // calculate the hollow volume by it's shape compared to the prim shape
-                        switch (BaseShape.HollowShape)
-                            {
-                            case HollowShape.Same:
-                            case HollowShape.Triangle:
-                                hollowVolume *= .25f;
-                                break;
-
-                            case HollowShape.Square:
-                                hollowVolume *= 0.499849f * 3.07920140172638f;
-                                break;
-
-                            case HollowShape.Circle:
-                                // Hollow shape is a perfect cyllinder in respect to the cube's scale
-                                // Cyllinder hollow volume calculation
-
-                                hollowVolume *= 0.1963495f * 3.07920140172638f;
-                                break;
-
-                            default:
-                                hollowVolume = 0;
-                                break;
-                            }
-                        volume *= (1.0f - hollowVolume);
-                        }
-                    }
-                else if (BaseShape.PathCurve == (byte)Extrusion.Curve1)
-                    {
-                    volume *= 0.32475953f;
-                    volume *= 0.01f * (float)(200 - BaseShape.PathScaleX);
-                    tmp = 1.0f - .02f * (float)(200 - BaseShape.PathScaleY);
-                    volume *= (1.0f - tmp * tmp);
-
-                    if (hollowAmount > 0.0)
-                        {
-
-                        hollowVolume *= hollowAmount;
-
-                        switch (BaseShape.HollowShape)
-                            {
-                            case HollowShape.Same:
-                            case HollowShape.Triangle:
-                                hollowVolume *= .25f;
-                                break;
-
-                            case HollowShape.Square:
-                                hollowVolume *= 0.499849f * 3.07920140172638f;
-                                break;
-
-                            case HollowShape.Circle:
-
-                                hollowVolume *= 0.1963495f * 3.07920140172638f;
-                                break;
-
-                            default:
-                                hollowVolume = 0;
-                                break;
-                            }
-                        volume *= (1.0f - hollowVolume);
-                        }
-                    }
-                    break;
-
-            default:
-                break;
-            }
-
-
-
-        float taperX1;
-        float taperY1;
-        float taperX;
-        float taperY;
-        float pathBegin;
-        float pathEnd;
-        float profileBegin;
-        float profileEnd;
-
-        if (BaseShape.PathCurve == (byte)Extrusion.Straight || BaseShape.PathCurve == (byte)Extrusion.Flexible)
-            {
-            taperX1 = BaseShape.PathScaleX * 0.01f;
-            if (taperX1 > 1.0f)
-                taperX1 = 2.0f - taperX1;
-            taperX = 1.0f - taperX1;
-
-            taperY1 = BaseShape.PathScaleY * 0.01f;
-            if (taperY1 > 1.0f)
-                taperY1 = 2.0f - taperY1;
-            taperY = 1.0f - taperY1;
-            }
-        else
-            {
-            taperX = BaseShape.PathTaperX * 0.01f;
-            if (taperX < 0.0f)
-                taperX = -taperX;
-            taperX1 = 1.0f - taperX;
-
-            taperY = BaseShape.PathTaperY * 0.01f;
-            if (taperY < 0.0f)
-                taperY = -taperY;
-            taperY1 = 1.0f - taperY;
-
-            }
-
-
-        volume *= (taperX1 * taperY1 + 0.5f * (taperX1 * taperY + taperX * taperY1) + 0.3333333333f * taperX * taperY);
-
-        pathBegin = (float)BaseShape.PathBegin * 2.0e-5f;
-        pathEnd = 1.0f - (float)BaseShape.PathEnd * 2.0e-5f;
-        volume *= (pathEnd - pathBegin);
-
-        // this is crude aproximation
-        profileBegin = (float)BaseShape.ProfileBegin * 2.0e-5f;
-        profileEnd = 1.0f - (float)BaseShape.ProfileEnd * 2.0e-5f;
-        volume *= (profileEnd - profileBegin);
-
-        returnMass = _density * volume;
-
-        /* Comment out code that computes the mass of the linkset. That is done in the Linkset class.
-        if (IsRootOfLinkset)
-        {
-            foreach (BSPrim prim in _childrenPrims)
-            {
-                returnMass += prim.CalculateMass();
-            }
-        }
-         */
-
-        returnMass = Util.Clamp(returnMass, BSParam.MinimumObjectMass, BSParam.MaximumObjectMass);
-
-        return returnMass;
-    }// end CalculateMass
-    #endregion Mass Calculation
-
-    // Rebuild the geometry and object.
-    // This is called when the shape changes so we need to recreate the mesh/hull.
-    // Called at taint-time!!!
-    public void CreateGeomAndObject(bool forceRebuild)
-    {
-        // If this prim is part of a linkset, we must remove and restore the physical
-        //    links if the body is rebuilt.
-        bool needToRestoreLinkset = false;
-        bool needToRestoreVehicle = false;
-
-        // Create the correct physical representation for this type of object.
-        // Updates PhysBody and PhysShape with the new information.
-        // Ignore 'forceRebuild'. This routine makes the right choices and changes of necessary.
-        PhysicsScene.Shapes.GetBodyAndShape(false, PhysicsScene.World, this, null, delegate(BulletBody dBody)
-        {
-            // Called if the current prim body is about to be destroyed.
-            // Remove all the physical dependencies on the old body.
-            // (Maybe someday make the changing of BSShape an event to be subscribed to by BSLinkset, ...)
-            needToRestoreLinkset = Linkset.RemoveBodyDependencies(this);
-            needToRestoreVehicle = _vehicle.RemoveBodyDependencies(this);
-        });
-
-        if (needToRestoreLinkset)
-        {
-            // If physical body dependencies were removed, restore them
-            Linkset.RestoreBodyDependencies(this);
-        }
-        if (needToRestoreVehicle)
-        {
-            // If physical body dependencies were removed, restore them
-            _vehicle.RestoreBodyDependencies(this);
-        }
-
-        // Make sure the properties are set on the new object
-        UpdatePhysicalParameters();
-        return;
-    }
-
-    // The physics engine says that properties have updated. Update same and inform
-    // the world that things have changed.
-    // TODO: do we really need to check for changed? Maybe just copy values and call RequestPhysicsterseUpdate()
-    enum UpdatedProperties {
-        Position      = 1 << 0,
-        Rotation      = 1 << 1,
-        Velocity      = 1 << 2,
-        Acceleration  = 1 << 3,
-        RotationalVel = 1 << 4
-    }
-
-    const float ROTATION_TOLERANCE = 0.01f;
-    const float VELOCITY_TOLERANCE = 0.001f;
-    const float POSITION_TOLERANCE = 0.05f;
-    const float ACCELERATION_TOLERANCE = 0.01f;
-    const float ROTATIONAL_VELOCITY_TOLERANCE = 0.01f;
-
-    public override void UpdateProperties(EntityProperties entprop)
-    {
-        // Updates only for individual prims and for the root object of a linkset.
-        if (Linkset.IsRoot(this))
-        {
-            // A temporary kludge to suppress the rotational effects introduced on vehicles by Bullet
-            // TODO: handle physics introduced by Bullet with computed vehicle physics.
-            if (_vehicle.IsActive)
-            {
-                entprop.RotationalVelocity = OMV.Vector3.Zero;
-            }
-
-            // Assign directly to the local variables so the normal set action does not happen
-            _position = entprop.Position;
-            _orientation = entprop.Rotation;
-            _velocity = entprop.Velocity;
-            _acceleration = entprop.Acceleration;
-            _rotationalVelocity = entprop.RotationalVelocity;
-
-            // The sanity check can change the velocity and/or position.
-            if (IsPhysical && PositionSanityCheck(true))
-            {
-                entprop.Position = _position;
-                entprop.Velocity = _velocity;
-            }
-
-            OMV.Vector3 direction = OMV.Vector3.UnitX * _orientation;   // DEBUG DEBUG DEBUG
-            DetailLog("{0},BSPrim.UpdateProperties,call,pos={1},orient={2},dir={3},vel={4},rotVel={5}",
-                    LocalID, _position, _orientation, direction, _velocity, _rotationalVelocity);
-
-            // remember the current and last set values
-            LastEntityProperties = CurrentEntityProperties;
-            CurrentEntityProperties = entprop;
-
-            base.RequestPhysicsterseUpdate();
-        }
-            /*
-        else
-        {
-            // For debugging, report the movement of children
-            DetailLog("{0},BSPrim.UpdateProperties,child,pos={1},orient={2},vel={3},accel={4},rotVel={5}",
-                    LocalID, entprop.Position, entprop.Rotation, entprop.Velocity,
-                    entprop.Acceleration, entprop.RotationalVelocity);
-        }
-             */
-
-        // The linkset implimentation might want to know about this.
-        Linkset.UpdateProperties(this, true);
-    }
-}
-}