public InteractiveNPC(World world, int actorSNO, Vector3D position)
     : base(world, actorSNO, position)
 {
     this.Attributes[GameAttribute.NPC_Has_Interact_Options, 0] = true;
     this.Attributes[GameAttribute.NPC_Is_Operatable] = true;
     this.Attributes[GameAttribute.Buff_Visual_Effect, 0x00FFFFF] = true;
 }

        public Projectile(PowerContext context, int actorSNO, Vector3D position)
            : base(context.World, actorSNO)
        {
            this.Field2 = 0x8;
            this.Scale = 1.35f;
            // just use default? GBHandle.Projectile is 10, but most projectiles I see use 17
            //this.GBHandle.Type = (int)GBHandleType.Projectile; this.GBHandle.GBID = 1;
            this.Field7 = 0x00000001;
            // these no longer needed?
            //this.Field10 = 0x1;
            //this.Field11 = 0x1;
            //this.Field12 = 0x1;
            //this.Field13 = 0x1;
            //this.CollFlags = 0x4;
            
            this.Context = context;
            this.Position = new Vector3D(position);
            this.Timeout = new SecondsTickTimer(context.World.Game, 2f);  // 2 second default timeout for projectiles

            // copy in important effect params from user
            this.Attributes[GameAttribute.Rune_A, context.PowerSNO] = context.User.Attributes[GameAttribute.Rune_A, context.PowerSNO];
            this.Attributes[GameAttribute.Rune_B, context.PowerSNO] = context.User.Attributes[GameAttribute.Rune_B, context.PowerSNO];
            this.Attributes[GameAttribute.Rune_C, context.PowerSNO] = context.User.Attributes[GameAttribute.Rune_C, context.PowerSNO];
            this.Attributes[GameAttribute.Rune_D, context.PowerSNO] = context.User.Attributes[GameAttribute.Rune_D, context.PowerSNO];
            this.Attributes[GameAttribute.Rune_E, context.PowerSNO] = context.User.Attributes[GameAttribute.Rune_E, context.PowerSNO];

            _arrivalTime = null;
            _lastUpdateTick = 0;
            _prevUpdatePosition = null;
            _onArrivalCalled = false;

            // offset position by mpq collision data
            this.Position.Z += this.ActorData.Cylinder.Ax1 - this.ActorData.Cylinder.Position.Z;
        }

 /// <summary>
 /// Parses AABB from given GameBitBuffer.
 /// </summary>
 /// <param name="buffer">The GameBitBuffer to parse from.</param>
 public void Parse(GameBitBuffer buffer)
 {
     Min = new Vector3D();
     Min.Parse(buffer);
     Max = new Vector3D();
     Max.Parse(buffer);
 }

        public Living(World world, int actorSNO, Vector3D position, Dictionary<int, TagMapEntry> tags)
            : base(world, world.NewActorID, position, tags )
        {
            this.SNOId = actorSNO;
            // FIXME: This is hardcoded crap
            this.Field3 = 0x0;
            this.RotationAmount = (float)(RandomHelper.NextDouble() * 2.0f * Math.PI);
            this.RotationAxis.X = 0f; this.RotationAxis.Y = 0f; this.RotationAxis.Z = 1f;
            this.GBHandle.Type = -1; this.GBHandle.GBID = -1;
            this.Field7 = 0x00000001;
            this.Field8 = this.SNOId;
            this.Field10 = 0x0;
            this.Field11 = 0x0;
            this.Field12 = 0x0;
            this.Field13 = 0x0;
            this.AnimationSNO = 0x11150;
            this.CollFlags = 1;

            this.Attributes[GameAttribute.Hitpoints_Max_Total] = 4.546875f;
            this.Attributes[GameAttribute.Hitpoints_Max] = 4.546875f;
            this.Attributes[GameAttribute.Hitpoints_Total_From_Level] = 0f;
            this.Attributes[GameAttribute.Hitpoints_Cur] = 4.546875f;

            this.Attributes[GameAttribute.Level] = 1;
        }

 public static Vector3D TranslateDirection2D(Vector3D source, Vector3D destination, Vector3D point, float amount)
 {
     Vector3D norm = Normalize(new Vector3D(destination.X - source.X, destination.Y - source.Y, 0f));
     return new Vector3D(point.X + norm.X * amount,
                         point.Y + norm.Y * amount,
                         point.Z);
 }

 public override void Parse(GameBitBuffer buffer)
 {
     ActorId = buffer.ReadInt(32);
     if (buffer.ReadBool())
     {
         Position = new Vector3D();
         Position.Parse(buffer);
     }
     if (buffer.ReadBool())
     {
         Angle = buffer.ReadFloat32();
     }
     if (buffer.ReadBool())
     {
         TurnImmediately = buffer.ReadBool();
     }
     if (buffer.ReadBool())
     {
         Speed = buffer.ReadFloat32();
     }
     if (buffer.ReadBool())
     {
         Field5 = buffer.ReadInt(25);
     }
     if (buffer.ReadBool())
     {
         AnimationTag = buffer.ReadInt(21) + (-1);
     }
     if (buffer.ReadBool())
     {
         Field7 = buffer.ReadInt(32);
     }
 }

 /// <summary>
 /// Reads PRTransform from given GameBitBuffer.
 /// </summary>
 /// <param name="buffer">The GameBitBuffer to parse from.</param>
 public void Parse(GameBitBuffer buffer)
 {
     Quaternion = new Quaternion();
     Quaternion.Parse(buffer);
     Vector3D = new Vector3D();
     Vector3D.Parse(buffer);
 }

 public Vendor(World world, int actorSNO, Vector3D position, Dictionary<int, TagMapEntry> tags)
     : base(world, actorSNO, position, tags)
 {
     this.Attributes[GameAttribute.MinimapActive] = true;
     _vendorGrid = new InventoryGrid(this, 1, 20, (int) EquipmentSlotId.Vendor);
     PopulateItems();
 }

        public bool RunPower(Actor user, PowerScript power, Actor target = null,
                             Vector3D targetPosition = null, TargetMessage targetMessage = null)
        {
            // replace power with existing channel instance if one exists
            if (power is ChanneledSkill)
            {
                var existingChannel = _FindChannelingSkill(user, power.PowerSNO);
                if (existingChannel != null)
                {
                    power = existingChannel;
                }
                else  // new channeled skill, add it to the list
                {
                    _channeledSkills.Add((ChanneledSkill)power);
                }
            }

            // copy in context params
            power.User = user;
            power.Target = target;
            power.World = user.World;
            power.TargetPosition = targetPosition;
            power.TargetMessage = targetMessage;

            _StartScript(power);
            return true;
        }

 protected void InFrontPostion() // spawn actor in front of user
 {
     float userFacing = (float)Math.Acos(this.User.RotationW) * 2f;
     this.SpawnPosition = new Vector3D(User.Position.X + 8 * (float)Math.Cos(userFacing),
                                      User.Position.Y + 8 * (float)Math.Sin(userFacing),
                                      User.Position.Z);
 }

        private bool _spawned;  // using my own spawn flag cause Actor.Spawned isn't being used right now

        public Projectile(PowerContext context, int actorSNO, Vector3D position)
            : base(context.World, actorSNO)
        {
            this.Field2 = 0x8;
            this.Field7 = 0x00000001;  // TODO: test if this is necessary

            if (this.Scale == 0f)
                this.Scale = 1.00f;

            this.Context = context;
            this.Position = new Vector3D(position);
            // offset position by mpq collision data
            this.Position.Z += this.ActorData.Cylinder.Ax1 - this.ActorData.Cylinder.Position.Z;
            // 2 second default timeout for projectiles
            this.Timeout = new SecondsTickTimer(context.World.Game, 2f);

            // copy in important effect params from user
            this.Attributes[GameAttribute.Rune_A, context.PowerSNO] = context.User.Attributes[GameAttribute.Rune_A, context.PowerSNO];
            this.Attributes[GameAttribute.Rune_B, context.PowerSNO] = context.User.Attributes[GameAttribute.Rune_B, context.PowerSNO];
            this.Attributes[GameAttribute.Rune_C, context.PowerSNO] = context.User.Attributes[GameAttribute.Rune_C, context.PowerSNO];
            this.Attributes[GameAttribute.Rune_D, context.PowerSNO] = context.User.Attributes[GameAttribute.Rune_D, context.PowerSNO];
            this.Attributes[GameAttribute.Rune_E, context.PowerSNO] = context.User.Attributes[GameAttribute.Rune_E, context.PowerSNO];

            _prevUpdatePosition = null;
            _mover = new ActorMover(this);
            _spawned = false;
        }

        public static Actor Create(World world, int snoId, Vector3D position, TagMap tagMap)
        {
            if (!MPQStorage.Data.Assets[SNOGroup.Actor].ContainsKey(snoId))
                return null;

            var actorAsset = MPQStorage.Data.Assets[SNOGroup.Actor][snoId];            
            var actorData = actorAsset.Data as Mooege.Common.MPQ.FileFormats.Actor;
            if (actorData == null) return null;

            if (actorData.Type == ActorType.Invalid) 
                return null;

            // read tagMapEntries and put them into a dictionary
            var tags = tagMap.TagMapEntries.ToDictionary(entry => entry.Int1);

            // see if we have an implementation for actor.
            if (SNOHandlers.ContainsKey(snoId))
                return (Actor) Activator.CreateInstance(SNOHandlers[snoId], new object[] {world, snoId, position, tags});
           
            switch (actorData.Type)
            {
                case ActorType.Monster:
                    return new Monster(world, snoId, position, tags);
                case ActorType.Gizmo:
                    return CreateGizmo(world, snoId, position, tags);

            }

            return null;
        }

        private static Actor CreateGizmo(World world, int snoId, Vector3D position, Dictionary<int,TagMapEntry> tags)
        {
            if (tags.ContainsKey((int)MarkerTagTypes.DestinationWorld))
                return new Portal(world, snoId, position, tags);

            return new Gizmo(world, snoId, position, tags);
        }

        public void Spawn(float facingAngle = 0)
        {
            FacingAngle = (float)Math.Cos(facingAngle / 2f);
            RotationAxis = new Vector3D(0, 0, (float)Math.Sin(facingAngle / 2f));

            this.World.Enter(this);
        }

        /// <summary>
        /// Returns 2D angle to face the target position.
        /// </summary>
        /// <param name="lookerPosition">The looker.</param>
        /// <param name="targetPosition">The target.</param>
        /// <returns></returns>
        public static float GetFacingAngle(Vector3D lookerPosition, Vector3D targetPosition)
        {
            if ((lookerPosition == null) || (targetPosition == null))
                return 0f;

            return (float) Math.Atan2((targetPosition.Y - lookerPosition.Y), (targetPosition.X - lookerPosition.X));
        }

        public static Vector3D GetMovementPosition(Vector3D position, float speed, float facingAngle, int ticks = 6)
        {
            var xDelta = (speed * ticks) * (float)Math.Cos(facingAngle);
            var yDelta = (speed * ticks) * (float)Math.Sin(facingAngle);

            return new Vector3D(position.X + xDelta, position.Y + yDelta, position.Z);
        }

 protected WorldObject(World world, uint dynamicID)
     : base(dynamicID)
 {
     this._world = world; // Specifically avoid calling the potentially overridden setter for this.World /komiga.
     this._world.Game.StartTracking(this);
     this._rotationAxis = new Vector3D();
     this._position = new Vector3D();
 }

        public MoveToPointWithPathfindAction(Actor owner, Vector3D heading)
            : base(owner)
        {
            // Sending a request for a Path to the Pathing thread.
            _pathRequestTask = owner.World.Game.Pathfinder.GetPath(owner, owner.Position, heading);
            this.Heading = heading;

        }

 public override void Parse(GameBitBuffer buffer)
 {
     Field0 = buffer.ReadInt(32);
     Field1 = new Vector3D();
     Field1.Parse(buffer);
     Field2 = new Vector3D();
     Field2.Parse(buffer);
 }

 //This submits a request for a path to the pathfinder thread. This is the main point of entry for usage. - DarkLotus
 public PathRequestTask GetPath(Actor owner, Vector3D vector3D, Vector3D heading)
 {
     if (aipather == null)
         aipather = new Pathfinder();
     var pathRequestTask = new PathRequestTask(aipather, owner, owner.Position, heading);
     _queuedPathTasks.TryAdd(owner.DynamicID, pathRequestTask);
     return pathRequestTask;
 }