/*
 * 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.
 */

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Reflection;
using System.Runtime.Serialization;
using System.Security.Permissions;
using System.Xml;
using System.Xml.Serialization;
using log4net;
using OpenMetaverse;
using OpenMetaverse.Packets;
using OpenMetaverse.StructuredData;
using OpenSim.Framework;
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.Framework.Scenes.Scripting;
using OpenSim.Region.Framework.Scenes.Serialization;
using OpenSim.Region.Physics.Manager;
using System.IO;

namespace OpenSim.Region.Framework.Scenes
{
    #region Enumerations

    [Flags]
    public enum Changed : uint
    {
        INVENTORY = 1,
        COLOR = 2,
        SHAPE = 4,
        SCALE = 8,
        TEXTURE = 16,
        LINK = 32,
        ALLOWED_DROP = 64,
        OWNER = 128,
        REGION = 256,
        TELEPORT = 512,
        REGION_RESTART = 1024,
        MEDIA = 2048,
        ANIMATION = 16384
    }

    // I don't really know where to put this except here.
    // Can't access the OpenSim.Region.ScriptEngine.Common.LSL_BaseClass.Changed constants
    [Flags]
    public enum ExtraParamType
    {
        Something1 = 1,
        Something2 = 2,
        Something3 = 4,
        Something4 = 8,
        Flexible = 16,
        Light = 32,
        Sculpt = 48,
        Something5 = 64,
        Something6 = 128
    }

    [Flags]
    public enum TextureAnimFlags : byte
    {
        NONE = 0x00,
        ANIM_ON = 0x01,
        LOOP = 0x02,
        REVERSE = 0x04,
        PING_PONG = 0x08,
        SMOOTH = 0x10,
        ROTATE = 0x20,
        SCALE = 0x40
    }

    public enum PrimType : int
    {
        BOX = 0,
        CYLINDER = 1,
        PRISM = 2,
        SPHERE = 3,
        TORUS = 4,
        TUBE = 5,
        RING = 6,
        SCULPT = 7
    }

    #endregion Enumerations

    //public class SceneObjectPart : IScriptHost, ISceneEntity
    public abstract class SceneObjectPartBase : IScriptHost, ISceneEntity
    {
        /// <value>
        /// Denote all sides of the prim
        /// </value>
        public const int ALL_SIDES = -1;
        
        protected static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        /// <value>
        /// Is this sop a root part?
        /// </value>
        
        public bool IsRoot 
        {
           get { return ParentGroup.RootPart == this; } 
        }

        #region Fields

        //DSG SYNC
        //public bool AllowedDrop;
        private bool m_allowedDrop;
        public bool AllowedDrop
        {
            get { return m_allowedDrop; }
            set
            {
                m_allowedDrop = value;
            }
        }

        
        public bool DIE_AT_EDGE;

        
        public bool RETURN_AT_EDGE;

        
        public bool BlockGrab;

        
        public bool StatusSandbox;

        
        public Vector3 StatusSandboxPos;

        // TODO: This needs to be persisted in next XML version update!
        
        public readonly int[] PayPrice = {-2,-2,-2,-2,-2};
        
        
        public PhysicsActor PhysActor
        {
            get { return m_physActor; }
            set
            {
                //m_log.DebugFormat("[SCENE OBJECT PART]: PhysActor set to {0} for {1} {2}", value, Name, UUID);
                m_physActor = value;
            }
        }

        //Xantor 20080528 Sound stuff:
        //  Note: This isn't persisted in the database right now, as the fields for that aren't just there yet.
        //        Not a big problem as long as the script that sets it remains in the prim on startup.
        //        for SL compatibility it should be persisted though (set sound / displaytext / particlesystem, kill script)
        
        public UUID Sound;
        
        
        public byte SoundFlags;
        
        
        public double SoundGain;
        
        
        public double SoundRadius;
        
        
        public uint TimeStampFull;
        
        
        public uint TimeStampLastActivity; // Will be used for AutoReturn
        
        
        public uint TimeStampTerse;

        
        public UUID FromItemID;

        
        public UUID FromFolderID;

        
        public int STATUS_ROTATE_X;

        
        public int STATUS_ROTATE_Y;

        
        public int STATUS_ROTATE_Z;
        
        
        private Dictionary<int, string> m_CollisionFilter = new Dictionary<int, string>();
               
        /// <value>
        /// The UUID of the user inventory item from which this object was rezzed if this is a root part.
        /// If UUID.Zero then either this is not a root part or there is no connection with a user inventory item.
        /// </value>
        private UUID m_fromUserInventoryItemID;
        
        
        public UUID FromUserInventoryItemID
        {
            get { return m_fromUserInventoryItemID; }
        }

        
        //public bool IsAttachment;
        private bool m_isAttachment;
        public bool IsAttachment
        {
            get { return m_isAttachment; }
            set { m_isAttachment = value; }
        }

        
        //public scriptEvents AggregateScriptEvents;
        private scriptEvents m_aggregateScriptEvents;
        public scriptEvents AggregateScriptEvents
        {
            get { return m_aggregateScriptEvents; }
            set { m_aggregateScriptEvents = value; }
        }
        
        
        //public UUID AttachedAvatar;
        private UUID m_attachedAvatar;
        public UUID AttachedAvatar
        {
            get { return m_attachedAvatar; }
            set { m_attachedAvatar = value; }
        }

        
        //public Vector3 AttachedPos;
        private Vector3 m_attachedPos;
        public Vector3 AttachedPos
        {
            get { return m_attachedPos; }
            set { m_attachedPos = value; }
        }

        
        //public uint AttachmentPoint;
        private uint m_attachmentPoint;
        public uint AttachmentPoint
        {
            get { return m_attachmentPoint; }
            set { m_attachmentPoint = value; }
        }

        
        public Vector3 RotationAxis = Vector3.One;

        
        public bool VolumeDetectActive; // XmlIgnore set to avoid problems with persistance until I come to care for this
                                        // Certainly this must be a persistant setting finally

        
        public bool IsWaitingForFirstSpinUpdatePacket;

        
        public Quaternion SpinOldOrientation = Quaternion.Identity;

        
        public Quaternion m_APIDTarget = Quaternion.Identity;

        
        public float m_APIDDamp = 0;

        
        public float m_APIDStrength = 0;

        /// <summary>
        /// This part's inventory
        /// </summary>
        
        public IEntityInventory Inventory
        {
            get { return m_inventory; }
        }
        //protected SceneObjectPartInventory m_inventory;
        protected SceneObjectPartInventoryBase m_inventory;

        
        public bool Undoing;

        
        public bool IgnoreUndoUpdate = false;

        public PrimFlags LocalFlags;
        private float m_damage = -1.0f;
        private byte[] m_TextureAnimation;
        private byte m_clickAction;
        private Color m_color = Color.Black;
        private string m_description = String.Empty;
        private readonly List<uint> m_lastColliders = new List<uint>();
        private int m_linkNum;
        
        private int m_scriptAccessPin;
        
        private readonly Dictionary<UUID, scriptEvents> m_scriptEvents = new Dictionary<UUID, scriptEvents>();
        private string m_sitName = String.Empty;
        private Quaternion m_sitTargetOrientation = Quaternion.Identity;
        private Vector3 m_sitTargetPosition;
        private string m_sitAnimation = "SIT";
        private string m_text = String.Empty;
        private string m_touchName = String.Empty;
        private readonly UndoStack<UndoState> m_undo = new UndoStack<UndoState>(5);
        private readonly UndoStack<UndoState> m_redo = new UndoStack<UndoState>(5);
        private UUID _creatorID;

        private bool m_passTouches;

        /// <summary>
        /// Only used internally to schedule client updates.
        /// 0 - no update is scheduled
        /// 1 - terse update scheduled
        /// 2 - full update scheduled
        ///
        /// TODO - This should be an enumeration
        /// </summary>
        //private byte m_updateFlag;
        protected byte m_updateFlag;

        private PhysicsActor m_physActor;
        protected Vector3 m_acceleration;
        protected Vector3 m_angularVelocity;

        //unkown if this will be kept, added as a way of removing the group position from the group class
        protected Vector3 m_groupPosition;
        protected uint m_localId;
        protected Material m_material = OpenMetaverse.Material.Wood;
        protected string m_name;
        protected Vector3 m_offsetPosition;

        // FIXME, TODO, ERROR: 'ParentGroup' can't be in here, move it out.
        protected SceneObjectGroup m_parentGroup;
        protected byte[] m_particleSystem = Utils.EmptyBytes;
        protected ulong m_regionHandle;
        protected Quaternion m_rotationOffset = Quaternion.Identity;
        protected PrimitiveBaseShape m_shape;
        protected UUID m_uuid;
        protected Vector3 m_velocity;

        protected Vector3 m_lastPosition;
        protected Quaternion m_lastRotation;
        protected Vector3 m_lastVelocity;
        protected Vector3 m_lastAcceleration;
        protected Vector3 m_lastAngularVelocity;
        protected int m_lastTerseSent;
        
        /// <summary>
        /// Stores media texture data
        /// </summary>
        protected string m_mediaUrl;

        // TODO: Those have to be changed into persistent properties at some later point,
        // or sit-camera on vehicles will break on sim-crossing.
        private Vector3 m_cameraEyeOffset;
        private Vector3 m_cameraAtOffset;
        private bool m_forceMouselook;

        // TODO: Collision sound should have default.
        //private UUID m_collisionSound;
        protected UUID m_collisionSound;
        private float m_collisionSoundVolume;

        #endregion Fields

        #region Constructors

        /// <summary>
        /// No arg constructor called by region restore db code
        /// </summary>
        //public SceneObjectPart()
        public SceneObjectPartBase()
        {
            // It's not necessary to persist this
            m_TextureAnimation = Utils.EmptyBytes;
            m_particleSystem = Utils.EmptyBytes;
            Rezzed = DateTime.UtcNow;
            
            //m_inventory = new SceneObjectPartInventory(this);
            m_inventory = new SceneObjectPartInventoryBase(this);
        }

        /// <summary>
        /// Create a completely new SceneObjectPart (prim).  This will need to be added separately to a SceneObjectGroup
        /// </summary>
        /// <param name="ownerID"></param>
        /// <param name="shape"></param>
        /// <param name="position"></param>
        /// <param name="rotationOffset"></param>
        /// <param name="offsetPosition"></param>
        //public SceneObjectPart(
        public SceneObjectPartBase(
            UUID ownerID, PrimitiveBaseShape shape, Vector3 groupPosition, 
            Quaternion rotationOffset, Vector3 offsetPosition)
        {
            m_name = "Primitive";

            Rezzed = DateTime.UtcNow;
            _creationDate = (int)Utils.DateTimeToUnixTime(Rezzed);
            _ownerID = ownerID;
            _creatorID = _ownerID;
            _lastOwnerID = UUID.Zero;
            UUID = UUID.Random();
            Shape = shape;
            // Todo: Add More Object Parameter from above!
            _ownershipCost = 0;
            _objectSaleType = 0;
            _salePrice = 0;
            _category = 0;
            _lastOwnerID = _creatorID;
            // End Todo: ///
            GroupPosition = groupPosition;
            OffsetPosition = offsetPosition;
            RotationOffset = rotationOffset;
            Velocity = Vector3.Zero;
            AngularVelocity = Vector3.Zero;
            Acceleration = Vector3.Zero;
            m_TextureAnimation = Utils.EmptyBytes;
            m_particleSystem = Utils.EmptyBytes;

            // Prims currently only contain a single folder (Contents).  From looking at the Second Life protocol,
            // this appears to have the same UUID (!) as the prim.  If this isn't the case, one can't drag items from
            // the prim into an agent inventory (Linden client reports that the "Object not found for drop" in its log

            Flags = 0;
            CreateSelected = true;

            TrimPermissions();
            //m_undo = new UndoStack<UndoState>(ParentGroup.GetSceneMaxUndo());
            
            //m_inventory = new SceneObjectPartInventory(this);
            m_inventory = new SceneObjectPartInventoryBase(this);
        }

        #endregion Constructors

        #region XML Schema

        private UUID _lastOwnerID;
        private UUID _ownerID;
        private UUID _groupID;
        private int _ownershipCost;
        private byte _objectSaleType;
        private int _salePrice;
        private uint _category;
        private Int32 _creationDate;
        private uint _parentID = 0;
        private UUID m_sitTargetAvatar = UUID.Zero;
        private uint _baseMask = (uint)PermissionMask.All;
        private uint _ownerMask = (uint)PermissionMask.All;
        private uint _groupMask = (uint)PermissionMask.None;
        private uint _everyoneMask = (uint)PermissionMask.None;
        private uint _nextOwnerMask = (uint)PermissionMask.All;
        private PrimFlags _flags = PrimFlags.None;
        private DateTime m_expires;
        private DateTime m_rezzed;
        private bool m_createSelected = false;
        private string m_creatorData = string.Empty;

        public UUID CreatorID 
        {
            get
            {
                return _creatorID;
            }
            set
            {
                _creatorID = value;
            }
        }

        /// <summary>
        /// Data about the creator in the form profile_url;name
        /// </summary>
        public string CreatorData 
        {
            get { return m_creatorData; }
            set { m_creatorData = value; }
        }

        /// <summary>
        /// Used by the DB layer to retrieve / store the entire user identification.
        /// The identification can either be a simple UUID or a string of the form
        /// uuid[;profile_url[;name]]
        /// </summary>
        public string CreatorIdentification
        {
            get
            {
                if (m_creatorData != null && m_creatorData != string.Empty)
                    return _creatorID.ToString() + ';' + m_creatorData;
                else
                    return _creatorID.ToString();
            }
            set
            {
                if ((value == null) || (value != null && value == string.Empty))
                {
                    m_creatorData = string.Empty;
                    return;
                }

                if (!value.Contains(";")) // plain UUID
                {
                    UUID uuid = UUID.Zero;
                    UUID.TryParse(value, out uuid);
                    _creatorID = uuid;
                }
                else // <uuid>[;<endpoint>[;name]]
                {
                    string name = "Unknown User";
                    string[] parts = value.Split(';');
                    if (parts.Length >= 1)
                    {
                        UUID uuid = UUID.Zero;
                        UUID.TryParse(parts[0], out uuid);
                        _creatorID = uuid;
                    }
                    if (parts.Length >= 2)
                        m_creatorData = parts[1];
                    if (parts.Length >= 3)
                        name = parts[2];

                    m_creatorData += ';' + name;
                    
                }
            }
        }

        /// <summary>
        /// A relic from when we we thought that prims contained folder objects. In 
        /// reality, prim == folder
        /// Exposing this is not particularly good, but it's one of the least evils at the moment to see
        /// folder id from prim inventory item data, since it's not (yet) actually stored with the prim.
        /// </summary>
        public UUID FolderID
        {
            get { return UUID; }
            set { } // Don't allow assignment, or legacy prims wil b0rk - but we need the setter for legacy serialization.
        }

        /// <value>
        /// Access should be via Inventory directly - this property temporarily remains for xml serialization purposes
        /// </value>
        public uint InventorySerial
        {
            get { return m_inventory.Serial; }
            set { m_inventory.Serial = value; }
        }

        /// <value>
        /// Access should be via Inventory directly - this property temporarily remains for xml serialization purposes
        /// </value>
        public TaskInventoryDictionary TaskInventory
        {
            get { return m_inventory.Items; }
            set { m_inventory.Items = value; }
        }

        /// <summary>
        /// This is idential to the Flags property, except that the returned value is uint rather than PrimFlags
        /// </summary>
        [Obsolete("Use Flags property instead")]
        public uint ObjectFlags
        {
            get { return (uint)Flags; }
            set { Flags = (PrimFlags)value; }
        }

        public UUID UUID
        {
            get { return m_uuid; }
            set 
            { 
                m_uuid = value; 
                
                // This is necessary so that TaskInventoryItem parent ids correctly reference the new uuid of this part
                if (Inventory != null)
                    Inventory.ResetObjectID();
            }
        }

        public uint LocalId
        {
            get { return m_localId; }
            set { m_localId = value; }
        }

        public virtual string Name
        {
            get { return m_name; }
            set 
            { 
                m_name = value;
                if (PhysActor != null)
                {
                    PhysActor.SOPName = value;
                }
            }
        }

        public byte Material
        {
            get { return (byte) m_material; }
            set
            {
                m_material = (Material)value;
                if (PhysActor != null)
                {
                    PhysActor.SetMaterial((int)value);
                }
            }
        }

        public bool PassTouches
        {
            get { return m_passTouches; }
            set
            {
                m_passTouches = value;
                if (ParentGroup != null)
                    ParentGroup.HasGroupChanged = true;
            }
        }

        
        
        public Dictionary<int, string> CollisionFilter
        {
            get { return m_CollisionFilter; }
            set
            {
                m_CollisionFilter = value;
            }
        }

        
        public Quaternion APIDTarget
        {
            get { return m_APIDTarget; }
            set { m_APIDTarget = value; }
        }

        
        public float APIDDamp
        {
            get { return m_APIDDamp; }
            set { m_APIDDamp = value; }
        }

        
        public float APIDStrength
        {
            get { return m_APIDStrength; }
            set { m_APIDStrength = value; }
        }

        public ulong RegionHandle
        {
            get { return m_regionHandle; }
            set { m_regionHandle = value; }
        }

        public int ScriptAccessPin
        {
            get { return m_scriptAccessPin; }
            set { m_scriptAccessPin = (int)value; }
        }
        private SceneObjectPart m_PlaySoundMasterPrim = null;
        public SceneObjectPart PlaySoundMasterPrim
        {
            get { return m_PlaySoundMasterPrim; }
            set { m_PlaySoundMasterPrim = value; }
        }

        private List<SceneObjectPart> m_PlaySoundSlavePrims = new List<SceneObjectPart>();
        public List<SceneObjectPart> PlaySoundSlavePrims
        {
            get { return m_PlaySoundSlavePrims; }
            set { m_PlaySoundSlavePrims = value; }
        }

        private SceneObjectPart m_LoopSoundMasterPrim = null;
        public SceneObjectPart LoopSoundMasterPrim
        {
            get { return m_LoopSoundMasterPrim; }
            set { m_LoopSoundMasterPrim = value; }
        }

        private List<SceneObjectPart> m_LoopSoundSlavePrims = new List<SceneObjectPart>();
        public List<SceneObjectPart> LoopSoundSlavePrims
        {
            get { return m_LoopSoundSlavePrims; }
            set { m_LoopSoundSlavePrims = value; }
        }

        
        public Byte[] TextureAnimation
        {
            get { return m_TextureAnimation; }
            set { m_TextureAnimation = value; }
        }

        
        public Byte[] ParticleSystem
        {
            get { return m_particleSystem; }
            set { m_particleSystem = value; }
        }

        
        public DateTime Expires
        {
            get { return m_expires; }
            set { m_expires = value; }
        }

        
        public DateTime Rezzed
        {
            get { return m_rezzed; }
            set { m_rezzed = value; }
        }

        
        public float Damage
        {
            get { return m_damage; }
            set { m_damage = value; }
        }

        /// <summary>
        /// The position of the entire group that this prim belongs to.
        /// </summary>
        public Vector3 GroupPosition
        {
            get
            {
                // If this is a linkset, we don't want the physics engine mucking up our group position here.
                PhysicsActor actor = PhysActor;
                if (actor != null && _parentID == 0)
                {
                    m_groupPosition = actor.Position;
                }

                if (IsAttachment)
                {
                    if (m_parentGroup != null) //need to check this, it would be null while deserialization -- IsAttachment is now serialized
                    {
                        ScenePresence sp = m_parentGroup.Scene.GetScenePresence(AttachedAvatar);
                        if (sp != null)
                            return sp.AbsolutePosition;
                    }
                }

                return m_groupPosition;
            }
            set
            {
                m_groupPosition = value;

                PhysicsActor actor = PhysActor;
                if (actor != null)
                {
                    try
                    {
                        // Root prim actually goes at Position
                        if (_parentID == 0)
                        {
                            actor.Position = value;
                        }
                        else
                        {
                            // To move the child prim in respect to the group position and rotation we have to calculate
                            actor.Position = GetWorldPosition();
                            actor.Orientation = GetWorldRotation();
                        }

                        // Tell the physics engines that this prim changed.
                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(actor);
                    }
                    catch (Exception e)
                    {
                        m_log.Error("[SCENEOBJECTPART]: GROUP POSITION. " + e.Message);
                    }
                }
                
                // TODO if we decide to do sitting in a more SL compatible way (multiple avatars per prim), this has to be fixed, too
                if (m_sitTargetAvatar != UUID.Zero)
                {
                    if (m_parentGroup != null) // TODO can there be a SOP without a SOG?
                    {
                        ScenePresence avatar;
                        if (m_parentGroup.Scene.TryGetScenePresence(m_sitTargetAvatar, out avatar))
                        {
                            avatar.ParentPosition = GetWorldPosition();
                        }
                    }
                }
            }
        }

        public Vector3 OffsetPosition
        {
            get { return m_offsetPosition; }
            set
            {
                StoreUndoState();
                m_offsetPosition = value;

                if (ParentGroup != null && !ParentGroup.IsDeleted)
                {
                    PhysicsActor actor = PhysActor;
                    if (_parentID != 0 && actor != null)
                    {
                        actor.Position = GetWorldPosition();
                        actor.Orientation = GetWorldRotation();

                        // Tell the physics engines that this prim changed.
                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(actor);
                    }
                }
            }
        }

        public Vector3 RelativePosition
        {
            get
            {
                if (IsRoot)
                {
                    if (IsAttachment)
                        return AttachedPos;
                    else
                        return AbsolutePosition;
                }
                else
                {
                    return OffsetPosition;
                }
            }
        }

        public Quaternion RotationOffset
        {
            get
            {
                // We don't want the physics engine mucking up the rotations in a linkset
                PhysicsActor actor = PhysActor;
                if (_parentID == 0 && (Shape.PCode != 9 || Shape.State == 0)  && actor != null)
                {
                    if (actor.Orientation.X != 0f || actor.Orientation.Y != 0f
                        || actor.Orientation.Z != 0f || actor.Orientation.W != 0f)
                    {
                        m_rotationOffset = actor.Orientation;
                    }
                }
                
                return m_rotationOffset;
            }
            
            set
            {
                StoreUndoState();
                m_rotationOffset = value;

                PhysicsActor actor = PhysActor;
                if (actor != null)
                {
                    try
                    {
                        // Root prim gets value directly
                        if (_parentID == 0)
                        {
                            actor.Orientation = value;
                            //m_log.Info("[PART]: RO1:" + actor.Orientation.ToString());
                        }
                        else
                        {
                            // Child prim we have to calculate it's world rotationwel
                            Quaternion resultingrotation = GetWorldRotation();
                            actor.Orientation = resultingrotation;
                            //m_log.Info("[PART]: RO2:" + actor.Orientation.ToString());
                        }
                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(actor);
                        //}
                    }
                    catch (Exception ex)
                    {
                        m_log.Error("[SCENEOBJECTPART]: ROTATIONOFFSET" + ex.Message);
                    }
                }

            }
        }

        /// <summary></summary>
        public Vector3 Velocity
        {
            get
            {
                PhysicsActor actor = PhysActor;
                if (actor != null)
                {
                    if (actor.IsPhysical)
                    {
                        m_velocity = actor.Velocity;
                    }
                }

                return m_velocity;
            }

            set
            {
                m_velocity = value;

                PhysicsActor actor = PhysActor;
                if (actor != null)
                {
                    if (actor.IsPhysical)
                    {
                        actor.Velocity = value;
                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(actor);
                    }
                }
            }
        }

        /// <summary></summary>
        public Vector3 AngularVelocity
        {
            get
            {
                PhysicsActor actor = PhysActor;
                if ((actor != null) && actor.IsPhysical)
                {
                    m_angularVelocity = actor.RotationalVelocity;
                }
                return m_angularVelocity;
            }
            set { m_angularVelocity = value; }
        }

        /// <summary></summary>
        public Vector3 Acceleration
        {
            get { return m_acceleration; }
            set { m_acceleration = value; }
        }

        public string Description
        {
            get { return m_description; }
            set 
            {
                m_description = value;
                PhysicsActor actor = PhysActor;
                if (actor != null)
                {
                    actor.SOPDescription = value;
                }
            }
        }

        /// <value>
        /// Text color.
        /// </value>
        public Color Color
        {
            get { return m_color; }
            set
            {
                m_color = value;

                /* ScheduleFullUpdate() need not be called b/c after
                 * setting the color, the text will be set, so then
                 * ScheduleFullUpdate() will be called. */
                //ScheduleFullUpdate();
            }
        }

        public string Text
        {
            get
            {
                string returnstr = m_text;
                if (returnstr.Length > 255)
                {
                    returnstr = returnstr.Substring(0, 254);
                }
                return returnstr;
            }
            set
            {
                m_text = value;
            }
        }


        public string SitName
        {
            get { return m_sitName; }
            set { m_sitName = value; }
        }

        public string TouchName
        {
            get { return m_touchName; }
            set { m_touchName = value; }
        }

        public int LinkNum
        {
            get { return m_linkNum; }
            set { m_linkNum = value; }
        }

        public byte ClickAction
        {
            get { return m_clickAction; }
            set
            {
                m_clickAction = value;
            }
        }

        public PrimitiveBaseShape Shape
        {
            get { return m_shape; }
            set { m_shape = value; }
        }
        
        public Vector3 Scale
        {
            get { return m_shape.Scale; }
            set
            {
                StoreUndoState();
                if (m_shape != null)
                {
                    m_shape.Scale = value;

                    PhysicsActor actor = PhysActor;
                    if (actor != null && m_parentGroup != null)
                    {
                        if (m_parentGroup.Scene != null)
                        {
                            if (m_parentGroup.Scene.PhysicsScene != null)
                            {
                                actor.Size = m_shape.Scale;
                                m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(actor);
                            }
                        }
                    }
                }
                TriggerScriptChangedEvent(Changed.SCALE);
            }
        }
        
        public byte UpdateFlag
        {
            get { return m_updateFlag; }
            set { m_updateFlag = value; }
        }
        
        /// <summary>
        /// Used for media on a prim.
        /// </summary>
        /// Do not change this value directly - always do it through an IMoapModule.
        public string MediaUrl 
        { 
            get
            {
                return m_mediaUrl; 
            }
            
            set
            {
                m_mediaUrl = value;
                
                if (ParentGroup != null)
                    ParentGroup.HasGroupChanged = true;
            }
        }

        
        public bool CreateSelected
        {
            get { return m_createSelected; }
            set 
            { 
//                m_log.DebugFormat("[SOP]: Setting CreateSelected to {0} for {1} {2}", value, Name, UUID);
                m_createSelected = value; 
            }
        }

        #endregion

//---------------
#region Public Properties with only Get

        public Vector3 AbsolutePosition
        {
            get {
                if (IsAttachment)
                    return GroupPosition;

                return m_offsetPosition + m_groupPosition; }
        }

        public SceneObjectGroup ParentGroup
        {
            get { return m_parentGroup; }
        }

        public scriptEvents ScriptEvents
        {
            get { return AggregateScriptEvents; }
        }

        public Quaternion SitTargetOrientation
        {
            get { return m_sitTargetOrientation; }
            set { m_sitTargetOrientation = value; }
        }


        public Vector3 SitTargetPosition
        {
            get { return m_sitTargetPosition; }
            set { m_sitTargetPosition = value; }
        }

        // This sort of sucks, but I'm adding these in to make some of
        // the mappings more consistant.
        public Vector3 SitTargetPositionLL
        {
            get { return new Vector3(m_sitTargetPosition.X, m_sitTargetPosition.Y,m_sitTargetPosition.Z); }
            set { m_sitTargetPosition = value; }
        }

        public Quaternion SitTargetOrientationLL
        {
            get
            {
                return new Quaternion(
                                        m_sitTargetOrientation.X,
                                        m_sitTargetOrientation.Y,
                                        m_sitTargetOrientation.Z,
                                        m_sitTargetOrientation.W
                                        );
            }

            set { m_sitTargetOrientation = new Quaternion(value.X, value.Y, value.Z, value.W); }
        }

        public bool Stopped
        {
            get {
                double threshold = 0.02;
                return (Math.Abs(Velocity.X) < threshold &&
                        Math.Abs(Velocity.Y) < threshold &&
                        Math.Abs(Velocity.Z) < threshold &&
                        Math.Abs(AngularVelocity.X) < threshold &&
                        Math.Abs(AngularVelocity.Y) < threshold &&
                        Math.Abs(AngularVelocity.Z) < threshold);
            }
        }

        public uint ParentID
        {
            get { return _parentID; }
            set { _parentID = value; }
        }

        public int CreationDate
        {
            get { return _creationDate; }
            set { _creationDate = value; }
        }

        public uint Category
        {
            get { return _category; }
            set { _category = value; }
        }

        public int SalePrice
        {
            get { return _salePrice; }
            set { _salePrice = value; }
        }

        public byte ObjectSaleType
        {
            get { return _objectSaleType; }
            set { _objectSaleType = value; }
        }

        public int OwnershipCost
        {
            get { return _ownershipCost; }
            set { _ownershipCost = value; }
        }

        public UUID GroupID
        {
            get { return _groupID; }
            set { _groupID = value; }
        }

        public UUID OwnerID
        {
            get { return _ownerID; }
            set { _ownerID = value; }
        }

        public UUID LastOwnerID
        {
            get { return _lastOwnerID; }
            set { _lastOwnerID = value; }
        }

        public uint BaseMask
        {
            get { return _baseMask; }
            set { _baseMask = value; }
        }

        public uint OwnerMask
        {
            get { return _ownerMask; }
            set { _ownerMask = value; }
        }

        public uint GroupMask
        {
            get { return _groupMask; }
            set { _groupMask = value; }
        }

        public uint EveryoneMask
        {
            get { return _everyoneMask; }
            set { _everyoneMask = value; }
        }

        public uint NextOwnerMask
        {
            get { return _nextOwnerMask; }
            set { _nextOwnerMask = value; }
        }

        /// <summary>
        /// Property flags.  See OpenMetaverse.PrimFlags 
        /// </summary>
        /// Example properties are PrimFlags.Phantom and PrimFlags.DieAtEdge
        public PrimFlags Flags
        {
            get { return _flags; }
            set 
            { 
//                m_log.DebugFormat("[SOP]: Setting flags for {0} {1} to {2}", UUID, Name, value);
                _flags = value; 
            }
        }

        
        public UUID SitTargetAvatar
        {
            get { return m_sitTargetAvatar; }
            set { m_sitTargetAvatar = value; }
        }

        
        public virtual UUID RegionID
        {
            get
            {
                if (ParentGroup != null && ParentGroup.Scene != null)
                    return ParentGroup.Scene.RegionInfo.RegionID;
                else
                    return UUID.Zero;
            }
            set {} // read only
        }

        private UUID _parentUUID = UUID.Zero;
        
        public UUID ParentUUID
        {
            get
            {
                if (ParentGroup != null)
                {
                    _parentUUID = ParentGroup.UUID;
                }
                return _parentUUID;
            }
            set { _parentUUID = value; }
        }

        
        public string SitAnimation
        {
            get { return m_sitAnimation; }
            set { m_sitAnimation = value; }
        }

        public UUID CollisionSound
        {
            get { return m_collisionSound; }
            set
            {
                m_collisionSound = value;
                aggregateScriptEvents();
            }
        }

        public float CollisionSoundVolume
        {
            get { return m_collisionSoundVolume; }
            set { m_collisionSoundVolume = value; }
        }

        #endregion Public Properties with only Get

        #region Private Methods

        private uint ApplyMask(uint val, bool set, uint mask)
        {
            if (set)
            {
                return val |= mask;
            }
            else
            {
                return val &= ~mask;
            }
        }

        /// <summary>
        /// Clear all pending updates of parts to clients
        /// </summary>
        private void ClearUpdateSchedule()
        {
            m_updateFlag = 0;
        }

        private void SendObjectPropertiesToClient(UUID AgentID)
        {
            m_parentGroup.Scene.ForEachScenePresence(delegate(ScenePresence avatar)
            {
                // Ugly reference :(
                if (avatar.UUID == AgentID)
                {
                    m_parentGroup.GetProperties(avatar.ControllingClient);
                }
            });
        }

        // TODO: unused:
        // private void handleTimerAccounting(uint localID, double interval)
        // {
        //     if (localID == LocalId)
        //     {
        //         float sec = (float)interval;
        //         if (m_parentGroup != null)
        //         {
        //             if (sec == 0)
        //             {
        //                 if (m_parentGroup.scriptScore + 0.001f >= float.MaxValue - 0.001)
        //                     m_parentGroup.scriptScore = 0;
        //
        //                 m_parentGroup.scriptScore += 0.001f;
        //                 return;
        //             }
        //
        //             if (m_parentGroup.scriptScore + (0.001f / sec) >= float.MaxValue - (0.001f / sec))
        //                 m_parentGroup.scriptScore = 0;
        //             m_parentGroup.scriptScore += (0.001f / sec);
        //         }
        //     }
        // }

        #endregion Private Methods

        #region Public Methods

        public void ResetExpire()
        {
            Expires = DateTime.Now + new TimeSpan(600000000);
        }

        public void AddFlag(PrimFlags flag)
        {
            // PrimFlags prevflag = Flags;
            if ((Flags & flag) == 0)
            {
                //m_log.Debug("Adding flag: " + ((PrimFlags) flag).ToString());
                Flags |= flag;

                if (flag == PrimFlags.TemporaryOnRez)
                    ResetExpire();
            }
            // m_log.Debug("Aprev: " + prevflag.ToString() + " curr: " + Flags.ToString());
        }

        /// <summary>
        /// Tell all scene presences that they should send updates for this part to their clients
        /// </summary>
        public void AddFullUpdateToAllAvatars()
        {
            m_parentGroup.Scene.ForEachScenePresence(delegate(ScenePresence avatar)
            {
                AddFullUpdateToAvatar(avatar);
            });
            // REGION SYNC
            if (m_parentGroup.Scene.IsSyncedServer())
                m_parentGroup.Scene.RegionSyncServerModule.QueuePartForUpdate((SceneObjectPart)this);
        }

        /// <summary>
        /// Tell the scene presence that it should send updates for this part to its client
        /// </summary>
        public void AddFullUpdateToAvatar(ScenePresence presence)
        {
            presence.SceneViewer.QueuePartForUpdate((SceneObjectPart)this);
        }

        public void AddNewParticleSystem(Primitive.ParticleSystem pSystem)
        {
            m_particleSystem = pSystem.GetBytes();
        }

        public void RemoveParticleSystem()
        {
            m_particleSystem = new byte[0];
        }

        /// Terse updates
        public void AddTerseUpdateToAllAvatars()
        {
            m_parentGroup.Scene.ForEachScenePresence(delegate(ScenePresence avatar)
            {
                AddTerseUpdateToAvatar(avatar);
            });
            // REGION SYNC
            if (m_parentGroup.Scene.IsSyncedServer())
                m_parentGroup.Scene.RegionSyncServerModule.QueuePartForUpdate((SceneObjectPart)this);
        }

        public void AddTerseUpdateToAvatar(ScenePresence presence)
        {
            presence.SceneViewer.QueuePartForUpdate((SceneObjectPart)this);
        }

        public void AddTextureAnimation(Primitive.TextureAnimation pTexAnim)
        {
            byte[] data = new byte[16];
            int pos = 0;

            // The flags don't like conversion from uint to byte, so we have to do
            // it the crappy way.  See the above function :(

            data[pos] = ConvertScriptUintToByte((uint)pTexAnim.Flags); pos++;
            data[pos] = (byte)pTexAnim.Face; pos++;
            data[pos] = (byte)pTexAnim.SizeX; pos++;
            data[pos] = (byte)pTexAnim.SizeY; pos++;

            Utils.FloatToBytes(pTexAnim.Start).CopyTo(data, pos);
            Utils.FloatToBytes(pTexAnim.Length).CopyTo(data, pos + 4);
            Utils.FloatToBytes(pTexAnim.Rate).CopyTo(data, pos + 8);

            m_TextureAnimation = data;
        }

        public void AdjustSoundGain(double volume)
        {
            if (volume > 1)
                volume = 1;
            if (volume < 0)
                volume = 0;

            m_parentGroup.Scene.ForEachScenePresence(delegate(ScenePresence sp)
            {
                if (!sp.IsChildAgent)
                    sp.ControllingClient.SendAttachedSoundGainChange(UUID, (float)volume);
            });
        }

        /// <summary>
        /// hook to the physics scene to apply impulse
        /// This is sent up to the group, which then finds the root prim
        /// and applies the force on the root prim of the group
        /// </summary>
        /// <param name="impulsei">Vector force</param>
        /// <param name="localGlobalTF">true for the local frame, false for the global frame</param>
        public void ApplyImpulse(Vector3 impulsei, bool localGlobalTF)
        {
            Vector3 impulse = impulsei;

            if (localGlobalTF)
            {
                Quaternion grot = GetWorldRotation();
                Quaternion AXgrot = grot;
                Vector3 AXimpulsei = impulsei;
                Vector3 newimpulse = AXimpulsei * AXgrot;
                impulse = newimpulse;
            }

            if (m_parentGroup != null)
            {
                m_parentGroup.applyImpulse(impulse);
            }
        }

        /// <summary>
        /// hook to the physics scene to apply angular impulse
        /// This is sent up to the group, which then finds the root prim
        /// and applies the force on the root prim of the group
        /// </summary>
        /// <param name="impulsei">Vector force</param>
        /// <param name="localGlobalTF">true for the local frame, false for the global frame</param>
        public void ApplyAngularImpulse(Vector3 impulsei, bool localGlobalTF)
        {
            Vector3 impulse = impulsei;

            if (localGlobalTF)
            {
                Quaternion grot = GetWorldRotation();
                Quaternion AXgrot = grot;
                Vector3 AXimpulsei = impulsei;
                Vector3 newimpulse = AXimpulsei * AXgrot;
                impulse = newimpulse;
            }

            if (m_parentGroup != null)
            {
                m_parentGroup.applyAngularImpulse(impulse);
            }
        }

        /// <summary>
        /// hook to the physics scene to apply angular impulse
        /// This is sent up to the group, which then finds the root prim
        /// and applies the force on the root prim of the group
        /// </summary>
        /// <param name="impulsei">Vector force</param>
        /// <param name="localGlobalTF">true for the local frame, false for the global frame</param>
        public void SetAngularImpulse(Vector3 impulsei, bool localGlobalTF)
        {
            Vector3 impulse = impulsei;

            if (localGlobalTF)
            {
                Quaternion grot = GetWorldRotation();
                Quaternion AXgrot = grot;
                Vector3 AXimpulsei = impulsei;
                Vector3 newimpulse = AXimpulsei * AXgrot;
                impulse = newimpulse;
            }

            if (m_parentGroup != null)
            {
                m_parentGroup.setAngularImpulse(impulse);
            }
        }

        public Vector3 GetTorque()
        {
            if (m_parentGroup != null)
            {
                m_parentGroup.GetTorque();
            }
            return Vector3.Zero;
        }

        /// <summary>
        /// Apply physics to this part.
        /// </summary>
        /// <param name="rootObjectFlags"></param>
        /// <param name="m_physicalPrim"></param>
        public void ApplyPhysics(uint rootObjectFlags, bool VolumeDetectActive, bool m_physicalPrim)
        {
            bool isPhysical = (((rootObjectFlags & (uint) PrimFlags.Physics) != 0) && m_physicalPrim);
            bool isPhantom = ((rootObjectFlags & (uint) PrimFlags.Phantom) != 0);

            if (IsJoint())
            {
                DoPhysicsPropertyUpdate(isPhysical, true);
            }
            else
            {
                // Special case for VolumeDetection: If VolumeDetection is set, the phantom flag is locally ignored
                if (VolumeDetectActive)
                    isPhantom = false;

                // Added clarification..   since A rigid body is an object that you can kick around, etc.
                bool RigidBody = isPhysical && !isPhantom;

                // The only time the physics scene shouldn't know about the prim is if it's phantom or an attachment, which is phantom by definition
                // or flexible
                if (!isPhantom && !IsAttachment && !(Shape.PathCurve == (byte) Extrusion.Flexible))
                {
                    PhysActor = m_parentGroup.Scene.PhysicsScene.AddPrimShape(
                        string.Format("{0}/{1}", Name, UUID),
                        Shape,
                        AbsolutePosition,
                        Scale,
                        RotationOffset,
                        RigidBody);

                    // Basic Physics returns null..  joy joy joy.
                    if (PhysActor != null)
                    {
                        PhysActor.SOPName = this.Name; // save object name and desc into the PhysActor so ODE internals know the joint/body info
                        PhysActor.SOPDescription = this.Description;
                        PhysActor.LocalID = LocalId;
                        PhysActor.UUID = UUID;
                        DoPhysicsPropertyUpdate(RigidBody, true);
                        PhysActor.SetVolumeDetect(VolumeDetectActive ? 1 : 0);
                    }
                    else
                    {
                        //m_log.DebugFormat("[SOP]: physics actor is null for {0} with parent {1}", UUID, this.ParentGroup.UUID);
                    }
                }
            }
        }

        public void ClearUndoState()
        {
            lock (m_undo)
            {
                m_undo.Clear();
            }
            lock (m_redo)
            {
                m_redo.Clear();
            }
            StoreUndoState();
        }

        public byte ConvertScriptUintToByte(uint indata)
        {
            byte outdata = (byte)TextureAnimFlags.NONE;
            if ((indata & 1) != 0) outdata |= (byte)TextureAnimFlags.ANIM_ON;
            if ((indata & 2) != 0) outdata |= (byte)TextureAnimFlags.LOOP;
            if ((indata & 4) != 0) outdata |= (byte)TextureAnimFlags.REVERSE;
            if ((indata & 8) != 0) outdata |= (byte)TextureAnimFlags.PING_PONG;
            if ((indata & 16) != 0) outdata |= (byte)TextureAnimFlags.SMOOTH;
            if ((indata & 32) != 0) outdata |= (byte)TextureAnimFlags.ROTATE;
            if ((indata & 64) != 0) outdata |= (byte)TextureAnimFlags.SCALE;
            return outdata;
        }

        /// <summary>
        /// Duplicates this part.
        /// </summary>
        /// <param name="localID"></param>
        /// <param name="AgentID"></param>
        /// <param name="GroupID"></param>
        /// <param name="linkNum"></param>
        /// <param name="userExposed">True if the duplicate will immediately be in the scene, false otherwise</param>
        /// <returns></returns>
        public SceneObjectPart Copy(uint localID, UUID AgentID, UUID GroupID, int linkNum, bool userExposed)
        {
            SceneObjectPart dupe = (SceneObjectPart)MemberwiseClone();
            dupe.m_shape = m_shape.Copy();
            dupe.m_regionHandle = m_regionHandle;
            if (userExposed)
                dupe.UUID = UUID.Random();

            //memberwiseclone means it also clones the physics actor reference
            // This will make physical prim 'bounce' if not set to null.
            if (!userExposed)
                dupe.PhysActor = null;

            dupe._ownerID = AgentID;
            dupe._groupID = GroupID;
            dupe.GroupPosition = GroupPosition;
            dupe.OffsetPosition = OffsetPosition;
            dupe.RotationOffset = RotationOffset;
            dupe.Velocity = new Vector3(0, 0, 0);
            dupe.Acceleration = new Vector3(0, 0, 0);
            dupe.AngularVelocity = new Vector3(0, 0, 0);
            dupe.Flags = Flags;

            dupe._ownershipCost = _ownershipCost;
            dupe._objectSaleType = _objectSaleType;
            dupe._salePrice = _salePrice;
            dupe._category = _category;
            dupe.m_rezzed = m_rezzed;

            dupe.m_inventory = new SceneObjectPartInventory(dupe);
            dupe.m_inventory.Items = (TaskInventoryDictionary)m_inventory.Items.Clone();

            if (userExposed)
            {
                dupe.ResetIDs(linkNum);
                dupe.m_inventory.HasInventoryChanged = true;
            }
            else
            {
                dupe.m_inventory.HasInventoryChanged = m_inventory.HasInventoryChanged;
            }

            // Move afterwards ResetIDs as it clears the localID
            dupe.LocalId = localID;
            // This may be wrong...    it might have to be applied in SceneObjectGroup to the object that's being duplicated.
            dupe._lastOwnerID = OwnerID;

            byte[] extraP = new byte[Shape.ExtraParams.Length];
            Array.Copy(Shape.ExtraParams, extraP, extraP.Length);
            dupe.Shape.ExtraParams = extraP;

            if (userExposed)
            {
                if (dupe.m_shape.SculptEntry && dupe.m_shape.SculptTexture != UUID.Zero)
                {
                    m_parentGroup.Scene.AssetService.Get(dupe.m_shape.SculptTexture.ToString(), dupe, AssetReceived); 
                }
                
                bool UsePhysics = ((dupe.Flags & PrimFlags.Physics) != 0);
                dupe.DoPhysicsPropertyUpdate(UsePhysics, true);
            }
            
            ParentGroup.Scene.EventManager.TriggerOnSceneObjectPartCopy(dupe, (SceneObjectPart) this, userExposed);

//            m_log.DebugFormat("[SCENE OBJECT PART]: Clone of {0} {1} finished", Name, UUID);
                          
            return dupe;
        }

        protected void AssetReceived(string id, Object sender, AssetBase asset)
        {
            if (asset != null)
            {
                SceneObjectPart sop = (SceneObjectPart)sender;
                if (sop != null)
                    sop.SculptTextureCallback(asset.FullID, asset);
            }
        }

        public static SceneObjectPart Create()
        {
            SceneObjectPart part = new SceneObjectPart();
            part.UUID = UUID.Random();

            PrimitiveBaseShape shape = PrimitiveBaseShape.Create();
            part.Shape = shape;

            part.Name = "Primitive";
            part._ownerID = UUID.Random();

            return part;
        }

        public void DoPhysicsPropertyUpdate(bool UsePhysics, bool isNew)
        {
            if (IsJoint())
            {
                if (UsePhysics)
                {
                    // by turning a joint proxy object physical, we cause creation of a joint in the ODE scene.
                    // note that, as a special case, joints have no bodies or geoms in the physics scene, even though they are physical.

                    PhysicsJointType jointType;
                    if (IsHingeJoint())
                    {
                        jointType = PhysicsJointType.Hinge;
                    }
                    else if (IsBallJoint())
                    {
                        jointType = PhysicsJointType.Ball;
                    }
                    else
                    {
                        jointType = PhysicsJointType.Ball;
                    }

                    List<string> bodyNames = new List<string>();
                    string RawParams = Description;
                    string[] jointParams = RawParams.Split(" ".ToCharArray(), System.StringSplitOptions.RemoveEmptyEntries);
                    string trackedBodyName = null;
                    if (jointParams.Length >= 2)
                    {
                        for (int iBodyName = 0; iBodyName < 2; iBodyName++)
                        {
                            string bodyName = jointParams[iBodyName];
                            bodyNames.Add(bodyName);
                            if (bodyName != "NULL")
                            {
                                if (trackedBodyName == null)
                                {
                                    trackedBodyName = bodyName;
                                }
                            }
                        }
                    }

                    SceneObjectPart trackedBody = m_parentGroup.Scene.GetSceneObjectPart(trackedBodyName); // FIXME: causes a sequential lookup
                    Quaternion localRotation = Quaternion.Identity;
                    if (trackedBody != null)
                    {
                        localRotation = Quaternion.Inverse(trackedBody.RotationOffset) * this.RotationOffset;
                    }
                    else
                    {
                        // error, output it below
                    }

                    PhysicsJoint joint;

                    joint = m_parentGroup.Scene.PhysicsScene.RequestJointCreation(Name, jointType,
                        AbsolutePosition,
                        this.RotationOffset,
                        Description,
                        bodyNames,
                        trackedBodyName,
                        localRotation);

                    if (trackedBody == null)
                    {
                        ParentGroup.Scene.jointErrorMessage(joint, "warning: tracked body name not found! joint location will not be updated properly. joint: " + Name);
                    }

                }
                else
                {
                    if (isNew)
                    {
                        // if the joint proxy is new, and it is not physical, do nothing. There is no joint in ODE to
                        // delete, and if we try to delete it, due to asynchronous processing, the deletion request
                        // will get processed later at an indeterminate time, which could cancel a later-arriving
                        // joint creation request.
                    }
                    else
                    {
                        // here we turn off the joint object, so remove the joint from the physics scene
                        m_parentGroup.Scene.PhysicsScene.RequestJointDeletion(Name); // FIXME: what if the name changed?

                        // make sure client isn't interpolating the joint proxy object
                        Velocity = Vector3.Zero;
                        AngularVelocity = Vector3.Zero;
                        Acceleration = Vector3.Zero;
                    }
                }
            }
            else
            {
                if (PhysActor != null)
                {
                    if (UsePhysics != PhysActor.IsPhysical || isNew)
                    {
                        if (PhysActor.IsPhysical) // implies UsePhysics==false for this block
                        {
                            if (!isNew)
                                ParentGroup.Scene.RemovePhysicalPrim(1);

                            PhysActor.OnRequestTerseUpdate -= PhysicsRequestingTerseUpdate;
                            PhysActor.OnOutOfBounds -= PhysicsOutOfBounds;
                            PhysActor.delink();

                            if (ParentGroup.Scene.PhysicsScene.SupportsNINJAJoints && (!isNew))
                            {
                                // destroy all joints connected to this now deactivated body
                                m_parentGroup.Scene.PhysicsScene.RemoveAllJointsConnectedToActorThreadLocked(PhysActor);
                            }

                            // stop client-side interpolation of all joint proxy objects that have just been deleted
                            // this is done because RemoveAllJointsConnectedToActor invokes the OnJointDeactivated callback,
                            // which stops client-side interpolation of deactivated joint proxy objects.
                        }

                        if (!UsePhysics && !isNew)
                        {
                            // reset velocity to 0 on physics switch-off. Without that, the client thinks the
                            // prim still has velocity and continues to interpolate its position along the old
                            // velocity-vector.
                            Velocity = new Vector3(0, 0, 0);
                            Acceleration = new Vector3(0, 0, 0);
                            AngularVelocity = new Vector3(0, 0, 0);
                            //RotationalVelocity = new Vector3(0, 0, 0);
                        }

                        PhysActor.IsPhysical = UsePhysics;


                        // If we're not what we're supposed to be in the physics scene, recreate ourselves.
                        //m_parentGroup.Scene.PhysicsScene.RemovePrim(PhysActor);
                        /// that's not wholesome.  Had to make Scene public
                        //PhysActor = null;

                        if ((Flags & PrimFlags.Phantom) == 0)
                        {
                            if (UsePhysics)
                            {
                                ParentGroup.Scene.AddPhysicalPrim(1);

                                PhysActor.OnRequestTerseUpdate += PhysicsRequestingTerseUpdate;
                                PhysActor.OnOutOfBounds += PhysicsOutOfBounds;
                                if (_parentID != 0 && _parentID != LocalId)
                                {
                                    if (ParentGroup.RootPart.PhysActor != null)
                                    {
                                        PhysActor.link(ParentGroup.RootPart.PhysActor);
                                    }
                                }
                            }
                        }
                    }
                    m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
                }
            }
        }

        /// <summary>
        /// Restore this part from the serialized xml representation.
        /// </summary>
        /// <param name="xmlReader"></param>
        /// <returns></returns>
        public static SceneObjectPart FromXml(XmlTextReader xmlReader)
        {
            return FromXml(UUID.Zero, xmlReader);
        }

        /// <summary>
        /// Restore this part from the serialized xml representation.
        /// </summary>
        /// <param name="fromUserInventoryItemId">The inventory id from which this part came, if applicable</param>
        /// <param name="xmlReader"></param>
        /// <returns></returns>
        public static SceneObjectPart FromXml(UUID fromUserInventoryItemId, XmlTextReader xmlReader)
        {
            SceneObjectPart part = SceneObjectSerializer.Xml2ToSOP(xmlReader);
            part.m_fromUserInventoryItemID = fromUserInventoryItemId;

            // for tempOnRez objects, we have to fix the Expire date.
            if ((part.Flags & PrimFlags.TemporaryOnRez) != 0) part.ResetExpire();

            return part;
        }

        public UUID GetAvatarOnSitTarget()
        {
            return m_sitTargetAvatar;
        }

        public bool GetDieAtEdge()
        {
            if (m_parentGroup == null)
                return false;
            if (m_parentGroup.IsDeleted)
                return false;

            return m_parentGroup.RootPart.DIE_AT_EDGE;
        }

        public bool GetReturnAtEdge()
        {
            if (m_parentGroup == null)
                return false;
            if (m_parentGroup.IsDeleted)
                return false;

            return m_parentGroup.RootPart.RETURN_AT_EDGE;
        }

        public void SetReturnAtEdge(bool p)
        {
            if (m_parentGroup == null)
                return;
            if (m_parentGroup.IsDeleted)
                return;

            m_parentGroup.RootPart.RETURN_AT_EDGE = p;
        }

        public bool GetBlockGrab()
        {
            if (m_parentGroup == null)
                return false;
            if (m_parentGroup.IsDeleted)
                return false;

            return m_parentGroup.RootPart.BlockGrab;
        }

        public void SetBlockGrab(bool p)
        {
            if (m_parentGroup == null)
                return;
            if (m_parentGroup.IsDeleted)
                return;

            m_parentGroup.RootPart.BlockGrab = p;
        }

        public void SetStatusSandbox(bool p)
        {
            if (m_parentGroup == null)
                return;
            if (m_parentGroup.IsDeleted)
                return;
            StatusSandboxPos = m_parentGroup.RootPart.AbsolutePosition;
            m_parentGroup.RootPart.StatusSandbox = p;
        }

        public bool GetStatusSandbox()
        {
            if (m_parentGroup == null)
                return false;
            if (m_parentGroup.IsDeleted)
                return false;

            return m_parentGroup.RootPart.StatusSandbox;
        }

        public int GetAxisRotation(int axis)
        {
            //Cannot use ScriptBaseClass constants as no referance to it currently.
            if (axis == 2)//STATUS_ROTATE_X
                return STATUS_ROTATE_X;
            if (axis == 4)//STATUS_ROTATE_Y
                return STATUS_ROTATE_Y;
            if (axis == 8)//STATUS_ROTATE_Z
                return STATUS_ROTATE_Z;

            return 0;
        }

        public double GetDistanceTo(Vector3 a, Vector3 b)
        {
            float dx = a.X - b.X;
            float dy = a.Y - b.Y;
            float dz = a.Z - b.Z;
            return Math.Sqrt(dx * dx + dy * dy + dz * dz);
        }

        public uint GetEffectiveObjectFlags()
        {
            // Commenting this section of code out since it doesn't actually do anything, as enums are handled by 
            // value rather than reference
//            PrimFlags f = _flags;
//            if (m_parentGroup == null || m_parentGroup.RootPart == this)
//                f &= ~(PrimFlags.Touch | PrimFlags.Money);

            return (uint)Flags | (uint)LocalFlags;
        }

        public Vector3 GetGeometricCenter()
        {
            if (PhysActor != null)
            {
                return new Vector3(PhysActor.CenterOfMass.X, PhysActor.CenterOfMass.Y, PhysActor.CenterOfMass.Z);
            }
            else
            {
                return new Vector3(0, 0, 0);
            }
        }

        public float GetMass()
        {
            if (PhysActor != null)
            {
                return PhysActor.Mass;
            }
            else
            {
                return 0;
            }
        }

        public Vector3 GetForce()
        {
            if (PhysActor != null)
                return PhysActor.Force;
            else
                return Vector3.Zero;
        }

        public void GetProperties(IClientAPI client)
        {
            //Viewer wants date in microseconds so multiply it by 1,000,000.
            client.SendObjectPropertiesReply(
                m_fromUserInventoryItemID, (ulong)_creationDate*(ulong)1e6, _creatorID, UUID.Zero, UUID.Zero,
                _groupID, (short)InventorySerial, _lastOwnerID, UUID, _ownerID,
                ParentGroup.RootPart.TouchName, new byte[0], ParentGroup.RootPart.SitName, Name, Description,
                ParentGroup.RootPart._ownerMask, ParentGroup.RootPart._nextOwnerMask, ParentGroup.RootPart._groupMask, ParentGroup.RootPart._everyoneMask,
                ParentGroup.RootPart._baseMask,
                ParentGroup.RootPart.ObjectSaleType,
                ParentGroup.RootPart.SalePrice);
        }

        public UUID GetRootPartUUID()
        {
            if (m_parentGroup != null)
            {
                return m_parentGroup.UUID;
            }
            return UUID.Zero;
        }

        /// <summary>
        /// Method for a prim to get it's world position from the group.
        /// Remember, the Group Position simply gives the position of the group itself
        /// </summary>
        /// <returns>A Linked Child Prim objects position in world</returns>
        public Vector3 GetWorldPosition()
        {
            Quaternion parentRot = ParentGroup.RootPart.RotationOffset;

            Vector3 axPos = OffsetPosition;

            axPos *= parentRot;
            Vector3 translationOffsetPosition = axPos;
            return GroupPosition + translationOffsetPosition;
        }

        /// <summary>
        /// Gets the rotation of this prim offset by the group rotation
        /// </summary>
        /// <returns></returns>
        public Quaternion GetWorldRotation()
        {
            Quaternion newRot;

            if (this.LinkNum == 0 || this.LinkNum == 1)
            {
                newRot = RotationOffset;
            }
            else
            {
                Quaternion parentRot = ParentGroup.RootPart.RotationOffset;
                Quaternion oldRot = RotationOffset;
                newRot = parentRot * oldRot;
            }

            return newRot;
        }

        public void MoveToTarget(Vector3 target, float tau)
        {
            if (tau > 0)
            {
                m_parentGroup.moveToTarget(target, tau);
            }
            else
            {
                StopMoveToTarget();
            }
        }

        /// <summary>
        /// Uses a PID to attempt to clamp the object on the Z axis at the given height over tau seconds.
        /// </summary>
        /// <param name="height">Height to hover.  Height of zero disables hover.</param>
        /// <param name="hoverType">Determines what the height is relative to </param>
        /// <param name="tau">Number of seconds over which to reach target</param>
        public void SetHoverHeight(float height, PIDHoverType hoverType, float tau)
        {
            m_parentGroup.SetHoverHeight(height, hoverType, tau);
        }

        public void StopHover()
        {
            m_parentGroup.SetHoverHeight(0f, PIDHoverType.Ground, 0f);
        }

        public virtual void OnGrab(Vector3 offsetPos, IClientAPI remoteClient)
        {
        }

        public virtual void PhysicsCollision(EventArgs e)
        {
            // single threaded here
            if (e == null)
            {
                return;
            }

            CollisionEventUpdate a = (CollisionEventUpdate)e;
            Dictionary<uint, ContactPoint> collissionswith = a.m_objCollisionList;
            List<uint> thisHitColliders = new List<uint>();
            List<uint> endedColliders = new List<uint>();
            List<uint> startedColliders = new List<uint>();

            // calculate things that started colliding this time
            // and build up list of colliders this time
            foreach (uint localid in collissionswith.Keys)
            {
                thisHitColliders.Add(localid);
                if (!m_lastColliders.Contains(localid))
                {
                    startedColliders.Add(localid);
                }
                //m_log.Debug("[OBJECT]: Collided with:" + localid.ToString() + " at depth of: " + collissionswith[localid].ToString());
            }

            // calculate things that ended colliding
            foreach (uint localID in m_lastColliders)
            {
                if (!thisHitColliders.Contains(localID))
                {
                    endedColliders.Add(localID);
                }
            }

            //add the items that started colliding this time to the last colliders list.
            foreach (uint localID in startedColliders)
            {
                m_lastColliders.Add(localID);
            }
            // remove things that ended colliding from the last colliders list
            foreach (uint localID in endedColliders)
            {
                m_lastColliders.Remove(localID);
            }

            if (m_parentGroup == null)
                return;
            if (m_parentGroup.IsDeleted)
                return;

            // play the sound.
            if (startedColliders.Count > 0 && CollisionSound != UUID.Zero && CollisionSoundVolume > 0.0f)
            {
                SendSound(CollisionSound.ToString(), CollisionSoundVolume, true, (byte)0, 0, false, false);
            }

            if ((m_parentGroup.RootPart.ScriptEvents & scriptEvents.collision_start) != 0)
            {
                // do event notification
                if (startedColliders.Count > 0)
                {
                    ColliderArgs StartCollidingMessage = new ColliderArgs();
                    List<DetectedObject> colliding = new List<DetectedObject>();
                    foreach (uint localId in startedColliders)
                    {
                        if (localId == 0)
                            continue;
                        // always running this check because if the user deletes the object it would return a null reference.
                        if (m_parentGroup == null)
                            return;
                        
                        if (m_parentGroup.Scene == null)
                            return;
                        
                        SceneObjectPart obj = m_parentGroup.Scene.GetSceneObjectPart(localId);
                        string data = "";
                        if (obj != null)
                        {
                            if (m_parentGroup.RootPart.CollisionFilter.ContainsValue(obj.UUID.ToString()) || m_parentGroup.RootPart.CollisionFilter.ContainsValue(obj.Name))
                            {
                                bool found = m_parentGroup.RootPart.CollisionFilter.TryGetValue(1,out data);
                                //If it is 1, it is to accept ONLY collisions from this object
                                if (found)
                                {
                                    DetectedObject detobj = new DetectedObject();
                                    detobj.keyUUID = obj.UUID;
                                    detobj.nameStr = obj.Name;
                                    detobj.ownerUUID = obj._ownerID;
                                    detobj.posVector = obj.AbsolutePosition;
                                    detobj.rotQuat = obj.GetWorldRotation();
                                    detobj.velVector = obj.Velocity;
                                    detobj.colliderType = 0;
                                    detobj.groupUUID = obj._groupID;
                                    colliding.Add(detobj);
                                }
                                //If it is 0, it is to not accept collisions from this object
                                else
                                {
                                }
                            }
                            else
                            {
                                bool found = m_parentGroup.RootPart.CollisionFilter.TryGetValue(1,out data);
                                //If it is 1, it is to accept ONLY collisions from this object, so this other object will not work
                                if (!found)
                                {
                                    DetectedObject detobj = new DetectedObject();
                                    detobj.keyUUID = obj.UUID;
                                    detobj.nameStr = obj.Name;
                                    detobj.ownerUUID = obj._ownerID;
                                    detobj.posVector = obj.AbsolutePosition;
                                    detobj.rotQuat = obj.GetWorldRotation();
                                    detobj.velVector = obj.Velocity;
                                    detobj.colliderType = 0;
                                    detobj.groupUUID = obj._groupID;
                                    colliding.Add(detobj);
                                }
                            }
                        }
                        else
                        {
                            m_parentGroup.Scene.ForEachScenePresence(delegate(ScenePresence av)
                            {
                                if (av.LocalId == localId)
                                {
                                    if (m_parentGroup.RootPart.CollisionFilter.ContainsValue(av.UUID.ToString()) || m_parentGroup.RootPart.CollisionFilter.ContainsValue(av.Name))
                                    {
                                        bool found = m_parentGroup.RootPart.CollisionFilter.TryGetValue(1, out data);
                                        //If it is 1, it is to accept ONLY collisions from this avatar
                                        if (found)
                                        {
                                            DetectedObject detobj = new DetectedObject();
                                            detobj.keyUUID = av.UUID;
                                            detobj.nameStr = av.ControllingClient.Name;
                                            detobj.ownerUUID = av.UUID;
                                            detobj.posVector = av.AbsolutePosition;
                                            detobj.rotQuat = av.Rotation;
                                            detobj.velVector = av.Velocity;
                                            detobj.colliderType = 0;
                                            detobj.groupUUID = av.ControllingClient.ActiveGroupId;
                                            colliding.Add(detobj);
                                        }
                                        //If it is 0, it is to not accept collisions from this avatar
                                        else
                                        {
                                        }
                                    }
                                    else
                                    {
                                        bool found = m_parentGroup.RootPart.CollisionFilter.TryGetValue(1, out data);
                                        //If it is 1, it is to accept ONLY collisions from this avatar, so this other avatar will not work
                                        if (!found)
                                        {
                                            DetectedObject detobj = new DetectedObject();
                                            detobj.keyUUID = av.UUID;
                                            detobj.nameStr = av.ControllingClient.Name;
                                            detobj.ownerUUID = av.UUID;
                                            detobj.posVector = av.AbsolutePosition;
                                            detobj.rotQuat = av.Rotation;
                                            detobj.velVector = av.Velocity;
                                            detobj.colliderType = 0;
                                            detobj.groupUUID = av.ControllingClient.ActiveGroupId;
                                            colliding.Add(detobj);
                                        }
                                    }

                                }
                            });
                        }
                    }
                    if (colliding.Count > 0)
                    {
                        StartCollidingMessage.Colliders = colliding;
                        // always running this check because if the user deletes the object it would return a null reference.
                        if (m_parentGroup == null)
                            return;
                        
                        if (m_parentGroup.Scene == null)
                            return;
                        if (m_parentGroup.PassCollision == true)
                        {
                            //TODO: Add pass to root prim!
                        }
                        m_parentGroup.Scene.EventManager.TriggerScriptCollidingStart(LocalId, StartCollidingMessage);
                    }
                }
            }
            
            if ((m_parentGroup.RootPart.ScriptEvents & scriptEvents.collision) != 0)
            {
                if (m_lastColliders.Count > 0)
                {
                    ColliderArgs CollidingMessage = new ColliderArgs();
                    List<DetectedObject> colliding = new List<DetectedObject>();
                    foreach (uint localId in m_lastColliders)
                    {
                        // always running this check because if the user deletes the object it would return a null reference.
                        if (localId == 0)
                            continue;

                        if (m_parentGroup == null)
                            return;
                        
                        if (m_parentGroup.Scene == null)
                            return;
                        
                        SceneObjectPart obj = m_parentGroup.Scene.GetSceneObjectPart(localId);
                        string data = "";
                        if (obj != null)
                        {
                            if (m_parentGroup.RootPart.CollisionFilter.ContainsValue(obj.UUID.ToString()) || m_parentGroup.RootPart.CollisionFilter.ContainsValue(obj.Name))
                            {
                                bool found = m_parentGroup.RootPart.CollisionFilter.TryGetValue(1,out data);
                                //If it is 1, it is to accept ONLY collisions from this object
                                if (found)
                                {
                                    DetectedObject detobj = new DetectedObject();
                                    detobj.keyUUID = obj.UUID;
                                    detobj.nameStr = obj.Name;
                                    detobj.ownerUUID = obj._ownerID;
                                    detobj.posVector = obj.AbsolutePosition;
                                    detobj.rotQuat = obj.GetWorldRotation();
                                    detobj.velVector = obj.Velocity;
                                    detobj.colliderType = 0;
                                    detobj.groupUUID = obj._groupID;
                                    colliding.Add(detobj);
                                }
                                //If it is 0, it is to not accept collisions from this object
                                else
                                {
                                }
                            }
                            else
                            {
                                bool found = m_parentGroup.RootPart.CollisionFilter.TryGetValue(1,out data);
                                //If it is 1, it is to accept ONLY collisions from this object, so this other object will not work
                                if (!found)
                                {
                                    DetectedObject detobj = new DetectedObject();
                                    detobj.keyUUID = obj.UUID;
                                    detobj.nameStr = obj.Name;
                                    detobj.ownerUUID = obj._ownerID;
                                    detobj.posVector = obj.AbsolutePosition;
                                    detobj.rotQuat = obj.GetWorldRotation();
                                    detobj.velVector = obj.Velocity;
                                    detobj.colliderType = 0;
                                    detobj.groupUUID = obj._groupID;
                                    colliding.Add(detobj);
                                }
                            }
                        }
                        else
                        {
                            m_parentGroup.Scene.ForEachScenePresence(delegate(ScenePresence av)
                            {
                                if (av.LocalId == localId)
                                {
                                    if (m_parentGroup.RootPart.CollisionFilter.ContainsValue(av.UUID.ToString()) || m_parentGroup.RootPart.CollisionFilter.ContainsValue(av.Name))
                                    {
                                        bool found = m_parentGroup.RootPart.CollisionFilter.TryGetValue(1, out data);
                                        //If it is 1, it is to accept ONLY collisions from this avatar
                                        if (found)
                                        {
                                            DetectedObject detobj = new DetectedObject();
                                            detobj.keyUUID = av.UUID;
                                            detobj.nameStr = av.ControllingClient.Name;
                                            detobj.ownerUUID = av.UUID;
                                            detobj.posVector = av.AbsolutePosition;
                                            detobj.rotQuat = av.Rotation;
                                            detobj.velVector = av.Velocity;
                                            detobj.colliderType = 0;
                                            detobj.groupUUID = av.ControllingClient.ActiveGroupId;
                                            colliding.Add(detobj);
                                        }
                                        //If it is 0, it is to not accept collisions from this avatar
                                        else
                                        {
                                        }
                                    }
                                    else
                                    {
                                        bool found = m_parentGroup.RootPart.CollisionFilter.TryGetValue(1, out data);
                                        //If it is 1, it is to accept ONLY collisions from this avatar, so this other avatar will not work
                                        if (!found)
                                        {
                                            DetectedObject detobj = new DetectedObject();
                                            detobj.keyUUID = av.UUID;
                                            detobj.nameStr = av.ControllingClient.Name;
                                            detobj.ownerUUID = av.UUID;
                                            detobj.posVector = av.AbsolutePosition;
                                            detobj.rotQuat = av.Rotation;
                                            detobj.velVector = av.Velocity;
                                            detobj.colliderType = 0;
                                            detobj.groupUUID = av.ControllingClient.ActiveGroupId;
                                            colliding.Add(detobj);
                                        }
                                    }

                                }
                            });
                        }
                    }
                    if (colliding.Count > 0)
                    {
                        CollidingMessage.Colliders = colliding;
                        // always running this check because if the user deletes the object it would return a null reference.
                        if (m_parentGroup == null)
                            return;
                        
                        if (m_parentGroup.Scene == null)
                            return;
                        
                        m_parentGroup.Scene.EventManager.TriggerScriptColliding(LocalId, CollidingMessage);
                    }
                }
            }
            
            if ((m_parentGroup.RootPart.ScriptEvents & scriptEvents.collision_end) != 0)
            {
                if (endedColliders.Count > 0)
                {
                    ColliderArgs EndCollidingMessage = new ColliderArgs();
                    List<DetectedObject> colliding = new List<DetectedObject>();
                    foreach (uint localId in endedColliders)
                    {
                        if (localId == 0)
                            continue;

                        // always running this check because if the user deletes the object it would return a null reference.
                        if (m_parentGroup == null)
                            return;
                        if (m_parentGroup.Scene == null)
                            return;
                        SceneObjectPart obj = m_parentGroup.Scene.GetSceneObjectPart(localId);
                        string data = "";
                        if (obj != null)
                        {
                            if (m_parentGroup.RootPart.CollisionFilter.ContainsValue(obj.UUID.ToString()) || m_parentGroup.RootPart.CollisionFilter.ContainsValue(obj.Name))
                            {
                                bool found = m_parentGroup.RootPart.CollisionFilter.TryGetValue(1,out data);
                                //If it is 1, it is to accept ONLY collisions from this object
                                if (found)
                                {
                                    DetectedObject detobj = new DetectedObject();
                                    detobj.keyUUID = obj.UUID;
                                    detobj.nameStr = obj.Name;
                                    detobj.ownerUUID = obj._ownerID;
                                    detobj.posVector = obj.AbsolutePosition;
                                    detobj.rotQuat = obj.GetWorldRotation();
                                    detobj.velVector = obj.Velocity;
                                    detobj.colliderType = 0;
                                    detobj.groupUUID = obj._groupID;
                                    colliding.Add(detobj);
                                }
                                //If it is 0, it is to not accept collisions from this object
                                else
                                {
                                }
                            }
                            else
                            {
                                bool found = m_parentGroup.RootPart.CollisionFilter.TryGetValue(1,out data);
                                //If it is 1, it is to accept ONLY collisions from this object, so this other object will not work
                                if (!found)
                                {
                                    DetectedObject detobj = new DetectedObject();
                                    detobj.keyUUID = obj.UUID;
                                    detobj.nameStr = obj.Name;
                                    detobj.ownerUUID = obj._ownerID;
                                    detobj.posVector = obj.AbsolutePosition;
                                    detobj.rotQuat = obj.GetWorldRotation();
                                    detobj.velVector = obj.Velocity;
                                    detobj.colliderType = 0;
                                    detobj.groupUUID = obj._groupID;
                                    colliding.Add(detobj);
                                }
                            }
                        }
                        else
                        {
                            m_parentGroup.Scene.ForEachScenePresence(delegate(ScenePresence av)
                            {
                                if (av.LocalId == localId)
                                {
                                    if (m_parentGroup.RootPart.CollisionFilter.ContainsValue(av.UUID.ToString()) || m_parentGroup.RootPart.CollisionFilter.ContainsValue(av.Name))
                                    {
                                        bool found = m_parentGroup.RootPart.CollisionFilter.TryGetValue(1, out data);
                                        //If it is 1, it is to accept ONLY collisions from this avatar
                                        if (found)
                                        {
                                            DetectedObject detobj = new DetectedObject();
                                            detobj.keyUUID = av.UUID;
                                            detobj.nameStr = av.ControllingClient.Name;
                                            detobj.ownerUUID = av.UUID;
                                            detobj.posVector = av.AbsolutePosition;
                                            detobj.rotQuat = av.Rotation;
                                            detobj.velVector = av.Velocity;
                                            detobj.colliderType = 0;
                                            detobj.groupUUID = av.ControllingClient.ActiveGroupId;
                                            colliding.Add(detobj);
                                        }
                                        //If it is 0, it is to not accept collisions from this avatar
                                        else
                                        {
                                        }
                                    }
                                    else
                                    {
                                        bool found = m_parentGroup.RootPart.CollisionFilter.TryGetValue(1, out data);
                                        //If it is 1, it is to accept ONLY collisions from this avatar, so this other avatar will not work
                                        if (!found)
                                        {
                                            DetectedObject detobj = new DetectedObject();
                                            detobj.keyUUID = av.UUID;
                                            detobj.nameStr = av.ControllingClient.Name;
                                            detobj.ownerUUID = av.UUID;
                                            detobj.posVector = av.AbsolutePosition;
                                            detobj.rotQuat = av.Rotation;
                                            detobj.velVector = av.Velocity;
                                            detobj.colliderType = 0;
                                            detobj.groupUUID = av.ControllingClient.ActiveGroupId;
                                            colliding.Add(detobj);
                                        }
                                    }

                                }
                            });
                        }
                    }
                    
                    if (colliding.Count > 0)
                    {
                        EndCollidingMessage.Colliders = colliding;
                        // always running this check because if the user deletes the object it would return a null reference.
                        if (m_parentGroup == null)
                            return;
                        
                        if (m_parentGroup.Scene == null)
                            return;
                        
                        m_parentGroup.Scene.EventManager.TriggerScriptCollidingEnd(LocalId, EndCollidingMessage);
                    }
                }
            }
            if ((m_parentGroup.RootPart.ScriptEvents & scriptEvents.land_collision_start) != 0)
            {
                if (startedColliders.Count > 0)
                {
                    ColliderArgs LandStartCollidingMessage = new ColliderArgs();
                    List<DetectedObject> colliding = new List<DetectedObject>();
                    foreach (uint localId in startedColliders)
                    {
                        if (localId == 0)
                        {
                            //Hope that all is left is ground!
                            DetectedObject detobj = new DetectedObject();
                            detobj.keyUUID = UUID.Zero;
                            detobj.nameStr = "";
                            detobj.ownerUUID = UUID.Zero;
                            detobj.posVector = m_parentGroup.RootPart.AbsolutePosition;
                            detobj.rotQuat = Quaternion.Identity;
                            detobj.velVector = Vector3.Zero;
                            detobj.colliderType = 0;
                            detobj.groupUUID = UUID.Zero;
                            colliding.Add(detobj);
                        }
                    }

                    if (colliding.Count > 0)
                    {
                        LandStartCollidingMessage.Colliders = colliding;
                        // always running this check because if the user deletes the object it would return a null reference.
                        if (m_parentGroup == null)
                            return;

                        if (m_parentGroup.Scene == null)
                            return;

                        m_parentGroup.Scene.EventManager.TriggerScriptLandCollidingStart(LocalId, LandStartCollidingMessage);
                    }
                }
            }
            if ((m_parentGroup.RootPart.ScriptEvents & scriptEvents.land_collision) != 0)
            {
                if (m_lastColliders.Count > 0)
                {
                    ColliderArgs LandCollidingMessage = new ColliderArgs();
                    List<DetectedObject> colliding = new List<DetectedObject>();
                    foreach (uint localId in startedColliders)
                    {
                        if (localId == 0)
                        {
                            //Hope that all is left is ground!
                            DetectedObject detobj = new DetectedObject();
                            detobj.keyUUID = UUID.Zero;
                            detobj.nameStr = "";
                            detobj.ownerUUID = UUID.Zero;
                            detobj.posVector = m_parentGroup.RootPart.AbsolutePosition;
                            detobj.rotQuat = Quaternion.Identity;
                            detobj.velVector = Vector3.Zero;
                            detobj.colliderType = 0;
                            detobj.groupUUID = UUID.Zero;
                            colliding.Add(detobj);
                        }
                    }

                    if (colliding.Count > 0)
                    {
                        LandCollidingMessage.Colliders = colliding;
                        // always running this check because if the user deletes the object it would return a null reference.
                        if (m_parentGroup == null)
                            return;

                        if (m_parentGroup.Scene == null)
                            return;

                        m_parentGroup.Scene.EventManager.TriggerScriptLandColliding(LocalId, LandCollidingMessage);
                    }
                }
            }
            if ((m_parentGroup.RootPart.ScriptEvents & scriptEvents.land_collision_end) != 0)
            {
                if (endedColliders.Count > 0)
                {
                    ColliderArgs LandEndCollidingMessage = new ColliderArgs();
                    List<DetectedObject> colliding = new List<DetectedObject>();
                    foreach (uint localId in startedColliders)
                    {
                        if (localId == 0)
                        {
                            //Hope that all is left is ground!
                            DetectedObject detobj = new DetectedObject();
                            detobj.keyUUID = UUID.Zero;
                            detobj.nameStr = "";
                            detobj.ownerUUID = UUID.Zero;
                            detobj.posVector = m_parentGroup.RootPart.AbsolutePosition;
                            detobj.rotQuat = Quaternion.Identity;
                            detobj.velVector = Vector3.Zero;
                            detobj.colliderType = 0;
                            detobj.groupUUID = UUID.Zero;
                            colliding.Add(detobj);
                        }
                    }

                    if (colliding.Count > 0)
                    {
                        LandEndCollidingMessage.Colliders = colliding;
                        // always running this check because if the user deletes the object it would return a null reference.
                        if (m_parentGroup == null)
                            return;

                        if (m_parentGroup.Scene == null)
                            return;

                        m_parentGroup.Scene.EventManager.TriggerScriptLandCollidingEnd(LocalId, LandEndCollidingMessage);
                    }
                }
            }
        }

        public void PhysicsOutOfBounds(Vector3 pos)
        {
            m_log.Error("[PHYSICS]: Physical Object went out of bounds.");
            
            RemFlag(PrimFlags.Physics);
            DoPhysicsPropertyUpdate(false, true);
            //m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
        }

        public void PhysicsRequestingTerseUpdate()
        {
            if (PhysActor != null)
            {
                
                // Vector3 newpos = new Vector3(PhysActor.Position.GetBytes(), 0);
                Vector3 newpos = new Vector3(PhysActor.Position);

                if (m_parentGroup == null)
                {
                    m_log.Error("[SCENE OBJECT PART]: PhysicsRequestingTerseUpdate: m_parentGroup is null!");
                    return;
                }
                if (m_parentGroup.Scene == null)
                {
                    m_log.Error("[SCENE OBJECT PART]: PhysicsRequestingTerseUpdate: m_parentGroup.Scene is null!");
                    return;
                }
                if (m_parentGroup.Scene.TestBorderCross(newpos, Cardinals.N) | m_parentGroup.Scene.TestBorderCross(newpos, Cardinals.S) | m_parentGroup.Scene.TestBorderCross(newpos, Cardinals.E) | m_parentGroup.Scene.TestBorderCross(newpos, Cardinals.W))
                {
                    m_parentGroup.AbsolutePosition = newpos;
                    return;
                }

                // m_log.DebugFormat("[PHYSICS]: TerseUpdate: UUID={0}, newpos={1}", PhysActor.UUID.ToString(), newpos.ToString());
                //m_parentGroup.RootPart.m_groupPosition = newpos;
            }
            //ScheduleTerseUpdate();
            ScheduleTerseUpdate(new List<SceneObjectPartSyncProperties>(){SceneObjectPartSyncProperties.Position});

            //SendTerseUpdateToAllClients();
        }

        public void PreloadSound(string sound)
        {
            // UUID ownerID = OwnerID;
            UUID objectID = ParentGroup.RootPart.UUID;
            UUID soundID = UUID.Zero;

            if (!UUID.TryParse(sound, out soundID))
            {
                //Trys to fetch sound id from prim's inventory.
                //Prim's inventory doesn't support non script items yet
                
                lock (TaskInventory)
                {
                    foreach (KeyValuePair<UUID, TaskInventoryItem> item in TaskInventory)
                    {
                        if (item.Value.Name == sound)
                        {
                            soundID = item.Value.ItemID;
                            break;
                        }
                    }
                }
            }

            m_parentGroup.Scene.ForEachScenePresence(delegate(ScenePresence sp)
            {
                if (sp.IsChildAgent)
                    return;
                if (!(Util.GetDistanceTo(sp.AbsolutePosition, AbsolutePosition) >= 100))
                    sp.ControllingClient.SendPreLoadSound(objectID, objectID, soundID);
            });
        }

        public void RemFlag(PrimFlags flag)
        {
            // PrimFlags prevflag = Flags;
            if ((Flags & flag) != 0)
            {
                //m_log.Debug("Removing flag: " + ((PrimFlags)flag).ToString());
                Flags &= ~flag;
            }
            //m_log.Debug("prev: " + prevflag.ToString() + " curr: " + Flags.ToString());
            //ScheduleFullUpdate();
        }
        
        public void RemoveScriptEvents(UUID scriptid)
        {
            lock (m_scriptEvents)
            {
                if (m_scriptEvents.ContainsKey(scriptid))
                {
                    scriptEvents oldparts = scriptEvents.None;
                    oldparts = (scriptEvents) m_scriptEvents[scriptid];

                    // remove values from aggregated script events
                    AggregateScriptEvents &= ~oldparts;
                    m_scriptEvents.Remove(scriptid);
                    aggregateScriptEvents();
                }
            }
        }

        /// <summary>
        /// Reset UUIDs for this part.  This involves generate this part's own UUID and
        /// generating new UUIDs for all the items in the inventory.
        /// </summary>
        /// <param name="linkNum">Link number for the part</param>
        public void ResetIDs(int linkNum)
        {
            UUID = UUID.Random();
            LinkNum = linkNum;
            LocalId = 0;
            Inventory.ResetInventoryIDs();
        }

        /// <summary>
        /// Resize this part.
        /// </summary>
        /// <param name="scale"></param>
        public void Resize(Vector3 scale)
        {
            StoreUndoState();
            m_shape.Scale = scale;

            ParentGroup.HasGroupChanged = true;
            //ScheduleFullUpdate();
            ScheduleFullUpdate(new List<SceneObjectPartSyncProperties>(){SceneObjectPartSyncProperties.Scale});
        }
        
        public void RotLookAt(Quaternion target, float strength, float damping)
        {
            rotLookAt(target, strength, damping);
        }

        public void rotLookAt(Quaternion target, float strength, float damping)
        {
            if (IsAttachment)
            {
                /*
                    ScenePresence avatar = m_scene.GetScenePresence(rootpart.AttachedAvatar);
                    if (avatar != null)
                    {
                    Rotate the Av?
                    } */
            }
            else
            {
                APIDDamp = damping;
                APIDStrength = strength;
                APIDTarget = target;
            }
        }

        public void startLookAt(Quaternion rot, float damp, float strength)
        {
            APIDDamp = damp;
            APIDStrength = strength;
            APIDTarget = rot;
        }

        public void stopLookAt()
        {
            APIDTarget = Quaternion.Identity;
        }

        /// <summary>
        /// Schedules this prim for a full update
        /// </summary>
        //public void ScheduleFullUpdate() :: DSG SYNC: changed the interface so that we can identify which property triggers calling this function
        public virtual void ScheduleFullUpdate(List<SceneObjectPartSyncProperties> updatedProperties)
        {
//            m_log.DebugFormat("[SCENE OBJECT PART]: Scheduling full update for {0} {1}", Name, LocalId);
            
            if (m_parentGroup != null)
            {
                m_parentGroup.QueueForUpdateCheck();
            }

            int timeNow = Util.UnixTimeSinceEpoch();

            // If multiple updates are scheduled on the same second, we still need to perform all of them
            // So we'll force the issue by bumping up the timestamp so that later processing sees these need
            // to be performed.
            if (timeNow <= TimeStampFull)
            {
                TimeStampFull += 1;
            }
            else
            {
                TimeStampFull = (uint)timeNow;
            }

            m_updateFlag = 2;

            //            m_log.DebugFormat(
            //                "[SCENE OBJECT PART]: Scheduling full  update for {0}, {1} at {2}",
            //                UUID, Name, TimeStampFull);
        }

        /// <summary>
        /// Schedule a terse update for this prim.  Terse updates only send position,
        /// rotation, velocity, rotational velocity and shape information.
        /// </summary>
        //public void ScheduleTerseUpdate()
        public virtual void ScheduleTerseUpdate(List<SceneObjectPartSyncProperties> updatedProperties)
        {
            if (m_updateFlag < 1)
            {
                if (m_parentGroup != null)
                {
                    m_parentGroup.HasGroupChanged = true;
                    m_parentGroup.QueueForUpdateCheck();
                }
                TimeStampTerse = (uint) Util.UnixTimeSinceEpoch();
                m_updateFlag = 1;

                            //m_log.DebugFormat(
                            //    "[SCENE OBJECT PART]: Scheduling terse update for {0}, {1} at {2}",
                            //    UUID, Name, TimeStampTerse);
            }
        }

        public void ScriptSetPhantomStatus(bool Phantom)
        {
            if (m_parentGroup != null)
            {
                m_parentGroup.ScriptSetPhantomStatus(Phantom);
            }
        }

        public void ScriptSetTemporaryStatus(bool Temporary)
        {
            if (m_parentGroup != null)
            {
                m_parentGroup.ScriptSetTemporaryStatus(Temporary);
            }
        }

        public void ScriptSetPhysicsStatus(bool UsePhysics)
        {
            if (m_parentGroup == null)
                DoPhysicsPropertyUpdate(UsePhysics, false);
            else
                m_parentGroup.ScriptSetPhysicsStatus(UsePhysics);
        }

        public void ScriptSetVolumeDetect(bool SetVD)
        {

            if (m_parentGroup != null)
            {
                m_parentGroup.ScriptSetVolumeDetect(SetVD);
            }
        }


        public void SculptTextureCallback(UUID textureID, AssetBase texture)
        {
            if (m_shape.SculptEntry)
            {
                // commented out for sculpt map caching test - null could mean a cached sculpt map has been found
                //if (texture != null)
                {
                    if (texture != null)
                        m_shape.SculptData = texture.Data;

                    if (PhysActor != null)
                    {
                        // Tricks physics engine into thinking we've changed the part shape.
                        PrimitiveBaseShape m_newshape = m_shape.Copy();
                        PhysActor.Shape = m_newshape;
                        m_shape = m_newshape;

                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
                    }
                }
            }
        }

//        /// <summary>
//        ///
//        /// </summary>
//        /// <param name="remoteClient"></param>
//        public void SendFullUpdate(IClientAPI remoteClient, uint clientFlags)
//        {
//            m_parentGroup.SendPartFullUpdate(remoteClient, this, clientFlags);
//        }


        /// <summary>
        /// Send a full update to the client for the given part
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="clientFlags"></param>
        protected internal void SendFullUpdate(IClientAPI remoteClient, uint clientFlags)
        {
//            m_log.DebugFormat(
//                "[SOG]: Sendinging part full update to {0} for {1} {2}", remoteClient.Name, part.Name, part.LocalId);
            
            if (IsRoot)
            {
                if (IsAttachment)
                {
                    SendFullUpdateToClient(remoteClient, AttachedPos, clientFlags);
                }
                else
                {
                    SendFullUpdateToClient(remoteClient, AbsolutePosition, clientFlags);
                }
            }
            else
            {
                SendFullUpdateToClient(remoteClient, clientFlags);
            }
        }

        /// <summary>
        /// Send a full update for this part to all clients.
        /// </summary>
        public void SendFullUpdateToAllClients()
        {
            m_parentGroup.Scene.ForEachScenePresence(delegate(ScenePresence avatar)
            {
                SendFullUpdate(avatar.ControllingClient, avatar.GenerateClientFlags(UUID));
            });
        }

        /// <summary>
        /// Send a full update to all clients except the one nominated.
        /// </summary>
        /// <param name="agentID"></param>
        public void SendFullUpdateToAllClientsExcept(UUID agentID)
        {
            m_parentGroup.Scene.ForEachScenePresence(delegate(ScenePresence avatar)
            {
                // Ugly reference :(
                if (avatar.UUID != agentID)
                    SendFullUpdate(avatar.ControllingClient, avatar.GenerateClientFlags(UUID));
            });
        }

        /// <summary>
        /// Sends a full update to the client
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="clientFlags"></param>
        public void SendFullUpdateToClient(IClientAPI remoteClient, uint clientflags)
        {
            Vector3 lPos;
            lPos = OffsetPosition;
            SendFullUpdateToClient(remoteClient, lPos, clientflags);
        }

        /// <summary>
        /// Sends a full update to the client
        /// </summary>
        /// <param name="remoteClient"></param>
        /// <param name="lPos"></param>
        /// <param name="clientFlags"></param>
        public void SendFullUpdateToClient(IClientAPI remoteClient, Vector3 lPos, uint clientFlags)
        {
            // Suppress full updates during attachment editing
            //
            if (ParentGroup.IsSelected && IsAttachment)
                return;
            
            if (ParentGroup.IsDeleted)
                return;

            clientFlags &= ~(uint) PrimFlags.CreateSelected;

            if (remoteClient.AgentId == _ownerID)
            {
                if ((Flags & PrimFlags.CreateSelected) != 0)
                {
                    clientFlags |= (uint) PrimFlags.CreateSelected;
                    Flags &= ~PrimFlags.CreateSelected;
                }
            }
            //bool isattachment = IsAttachment;
            //if (LocalId != ParentGroup.RootPart.LocalId)
                //isattachment = ParentGroup.RootPart.IsAttachment;

            remoteClient.SendPrimUpdate(this, PrimUpdateFlags.FullUpdate);
        }

        /// <summary>
        /// Tell all the prims which have had updates scheduled
        /// </summary>
        public void SendScheduledUpdates()
        {
            const float ROTATION_TOLERANCE = 0.01f;
            const float VELOCITY_TOLERANCE = 0.001f;
            const float POSITION_TOLERANCE = 0.05f;
            const int TIME_MS_TOLERANCE = 3000;

            if (m_updateFlag == 1)
            {
                // Throw away duplicate or insignificant updates
                if (!RotationOffset.ApproxEquals(m_lastRotation, ROTATION_TOLERANCE) ||
                    !Acceleration.Equals(m_lastAcceleration) ||
                    !Velocity.ApproxEquals(m_lastVelocity, VELOCITY_TOLERANCE) ||
                    Velocity.ApproxEquals(Vector3.Zero, VELOCITY_TOLERANCE) ||
                    !AngularVelocity.ApproxEquals(m_lastAngularVelocity, VELOCITY_TOLERANCE) ||
                    !OffsetPosition.ApproxEquals(m_lastPosition, POSITION_TOLERANCE) ||
                    Environment.TickCount - m_lastTerseSent > TIME_MS_TOLERANCE)
                {
                    AddTerseUpdateToAllAvatars();
                    ClearUpdateSchedule();

                    // This causes the Scene to 'poll' physical objects every couple of frames
                    // bad, so it's been replaced by an event driven method.
                    //if ((ObjectFlags & (uint)PrimFlags.Physics) != 0)
                    //{
                    // Only send the constant terse updates on physical objects!
                    //ScheduleTerseUpdate();
                    //}

                    // Update the "last" values
                    m_lastPosition = OffsetPosition;
                    m_lastRotation = RotationOffset;
                    m_lastVelocity = Velocity;
                    m_lastAcceleration = Acceleration;
                    m_lastAngularVelocity = AngularVelocity;
                    m_lastTerseSent = Environment.TickCount;
                }
            }
            else
            {
                if (m_updateFlag == 2) // is a new prim, just created/reloaded or has major changes
                {
                    AddFullUpdateToAllAvatars();
                    ClearUpdateSchedule();
                }
            }
            ClearUpdateSchedule();

            //DSG SYNC
            //KittyL: 04/06/2011, No longer calling QueueSceneObjectPartForUpdate 
            //from here. Local updates are now recorded by calling IRegionSyncModule.ProcessAndEnqueuePrimUpdatesByLocal().
            /*
            if (m_parentGroup.Scene.RegionSyncModule != null)
            {                
                m_parentGroup.Scene.RegionSyncModule.QueueSceneObjectPartForUpdate((SceneObjectPart)this);
            }
             * */ 
            //end of DSG SYNC
        }

        /// <summary>
        /// Trigger or play an attached sound in this part's inventory.
        /// </summary>
        /// <param name="sound"></param>
        /// <param name="volume"></param>
        /// <param name="triggered"></param>
        /// <param name="flags"></param>
        public void SendSound(string sound, double volume, bool triggered, byte flags, float radius, bool useMaster, bool isMaster)
        {
            if (volume > 1)
                volume = 1;
            if (volume < 0)
                volume = 0;

            UUID ownerID = _ownerID;
            UUID objectID = ParentGroup.RootPart.UUID;
            UUID parentID = GetRootPartUUID();

            UUID soundID = UUID.Zero;
            Vector3 position = AbsolutePosition; // region local
            ulong regionHandle = m_parentGroup.Scene.RegionInfo.RegionHandle;

            if (!UUID.TryParse(sound, out soundID))
            {
                // search sound file from inventory
                lock (TaskInventory)
                {
                    foreach (KeyValuePair<UUID, TaskInventoryItem> item in TaskInventory)
                    {
                        if (item.Value.Name == sound && item.Value.Type == (int)AssetType.Sound)
                        {
                            soundID = item.Value.ItemID;
                            break;
                        }
                    }
                }
            }

            if (soundID == UUID.Zero)
                return;

            ISoundModule soundModule = m_parentGroup.Scene.RequestModuleInterface<ISoundModule>();
            if (soundModule != null)
            {
                if (useMaster)
                {
                    if (isMaster)
                    {
                        if (triggered)
                            soundModule.TriggerSound(soundID, ownerID, objectID, parentID, volume, position, regionHandle, radius);
                        else
                            soundModule.PlayAttachedSound(soundID, ownerID, objectID, volume, position, flags, radius);
                        ParentGroup.PlaySoundMasterPrim = (SceneObjectPart)this;
                        ownerID = _ownerID;
                        objectID = ParentGroup.RootPart.UUID;
                        parentID = GetRootPartUUID();
                        position = AbsolutePosition; // region local
                        regionHandle = ParentGroup.Scene.RegionInfo.RegionHandle;
                        if (triggered)
                            soundModule.TriggerSound(soundID, ownerID, objectID, parentID, volume, position, regionHandle, radius);
                        else
                            soundModule.PlayAttachedSound(soundID, ownerID, objectID, volume, position, flags, radius);
                        foreach (SceneObjectPart prim in ParentGroup.PlaySoundSlavePrims)
                        {
                            ownerID = prim._ownerID;
                            objectID = prim.ParentGroup.RootPart.UUID;
                            parentID = prim.GetRootPartUUID();
                            position = prim.AbsolutePosition; // region local
                            regionHandle = prim.ParentGroup.Scene.RegionInfo.RegionHandle;
                            if (triggered)
                                soundModule.TriggerSound(soundID, ownerID, objectID, parentID, volume, position, regionHandle, radius);
                            else
                                soundModule.PlayAttachedSound(soundID, ownerID, objectID, volume, position, flags, radius);
                        }
                        ParentGroup.PlaySoundSlavePrims.Clear();
                        ParentGroup.PlaySoundMasterPrim = null;
                    }
                    else
                    {
                        ParentGroup.PlaySoundSlavePrims.Add((SceneObjectPart)this);
                    }
                }
                else
                {
                    if (triggered)
                        soundModule.TriggerSound(soundID, ownerID, objectID, parentID, volume, position, regionHandle, radius);
                    else
                        soundModule.PlayAttachedSound(soundID, ownerID, objectID, volume, position, flags, radius);
                }
            }
        }

        /// <summary>
        /// Send a terse update to all clients
        /// </summary>
        public void SendTerseUpdateToAllClients()
        {
            m_parentGroup.Scene.ForEachScenePresence(delegate(ScenePresence avatar)
            {
                SendTerseUpdateToClient(avatar.ControllingClient);
            });
        }

        public void SetAttachmentPoint(uint AttachmentPoint)
        {
            this.AttachmentPoint = AttachmentPoint;

            if (AttachmentPoint != 0)
            {
                IsAttachment = true;
            }
            else
            {
                IsAttachment = false;
            }

            // save the attachment point.
            //if (AttachmentPoint != 0)
            //{
                m_shape.State = (byte)AttachmentPoint;
            //}
        }

        public void SetAxisRotation(int axis, int rotate)
        {
            if (m_parentGroup != null)
            {
                m_parentGroup.SetAxisRotation(axis, rotate);
            }
            //Cannot use ScriptBaseClass constants as no referance to it currently.
            if (axis == 2)//STATUS_ROTATE_X
                STATUS_ROTATE_X = rotate;
            if (axis == 4)//STATUS_ROTATE_Y
                STATUS_ROTATE_Y = rotate;
            if (axis == 8)//STATUS_ROTATE_Z
                STATUS_ROTATE_Z = rotate;
        }

        public void SetBuoyancy(float fvalue)
        {
            if (PhysActor != null)
            {
                PhysActor.Buoyancy = fvalue;
            }
        }

        public void SetDieAtEdge(bool p)
        {
            if (m_parentGroup == null)
                return;
            if (m_parentGroup.IsDeleted)
                return;

            m_parentGroup.RootPart.DIE_AT_EDGE = p;
        }

        public void SetFloatOnWater(int floatYN)
        {
            if (PhysActor != null)
            {
                if (floatYN == 1)
                {
                    PhysActor.FloatOnWater = true;
                }
                else
                {
                    PhysActor.FloatOnWater = false;
                }
            }
        }

        public void SetForce(Vector3 force)
        {
            if (PhysActor != null)
            {
                PhysActor.Force = force;
            }
        }

        public void SetVehicleType(int type)
        {
            if (PhysActor != null)
            {
                PhysActor.VehicleType = type;
            }
        }

        public void SetVehicleFloatParam(int param, float value)
        {
            if (PhysActor != null)
            {
                PhysActor.VehicleFloatParam(param, value);
            }
        }

        public void SetVehicleVectorParam(int param, Vector3 value)
        {
            if (PhysActor != null)
            {
                PhysActor.VehicleVectorParam(param, value);
            }
        }

        public void SetVehicleRotationParam(int param, Quaternion rotation)
        {
            if (PhysActor != null)
            {
                PhysActor.VehicleRotationParam(param, rotation);
            }
        }

        /// <summary>
        /// Set the color of prim faces
        /// </summary>
        /// <param name="color"></param>
        /// <param name="face"></param>
        public void SetFaceColor(Vector3 color, int face)
        {
            Primitive.TextureEntry tex = Shape.Textures;
            Color4 texcolor;
            if (face >= 0 && face < GetNumberOfSides())
            {
                texcolor = tex.CreateFace((uint)face).RGBA;
                texcolor.R = Util.Clip((float)color.X, 0.0f, 1.0f);
                texcolor.G = Util.Clip((float)color.Y, 0.0f, 1.0f);
                texcolor.B = Util.Clip((float)color.Z, 0.0f, 1.0f);
                tex.FaceTextures[face].RGBA = texcolor;
                UpdateTexture(tex);
                TriggerScriptChangedEvent(Changed.COLOR);
                return;
            }
            else if (face == ALL_SIDES)
            {
                for (uint i = 0; i < GetNumberOfSides(); i++)
                {
                    if (tex.FaceTextures[i] != null)
                    {
                        texcolor = tex.FaceTextures[i].RGBA;
                        texcolor.R = Util.Clip((float)color.X, 0.0f, 1.0f);
                        texcolor.G = Util.Clip((float)color.Y, 0.0f, 1.0f);
                        texcolor.B = Util.Clip((float)color.Z, 0.0f, 1.0f);
                        tex.FaceTextures[i].RGBA = texcolor;
                    }
                    texcolor = tex.DefaultTexture.RGBA;
                    texcolor.R = Util.Clip((float)color.X, 0.0f, 1.0f);
                    texcolor.G = Util.Clip((float)color.Y, 0.0f, 1.0f);
                    texcolor.B = Util.Clip((float)color.Z, 0.0f, 1.0f);
                    tex.DefaultTexture.RGBA = texcolor;
                }
                UpdateTexture(tex);
                TriggerScriptChangedEvent(Changed.COLOR);
                return;
            }
        }

        /// <summary>
        /// Get the number of sides that this part has.
        /// </summary>
        /// <returns></returns>
        public int GetNumberOfSides()
        {
            int ret = 0;
            bool hasCut;
            bool hasHollow;
            bool hasDimple;
            bool hasProfileCut;

            PrimType primType = GetPrimType();
            HasCutHollowDimpleProfileCut(primType, Shape, out hasCut, out hasHollow, out hasDimple, out hasProfileCut);

            switch (primType)
            {
                case PrimType.BOX:
                    ret = 6;
                    if (hasCut) ret += 2;
                    if (hasHollow) ret += 1;
                    break;
                case PrimType.CYLINDER:
                    ret = 3;
                    if (hasCut) ret += 2;
                    if (hasHollow) ret += 1;
                    break;
                case PrimType.PRISM:
                    ret = 5;
                    if (hasCut) ret += 2;
                    if (hasHollow) ret += 1;
                    break;
                case PrimType.SPHERE:
                    ret = 1;
                    if (hasCut) ret += 2;
                    if (hasDimple) ret += 2;
                    if (hasHollow) ret += 1;
                    break;
                case PrimType.TORUS:
                    ret = 1;
                    if (hasCut) ret += 2;
                    if (hasProfileCut) ret += 2;
                    if (hasHollow) ret += 1;
                    break;
                case PrimType.TUBE:
                    ret = 4;
                    if (hasCut) ret += 2;
                    if (hasProfileCut) ret += 2;
                    if (hasHollow) ret += 1;
                    break;
                case PrimType.RING:
                    ret = 3;
                    if (hasCut) ret += 2;
                    if (hasProfileCut) ret += 2;
                    if (hasHollow) ret += 1;
                    break;
                case PrimType.SCULPT:
                    ret = 1;
                    break;
            }
            return ret;
        }

        /// <summary>
        /// Tell us what type this prim is
        /// </summary>
        /// <param name="primShape"></param>
        /// <returns></returns>
        public PrimType GetPrimType()
        {
            if (Shape.SculptEntry)
                return PrimType.SCULPT;
            if ((Shape.ProfileCurve & 0x07) == (byte)ProfileShape.Square)
            {
                if (Shape.PathCurve == (byte)Extrusion.Straight)
                    return PrimType.BOX;
                else if (Shape.PathCurve == (byte)Extrusion.Curve1)
                    return PrimType.TUBE;
            }
            else if ((Shape.ProfileCurve & 0x07) == (byte)ProfileShape.Circle)
            {
                if (Shape.PathCurve == (byte)Extrusion.Straight)
                    return PrimType.CYLINDER;
                // ProfileCurve seems to combine hole shape and profile curve so we need to only compare against the lower 3 bits
                else if (Shape.PathCurve == (byte)Extrusion.Curve1)
                    return PrimType.TORUS;
            }
            else if ((Shape.ProfileCurve & 0x07) == (byte)ProfileShape.HalfCircle)
            {
                if (Shape.PathCurve == (byte)Extrusion.Curve1 || Shape.PathCurve == (byte)Extrusion.Curve2)
                    return PrimType.SPHERE;
            }
            else if ((Shape.ProfileCurve & 0x07) == (byte)ProfileShape.EquilateralTriangle)
            {
                if (Shape.PathCurve == (byte)Extrusion.Straight)
                    return PrimType.PRISM;
                else if (Shape.PathCurve == (byte)Extrusion.Curve1)
                    return PrimType.RING;
            }
            
            return PrimType.BOX;
        }
        
        /// <summary>
        /// Tell us if this object has cut, hollow, dimple, and other factors affecting the number of faces 
        /// </summary>
        /// <param name="primType"></param>
        /// <param name="shape"></param>
        /// <param name="hasCut"></param>
        /// <param name="hasHollow"></param>
        /// <param name="hasDimple"></param>
        /// <param name="hasProfileCut"></param>
        protected static void HasCutHollowDimpleProfileCut(PrimType primType, PrimitiveBaseShape shape, out bool hasCut, out bool hasHollow,
            out bool hasDimple, out bool hasProfileCut)
        {
            if (primType == PrimType.BOX
                ||
                primType == PrimType.CYLINDER
                ||
                primType == PrimType.PRISM)

                hasCut = (shape.ProfileBegin > 0) || (shape.ProfileEnd > 0);
            else
                hasCut = (shape.PathBegin > 0) || (shape.PathEnd > 0);

            hasHollow = shape.ProfileHollow > 0;
            hasDimple = (shape.ProfileBegin > 0) || (shape.ProfileEnd > 0); // taken from llSetPrimitiveParms
            hasProfileCut = hasDimple; // is it the same thing?
        }
        
        public void SetVehicleFlags(int param, bool remove)
        {
            if (PhysActor != null)
            {
                PhysActor.VehicleFlags(param, remove);
            }
        }

        public void SetGroup(UUID groupID, IClientAPI client)
        {
            _groupID = groupID;
            if (client != null)
                GetProperties(client);
            m_updateFlag = 2;
        }

        /// <summary>
        ///
        /// </summary>
        public void SetParent(SceneObjectGroup parent)
        {
            m_parentGroup = parent;
        }

        // Use this for attachments!  LocalID should be avatar's localid
        public void SetParentLocalId(uint localID)
        {
            _parentID = localID;
        }

        public void SetPhysicsAxisRotation()
        {
            if (PhysActor != null)
            {
                PhysActor.LockAngularMotion(RotationAxis);
                m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
            }
        }

        /// <summary>
        /// Set the events that this part will pass on to listeners.
        /// </summary>
        /// <param name="scriptid"></param>
        /// <param name="events"></param>
        public void SetScriptEvents(UUID scriptid, int events)
        {
            // scriptEvents oldparts;
            lock (m_scriptEvents)
            {
                if (m_scriptEvents.ContainsKey(scriptid))
                {
                    // oldparts = m_scriptEvents[scriptid];

                    // remove values from aggregated script events
                    if (m_scriptEvents[scriptid] == (scriptEvents) events)
                        return;
                    m_scriptEvents[scriptid] = (scriptEvents) events;
                }
                else
                {
                    m_scriptEvents.Add(scriptid, (scriptEvents) events);
                }
            }
            aggregateScriptEvents();
        }

        /// <summary>
        /// Set the text displayed for this part.
        /// </summary>
        /// <param name="text"></param>
        public void SetText(string text)
        {
            Text = text;

            ParentGroup.HasGroupChanged = true;
            //ScheduleFullUpdate();
            ScheduleFullUpdate(new List<SceneObjectPartSyncProperties>(){SceneObjectPartSyncProperties.Text});
        }
        
        public void StopLookAt()
        {
            m_parentGroup.stopLookAt();

            //m_parentGroup.ScheduleGroupForTerseUpdate();
            m_parentGroup.ScheduleGroupForTerseUpdate(new List<SceneObjectPartSyncProperties>(){SceneObjectPartSyncProperties.None});//in stopLookAt(), PhysicsActor shall already take care of tainting which properties have been updated 
        }
        
        /// <summary>
        /// Set the text displayed for this part.
        /// </summary>
        /// <param name="text"></param>
        /// <param name="color"></param>
        /// <param name="alpha"></param>
        public void SetText(string text, Vector3 color, double alpha)
        {
            Color = Color.FromArgb((int) (alpha*0xff),
                                   (int) (color.X*0xff),
                                   (int) (color.Y*0xff),
                                   (int) (color.Z*0xff));
            SetText(text);
        }

        public void StopMoveToTarget()
        {
            m_parentGroup.stopMoveToTarget();

            //m_parentGroup.ScheduleGroupForTerseUpdate();
            m_parentGroup.ScheduleGroupForTerseUpdate(new List<SceneObjectPartSyncProperties>(){SceneObjectPartSyncProperties.None}); //in stopMoveToTarget(), PhysicsActor shall already take care of tainting which properties have been updated 
            //m_parentGroup.ScheduleGroupForFullUpdate();
        }

        public void StoreUndoState()
        {
            if (!Undoing)
            {
                if (!IgnoreUndoUpdate)
                {
                    if (m_parentGroup != null)
                    {
                        lock (m_undo)
                        {
                            if (m_undo.Count > 0)
                            {
                                UndoState last = m_undo.Peek();
                                if (last != null)
                                {
                                    if (last.Compare((SceneObjectPart)this))
                                        return;
                                }
                            }

                            if (m_parentGroup.GetSceneMaxUndo() > 0)
                            {
                                UndoState nUndo = new UndoState((SceneObjectPart)this);

                                m_undo.Push(nUndo);
                            }

                        }
                    }
                }
            }
        }

        public EntityIntersection TestIntersection(Ray iray, Quaternion parentrot)
        {
            // In this case we're using a sphere with a radius of the largest dimension of the prim
            // TODO: Change to take shape into account

            EntityIntersection result = new EntityIntersection();
            Vector3 vAbsolutePosition = AbsolutePosition;
            Vector3 vScale = Scale;
            Vector3 rOrigin = iray.Origin;
            Vector3 rDirection = iray.Direction;

            //rDirection = rDirection.Normalize();
            // Buidling the first part of the Quadratic equation
            Vector3 r2ndDirection = rDirection*rDirection;
            float itestPart1 = r2ndDirection.X + r2ndDirection.Y + r2ndDirection.Z;

            // Buidling the second part of the Quadratic equation
            Vector3 tmVal2 = rOrigin - vAbsolutePosition;
            Vector3 r2Direction = rDirection*2.0f;
            Vector3 tmVal3 = r2Direction*tmVal2;

            float itestPart2 = tmVal3.X + tmVal3.Y + tmVal3.Z;

            // Buidling the third part of the Quadratic equation
            Vector3 tmVal4 = rOrigin*rOrigin;
            Vector3 tmVal5 = vAbsolutePosition*vAbsolutePosition;

            Vector3 tmVal6 = vAbsolutePosition*rOrigin;

            // Set Radius to the largest dimension of the prim
            float radius = 0f;
            if (vScale.X > radius)
                radius = vScale.X;
            if (vScale.Y > radius)
                radius = vScale.Y;
            if (vScale.Z > radius)
                radius = vScale.Z;

            // the second part of this is the default prim size
            // once we factor in the aabb of the prim we're adding we can
            // change this to;
            // radius = (radius / 2) - 0.01f;
            //
            radius = (radius / 2) + (0.5f / 2) - 0.1f;

            //radius = radius;

            float itestPart3 = tmVal4.X + tmVal4.Y + tmVal4.Z + tmVal5.X + tmVal5.Y + tmVal5.Z -
                               (2.0f*(tmVal6.X + tmVal6.Y + tmVal6.Z + (radius*radius)));

            // Yuk Quadradrics..    Solve first
            float rootsqr = (itestPart2*itestPart2) - (4.0f*itestPart1*itestPart3);
            if (rootsqr < 0.0f)
            {
                // No intersection
                return result;
            }
            float root = ((-itestPart2) - (float) Math.Sqrt((double) rootsqr))/(itestPart1*2.0f);

            if (root < 0.0f)
            {
                // perform second quadratic root solution
                root = ((-itestPart2) + (float) Math.Sqrt((double) rootsqr))/(itestPart1*2.0f);

                // is there any intersection?
                if (root < 0.0f)
                {
                    // nope, no intersection
                    return result;
                }
            }

            // We got an intersection.  putting together an EntityIntersection object with the
            // intersection information
            Vector3 ipoint =
                new Vector3(iray.Origin.X + (iray.Direction.X*root), iray.Origin.Y + (iray.Direction.Y*root),
                            iray.Origin.Z + (iray.Direction.Z*root));

            result.HitTF = true;
            result.ipoint = ipoint;

            // Normal is calculated by the difference and then normalizing the result
            Vector3 normalpart = ipoint - vAbsolutePosition;
            result.normal = normalpart / normalpart.Length();

            // It's funny how the Vector3 object has a Distance function, but the Axiom.Math object doesn't.
            // I can write a function to do it..    but I like the fact that this one is Static.

            Vector3 distanceConvert1 = new Vector3(iray.Origin.X, iray.Origin.Y, iray.Origin.Z);
            Vector3 distanceConvert2 = new Vector3(ipoint.X, ipoint.Y, ipoint.Z);
            float distance = (float) Util.GetDistanceTo(distanceConvert1, distanceConvert2);

            result.distance = distance;

            return result;
        }

        public EntityIntersection TestIntersectionOBB(Ray iray, Quaternion parentrot, bool frontFacesOnly, bool faceCenters)
        {
            // In this case we're using a rectangular prism, which has 6 faces and therefore 6 planes
            // This breaks down into the ray---> plane equation.
            // TODO: Change to take shape into account
            Vector3[] vertexes = new Vector3[8];

            // float[] distance = new float[6];
            Vector3[] FaceA = new Vector3[6]; // vertex A for Facei
            Vector3[] FaceB = new Vector3[6]; // vertex B for Facei
            Vector3[] FaceC = new Vector3[6]; // vertex C for Facei
            Vector3[] FaceD = new Vector3[6]; // vertex D for Facei

            Vector3[] normals = new Vector3[6]; // Normal for Facei
            Vector3[] AAfacenormals = new Vector3[6]; // Axis Aligned face normals

            AAfacenormals[0] = new Vector3(1, 0, 0);
            AAfacenormals[1] = new Vector3(0, 1, 0);
            AAfacenormals[2] = new Vector3(-1, 0, 0);
            AAfacenormals[3] = new Vector3(0, -1, 0);
            AAfacenormals[4] = new Vector3(0, 0, 1);
            AAfacenormals[5] = new Vector3(0, 0, -1);

            Vector3 AmBa = new Vector3(0, 0, 0); // Vertex A - Vertex B
            Vector3 AmBb = new Vector3(0, 0, 0); // Vertex B - Vertex C
            Vector3 cross = new Vector3();

            Vector3 pos = GetWorldPosition();
            Quaternion rot = GetWorldRotation();

            // Variables prefixed with AX are Axiom.Math copies of the LL variety.

            Quaternion AXrot = rot;
            AXrot.Normalize();

            Vector3 AXpos = pos;

            // tScale is the offset to derive the vertex based on the scale.
            // it's different for each vertex because we've got to rotate it
            // to get the world position of the vertex to produce the Oriented Bounding Box

            Vector3 tScale = Vector3.Zero;

            Vector3 AXscale = new Vector3(m_shape.Scale.X * 0.5f, m_shape.Scale.Y * 0.5f, m_shape.Scale.Z * 0.5f);

            //Vector3 pScale = (AXscale) - (AXrot.Inverse() * (AXscale));
            //Vector3 nScale = (AXscale * -1) - (AXrot.Inverse() * (AXscale * -1));

            // rScale is the rotated offset to find a vertex based on the scale and the world rotation.
            Vector3 rScale = new Vector3();

            // Get Vertexes for Faces Stick them into ABCD for each Face
            // Form: Face<vertex>[face] that corresponds to the below diagram
            #region ABCD Face Vertex Map Comment Diagram
            //                   A _________ B
            //                    |         |
            //                    |  4 top  |
            //                    |_________|
            //                   C           D

            //                   A _________ B
            //                    |  Back   |
            //                    |    3    |
            //                    |_________|
            //                   C           D

            //   A _________ B                     B _________ A
            //    |  Left   |                       |  Right  |
            //    |    0    |                       |    2    |
            //    |_________|                       |_________|
            //   C           D                     D           C

            //                   A _________ B
            //                    |  Front  |
            //                    |    1    |
            //                    |_________|
            //                   C           D

            //                   C _________ D
            //                    |         |
            //                    |  5 bot  |
            //                    |_________|
            //                   A           B
            #endregion

            #region Plane Decomposition of Oriented Bounding Box
            tScale = new Vector3(AXscale.X, -AXscale.Y, AXscale.Z);
            rScale = tScale * AXrot;
            vertexes[0] = (new Vector3((pos.X + rScale.X), (pos.Y + rScale.Y), (pos.Z + rScale.Z)));
               // vertexes[0].X = pos.X + vertexes[0].X;
            //vertexes[0].Y = pos.Y + vertexes[0].Y;
            //vertexes[0].Z = pos.Z + vertexes[0].Z;

            FaceA[0] = vertexes[0];
            FaceB[3] = vertexes[0];
            FaceA[4] = vertexes[0];

            tScale = AXscale;
            rScale = tScale * AXrot;
            vertexes[1] = (new Vector3((pos.X + rScale.X), (pos.Y + rScale.Y), (pos.Z + rScale.Z)));

               // vertexes[1].X = pos.X + vertexes[1].X;
               // vertexes[1].Y = pos.Y + vertexes[1].Y;
            //vertexes[1].Z = pos.Z + vertexes[1].Z;

            FaceB[0] = vertexes[1];
            FaceA[1] = vertexes[1];
            FaceC[4] = vertexes[1];

            tScale = new Vector3(AXscale.X, -AXscale.Y, -AXscale.Z);
            rScale = tScale * AXrot;

            vertexes[2] = (new Vector3((pos.X + rScale.X), (pos.Y + rScale.Y), (pos.Z + rScale.Z)));

            //vertexes[2].X = pos.X + vertexes[2].X;
            //vertexes[2].Y = pos.Y + vertexes[2].Y;
            //vertexes[2].Z = pos.Z + vertexes[2].Z;

            FaceC[0] = vertexes[2];
            FaceD[3] = vertexes[2];
            FaceC[5] = vertexes[2];

            tScale = new Vector3(AXscale.X, AXscale.Y, -AXscale.Z);
            rScale = tScale * AXrot;
            vertexes[3] = (new Vector3((pos.X + rScale.X), (pos.Y + rScale.Y), (pos.Z + rScale.Z)));

            //vertexes[3].X = pos.X + vertexes[3].X;
               // vertexes[3].Y = pos.Y + vertexes[3].Y;
               // vertexes[3].Z = pos.Z + vertexes[3].Z;

            FaceD[0] = vertexes[3];
            FaceC[1] = vertexes[3];
            FaceA[5] = vertexes[3];

            tScale = new Vector3(-AXscale.X, AXscale.Y, AXscale.Z);
            rScale = tScale * AXrot;
            vertexes[4] = (new Vector3((pos.X + rScale.X), (pos.Y + rScale.Y), (pos.Z + rScale.Z)));

               // vertexes[4].X = pos.X + vertexes[4].X;
               // vertexes[4].Y = pos.Y + vertexes[4].Y;
               // vertexes[4].Z = pos.Z + vertexes[4].Z;

            FaceB[1] = vertexes[4];
            FaceA[2] = vertexes[4];
            FaceD[4] = vertexes[4];

            tScale = new Vector3(-AXscale.X, AXscale.Y, -AXscale.Z);
            rScale = tScale * AXrot;
            vertexes[5] = (new Vector3((pos.X + rScale.X), (pos.Y + rScale.Y), (pos.Z + rScale.Z)));

               // vertexes[5].X = pos.X + vertexes[5].X;
               // vertexes[5].Y = pos.Y + vertexes[5].Y;
               // vertexes[5].Z = pos.Z + vertexes[5].Z;

            FaceD[1] = vertexes[5];
            FaceC[2] = vertexes[5];
            FaceB[5] = vertexes[5];

            tScale = new Vector3(-AXscale.X, -AXscale.Y, AXscale.Z);
            rScale = tScale * AXrot;
            vertexes[6] = (new Vector3((pos.X + rScale.X), (pos.Y + rScale.Y), (pos.Z + rScale.Z)));

               // vertexes[6].X = pos.X + vertexes[6].X;
               // vertexes[6].Y = pos.Y + vertexes[6].Y;
               // vertexes[6].Z = pos.Z + vertexes[6].Z;

            FaceB[2] = vertexes[6];
            FaceA[3] = vertexes[6];
            FaceB[4] = vertexes[6];

            tScale = new Vector3(-AXscale.X, -AXscale.Y, -AXscale.Z);
            rScale = tScale * AXrot;
            vertexes[7] = (new Vector3((pos.X + rScale.X), (pos.Y + rScale.Y), (pos.Z + rScale.Z)));

               // vertexes[7].X = pos.X + vertexes[7].X;
               // vertexes[7].Y = pos.Y + vertexes[7].Y;
               // vertexes[7].Z = pos.Z + vertexes[7].Z;

            FaceD[2] = vertexes[7];
            FaceC[3] = vertexes[7];
            FaceD[5] = vertexes[7];
            #endregion

            // Get our plane normals
            for (int i = 0; i < 6; i++)
            {
                //m_log.Info("[FACECALCULATION]: FaceA[" + i + "]=" + FaceA[i] + " FaceB[" + i + "]=" + FaceB[i] + " FaceC[" + i + "]=" + FaceC[i] + " FaceD[" + i + "]=" + FaceD[i]);

                // Our Plane direction
                AmBa = FaceA[i] - FaceB[i];
                AmBb = FaceB[i] - FaceC[i];

                cross = Vector3.Cross(AmBb, AmBa);

                // normalize the cross product to get the normal.
                normals[i] = cross / cross.Length();

                //m_log.Info("[NORMALS]: normals[ " + i + "]" + normals[i].ToString());
                //distance[i] = (normals[i].X * AmBa.X + normals[i].Y * AmBa.Y + normals[i].Z * AmBa.Z) * -1;
            }

            EntityIntersection result = new EntityIntersection();

            result.distance = 1024;
            float c = 0;
            float a = 0;
            float d = 0;
            Vector3 q = new Vector3();

            #region OBB Version 2 Experiment
            //float fmin = 999999;
            //float fmax = -999999;
            //float s = 0;

            //for (int i=0;i<6;i++)
            //{
                //s = iray.Direction.Dot(normals[i]);
                //d = normals[i].Dot(FaceB[i]);

                //if (s == 0)
                //{
                    //if (iray.Origin.Dot(normals[i]) > d)
                    //{
                        //return result;
                    //}
                   // else
                    //{
                        //continue;
                    //}
                //}
                //a = (d - iray.Origin.Dot(normals[i])) / s;
                //if (iray.Direction.Dot(normals[i]) < 0)
                //{
                    //if (a > fmax)
                    //{
                        //if (a > fmin)
                        //{
                            //return result;
                        //}
                        //fmax = a;
                    //}

                //}
                //else
                //{
                    //if (a < fmin)
                    //{
                        //if (a < 0 || a < fmax)
                        //{
                            //return result;
                        //}
                        //fmin = a;
                    //}
                //}
            //}
            //if (fmax > 0)
            //    a= fmax;
            //else
               //     a=fmin;

            //q = iray.Origin + a * iray.Direction;
            #endregion

            // Loop over faces (6 of them)
            for (int i = 0; i < 6; i++)
            {
                AmBa = FaceA[i] - FaceB[i];
                AmBb = FaceB[i] - FaceC[i];
                d = Vector3.Dot(normals[i], FaceB[i]);

                //if (faceCenters)
                //{
                //    c = normals[i].Dot(normals[i]);
                //}
                //else
                //{
                c = Vector3.Dot(iray.Direction, normals[i]);
                //}
                if (c == 0)
                    continue;

                a = (d - Vector3.Dot(iray.Origin, normals[i])) / c;

                if (a < 0)
                    continue;

                // If the normal is pointing outside the object
                if (Vector3.Dot(iray.Direction, normals[i]) < 0 || !frontFacesOnly)
                {
                    //if (faceCenters)
                    //{   //(FaceA[i] + FaceB[i] + FaceC[1] + FaceD[i]) / 4f;
                    //    q =  iray.Origin + a * normals[i];
                    //}
                    //else
                    //{
                        q = iray.Origin + iray.Direction * a;
                    //}

                    float distance2 = (float)GetDistanceTo(q, AXpos);
                    // Is this the closest hit to the object's origin?
                    //if (faceCenters)
                    //{
                    //    distance2 = (float)GetDistanceTo(q, iray.Origin);
                    //}

                    if (distance2 < result.distance)
                    {
                        result.distance = distance2;
                        result.HitTF = true;
                        result.ipoint = q;
                        //m_log.Info("[FACE]:" + i.ToString());
                        //m_log.Info("[POINT]: " + q.ToString());
                        //m_log.Info("[DIST]: " + distance2.ToString());
                        if (faceCenters)
                        {
                            result.normal = AAfacenormals[i] * AXrot;

                            Vector3 scaleComponent = AAfacenormals[i];
                            float ScaleOffset = 0.5f;
                            if (scaleComponent.X != 0) ScaleOffset = AXscale.X;
                            if (scaleComponent.Y != 0) ScaleOffset = AXscale.Y;
                            if (scaleComponent.Z != 0) ScaleOffset = AXscale.Z;
                            ScaleOffset = Math.Abs(ScaleOffset);
                            Vector3 offset = result.normal * ScaleOffset;
                            result.ipoint = AXpos + offset;

                            ///pos = (intersectionpoint + offset);
                        }
                        else
                        {
                            result.normal = normals[i];
                        }
                        result.AAfaceNormal = AAfacenormals[i];
                    }
                }
            }
            return result;
        }

        /// <summary>
        /// Serialize this part to xml.
        /// </summary>
        /// <param name="xmlWriter"></param>
        public void ToXml(XmlTextWriter xmlWriter)
        {
            SceneObjectSerializer.SOPToXml2(xmlWriter, (SceneObjectPart)this, new Dictionary<string, object>());
        }

        public void TriggerScriptChangedEvent(Changed val)
        {
            if (m_parentGroup != null && m_parentGroup.Scene != null)
                m_parentGroup.Scene.EventManager.TriggerOnScriptChangedEvent(LocalId, (uint)val);
        }

        public void TrimPermissions()
        {
            _baseMask &= (uint)PermissionMask.All;
            _ownerMask &= (uint)PermissionMask.All;
            _groupMask &= (uint)PermissionMask.All;
            _everyoneMask &= (uint)PermissionMask.All;
            _nextOwnerMask &= (uint)PermissionMask.All;
        }

        public void Undo()
        {
            lock (m_undo)
            {
                if (m_undo.Count > 0)
                {
                    UndoState nUndo = null;
                    if (m_parentGroup.GetSceneMaxUndo() > 0)
                    {
                        nUndo = new UndoState((SceneObjectPart)this);
                    }
                    UndoState goback = m_undo.Pop();
                    if (goback != null)
                    {
                        goback.PlaybackState((SceneObjectPart)this);
                        if (nUndo != null)
                            m_redo.Push(nUndo);
                    }
                }
            }
        }

        public void Redo()
        {
            lock (m_redo)
            {
                if (m_parentGroup.GetSceneMaxUndo() > 0)
                {
                    UndoState nUndo = new UndoState((SceneObjectPart)this);

                    m_undo.Push(nUndo);
                }
                UndoState gofwd = m_redo.Pop();
                if (gofwd != null)
                    gofwd.PlayfwdState((SceneObjectPart)this);
            }
        }

        public void UpdateExtraParam(ushort type, bool inUse, byte[] data)
        {
            m_shape.ReadInUpdateExtraParam(type, inUse, data);

            if (type == 0x30)
            {
                if (m_shape.SculptEntry && m_shape.SculptTexture != UUID.Zero)
                {
                    m_parentGroup.Scene.AssetService.Get(m_shape.SculptTexture.ToString(), this, AssetReceived);
                }
            }

            ParentGroup.HasGroupChanged = true;
            //ScheduleFullUpdate();
            ScheduleFullUpdate(new List<SceneObjectPartSyncProperties>(){SceneObjectPartSyncProperties.Shape});
        }

        public void UpdateGroupPosition(Vector3 pos)
        {
            if ((pos.X != GroupPosition.X) ||
                (pos.Y != GroupPosition.Y) ||
                (pos.Z != GroupPosition.Z))
            {
                Vector3 newPos = new Vector3(pos.X, pos.Y, pos.Z);
                GroupPosition = newPos;
                //ScheduleTerseUpdate();
                ScheduleFullUpdate(new List<SceneObjectPartSyncProperties>(){SceneObjectPartSyncProperties.GroupPosition});
            }
        }

        public virtual void UpdateMovement()
        {
        }

        /// <summary>
        ///
        /// </summary>
        /// <param name="pos"></param>
        public void UpdateOffSet(Vector3 pos)
        {
            if ((pos.X != OffsetPosition.X) ||
                (pos.Y != OffsetPosition.Y) ||
                (pos.Z != OffsetPosition.Z))
            {
                Vector3 newPos = new Vector3(pos.X, pos.Y, pos.Z);

                if (ParentGroup.RootPart.GetStatusSandbox())
                {
                    if (Util.GetDistanceTo(ParentGroup.RootPart.StatusSandboxPos, newPos) > 10)
                    {
                        ParentGroup.RootPart.ScriptSetPhysicsStatus(false);
                        newPos = OffsetPosition;
                        ParentGroup.Scene.SimChat(Utils.StringToBytes("Hit Sandbox Limit"),
                              ChatTypeEnum.DebugChannel, 0x7FFFFFFF, ParentGroup.RootPart.AbsolutePosition, Name, UUID, false);
                    }
                }

                OffsetPosition = newPos;
                //ScheduleTerseUpdate();
                ScheduleFullUpdate(new List<SceneObjectPartSyncProperties>(){SceneObjectPartSyncProperties.OffsetPosition});
            }
        }

        public void UpdatePermissions(UUID AgentID, byte field, uint localID, uint mask, byte addRemTF)
        {
            bool set = addRemTF == 1;
            bool god = m_parentGroup.Scene.Permissions.IsGod(AgentID);

            uint baseMask = _baseMask;
            if (god)
                baseMask = 0x7ffffff0;

            // Are we the owner?
            if ((AgentID == _ownerID) || god)
            {
                switch (field)
                {
                    case 1:
                        if (god)
                        {
                            _baseMask = ApplyMask(_baseMask, set, mask);
                            Inventory.ApplyGodPermissions(_baseMask);
                        }

                        break;
                    case 2:
                        _ownerMask = ApplyMask(_ownerMask, set, mask) &
                                baseMask;
                        break;
                    case 4:
                        _groupMask = ApplyMask(_groupMask, set, mask) &
                                baseMask;
                        break;
                    case 8:
                        _everyoneMask = ApplyMask(_everyoneMask, set, mask) &
                                baseMask;
                        break;
                    case 16:
                        _nextOwnerMask = ApplyMask(_nextOwnerMask, set, mask) &
                                baseMask;
                        // Prevent the client from creating no mod, no copy
                        // objects
                        if ((_nextOwnerMask & (uint)PermissionMask.Copy) == 0)
                            _nextOwnerMask |= (uint)PermissionMask.Transfer;

                        _nextOwnerMask |= (uint)PermissionMask.Move;

                        break;
                }
                SendFullUpdateToAllClients();

                SendObjectPropertiesToClient(AgentID);

            }
        }

        public bool IsHingeJoint()
        {
            // For now, we use the NINJA naming scheme for identifying joints.
            // In the future, we can support other joint specification schemes such as a 
            // custom checkbox in the viewer GUI.
            if (m_parentGroup.Scene.PhysicsScene.SupportsNINJAJoints)
            {
                string hingeString = "hingejoint";
                return (Name.Length >= hingeString.Length && Name.Substring(0, hingeString.Length) == hingeString);
            }
            else
            {
                return false;
            }
        }

        public bool IsBallJoint()
        {
            // For now, we use the NINJA naming scheme for identifying joints.
            // In the future, we can support other joint specification schemes such as a 
            // custom checkbox in the viewer GUI.
            if (m_parentGroup.Scene.PhysicsScene.SupportsNINJAJoints)
            {
                string ballString = "balljoint";
                return (Name.Length >= ballString.Length && Name.Substring(0, ballString.Length) == ballString);
            }
            else
            {
                return false;
            }
        }

        public bool IsJoint()
        {
            // For now, we use the NINJA naming scheme for identifying joints.
            // In the future, we can support other joint specification schemes such as a 
            // custom checkbox in the viewer GUI.
            if (m_parentGroup.Scene.PhysicsScene.SupportsNINJAJoints)
            {
                return IsHingeJoint() || IsBallJoint();
            }
            else
            {
                return false;
            }
        }

        public void UpdatePrimFlags(bool UsePhysics, bool IsTemporary, bool IsPhantom, bool IsVD)
        {
            bool wasUsingPhysics = ((Flags & PrimFlags.Physics) != 0);
            bool wasTemporary = ((Flags & PrimFlags.TemporaryOnRez) != 0);
            bool wasPhantom = ((Flags & PrimFlags.Phantom) != 0);
            bool wasVD = VolumeDetectActive;

            if ((UsePhysics == wasUsingPhysics) && (wasTemporary == IsTemporary) && (wasPhantom == IsPhantom) && (IsVD==wasVD))
            {
                return;
            }

            // Special cases for VD. VD can only be called from a script 
            // and can't be combined with changes to other states. So we can rely
            // that...
            // ... if VD is changed, all others are not.
            // ... if one of the others is changed, VD is not.
            if (IsVD) // VD is active, special logic applies
            {
                // State machine logic for VolumeDetect
                // More logic below
                bool phanReset = (IsPhantom != wasPhantom) && !IsPhantom;

                if (phanReset) // Phantom changes from on to off switch VD off too
                {
                    IsVD = false;               // Switch it of for the course of this routine
                    VolumeDetectActive = false; // and also permanently
                    if (PhysActor != null)
                        PhysActor.SetVolumeDetect(0);   // Let physics know about it too
                }
                else
                {
                    IsPhantom = false;
                    // If volumedetect is active we don't want phantom to be applied.
                    // If this is a new call to VD out of the state "phantom"
                    // this will also cause the prim to be visible to physics
                }

            }

            if (UsePhysics && IsJoint())
            {
                IsPhantom = true;
            }

            if (UsePhysics)
            {
                AddFlag(PrimFlags.Physics);
                if (!wasUsingPhysics)
                {
                    DoPhysicsPropertyUpdate(UsePhysics, false);
                    if (m_parentGroup != null)
                    {
                        if (!m_parentGroup.IsDeleted)
                        {
                            if (LocalId == m_parentGroup.RootPart.LocalId)
                            {
                                m_parentGroup.CheckSculptAndLoad();
                            }
                        }
                    }
                }
            }
            else
            {
                RemFlag(PrimFlags.Physics);
                if (wasUsingPhysics)
                {
                    DoPhysicsPropertyUpdate(UsePhysics, false);
                }
            }


            if (IsPhantom || IsAttachment || (Shape.PathCurve == (byte)Extrusion.Flexible)) // note: this may have been changed above in the case of joints
            {
                AddFlag(PrimFlags.Phantom);
                if (PhysActor != null)
                {
                    m_parentGroup.Scene.PhysicsScene.RemovePrim(PhysActor);
                    /// that's not wholesome.  Had to make Scene public
                    PhysActor = null;
                }
            }
            else // Not phantom
            {
                RemFlag(PrimFlags.Phantom);

                PhysicsActor pa = PhysActor;
                if (pa == null)
                {
                    // It's not phantom anymore. So make sure the physics engine get's knowledge of it
                    PhysActor = m_parentGroup.Scene.PhysicsScene.AddPrimShape(
                        string.Format("{0}/{1}", Name, UUID),
                        Shape,
                        AbsolutePosition,
                        Scale,
                        RotationOffset,
                        UsePhysics);

                    pa = PhysActor;
                    if (pa != null)
                    {
                        pa.LocalID = LocalId;
                        pa.UUID = this.UUID;
                        DoPhysicsPropertyUpdate(UsePhysics, true);
                        if (m_parentGroup != null)
                        {
                            if (!m_parentGroup.IsDeleted)
                            {
                                if (LocalId == m_parentGroup.RootPart.LocalId)
                                {
                                    m_parentGroup.CheckSculptAndLoad();
                                }
                            }
                        }
                        if (
                            ((AggregateScriptEvents & scriptEvents.collision) != 0) ||
                            ((AggregateScriptEvents & scriptEvents.collision_end) != 0) ||
                            ((AggregateScriptEvents & scriptEvents.collision_start) != 0) ||
                            ((AggregateScriptEvents & scriptEvents.land_collision_start) != 0) ||
                            ((AggregateScriptEvents & scriptEvents.land_collision) != 0) ||
                            ((AggregateScriptEvents & scriptEvents.land_collision_end) != 0) ||
                            (CollisionSound != UUID.Zero)
                            )
                        {
                                PhysActor.OnCollisionUpdate += PhysicsCollision;
                                PhysActor.SubscribeEvents(1000);
                        }
                    }
                }
                else // it already has a physical representation
                {
                    pa.IsPhysical = UsePhysics;

                    DoPhysicsPropertyUpdate(UsePhysics, false); // Update physical status. If it's phantom this will remove the prim
                    if (m_parentGroup != null)
                    {
                        if (!m_parentGroup.IsDeleted)
                        {
                            if (LocalId == m_parentGroup.RootPart.LocalId)
                            {
                                m_parentGroup.CheckSculptAndLoad();
                            }
                        }
                    }
                }
            }

            if (IsVD)
            {
                // If the above logic worked (this is urgent candidate to unit tests!)
                // we now have a physicsactor.
                // Defensive programming calls for a check here.
                // Better would be throwing an exception that could be catched by a unit test as the internal 
                // logic should make sure, this Physactor is always here.
                if (this.PhysActor != null)
                {
                    PhysActor.SetVolumeDetect(1);
                    AddFlag(PrimFlags.Phantom); // We set this flag also if VD is active
                    this.VolumeDetectActive = true;
                }
            }
            else
            {   // Remove VolumeDetect in any case. Note, it's safe to call SetVolumeDetect as often as you like
                // (mumbles, well, at least if you have infinte CPU powers :-))
                PhysicsActor pa = this.PhysActor;
                if (pa != null)
                {
                    PhysActor.SetVolumeDetect(0);
                }
                this.VolumeDetectActive = false;
            }


            if (IsTemporary)
            {
                AddFlag(PrimFlags.TemporaryOnRez);
            }
            else
            {
                RemFlag(PrimFlags.TemporaryOnRez);
            }
            //            m_log.Debug("Update:  PHY:" + UsePhysics.ToString() + ", T:" + IsTemporary.ToString() + ", PHA:" + IsPhantom.ToString() + " S:" + CastsShadows.ToString());

            ParentGroup.HasGroupChanged = true;
            //ScheduleFullUpdate();
            ScheduleFullUpdate(new List<SceneObjectPartSyncProperties>() { SceneObjectPartSyncProperties.Flags});
        }

        public void UpdateRotation(Quaternion rot)
        {
            if ((rot.X != RotationOffset.X) ||
                (rot.Y != RotationOffset.Y) ||
                (rot.Z != RotationOffset.Z) ||
                (rot.W != RotationOffset.W))
            {
                RotationOffset = rot;
                ParentGroup.HasGroupChanged = true;
                //ScheduleTerseUpdate();
                ScheduleFullUpdate(new List<SceneObjectPartSyncProperties>() {SceneObjectPartSyncProperties.RotationOffset});
            }
        }

        /// <summary>
        /// Update the shape of this part.
        /// </summary>
        /// <param name="shapeBlock"></param>
        public void UpdateShape(ObjectShapePacket.ObjectDataBlock shapeBlock)
        {
            m_shape.PathBegin = shapeBlock.PathBegin;
            m_shape.PathEnd = shapeBlock.PathEnd;
            m_shape.PathScaleX = shapeBlock.PathScaleX;
            m_shape.PathScaleY = shapeBlock.PathScaleY;
            m_shape.PathShearX = shapeBlock.PathShearX;
            m_shape.PathShearY = shapeBlock.PathShearY;
            m_shape.PathSkew = shapeBlock.PathSkew;
            m_shape.ProfileBegin = shapeBlock.ProfileBegin;
            m_shape.ProfileEnd = shapeBlock.ProfileEnd;
            m_shape.PathCurve = shapeBlock.PathCurve;
            m_shape.ProfileCurve = shapeBlock.ProfileCurve;
            m_shape.ProfileHollow = shapeBlock.ProfileHollow;
            m_shape.PathRadiusOffset = shapeBlock.PathRadiusOffset;
            m_shape.PathRevolutions = shapeBlock.PathRevolutions;
            m_shape.PathTaperX = shapeBlock.PathTaperX;
            m_shape.PathTaperY = shapeBlock.PathTaperY;
            m_shape.PathTwist = shapeBlock.PathTwist;
            m_shape.PathTwistBegin = shapeBlock.PathTwistBegin;
            if (PhysActor != null)
            {
                PhysActor.Shape = m_shape;
                m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
            }

            // This is what makes vehicle trailers work
            // A script in a child prim re-issues
            // llSetPrimitiveParams(PRIM_TYPE) every few seconds. That
            // prevents autoreturn. This is not well known. It also works
            // in SL.
            //
            if (ParentGroup.RootPart != this)
                ParentGroup.RootPart.Rezzed = DateTime.UtcNow;

            ParentGroup.HasGroupChanged = true;
            TriggerScriptChangedEvent(Changed.SHAPE);
            //ScheduleFullUpdate();

            //DSG DEBUG
            //m_log.DebugFormat("{0}, {1}: shaped updated to {2}, calling ScheduleFullUpdate.", Name, UUID, Shape.ProfileShape);

            ScheduleFullUpdate(new List<SceneObjectPartSyncProperties>() {SceneObjectPartSyncProperties.Shape});
        }

        /// <summary>
        /// Update the textures on the part.
        /// </summary>
        /// Added to handle bug in libsecondlife's TextureEntry.ToBytes()
        /// not handling RGBA properly. Cycles through, and "fixes" the color
        /// info
        /// <param name="tex"></param>
        public void UpdateTexture(Primitive.TextureEntry tex)
        {
            //Color4 tmpcolor;
            //for (uint i = 0; i < 32; i++)
            //{
            //    if (tex.FaceTextures[i] != null)
            //    {
            //        tmpcolor = tex.GetFace((uint) i).RGBA;
            //        tmpcolor.A = tmpcolor.A*255;
            //        tmpcolor.R = tmpcolor.R*255;
            //        tmpcolor.G = tmpcolor.G*255;
            //        tmpcolor.B = tmpcolor.B*255;
            //        tex.FaceTextures[i].RGBA = tmpcolor;
            //    }
            //}
            //tmpcolor = tex.DefaultTexture.RGBA;
            //tmpcolor.A = tmpcolor.A*255;
            //tmpcolor.R = tmpcolor.R*255;
            //tmpcolor.G = tmpcolor.G*255;
            //tmpcolor.B = tmpcolor.B*255;
            //tex.DefaultTexture.RGBA = tmpcolor;
            UpdateTextureEntry(tex.GetBytes());
        }

        /// <summary>
        /// Update the texture entry for this part.
        /// </summary>
        /// <param name="textureEntry"></param>
        public void UpdateTextureEntry(byte[] textureEntry)
        {
            m_shape.TextureEntry = textureEntry;
            TriggerScriptChangedEvent(Changed.TEXTURE);

            ParentGroup.HasGroupChanged = true;
            //This is madness..
            //ParentGroup.ScheduleGroupForFullUpdate();
            //This is sparta
            //ScheduleFullUpdate();
            ScheduleFullUpdate(new List<SceneObjectPartSyncProperties>() {SceneObjectPartSyncProperties.Shape});
        }

        public void aggregateScriptEvents()
        {
            AggregateScriptEvents = 0;

            // Aggregate script events
            lock (m_scriptEvents)
            {
                foreach (scriptEvents s in m_scriptEvents.Values)
                {
                    AggregateScriptEvents |= s;
                }
            }

            uint objectflagupdate = 0;

            if (
                ((AggregateScriptEvents & scriptEvents.touch) != 0) ||
                ((AggregateScriptEvents & scriptEvents.touch_end) != 0) ||
                ((AggregateScriptEvents & scriptEvents.touch_start) != 0)
                )
            {
                objectflagupdate |= (uint) PrimFlags.Touch;
            }

            if ((AggregateScriptEvents & scriptEvents.money) != 0)
            {
                objectflagupdate |= (uint) PrimFlags.Money;
            }

            if (AllowedDrop)
            {
                objectflagupdate |= (uint) PrimFlags.AllowInventoryDrop;
            }

            if (
                ((AggregateScriptEvents & scriptEvents.collision) != 0) ||
                ((AggregateScriptEvents & scriptEvents.collision_end) != 0) ||
                ((AggregateScriptEvents & scriptEvents.collision_start) != 0) ||
                ((AggregateScriptEvents & scriptEvents.land_collision_start) != 0) ||
                ((AggregateScriptEvents & scriptEvents.land_collision) != 0) ||
                ((AggregateScriptEvents & scriptEvents.land_collision_end) != 0) ||
                (CollisionSound != UUID.Zero)
                )
            {
                // subscribe to physics updates.
                if (PhysActor != null)
                {
                    PhysActor.OnCollisionUpdate += PhysicsCollision;
                    PhysActor.SubscribeEvents(1000);

                }
            }
            else
            {
                if (PhysActor != null)
                {
                    PhysActor.UnSubscribeEvents();
                    PhysActor.OnCollisionUpdate -= PhysicsCollision;
                }
            }

            if (m_parentGroup == null)
            {
//                m_log.DebugFormat(
//                    "[SCENE OBJECT PART]: Scheduling part {0} {1} for full update in aggregateScriptEvents() since m_parentGroup == null", Name, LocalId);
                //ScheduleFullUpdate();
                ScheduleFullUpdate(new List<SceneObjectPartSyncProperties>() { SceneObjectPartSyncProperties.Flags, SceneObjectPartSyncProperties.AggregateScriptEvents});
                return;
            }

            //if ((GetEffectiveObjectFlags() & (uint)PrimFlags.Scripted) != 0)
            //{
            //    m_parentGroup.Scene.EventManager.OnScriptTimerEvent += handleTimerAccounting;
            //}
            //else
            //{
            //    m_parentGroup.Scene.EventManager.OnScriptTimerEvent -= handleTimerAccounting;
            //}

            LocalFlags=(PrimFlags)objectflagupdate;

            if (m_parentGroup != null && m_parentGroup.RootPart == this)
            {
                m_parentGroup.aggregateScriptEvents();
            }
            else
            {
//                m_log.DebugFormat(
//                    "[SCENE OBJECT PART]: Scheduling part {0} {1} for full update in aggregateScriptEvents()", Name, LocalId);
                //ScheduleFullUpdate();
                ScheduleFullUpdate(new List<SceneObjectPartSyncProperties>() { SceneObjectPartSyncProperties.Flags, SceneObjectPartSyncProperties.LocalFlags,
                    SceneObjectPartSyncProperties.AggregateScriptEvents});
            }
        }

        public int registerTargetWaypoint(Vector3 target, float tolerance)
        {
            if (m_parentGroup != null)
            {
                return m_parentGroup.registerTargetWaypoint(target, tolerance);
            }
            return 0;
        }

        public void unregisterTargetWaypoint(int handle)
        {
            if (m_parentGroup != null)
            {
                m_parentGroup.unregisterTargetWaypoint(handle);
            }
        }

        public int registerRotTargetWaypoint(Quaternion target, float tolerance)
        {
            if (m_parentGroup != null)
            {
                return m_parentGroup.registerRotTargetWaypoint(target, tolerance);
            }
            return 0;
        }

        public void unregisterRotTargetWaypoint(int handle)
        {
            if (m_parentGroup != null)
            {
                m_parentGroup.unregisterRotTargetWaypoint(handle);
            }
        }

        public void SetCameraAtOffset(Vector3 v)
        {
            m_cameraAtOffset = v;
        }

        public void SetCameraEyeOffset(Vector3 v)
        {
            m_cameraEyeOffset = v;
        }

        public void SetForceMouselook(bool force)
        {
            m_forceMouselook = force;
        }

        public Vector3 GetCameraAtOffset()
        {
            return m_cameraAtOffset;
        }

        public Vector3 GetCameraEyeOffset()
        {
            return m_cameraEyeOffset;
        }

        public bool GetForceMouselook()
        {
            return m_forceMouselook;
        }
        
        public override string ToString()
        {
            return String.Format("{0} {1} (parent {2}))", Name, UUID, ParentGroup);
        }

        #endregion Public Methods

        public void SendTerseUpdateToClient(IClientAPI remoteClient)
        {
            if (ParentGroup == null || ParentGroup.IsDeleted)
                return;

            if (IsAttachment && ParentGroup.RootPart != this)
                return;
            
            // Causes this thread to dig into the Client Thread Data.
            // Remember your locking here!
            remoteClient.SendPrimUpdate(this, PrimUpdateFlags.Position | PrimUpdateFlags.Rotation | PrimUpdateFlags.Velocity | PrimUpdateFlags.Acceleration | PrimUpdateFlags.AngularVelocity);
        }
                
        public void AddScriptLPS(int count)
        {
            m_parentGroup.AddScriptLPS(count);
        }
        
        public void ApplyNextOwnerPermissions()
        {
            _baseMask &= _nextOwnerMask;
            _ownerMask &= _nextOwnerMask;
            _everyoneMask &= _nextOwnerMask;

            Inventory.ApplyNextOwnerPermissions();
        }
        public void UpdateLookAt()
        {
            try
            {
                if (APIDTarget != Quaternion.Identity)
                {
                    if (Single.IsNaN(APIDTarget.W) == true)
                    {
                        APIDTarget = Quaternion.Identity;
                        return;
                    }
                    Quaternion rot = RotationOffset;
                    Quaternion dir = (rot - APIDTarget);
                    float speed = ((APIDStrength / APIDDamp) * (float)(Math.PI / 180.0f));
                    if (dir.Z > speed)
                    {
                        rot.Z -= speed;
                    }
                    if (dir.Z < -speed)
                    {
                        rot.Z += speed;
                    }
                    rot.Normalize();
                    UpdateRotation(rot);
                }
            }
            catch (Exception ex)
            {
                m_log.Error("[Physics] " + ex);
            }
        }

        public Color4 GetTextColor()
        {
            Color color = Color;
            return new Color4(color.R, color.G, color.B, (byte)(0xFF - color.A));
        }

        #region REGION SYNC

        public void UpdateObjectPartProperties(SceneObjectPart updatedPart)
        {
            //So far this function is written with Script Engine updating local Scene cache in mind.
            //
            //Assumptions: 
            //(1) prim's UUID and LocalID won't change.
            //(2) CreaterIF, OwnerID, GroupID,  won't change
            //For now, we only update a small set of properties, which is a subset of the serialized object data.
            //We simply assume other properties won't change. (Just a temporary work-around.)
            //Properties that will be updated:
            //GroupPosition, OffsetPosition,RotationOffset, Velocity, AngularVelocity, Acceleration,
            //<Color />   <LinkNum>0</LinkNum>  , Scale
            //
            //And we do not update Physics properties.

            //The above assumptions and limited updating actions can be easily fixed once Scene supports
            //[property name, property value] type of detailed updates.

            //Need to be able to update TaskInventory, so that new scripts will be added
            
            if (updatedPart == null)
                return;

            this.GroupPosition = updatedPart.GroupPosition;
            this.OffsetPosition = updatedPart.OffsetPosition;
            this.RotationOffset = updatedPart.RotationOffset;
            this.AngularVelocity = updatedPart.AngularVelocity;
            this.Acceleration = updatedPart.Acceleration;
            this.Color = updatedPart.Color;
            this.LinkNum = updatedPart.LinkNum;
            this.Velocity = updatedPart.Velocity;
            this.Scale = updatedPart.Scale;
            this.SitAnimation = updatedPart.SitAnimation;
            this.SitName = updatedPart.SitName;
            this.SitTargetAvatar = updatedPart.SitTargetAvatar;
            this.SitTargetOrientation = updatedPart.SitTargetOrientation;
            this.SitTargetOrientationLL = updatedPart.SitTargetOrientationLL;
            this.SitTargetPosition = updatedPart.SitTargetPosition;
            this.SitTargetPositionLL = updatedPart.SitTargetPositionLL;
            
            this.ObjectFlags = updatedPart.ObjectFlags;

            this.m_inventory.Items = (TaskInventoryDictionary)updatedPart.m_inventory.Items.Clone();

            //update shape information, for now, only update fileds in Shape whose set functions are defined in PrimitiveBaseShape
            this.Shape = updatedPart.Shape.Copy();
            this.Shape.TextureEntry = updatedPart.Shape.TextureEntry;

        }

        #endregion

        #region DSG SYNC

        //Time stamp for the most recent update on this prim. We only have one time-stamp per prim for now.
        //The goal is to evetually have time-stamp per property bucket for each prim.
        private long m_lastUpdateTimeStamp = DateTime.Now.Ticks;
        public long LastUpdateTimeStamp
        {
            get { return m_lastUpdateTimeStamp; }
            set { m_lastUpdateTimeStamp = value; }
        }

        #endregion 

    }

    //DSG SYNC

    //Information for concurrency control of one bucket of prim proproperties.
    public class BucketSyncInfo
    {
        private long m_lastUpdateTimeStamp;
        private string m_lastUpdateActorID;
        //lock for concurrent updates of the timestamp and actorID.
        private Object m_updateLock = new Object();
        private string m_bucketName;
        private bool m_bucketLocallyTainted = false; //indicating if the bucket has been tainted by local write operations
        private bool m_bucketTaintedBySync = false; //indicating if the bucket has been tainted by remote write operations (propogated by synchronization)

        public long LastUpdateTimeStamp
        {
            get { return m_lastUpdateTimeStamp; }
            set { m_lastUpdateTimeStamp = value; }
        }

        public string LastUpdateActorID
        {
            get { return m_lastUpdateActorID; }
            set { m_lastUpdateActorID = value; }
        }

        public string BucketName
        {
            get { return m_bucketName; }
        }

        public bool LocallyTainted
        {
            get { return m_bucketLocallyTainted; }
        }

        public bool TaintedBySync
        {
            get { return m_bucketTaintedBySync; }
        }

        public BucketSyncInfo(string bucketName)
        {
            m_bucketName = bucketName;
        }

        public BucketSyncInfo(long timeStamp, string actorID, string bucketName)
        {
            m_lastUpdateTimeStamp = timeStamp;
            m_lastUpdateActorID = actorID;
            m_bucketName = bucketName;
        }

        public void UpdateSyncInfoAndClearTaint(long timeStamp, string actorID)
        {
            lock (m_updateLock)
            {
                m_lastUpdateTimeStamp = timeStamp;
                m_lastUpdateActorID = actorID;
                m_bucketLocallyTainted = false; //clear taint
            }
        }

        public void TaintBucketLocally()
        {
            lock (m_updateLock)
            {
                m_bucketLocallyTainted = true;
            }
        }

        public void TaintBucketBySync()
        {
            m_bucketTaintedBySync = true;
        }

        public void ClearBucketTaintBySync()
        {
            m_bucketTaintedBySync = false;
        }
    }

    /*
    public enum SceneObjectPartProperties:ulong 
        {
        //Following properties copied from SceneObjectSerializer(), 
            AllowedDrop = (ulong) 1<<0,
            CreatorID = (ulong) 1<<1,
            CreatorData = (ulong) 1 <<2,
            FolderID = (ulong) 1 << 3,
            InventorySerial = (ulong) 1 << 4,
            TaskInventory = (ulong) 1 << 5,
            //UUID", 
            //LocalId", 
            Name = (ulong) 1 << 6,
            Material = (ulong) 1 <<7,
            PassTouches = (ulong) 1 << 8,
            RegionHandle = (ulong) 1 << 9,
            ScriptAccessPin = (ulong) 1 << 10,
            GroupPosition = (ulong) 1 << 11,
            OffsetPosition = (ulong) 1 << 12,
            RotationOffset = (ulong) 1 << 13,
            Velocity = (ulong) 1 << 14,
            AngularVelocity = (ulong) 1 << 15,
            //"Acceleration", 
            SOP_Acceleration = (ulong) 1 << 16,  //SOP and PA read/write their own local copies of acceleration, so we distinguish the copies
            Description = (ulong) 1 << 17,
            Color = (ulong) 1 << 18,
            Text = (ulong) 1 << 19,
            SitName = (ulong) 1 << 20,
            TouchName = (ulong) 1 << 21,
            LinkNum = (ulong) 1 << 22,
            ClickAction = (ulong) 1 << 23,
            Shape = (ulong) 1 << 24,
            Scale = (ulong) 1 << 25,
            UpdateFlag = (ulong) 1 << 26,
            SitTargetOrientation = (ulong) 1 << 27,
            SitTargetPosition = (ulong) 1 << 28,
            SitTargetPositionLL = (ulong) 1 << 29,
            SitTargetOrientationLL = (ulong) 1 << 30,
            ParentID = (ulong)1 << 31,
            CreationDate = (ulong) 1 << 32,
            Category = (ulong) 1 << 33,
            SalePrice = (ulong) 1 << 34,
            ObjectSaleType = (ulong) 1 << 35,
            OwnershipCost = (ulong) 1 << 36,
            GroupID = (ulong) 1 << 37,
            OwnerID = (ulong) 1 << 38,
            LastOwnerID = (ulong) 1 << 39,
            BaseMask = (ulong) 1 << 40,
            OwnerMask = (ulong) 1 << 41,
            GroupMask = (ulong) 1 << 42,
            EveryoneMask = (ulong) 1 << 43,
            NextOwnerMask = (ulong) 1 << 44,
            Flags = (ulong) 1 << 45,
            CollisionSound = (ulong) 1 << 46,
            CollisionSoundVolume = (ulong) 1 << 47,
            MediaUrl = (ulong) 1 << 48,
            TextureAnimation = (ulong) 1 << 49,
            ParticleSystem = (ulong) 1 << 50,
            //Property names below copied from PhysicsActor, they are necessary in synchronization, but not covered the above properties
            //Physics properties "Velocity" is covered above
            Position = (ulong) 1 << 51,
            Size = (ulong) 1 << 52,
            Force = (ulong) 1 << 53,
            RotationalVelocity = (ulong) 1 << 54,
            PA_Acceleration = (ulong) 1 << 55,
            Torque = (ulong) 1 << 56,
            Orientation = (ulong) 1 << 57,
            IsPhysical = (ulong) 1 << 58,
            Flying = (ulong) 1 << 59,
            Buoyancy = (ulong) 1 << 60,
            //To be handled
            AttachmentPoint = (ulong)1 << 61,
            FullUpdate = UInt64.MaxValue
    }
    */

    public enum SceneObjectPartSyncProperties 
    {
        None,
        //Following properties copied from SceneObjectSerializer(), 
        AllowedDrop ,
        CreatorID ,
        CreatorData ,
        FolderID ,
        InventorySerial,
        TaskInventory,
        //UUID",  //UUID not supposed to be changed after SOP is created, not included in SyncProperties
        //LocalId", 
        Name,
        Material,
        PassTouches,
        //RegionHandle,
        ScriptAccessPin,
        GroupPosition,
        OffsetPosition,
        RotationOffset,
        Velocity,
        AngularVelocity,
        //"Acceleration", 
        SOP_Acceleration,  //SOP and PA read/write their own local copies of acceleration, so we distinguish the copies
        Description,
        Color,
        Text,
        SitName,
        TouchName,
        LinkNum,
        ClickAction,
        Shape,
        Scale,
        UpdateFlag,
        SitTargetOrientation,
        SitTargetPosition,
        SitTargetPositionLL,
        SitTargetOrientationLL,
        //ParentID,
        CreationDate,
        Category,
        SalePrice,
        ObjectSaleType,
        OwnershipCost,
        GroupID,
        OwnerID,
        LastOwnerID,
        BaseMask,
        OwnerMask,
        GroupMask,
        EveryoneMask,
        NextOwnerMask,
        Flags,
        CollisionSound,
        CollisionSoundVolume,
        MediaUrl,
        TextureAnimation,
        ParticleSystem,
        //Property names below copied from PhysicsActor, they are necessary in 
        //synchronization, but not covered by xml serialization
        //Physics properties "Velocity" is covered above
        Position,
        Size,
        Force,
        RotationalVelocity,
        PA_Acceleration,
        Torque,
        Orientation,
        IsPhysical,
        Flying,
        Buoyancy,
        Kinematic,
        CollidingGround,
        IsColliding,

        //Properties need to be synced, but not in xml serializations
        AggregateScriptEvents,
        AttachedAvatar,
        AttachedPos,
        AttachmentPoint,
        IsAttachment,
        LocalFlags,
        //TODO!!!! To be handled in serialization/deserizaltion for synchronization
        Sound, //This indicates any Sound related property has changed: Sound, SoundGain, SoundFlags,SoundRadius,
        //Addition properties to be added here

        //Group properties
        IsSelected,
        //Client Manager may want to add some property here that viewers care about and should be synchronized across actors

        FullUpdate,
    }


    public class SceneObjectPart : SceneObjectPartBase
    {
        public SceneObjectPart()
            : base()
        {
        }

        public SceneObjectPart(
    UUID ownerID, PrimitiveBaseShape shape, Vector3 groupPosition,
    Quaternion rotationOffset, Vector3 offsetPosition)
            : base(ownerID, shape, groupPosition, rotationOffset, offsetPosition)
        {
        }

        //The following variables should be initialized when this SceneObjectPart is added into the local Scene.
        //private List<BucketSyncInfo> SynchronizeUpdatesToScene = null;
        //public List<BucketSyncInfo> BucketSyncInfoList
        private Dictionary<string, BucketSyncInfo> m_bucketSyncInfoList = new Dictionary<string, BucketSyncInfo>();
        public Dictionary<string, BucketSyncInfo> BucketSyncInfoList
        {
            get { return m_bucketSyncInfoList; }
            set { m_bucketSyncInfoList = value; }
        }
        //TODO: serialization and deserialization processors to be added in SceneObjectSerializer

        //The following variables are initialized when RegionSyncModule reads the config file for mapping of properties and buckets
        private static Dictionary<SceneObjectPartSyncProperties, string> m_primPropertyBucketMap = null;
        private static List<string> m_propertyBucketNames = null;

        private static string m_localActorID = "";
        //private static int m_bucketCount = 0;
        //private delegate void BucketUpdateProcessor(int bucketIndex);
        private delegate void BucketUpdateProcessor(Object updatedPart, string bucketName);

        //private static Dictionary<string, BucketUpdateProcessor> m_bucketUpdateProcessors = new Dictionary<string, BucketUpdateProcessor>();
        private Dictionary<string, BucketUpdateProcessor> m_bucketUpdateProcessors = new Dictionary<string, BucketUpdateProcessor>();
        private Dictionary<string, Object> m_bucketUpdateLocks = new Dictionary<string, object>();
        //private Dictionary<string, bool> m_bucketSyncTainted = new Dictionary<string, bool>();

        //Define this as a guard to not to fill in any sync info when not desired, i.e. while de-serializing and building SOP and SOG, where 
        //property set functions will be called and might trigger UpdateBucketSyncInfo() if not guarded carefully.
        private bool m_syncEnabled = false;

        //The list of each prim's properties. This is the list of properties that matter in synchronizing prim copies on different actors.
        //This list is created based on properties included in the serialization/deserialization process (see SceneObjectSerializer()) and the 
        //properties Physics Engine needs to synchronize to other actors.
        /*
        public static List<string> PropertyList = new List<string>()
        {
            //Following properties copied from SceneObjectSerializer()
            "AllowedDrop", 
            "CreatorID", 
            "CreatorData", 
            "FolderID", 
            "InventorySerial", 
            "TaskInventory", 
            "UUID", 
            "LocalId", 
            "Name", 
            "Material", 
            "PassTouches", 
            "RegionHandle", 
            "ScriptAccessPin", 
            "GroupPosition", 
            "OffsetPosition", 
            "RotationOffset", 
            "Velocity", 
            "AngularVelocity", 
            //"Acceleration", 
            "SOP_Acceleration",  //SOP and PA read/write their own local copies of acceleration, so we distinguish the copies
            "Description", 
            "Color", 
            "Text", 
            "SitName", 
            "TouchName", 
            "LinkNum", 
            "ClickAction", 
            "Shape", 
            "Scale", 
            "UpdateFlag", 
            "SitTargetOrientation", 
            "SitTargetPosition", 
            "SitTargetPositionLL", 
            "SitTargetOrientationLL", 
            "ParentID", 
            "CreationDate", 
            "Category", 
            "SalePrice", 
            "ObjectSaleType", 
            "OwnershipCost", 
            "GroupID", 
            "OwnerID", 
            "LastOwnerID", 
            "BaseMask", 
            "OwnerMask", 
            "GroupMask", 
            "EveryoneMask", 
            "NextOwnerMask", 
            "Flags", 
            "CollisionSound", 
            "CollisionSoundVolume", 
            "MediaUrl", 
            "TextureAnimation", 
            "ParticleSystem", 
            //Property names below copied from PhysicsActor, they are necessary in synchronization, but not covered the above properties
            //Physics properties "Velocity" is covered above
            "Position",
            "Size", 
            "Force",
            "RotationalVelocity",
            "PA_Acceleration",
            "Torque",
            "Orientation",
            "IsPhysical",
            "Flying",
            "Buoyancy",
        };
         * */

        /// <summary>
        /// Return the list of all prim (SOP) properties, in enum type. 
        /// Excluding None, FullUpdate.
        /// </summary>
        /// <returns></returns>
        public static HashSet<SceneObjectPartSyncProperties> GetAllPrimProperties()
        {
            HashSet<SceneObjectPartSyncProperties> allProperties = new HashSet<SceneObjectPartSyncProperties>();
            foreach (SceneObjectPartSyncProperties property in Enum.GetValues(typeof(SceneObjectPartSyncProperties)))
            {
                switch (property)
                {
                    case SceneObjectPartSyncProperties.None:
                    case SceneObjectPartSyncProperties.FullUpdate:
                        break;
                    default:
                        allProperties.Add(property);
                        break;
                }
            }
            return allProperties;
        }

        public static HashSet<SceneObjectPartSyncProperties> GetAllPrimNonPhysActorProperties()
        {
            HashSet<SceneObjectPartSyncProperties> allProperties = new HashSet<SceneObjectPartSyncProperties>();
            foreach (SceneObjectPartSyncProperties property in Enum.GetValues(typeof(SceneObjectPartSyncProperties)))
            {
                switch (property)
                {
                    //Enum value that is not real properties
                    case SceneObjectPartSyncProperties.None:
                    case SceneObjectPartSyncProperties.FullUpdate:
                    //PhysActor properties
                    case SceneObjectPartSyncProperties.Buoyancy:
                    case SceneObjectPartSyncProperties.Flying:
                    case SceneObjectPartSyncProperties.Force:
                    case SceneObjectPartSyncProperties.IsColliding:
                    case SceneObjectPartSyncProperties.CollidingGround:
                    case SceneObjectPartSyncProperties.IsPhysical:
                    case SceneObjectPartSyncProperties.Kinematic:
                    case SceneObjectPartSyncProperties.Orientation:
                    case SceneObjectPartSyncProperties.PA_Acceleration:
                    case SceneObjectPartSyncProperties.Position:
                    case SceneObjectPartSyncProperties.RotationalVelocity:
                    case SceneObjectPartSyncProperties.Size:
                    case SceneObjectPartSyncProperties.Torque:
                        break;
                    default:
                        allProperties.Add(property);
                        break;
                }
            }
            return allProperties;
        }

        public static HashSet<SceneObjectPartSyncProperties> GetAllPhysActorProperties()
        {
            HashSet<SceneObjectPartSyncProperties> allProperties = new HashSet<SceneObjectPartSyncProperties>();
            foreach (SceneObjectPartSyncProperties property in Enum.GetValues(typeof(SceneObjectPartSyncProperties)))
            {
                switch (property)
                {
                    //PhysActor properties
                    case SceneObjectPartSyncProperties.Buoyancy:
                    case SceneObjectPartSyncProperties.Flying:
                    case SceneObjectPartSyncProperties.Force:
                    case SceneObjectPartSyncProperties.IsColliding:
                    case SceneObjectPartSyncProperties.CollidingGround:
                    case SceneObjectPartSyncProperties.IsPhysical:
                    case SceneObjectPartSyncProperties.Kinematic:
                    case SceneObjectPartSyncProperties.Orientation:
                    case SceneObjectPartSyncProperties.PA_Acceleration:
                    case SceneObjectPartSyncProperties.Position:
                    case SceneObjectPartSyncProperties.RotationalVelocity:
                    case SceneObjectPartSyncProperties.Size:
                    case SceneObjectPartSyncProperties.Torque:
                        allProperties.Add(property);
                        break;
                    default:
                        break;
                }
            }
            return allProperties;
        }

        public static HashSet<SceneObjectPartSyncProperties> GetAllNonPhysActorProperties()
        {
            HashSet<SceneObjectPartSyncProperties> allProperties = GetAllPrimProperties();
            HashSet<SceneObjectPartSyncProperties> physActorProperties = GetAllPhysActorProperties();

            foreach (SceneObjectPartSyncProperties pProperty in physActorProperties)
            {
                allProperties.Remove(pProperty);
            }
            return allProperties;
        }

        public static HashSet<SceneObjectPartSyncProperties> GetGroupProperties()
        {
            HashSet<SceneObjectPartSyncProperties> allProperties = new HashSet<SceneObjectPartSyncProperties>(){SceneObjectPartSyncProperties.IsSelected};
            return allProperties;
        }

        public static void InitializePropertyBucketInfo(Dictionary<SceneObjectPartSyncProperties, string> propertyBucketMap, List<string> bucketNames, string actorID)
        {
            m_primPropertyBucketMap = propertyBucketMap;
            m_propertyBucketNames = bucketNames;
            m_localActorID = actorID;
            //m_bucketCount = bucketNames.Count;

            //RegisterBucketUpdateProcessor();
        }

        public string DebugObjectPartProperties()
        {
            string debugMsg = "UUID " + UUID + ", Name " + Name + ", localID " + LocalId;
            //debugMsg += ", parentID " + ParentID + ", parentUUID " + ParentUUID;
            //foreach (KeyValuePair<string, BucketSyncInfo> pair in m_bucketSyncInfoList)
            //{
            //    debugMsg += ", Bucket " + pair.Key + ": TimeStamp - " + pair.Value.LastUpdateTimeStamp + ", ActorID - " + pair.Value.LastUpdateActorID;
            //}
            debugMsg += ", AggregateScriptEvents = " + AggregateScriptEvents.ToString()+", OffsetPosition: "+OffsetPosition;
            String hashedShape = Util.Md5Hash(SerializeShape());
            debugMsg += ", hashed Shape = " + hashedShape;
            return debugMsg;
        }

        /// <summary>
        /// Link each bucket with the function that applies updates to properties in the bucket upon receiving sync messages. 
        /// This is the "hard-coded" part in the property-buckets implementation. When new buckets are implemented, 
        /// the processing functions need to be modified accordingly.
        /// </summary>
        //private static void RegisterBucketUpdateProcessor()
        private void RegisterBucketUpdateProcessor()
        {
            foreach (string bucketName in m_propertyBucketNames)
            {
                switch (bucketName)
                {
                    case "General":
                        m_bucketUpdateProcessors.Add(bucketName, GeneralBucketUpdateProcessor);
                        break;
                    case "Physics":
                        m_bucketUpdateProcessors.Add(bucketName, PhysicsBucketUpdateProcessor);
                        break;
                    default:
                        m_log.Warn("Bucket " + bucketName + "'s update processing function not defined yet");
                        break;
                }
            }
        }

        private void GeneralBucketUpdateProcessor(Object updatedPartO, string bucketName)
        {
            if (!(updatedPartO is SceneObjectPart)) return;
            SceneObjectPart updatedPart = (SceneObjectPart)updatedPartO;

            //If needed, we could define new set functions for these properties, and cast this SOP to SOPBase to 
            //invoke the set functions in SOPBase 
            //SceneObjectPartBase localPart = (SceneObjectPartBase)this; 
            SceneObjectPart localPart = this; 
            bool collisionSoundUpdated = false; 

            lock (m_bucketUpdateLocks[bucketName])
            {
                //See SceneObjectSerializer for the properties that are included in a serialized SceneObjectPart.
                localPart.AllowedDrop = updatedPart.AllowedDrop;
                localPart.CreatorID = updatedPart.CreatorID;
                localPart.CreatorData = updatedPart.CreatorData;
                localPart.FolderID = updatedPart.FolderID;
                localPart.InventorySerial = updatedPart.InventorySerial;
                localPart.TaskInventory = updatedPart.TaskInventory;
                //Following two properties, UUID and LocalId, shall not be updated.
                //localPart.UUID 
                //localPart.LocalId
                localPart.Name = updatedPart.Name;
                localPart.Material = updatedPart.Material;
                localPart.PassTouches = updatedPart.PassTouches;
                //RegionHandle shall not be copied, since updatedSog is sent by a different actor, which has a different local region
                //localPart.RegionHandle 
                localPart.ScriptAccessPin = updatedPart.ScriptAccessPin;
                
                localPart.Description = updatedPart.Description;
                localPart.Color = updatedPart.Color;
                localPart.Text = updatedPart.Text;
                localPart.SitName = updatedPart.SitName;
                localPart.TouchName = updatedPart.TouchName;
                localPart.LinkNum = updatedPart.LinkNum;
                localPart.ClickAction = updatedPart.ClickAction;
                localPart.Shape = updatedPart.Shape;
                localPart.Scale = updatedPart.Scale;
                localPart.UpdateFlag = updatedPart.UpdateFlag;
                localPart.SitTargetOrientation = updatedPart.SitTargetOrientation;
                localPart.SitTargetPosition = updatedPart.SitTargetPosition;
                localPart.SitTargetPositionLL = updatedPart.SitTargetPositionLL;
                localPart.SitTargetOrientationLL = updatedPart.SitTargetOrientationLL;
                //ParentID should still point to the rootpart in the local sog, do not update. If the root part changed, we will update it in SceneObjectGroup.UpdateObjectProperties()
                //localPart.ParentID;
                localPart.CreationDate = updatedPart.CreationDate;
                localPart.Category = updatedPart.Category;
                localPart.SalePrice = updatedPart.SalePrice;
                localPart.ObjectSaleType = updatedPart.ObjectSaleType;
                localPart.OwnershipCost = updatedPart.OwnershipCost;
                localPart.GroupID = updatedPart.GroupID;
                localPart.OwnerID = updatedPart.OwnerID;
                localPart.LastOwnerID = updatedPart.LastOwnerID;
                localPart.BaseMask = updatedPart.BaseMask;
                localPart.OwnerMask = updatedPart.OwnerMask;
                localPart.GroupMask = updatedPart.GroupMask;
                localPart.EveryoneMask = updatedPart.EveryoneMask;
                localPart.NextOwnerMask = updatedPart.NextOwnerMask;
                localPart.Flags = updatedPart.Flags;
                localPart.LocalFlags = updatedPart.LocalFlags;

                //We will update CollisionSound with special care so that it does not lead to ScheduleFullUpdate of this part, to make the actor think it just made an update and 
                //need to propogate that update to other actors.
                //localPart.CollisionSound = updatedPart.CollisionSound;
                collisionSoundUpdated = UpdateCollisionSound(updatedPart.CollisionSound);

                localPart.CollisionSoundVolume = updatedPart.CollisionSoundVolume;
                localPart.MediaUrl = updatedPart.MediaUrl;
                localPart.TextureAnimation = updatedPart.TextureAnimation;
                localPart.ParticleSystem = updatedPart.ParticleSystem;

                bool preIsAttachment = localPart.IsAttachment;

                if (!localPart.AttachedAvatar.Equals(updatedPart.AttachedAvatar))
                {
                    localPart.AttachedAvatar = updatedPart.AttachedAvatar;
                    ScenePresence avatar = m_parentGroup.Scene.GetScenePresence(AttachedAvatar);
                    localPart.ParentGroup.RootPart.SetParentLocalId(avatar.LocalId);
                }
                localPart.AttachedPos = updatedPart.AttachedPos;
                localPart.SetAttachmentPoint(updatedPart.AttachmentPoint); 
                //localPart.AttachmentPoint = updatedPart.AttachmentPoint;
                //NOTE!!!! IsAttachment can only be set after AttachedAvatar is set, see GroupPosition get function.
                //if (!localPart.AttachedAvatar.Equals(UUID.Zero) && updatedPart.IsAttachment)
                //{
                //    localPart.IsAttachment = updatedPart.IsAttachment;
                //}

                localPart.AggregateScriptEvents = updatedPart.AggregateScriptEvents;
                aggregateScriptEventSubscriptions();

                m_bucketSyncInfoList[bucketName].LastUpdateTimeStamp = updatedPart.BucketSyncInfoList[bucketName].LastUpdateTimeStamp;
                m_bucketSyncInfoList[bucketName].LastUpdateActorID = updatedPart.BucketSyncInfoList[bucketName].LastUpdateActorID;

                if (collisionSoundUpdated)
                {
                    //If the local actor is Script Engine, it will catch this evnet and trigger aggregateScriptEvents()
                    m_parentGroup.Scene.EventManager.TriggerAggregateScriptEvents(this);
                }
            }

            //Schedule updates to be sent out, if the local copy has just been updated
            //(1) if we are debugging the actor with a viewer attaching to it,
            //we need to schedule updates to be sent to the viewer.
            //(2) or if we are a relaying node to relay updates, we need to forward the updates.
            //NOTE: Passing null argument to make sure that LastUpdateTimeStamp and LastUpdateActorID of each bucket 
            //      are kept the same as in the received copy of the object.
            ScheduleFullUpdate(null);

            //Mark the bucket as having been tainted by sync operations
            m_bucketSyncInfoList[bucketName].TaintBucketBySync();
        }

        // Do any subscriptions based on the AggregateScriptEvents
        protected void aggregateScriptEventSubscriptions()
        {
            if (
                ((AggregateScriptEvents & scriptEvents.collision) != 0) ||
                ((AggregateScriptEvents & scriptEvents.collision_end) != 0) ||
                ((AggregateScriptEvents & scriptEvents.collision_start) != 0) ||
                ((AggregateScriptEvents & scriptEvents.land_collision_start) != 0) ||
                ((AggregateScriptEvents & scriptEvents.land_collision) != 0) ||
                ((AggregateScriptEvents & scriptEvents.land_collision_end) != 0) ||
                (CollisionSound != UUID.Zero)
                )
            {
                // subscribe to physics updates.
                if (PhysActor != null)
                {
                    PhysActor.OnCollisionUpdate += PhysicsCollision;
                    PhysActor.SubscribeEvents(1000);

                }
            }
            else
            {
                if (PhysActor != null)
                {
                    PhysActor.UnSubscribeEvents();
                    PhysActor.OnCollisionUpdate -= PhysicsCollision;
                }
            }
        }

        //NOTE: 
        //1. Only touch the properties and BucketSyncInfo that is related to 
        //the given bucketName. Other properties and buckets may not be filled 
        //at all in "updatedPart".
        //2. For GroupPosition and Position properties, if coordinates conversion
        //   is needed, the caller should have done that already.
        private void PhysicsBucketUpdateProcessor(Object updatedPartO, string bucketName)
        {
            SceneObjectPart localPart = this;

            if (updatedPartO is SceneObjectPart)
            {
                SceneObjectPart updatedPart = (SceneObjectPart)updatedPartO;

                localPart.GroupPosition = updatedPart.GroupPosition;
                localPart.OffsetPosition = updatedPart.OffsetPosition;
                localPart.Scale = updatedPart.Scale;
                localPart.Velocity = updatedPart.Velocity;
                localPart.AngularVelocity = updatedPart.AngularVelocity;
                localPart.RotationOffset = updatedPart.RotationOffset;

                //TEMP DEBUG
               // m_log.DebugFormat("SceneObjectPart.PhysicsBucketUpdateProcessor called for part {0},{1}, at GroupPos {2}", localPart.Name, localPart.UUID, localPart.GroupPosition);

                return;
            }

            if (!(updatedPartO is OSDMap)) return;
            OSDMap data = (OSDMap)updatedPartO;

            //If needed, we could define new set functions for these properties, and cast this SOP to SOPBase to 
            //invoke the set functions in SOPBase 
            //SceneObjectPartBase localPart = (SceneObjectPartBase)this; 
            //SceneObjectPart localPart = this;
            PhysicsActor pa = localPart.PhysActor;

            //m_log.Debug("Received Physics Bucket updates for " + localPart.Name + ". GroupPosition: " + data["GroupPosition"].AsVector3().ToString()
            //    + ", Position = " + data["Position"].AsVector3().ToString());

            lock (m_bucketUpdateLocks[bucketName])
            {
                if (data.ContainsKey("GroupPosition"))
                    localPart.GroupPosition = data["GroupPosition"].AsVector3();
                if (data.ContainsKey("OffsetPosition"))
                    localPart.OffsetPosition = data["OffsetPosition"].AsVector3();
                if (data.ContainsKey("Scale"))
                    localPart.Scale = data["Scale"].AsVector3();
                if (data.ContainsKey("Velocity"))
                    localPart.Velocity = data["Velocity"].AsVector3();
                if (data.ContainsKey("AngularVelocity"))
                    localPart.AngularVelocity = data["AngularVelocity"].AsVector3();
                if (data.ContainsKey("RotationOffset"))
                    localPart.RotationOffset = data["RotationOffset"].AsQuaternion();

                //m_log.Debug("Received Physics Bucket updates for " + localPart.Name + ","+localPart.UUID
                //    + ". GroupPosition: " + data["GroupPosition"].AsVector3().ToString()); 

                if (pa != null)
                {
                    if (data.ContainsKey("Size"))
                        pa.Size = data["Size"].AsVector3();
                    if (data.ContainsKey("Position"))
                        pa.Position = data["Position"].AsVector3();
                    if (data.ContainsKey("Force"))
                        pa.Force = data["Force"].AsVector3();
                    // pa.Velocity = data["Velocity"].AsVector3();
                    if (data.ContainsKey("RotationalVelocity"))
                        pa.RotationalVelocity = data["RotationalVelocity"].AsVector3();
                    if (data.ContainsKey("PA_Acceleration"))
                        pa.Acceleration = data["PA_Acceleration"].AsVector3();
                    if (data.ContainsKey("Torque"))
                        pa.Torque = data["Torque"].AsVector3();
                    if (data.ContainsKey("Orientation"))
                        pa.Orientation = data["Orientation"].AsQuaternion();
                    if (data.ContainsKey("IsPhysical"))
                        pa.IsPhysical = data["IsPhysical"].AsBoolean();
                    if (data.ContainsKey("Flying"))
                        pa.Flying = data["Flying"].AsBoolean();
                    if (data.ContainsKey("Kinematic"))
                        pa.Kinematic = data["Kinematic"].AsBoolean();
                    if (data.ContainsKey("Buoyancy"))
                        pa.Buoyancy = (float)data["Buoyancy"].AsReal();
                    if (data.ContainsKey("CollidingGround"))
                        pa.CollidingGround = data["CollidingGround"].AsBoolean();
                    if (data.ContainsKey("IsColliding"))
                        pa.IsColliding = data["IsColliding"].AsBoolean();

                    // m_log.DebugFormat("{0}: PhysicsBucketUpdateProcessor for {2},{3}. pos={1}", , data["Position"].AsVector3().ToString(), localPart.Name, localPart.UUID);
                }

                if (data.ContainsKey("LastUpdateTimeStamp"))
                    m_bucketSyncInfoList[bucketName].LastUpdateTimeStamp = data["LastUpdateTimeStamp"].AsLong();
                if (data.ContainsKey("LastUpdateActorID"))
                    m_bucketSyncInfoList[bucketName].LastUpdateActorID = data["LastUpdateActorID"].AsString();

            }

            //TEMP DEBUG
            //m_log.DebugFormat("SceneObjectPart.PhysicsBucketUpdateProcessor called for part {0},{1}, at GroupPos {2}", localPart.Name, localPart.UUID, localPart.GroupPosition);

            //Schedule updates to be sent out, if the local copy has just been updated
            //(1) if we are debugging the actor with a viewer attaching to it,
            //we need to schedule updates to be sent to the viewer.
            //(2) or if we are a relaying node to relay updates, we need to forward the updates.
            //NOTE: Passing SceneObjectPartProperties.None to make sure that LastUpdateTimeStamp and LastUpdateActorID of each bucket 
            //      are kept the same as in the received copy of the object.

            ScheduleFullUpdate(null);

            //Mark the bucket as having been tainted by sync operations
            m_bucketSyncInfoList[bucketName].TaintBucketBySync();
        }

        //Initialize and set the values of timestamp and actorID for each synchronization bucket.
        //Should be called when the SceneObjectGroup this part is in is added to scene, see SceneObjectGroup.AttachToScene.
        private bool m_BucketUpdateProcessorRegistered = false;
        public void InitializeBucketSyncInfo()
        {
            if (m_primPropertyBucketMap == null)
            {
                m_log.Error("Bucket Information has not been initilized. Return.");
                return;
            }
            long timeStamp = DateTime.Now.Ticks;

            // m_log.Debug("InitializeBucketSyncInfo called at " + timeStamp);

            for (int i = 0; i < m_propertyBucketNames.Count; i++)
            {
                string bucketName = m_propertyBucketNames[i];

                //If the object is created by de-serialization, then it may already have m_bucketSyncInfoList populated with the right number of buckets.
                //If the deserilaization is due to receiving a sync message, then m_bucketSyncInfoList should already be filled with sync info.
                if (!m_bucketSyncInfoList.ContainsKey(bucketName))
                {
                    BucketSyncInfo syncInfo = new BucketSyncInfo(timeStamp, m_localActorID, bucketName);
                    m_bucketSyncInfoList.Add(bucketName, syncInfo);
                }
                if (!m_bucketUpdateLocks.ContainsKey(bucketName))
                {
                    m_bucketUpdateLocks.Add(bucketName, new Object());
                }
            }

            if (!m_BucketUpdateProcessorRegistered)
            {
                RegisterBucketUpdateProcessor();
                m_BucketUpdateProcessorRegistered = true;
            }

            m_syncEnabled = true;
        }

        //For tainitng and clearing taints, do i need to lock on m_bucketSyncTaint?
        public void TaintBucketSyncInfo(SceneObjectPartSyncProperties property)
        {
            if (m_syncEnabled)
            {
                if (property == SceneObjectPartSyncProperties.None)
                    return;

                if (property == SceneObjectPartSyncProperties.FullUpdate)
                {
                    foreach (BucketSyncInfo bucketSynInfo in m_bucketSyncInfoList.Values)
                    {
                        bucketSynInfo.TaintBucketLocally();
                    }
                    // m_log.DebugFormat("{0}: TaintBucketSyncInfo: FullUpdate", "[SCENE OBJECT PART]");
                }
                else
                {
                    string bucketName = m_primPropertyBucketMap[property];
                    //m_bucketSyncTainted[bucketName] = true;
                    m_bucketSyncInfoList[bucketName].TaintBucketLocally();

                   // m_log.Debug(this.Name + ": " + property.ToString() + " just changed. Tainted " + bucketName);
                    
                    // m_log.DebugFormat("{0}: TaintBucketSyncInfo: tainting bucket {1} for {2}", 
                    //             "[SCENE OBJECT PART]", bucketName, property.ToString());
                }
            }
        }


        public bool HasPropertyUpdatedLocally(string bucketName)
        {
            return m_bucketSyncInfoList[bucketName].LocallyTainted;
        }

        public bool HasPropertyUpdatedBySync(string bucketName)
        {
            return m_bucketSyncInfoList[bucketName].TaintedBySync;
        }

        /// <summary>
        /// Update the timestamp information of each property bucket, and clear out the taint on each bucket.
        /// </summary>
        public void UpdateTaintedBucketSyncInfo()
        {
            if (m_syncEnabled)
            {
                long timeStamp = DateTime.Now.Ticks;
                foreach (KeyValuePair<string, BucketSyncInfo> pair in m_bucketSyncInfoList)
                {
                    string bucketName = pair.Key;
                    if (m_bucketSyncInfoList[bucketName].LocallyTainted)
                    {
                        m_bucketSyncInfoList[bucketName].UpdateSyncInfoAndClearTaint(timeStamp, m_localActorID);
                    }
                }
            }
        }


        /// <summary>
        /// Update the timestamp information of each property bucket, and clear out the taint on each bucket. This function won't
        /// clear the taints. Caller should clear the taints if needed.
        /// </summary>
        /// <param name="timeStamp">the timestamp value to be set for any updated bucket</param>
        public void UpdateTaintedBucketSyncInfo(long timeStamp)
        {
            if (m_syncEnabled)
            {
                foreach (KeyValuePair<string, BucketSyncInfo> pair in m_bucketSyncInfoList)
                {
                    string bucketName = pair.Key;
                    if (m_bucketSyncInfoList[bucketName].LocallyTainted)
                    {
                        m_bucketSyncInfoList[bucketName].UpdateSyncInfoAndClearTaint(timeStamp, m_localActorID);
                    }
                }
            }
        }

        public void UpdateTaintedBucketSyncInfo(string bucketName, long timeStamp)
        {
            if (m_syncEnabled)
            {
                if (m_bucketSyncInfoList[bucketName].LocallyTainted)
                {
                    m_bucketSyncInfoList[bucketName].UpdateSyncInfoAndClearTaint(timeStamp, m_localActorID);
                }
            }
        }

        /// <summary>
        /// Update the timestamp and actorID information of the bucket the given property belongs to. 
        /// </summary>
        /// <param name="propertyName">Name of the property. Make sure the spelling is consistent with what are defined in PropertyList</param>
        public void UpdateBucketSyncInfo(SceneObjectPartSyncProperties property)
        {
            if (m_syncEnabled && m_bucketSyncInfoList != null && m_bucketSyncInfoList.Count > 0)
            {
                //int bucketIndex = m_primPropertyBucketMap[propertyName];
                string bucketName = m_primPropertyBucketMap[property];
                long timeStamp = DateTime.Now.Ticks;
                if (m_bucketSyncInfoList.ContainsKey(bucketName))
                {
                    m_bucketSyncInfoList[bucketName].UpdateSyncInfoAndClearTaint(timeStamp, m_localActorID);
                }
                else
                {
                    m_log.Warn("No SyncInfo of bucket (name: " + bucketName + ") found");
                }
            }
        }

        public void UpdateAllBucketSyncInfo(long timeStamp)
        {
            if (m_syncEnabled)
            {
                foreach (KeyValuePair<string, BucketSyncInfo> pair in m_bucketSyncInfoList)
                {
                    string bucketName = pair.Key;
                    BucketSyncInfo syncInfo= pair.Value;
                    syncInfo.UpdateSyncInfoAndClearTaint(timeStamp, m_localActorID);
                }
            }
        }

        public Scene.ObjectUpdateResult UpdateAllProperties(SceneObjectPart updatedPart)
        {

            ////////////////////Assumptions: ////////////////////
            //(1) prim's UUID and LocalID shall not change (UUID is the unique identifies, LocalID is used to refer to the prim by, say scripts)
            //(2) RegionHandle won't be updated -- each copy of Scene is hosted on a region with different region handle
            //(3) ParentID won't be updated -- if the rootpart of the SceneObjectGroup changed, that will be updated in SceneObjectGroup.UpdateObjectProperties

            ////////////////////Furture enhancements:////////////////////
            //For now, we only update the set of properties that are included in serialization, and some PhysicsActor properties 
            //See RegionSyncModule.PupolatePropertyBuketMapByDefault for the properties that are handled.

            if (updatedPart == null)
                return Scene.ObjectUpdateResult.Error;

            //Compate the timestamp of each bucket and update the properties if needed

            Scene.ObjectUpdateResult partUpdateResult = Scene.ObjectUpdateResult.Unchanged;

            for (int i = 0; i < m_propertyBucketNames.Count; i++)
            {
                string bucketName = m_propertyBucketNames[i];
                //First, compare the bucket's timestamp and actorID
                if (m_bucketSyncInfoList[bucketName].LastUpdateTimeStamp > updatedPart.BucketSyncInfoList[bucketName].LastUpdateTimeStamp)
                {
                    //Our timestamp is more update to date, keep our values of the properties. Do not update anything.
                    continue;
                }

                if (m_bucketSyncInfoList[bucketName].LastUpdateTimeStamp == updatedPart.BucketSyncInfoList[bucketName].LastUpdateTimeStamp)
                {
                    if (!m_bucketSyncInfoList[bucketName].LastUpdateActorID.Equals(updatedPart.BucketSyncInfoList[bucketName].LastUpdateActorID))
                    {
                        m_log.Warn("Different actors modified SceneObjetPart " + Name+"," +UUID + ", bucket "+bucketName+", with the same TimeStamp (" 
                            + m_bucketSyncInfoList[bucketName].LastUpdateActorID
                            + "," + updatedPart.BucketSyncInfoList[bucketName].LastUpdateActorID + 
                            ", CONFLICT RESOLUTION TO BE IMPLEMENTED, PICK A WINNER!!!!");
                    }
                    //TODO: conflict resolution to be implemented -- pick a winner
                    continue;
                }

                //Second, if need to update local properties, call each bucket's update process
                if (m_bucketUpdateProcessors.ContainsKey(bucketName))
                {
                    //m_log.Debug("Update properties in " + bucketName + " buckets");

                    m_bucketUpdateProcessors[bucketName](updatedPart, bucketName);
                    partUpdateResult = Scene.ObjectUpdateResult.Updated;
                }
                else
                {
                    m_log.Warn("No update processor for property bucket " + bucketName);
                }


            }

            return partUpdateResult;

        }

        /// <summary>
        /// Update values of property in the given bucket. 
        /// </summary>
        /// <param name="bucketName">The bucket that the properties belong to.</param>
        /// <param name="updatedPart">A container of the updated properties. Only the values of the updated properties are set.</param>
        /// <param name="rBucketSyncInfo">A copy of the sync info of the bucket on the sender's (who sends out the syn message) side.</param>
        /// <returns></returns>
        public Scene.ObjectUpdateResult UpdateBucketProperties(string bucketName, Object updatedPart, BucketSyncInfo rBucketSyncInfo)
        {
            Scene.ObjectUpdateResult partUpdateResult = Scene.ObjectUpdateResult.Unchanged;

            if (!m_bucketSyncInfoList.ContainsKey(bucketName))
            {
                m_log.Error("SceneObjectPart.UpdateBucketProperties: no bucket name " + bucketName + " defined");
                return partUpdateResult;
            }

            if (m_bucketSyncInfoList[bucketName].LastUpdateTimeStamp > rBucketSyncInfo.LastUpdateTimeStamp)
            {
                //Our timestamp is more update to date, keep our values of the properties. Do not update anything.
                return partUpdateResult;
            }

            if (m_bucketSyncInfoList[bucketName].LastUpdateTimeStamp == rBucketSyncInfo.LastUpdateTimeStamp)
            {
                if (!m_bucketSyncInfoList[bucketName].LastUpdateActorID.Equals(rBucketSyncInfo.LastUpdateActorID))
                {
                    m_log.Warn("UpdateBucketProperties: Different actors modified SceneObjetPart " + Name + "," + UUID + ", bucket " + bucketName + ", with the same TimeStamp ("
                        + m_bucketSyncInfoList[bucketName].LastUpdateActorID
                        + "," + rBucketSyncInfo.LastUpdateActorID +
                        ", CONFLICT RESOLUTION TO BE IMPLEMENTED, PICK A WINNER!!!!");
                }
                //TODO: conflict resolution to be implemented -- pick a winner
                return partUpdateResult;
            }
            

            m_bucketUpdateProcessors[bucketName](updatedPart, bucketName);
            partUpdateResult = Scene.ObjectUpdateResult.Updated;

            return partUpdateResult;
        }

        //Implementation of ScheduleFullUpdate and ScheduleTerseUpdate for Bucket 
        //based synchronization
        /*
        public override void ScheduleFullUpdate(List<SceneObjectPartProperties> updatedProperties)
        {
            if (updatedProperties != null && updatedProperties.Count > 0)
            {
                foreach (SceneObjectPartProperties property in updatedProperties)
                {
                    TaintBucketSyncInfo(property);
                }
            }
            base.ScheduleFullUpdate(updatedProperties);
            //TaintBucketSyncInfo(property);
        }

        public override void ScheduleTerseUpdate(List<SceneObjectPartProperties> updatedProperties)
        {
            if (updatedProperties != null && updatedProperties.Count > 0)
            {
                //m_log.DebugFormat("{0}: Tainting bucket for properties {1}", 
                //            "[SCENE OBJECT PART]", updatedProperties.ToString());
                foreach (SceneObjectPartProperties property in updatedProperties)
                {
                    TaintBucketSyncInfo(property);
                }
            }
            base.ScheduleTerseUpdate(updatedProperties);
            //TaintBucketSyncInfo(property);
        }
         * */

        //Implementation of ScheduleFullUpdate and ScheduleTerseUpdate for Bucket 
        //based synchronization
        public override void ScheduleFullUpdate(List<SceneObjectPartSyncProperties> updatedProperties)
        {
            if (updatedProperties != null && updatedProperties.Count > 0)
            {
                if (m_parentGroup != null && m_parentGroup.Scene != null && m_parentGroup.Scene.RegionSyncModule != null)
                {
                    /*
                    if (updatedProperties.Contains(SceneObjectPartSyncProperties.Shape))
                    {
                        m_log.DebugFormat("{0}, {1} -- calling ProcessAndEnqueuePrimUpdatesByLocal to update to Shape {2}", Name, UUID, Shape.ProfileShape);
                    }
                     * */
                    m_parentGroup.Scene.RegionSyncModule.ProcessAndEnqueuePrimUpdatesByLocal(this, updatedProperties);
                }
                else
                {
                    if (updatedProperties.Contains(SceneObjectPartSyncProperties.Shape))
                    {
                        m_log.DebugFormat("{0}, {1} Shape changed to {2}, but this SOP not attached to Scene yet", Name, UUID, Shape.ProfileShape);
                    }
                }
            }

            base.ScheduleFullUpdate(updatedProperties);
        }

        public override void ScheduleTerseUpdate(List<SceneObjectPartSyncProperties> updatedProperties)
        {
            if (updatedProperties != null && updatedProperties.Count > 0)
            {
                if (m_parentGroup != null && m_parentGroup.Scene != null && m_parentGroup.Scene.RegionSyncModule != null)
                {
                    m_parentGroup.Scene.RegionSyncModule.ProcessAndEnqueuePrimUpdatesByLocal(this, updatedProperties);
                }
            }

            base.ScheduleTerseUpdate(updatedProperties);
        }


        /// <summary>
        /// Schedules this prim for a full update, without changing the timestamp or actorID (info on when and who modified any property).
        /// NOTE: this is the same as the original SceneObjectPart.ScheduleFullUpdate().
        /// </summary>
        public void ScheduleFullUpdate_SyncInfoUnchanged()
        {
            base.ScheduleFullUpdate(null);
        }

        public bool UpdateCollisionSound(UUID updatedCollisionSound)
        {
            if (this.CollisionSound != updatedCollisionSound)
            {
                m_collisionSound = updatedCollisionSound;
                return true;
            }
            return false;
        }

        public override void PhysicsCollision(EventArgs e)
        {
            if (m_parentGroup.Scene.RegionSyncModule != null)
            {
                CollisionEventUpdate a = (CollisionEventUpdate)e;
                Dictionary<uint, ContactPoint> collisionswith = a.m_objCollisionList;
                OSDArray collisionLocalIDs = new OSDArray();
                foreach (uint collisionObject in collisionswith.Keys)
                {
                    collisionLocalIDs.Add(collisionObject);
                }
                object[] eventArgs = new object[2];
                eventArgs[0] = this.UUID;
                eventArgs[1] = collisionLocalIDs;
                m_parentGroup.Scene.RegionSyncModule.PublishSceneEvent(EventManager.EventNames.PhysicsCollision, eventArgs);
            }
            PhysicsCollisionLocally(e);
        }

        public void PhysicsCollisionLocally(EventArgs e)
        {
            base.PhysicsCollision(e);
        }

        ///////////////////////////////////////////////////////////////////////
        //Per property sync functions
        ///////////////////////////////////////////////////////////////////////


        //For debugging, same implemenation with PropertySerializer.SerializeShape
        private string SerializeShape()
        {
            string serializedShape;
            using (StringWriter sw = new StringWriter())
            {
                using (XmlTextWriter writer = new XmlTextWriter(sw))
                {
                    SceneObjectSerializer.WriteShape(writer, Shape, new Dictionary<string, object>());
                }
                serializedShape = sw.ToString();
            }
            return serializedShape;
        }
    }

    //end of DSG SYNC
}