public SnakeTableStateMachine()
{
_currentState = SnakeStatesTypes.NORTH;
// initialize table
_stateMachine = new StateAction[4, 3];
_stateMachine[(int)SnakeStatesTypes.NORTH, (int)InputType.LEFT] = new StateAction()
{
State = SnakeStatesTypes.WEST, Action = SnakeStatesTypes.WEST
};
_stateMachine[(int)SnakeStatesTypes.NORTH, (int)InputType.RIGHT] = new StateAction()
{
State = SnakeStatesTypes.EAST, Action = SnakeStatesTypes.EAST
};
_stateMachine[(int)SnakeStatesTypes.NORTH, (int)InputType.FORWARD] = new StateAction()
{
State = SnakeStatesTypes.NORTH, Action = SnakeStatesTypes.NORTH
};
_stateMachine[(int)SnakeStatesTypes.EAST, (int)InputType.LEFT] = new StateAction()
{
State = SnakeStatesTypes.NORTH, Action = SnakeStatesTypes.NORTH
};
_stateMachine[(int)SnakeStatesTypes.EAST, (int)InputType.RIGHT] = new StateAction()
{
State = SnakeStatesTypes.SOUTH, Action = SnakeStatesTypes.SOUTH
};
_stateMachine[(int)SnakeStatesTypes.EAST, (int)InputType.FORWARD] = new StateAction()
{
State = SnakeStatesTypes.EAST, Action = SnakeStatesTypes.EAST
};
_stateMachine[(int)SnakeStatesTypes.WEST, (int)InputType.LEFT] = new StateAction()
{
State = SnakeStatesTypes.SOUTH, Action = SnakeStatesTypes.SOUTH
};
_stateMachine[(int)SnakeStatesTypes.WEST, (int)InputType.RIGHT] = new StateAction()
{
State = SnakeStatesTypes.NORTH, Action = SnakeStatesTypes.NORTH
};
_stateMachine[(int)SnakeStatesTypes.WEST, (int)InputType.FORWARD] = new StateAction()
{
State = SnakeStatesTypes.WEST, Action = SnakeStatesTypes.WEST
};
_stateMachine[(int)SnakeStatesTypes.SOUTH, (int)InputType.LEFT] = new StateAction()
{
State = SnakeStatesTypes.EAST, Action = SnakeStatesTypes.EAST
};
_stateMachine[(int)SnakeStatesTypes.SOUTH, (int)InputType.RIGHT] = new StateAction()
{
State = SnakeStatesTypes.WEST, Action = SnakeStatesTypes.WEST
};
_stateMachine[(int)SnakeStatesTypes.SOUTH, (int)InputType.FORWARD] = new StateAction()
{
State = SnakeStatesTypes.SOUTH, Action = SnakeStatesTypes.SOUTH
};
}
public SnakeStatesTypes NextMove(InputType input)
{
// Find next move from current state and input
SnakeStatesTypes nextMove = _stateMachine[(int)_currentState, (int)input].Action;
// Find next state from current state and input
_currentState = _stateMachine[(int)_currentState, (int)input].State;
return(nextMove);
}
public SnakeStatesTypes NextMove(InputType input)
{
// Find next move from current state and input
SnakeStatesTypes nextMove = _currentState.NextAction(input);
// Find next state from current state and input
_currentState = _currentState.NextState(input);
return(nextMove);
}
public void Start()
{
SnakePlayground pg = new SnakePlayground(20, 20);
// using table state machine
//IState stateMachine = new SnakeTableStateMachine();
// using state machine pattern
IState stateMachine = new SnakeStateMachinePattern();
bool gameContinue = true;
while (gameContinue)
{
InputType nextInput = ReadNextEvent();
SnakeStatesTypes nextMove = stateMachine.NextMove(nextInput);
gameContinue = pg.DoNextMove(nextMove);
}
Console.WriteLine("You loose :-( ");
}
public bool DoNextMove(SnakeStatesTypes move)
{
bool inside = true;
switch (move)
{
case SnakeStatesTypes.NORTH:
_headrow--;
break;
case SnakeStatesTypes.SOUTH:
_headrow++;
break;
case SnakeStatesTypes.EAST:
_headcol++;
break;
case SnakeStatesTypes.WEST:
_headcol--;
break;
}
// check if snake is moving outside playground
if (_headrow == maxHeight || _headrow == -1 ||
_headcol == maxWidth || _headcol == -1)
{
inside = false; // snake is outside playground
}
else
{
PrintPlayground(); // snake still inside
}
return(inside);
}
