public void Initialize(BattleSystem system, BattleQueue queue, SetupParams parameters)
{
_system = system;
_queue = queue;
_stateStart = RegisterState <BattleStateStart>();
_stateInput = RegisterState <BattleStateInput>();
_stateExecute = RegisterState <BattleStateExecute>();
_statePostTurn = RegisterState <BattleStatePostTurn>();
_statePostTurnExecute = RegisterState <BattleStatePostTurnExecute>();
// Register players into battle.
parameters.Players.ForEach(x => system.RegisterPlayer(x.Player, x.FieldSide));
SetState(BattleStateID.Start);
}