//PMC - system {

        public PlayerLocation LastOnGroundLocation = null;

        public bool СheckerIgnore = false;//recommended - disable
        public int UnCheckedTicks = 0;
        public int UnCheckedPackets = 0;

        public const double MADiffD = 1.3;//MaxAllowedDifferenceDefault  //recommended 1.3
        public double MaxAllowedDifference = MADiffD;

        public const double MADistD = 0.615;//MaxAllowedDistanceDefault  //recommended 0.615
        public double PermissibleDifference = 0.025;//recommended 0.025
        public double MaxAllowedDistance = MADistD;
        public int MaxCountOfSpeeding = 5;//recommended 3 - 5 //0 - disabled

        public bool EnabledKicksBySpeeding = true;//recommended - enable
        public int CountOfSpeeding = 0;

        public double maxdist = 0;

        public void UpdateAllowedLocation(PlayerLocation newLocation, int unCheckedTicks = 0, int unCheckedPackets = 0)//обязательно выполнять после любого перемещения игрока!!!
        {
            LastOnGroundLocation = newLocation;
            if (unCheckedTicks > 0)
                UnCheckedTicks = unCheckedTicks;
            if (unCheckedPackets > 0)
                UnCheckedPackets = unCheckedPackets;
        }

        public double MathMaxSpeed(Speed effect)
        {
            if (effect.Level <= 0)
                return MADistD;
            else
                return MADistD * Math.Pow(1.2, effect.Level) + 0.1;
        }

        public double MathMaxJamp(JumpBoost effect)
        {
            if (effect.Level <= 0)
                return MADiffD;
            else
                return MADiffD + (0.5 * effect.Level);
        }

        public override void OnTick()
        {
            if (UnCheckedTicks > 0)
                UnCheckedTicks--;
            base.OnTick();
        }

        protected override bool AcceptPlayerMove(McpeMovePlayer message, bool isOnGround, bool isFlyingHorizontally)
        {
            PlayerLocation newLocation = new PlayerLocation(message.x, message.y, message.z, message.headYaw, message.yaw, message.pitch);
            if (isOnGround)
            {
                LastOnGroundLocation = newLocation;

                if (!IsSpectator && !IsFlying && !СheckerIgnore && UnCheckedPackets <= 0 && UnCheckedTicks <= 0)
                {
                    if (Effects.ContainsKey(EffectType.Speed))
                        MaxAllowedDistance = MathMaxSpeed(Effects[EffectType.Speed] as Speed);
                    else if (MaxAllowedDistance != MADistD)
                        MaxAllowedDistance = MADistD;

                    //if (KnownPosition.FlatDistanceTo(newLocation) > maxdist)
                    //{
                    //    Console.WriteLine($"{KnownPosition.FlatDistanceTo(newLocation)}    {Username}");
                    //    maxdist = KnownPosition.FlatDistanceTo(newLocation);
                    //}

                    double distance = KnownPosition.FlatDistanceTo(newLocation);
                    if (distance > MaxAllowedDistance)
                    {
                        if (Annihilation.Debug) Level.BroadcastMessage($"{CountOfSpeeding}  {KnownPosition.FlatDistanceTo(newLocation)}   {Username}");
                        Teleport(KnownPosition);
                        if (distance - MaxAllowedDistance > PermissibleDifference)
                        {
                            Level.BroadcastMessage($"§8[§2PM§cC§8]§7We detected §2SpeedHack §7from you. Please disable it, if it's really so!");
                            if (MaxCountOfSpeeding > 0)
                                CountOfSpeeding++;
                        }
                        if (CountOfSpeeding >= MaxCountOfSpeeding)
                        {
                            Disconnect("§8[§2PM§cC§8]§7Speeding is not allowed.\n§8[§2PM§cC§8]§7We detected §2SpeedHack §7from you. Please disable it, if it's really so!   §eError code: §4#375.4!");
                            //Level.BroadcastMessage(Username + " возможно читер!!!");
                            return true;
                        }
                    }
                }
            }
            else
            {
                if (!IsSpectator && !IsFlying && !СheckerIgnore && UnCheckedPackets <= 0 && UnCheckedTicks <= 0)
                {
                    double distance = KnownPosition.FlatDistanceTo(newLocation);
                    if (distance > MaxAllowedDistance + 0.1)
                    {
                        Teleport(KnownPosition);
                        if (distance - MaxAllowedDistance + 0.1 > PermissibleDifference)
                        {
                            Level.BroadcastMessage($"§8[§2PM§cC§8]§7We detected §2Flight §7from you. Please disable it, if it's really so!");
                            if (MaxCountOfSpeeding > 0)
                                CountOfSpeeding+=2;
                        }
                        if (CountOfSpeeding >= MaxCountOfSpeeding)
                        {
                            Disconnect("§8[§2PM§cC§8]§7Flight is not allowed.\n§8[§2PM§cC§8]§7We detected §2Flight §7from you. Please disable it, if it's really so!   §eError code: §4#375.2!");
                            //Level.BroadcastMessage(Username + " возможно читер!!!");
                            return true;
                        }
                    }

                    if (isFlyingHorizontally)
                    {
                        if (message.y <= 256)
                        {
                            Disconnect("§8[§2PM§cC§8]§7Flight is not allowed.\n§8[§2PM§cC§8]§7We detected §2Flight §7from you. Please disable it, if it's really so!   §eError code: §4#375.1!");
                            //Level.BroadcastMessage(Username + " возможно читер!!!");
                            return true;
                        }
                    }

                    if (newLocation.Y > LastOnGroundLocation.Y)
                    {
                        if (newLocation.Y - LastOnGroundLocation.Y > maxdist)
                        {
                            Console.WriteLine($"{newLocation.Y - LastOnGroundLocation.Y}    {Username}");
                            maxdist = newLocation.Y - LastOnGroundLocation.Y;
                        }
                        //Console.WriteLine($"{newLocation.Y - LastOnGroundLocation.Y}   {Username}");
                        if (Effects.ContainsKey(EffectType.JumpBoost))
                            MaxAllowedDifference = MathMaxJamp(Effects[EffectType.JumpBoost] as JumpBoost);
                        else if (MaxAllowedDifference != MADiffD)
                            MaxAllowedDifference = MADiffD;
                        if (newLocation.Y - LastOnGroundLocation.Y > MaxAllowedDifference)
                        {
                            Disconnect("§8[§2PM§cC§8]§7Flight and high jumping is not allowed.\n§8[§2PM§cC§8]§7We detected §2Flight §7or §2HighJumping §7from you. Please disable it, if it's really so!   §eError code: §4#375.3!");
                        }
                    }
                    else
                        LastOnGroundLocation = newLocation;
                }
            }
            if (UnCheckedPackets > 0)
                UnCheckedPackets--;
            return base.AcceptPlayerMove(message, isOnGround, isFlyingHorizontally);
        }

        //} PMC - system