/// <summary>
/// Returns a boolean value whether specified state
/// equals to the goal state of problem
/// </summary>
public bool IsGoalState(BoardState state)
{
return(Equals(state, GoalState));
}
public Problem()
{
_initialState = new BoardState().Initialize();
_actionsFunction = state =>
{
var actions = new HashSet <Action>();
var emptyPos = 0;
while (emptyPos < state.Slots.Length)
{
var slot = state.Slots[emptyPos];
if (slot.IsEmpty())
{
break;
}
emptyPos++;
}
if (state.IsBlackBallAt(emptyPos - 1))
{
actions.Add(new Action
{
BallToMove = state.Slots[emptyPos - 1].GetBall(),
Direction = MoveDirection.ToRight,
SourcePosition = emptyPos - 1,
TargetPosition = emptyPos
});
}
if (state.IsBlackBallAt(emptyPos - 2))
{
actions.Add(new Action
{
BallToMove = state.Slots[emptyPos - 2].GetBall(),
Direction = MoveDirection.ToRightWithJump,
SourcePosition = emptyPos - 2,
TargetPosition = emptyPos
});
}
if (state.IsWhiteBallAt(emptyPos + 1))
{
actions.Add(new Action
{
BallToMove = state.Slots[emptyPos + 1].GetBall(),
Direction = MoveDirection.ToLeft,
SourcePosition = emptyPos + 1,
TargetPosition = emptyPos
});
}
if (state.IsWhiteBallAt(emptyPos + 2))
{
actions.Add(new Action
{
BallToMove = state.Slots[emptyPos + 2].GetBall(),
Direction = MoveDirection.ToLeftWithJump,
SourcePosition = emptyPos + 2,
TargetPosition = emptyPos
});
}
return(actions);
};
_resultFunction = (state, action) =>
{
var nextState = new BoardState(state);
nextState.MoveBall(action);
return(nextState);
};
}
public SearchResult(bool?hasSolution, bool isCutOff, ReadOnlyCollection <Action> actions = null, BoardState finalState = null)
{
HasSolution = hasSolution;
IsCutOff = isCutOff;
Actions = actions;
FinalState = finalState;
}
