private bool ForceBridgeOn(Branch b)
{
Point p = b.Last();
foreach (Point d in Grid.Directions)
{
Point onceOver = Grid.NeigbourCoordinates(p, d);
Point twiceOver = Grid.NeigbourCoordinates(onceOver, d);
if (IsBridge(p, d) && !b.Contains(twiceOver))
{
b.Add(onceOver);
//Pokud jde o horizontální směr, zapamatuj si která barva je nahoře
if (d.Y == 0)
{
Cells[onceOver.X, onceOver.Y] = Cells[p.X, p.Y];
}
b.Add(twiceOver);
if (Cells[twiceOver.X, twiceOver.Y] == Cells[p.X, p.Y])
{
b.Solved = b.Other.Solved = true;
}
else
{
Cells[twiceOver.X, twiceOver.Y] = Cells[p.X, p.Y];
}
return(true);
}
}
return(false);
}
//Provede na větvi vynucený pohyb, pokud existuje
private bool ForcedMove(Branch b)
{
Point p = b.Last();
//Spojí dvě větve stejné barvy, pokud sousedí
foreach (Point d in Grid.Directions)
{
Point onceOver = Grid.NeigbourCoordinates(p, d);
if (Cells[onceOver.X, onceOver.Y] == Cells[p.X, p.Y] && !b.Contains(onceOver) && !IsWall(p, d))
{
if (b.Other.Last() == onceOver)
{
b.Add(onceOver);
b.Solved = b.Other.Solved = true;
return(true);
}
}
}
//Provede pohyb, pokud je z daného místa jediný možný
List <Point> possibleDirs = Grid.Directions.Where(d => IsEmpty(p, d) && !IsBridge(p, d) && !IsWall(p, d)).ToList();
if (possibleDirs.Count == 1)
{
Point d = possibleDirs[0];
Point p1 = Grid.NeigbourCoordinates(p, d);
Cells[p1.X, p1.Y] = Cells[p.X, p.Y];
b.Add(p1);
ForceBridgeOn(b);
return(true);
}
return(false);
}
private bool IsEndOfDifferentColor(Point p, Point d, int color)
{
return(false);
Point p2 = Grid.NeigbourCoordinates(p, d);
return(Branches.Any(b => b.Color != color && b.Last() == p2));
}
private IEnumerable <GridState> BranchNextStates(int i) //Musí se chodit přes index
{
Point be = Branches[i].Last();
var directions = Grid.Directions.Where(d => CanGoTo(Branches[i], d)).OrderBy(d => RateDirection(Branches[i], d)).ToList();
foreach (Point d in directions)
{
Point np = Grid.NeigbourCoordinates(be, d);
GridState newState = new GridState(this);
newState.Branches[i].Add(np);
newState.Cells[np.X, np.Y] = Cells[be.X, be.Y];
newState.MakeForcedMoves();
yield return(newState);
}
}
//Zkontroluje jestli některá branch není zakroucená tak, že by do stejného místa mohla dojít jednodušeji
private bool IsBranchTooComplicated(Branch br)
{
Point be = br.Last();
foreach (Point d in Grid.Directions)
{
if (!IsWall(be, d) && CellTo(be, d) == br.Color)
{
Point meetingPoint = Grid.NeigbourCoordinates(be, d);
var pointsBetween = br.SkipWhile(p => p != meetingPoint);
if (pointsBetween.Count() > 2 && pointsBetween.All(p => !Grid.Bridges[p.X, p.Y]))
{
return(true);
}
}
}
return(false);
}
//Označí pole a všechna sousedící stejným id
private bool MarkCellArea(Point p, int id)
{
if (Areas[p.X, p.Y] == -1 && Cells[p.X, p.Y] == -1 && !Grid.Bridges[p.X, p.Y])
{
Areas[p.X, p.Y] = id;
foreach (Point d in Grid.Directions)
{
if (CanGoTo(p, d))
{
Point neigbour = Grid.NeigbourCoordinates(p, d);
if (Grid.Bridges[neigbour.X, neigbour.Y])
{
neigbour = Grid.NeigbourCoordinates(neigbour, d);
}
MarkCellArea(neigbour, id);
}
}
return(true);
}
return(false);
}
private bool CanGoTo(Point p, Branch br, Point dir)
{
return((IsEmpty(p, dir) || br.Other.Last() == Grid.NeigbourCoordinates(p, dir)) && !IsWall(p, dir));
}
private int RateDirection(Branch br, Point dir)
{
Point nxt = Grid.NeigbourCoordinates(br.Last(), dir);
return(10000 * Grid.Directions.Count(d => CanGoTo(nxt, br, d)) + Grid.Distance(nxt, br.Other.Last()));
}
