/*
* private int AstarSearch(Board current, GameController.SearchRule rule, List<GameController.Pair> mousePath) {
* List<Board> openList = new List<Board>();
* List<Board> closeList = new List<Board>();
* Board checkBoard;
* current.Gn = 0;
* current.Hn = HnForAStar(current,rule);
*
* openList.Add(current);
*
* int p = 0;
* while (openList.Count > 0)
* {
* p++;
* openList.Sort(new myComparer());
* checkBoard = openList[0];
* openList.Remove(openList[0]);
* closeList.Add(checkBoard);
*
* // check cheeses
* List<GameController.Pair> current_cheeses = new List<GameController.Pair>();
* for (int i = 0; i < checkBoard.cheeses.Count; i++)
* {
* if (checkBoard.mouse.r == checkBoard.cheeses[i].r && checkBoard.mouse.c == checkBoard.cheeses[i].c)
* {
* continue;
* }
* else
* {
* current_cheeses.Add(checkBoard.cheeses[i]);
* }
* }
* if (current_cheeses.Count <= 0)
* {
* continue;
* }
* // check catching
* if (checkBoard.cat.r == checkBoard.mouse.r && checkBoard.cat.c == checkBoard.mouse.c)
* {
* Board temp = checkBoard;
* while (temp != null)
* {
* path.Insert(0, temp.cat);
* temp = temp.parent;
* }
* path.Remove(path[0]);
* break;
* }
*
* List<GameController.Pair> candidates = FindCandidates(checkBoard.cat);
* for (int i = 0; i < candidates.Count; i++)
* {
* Board next = new Board(checkBoard.turns + 1, checkBoard, new List<Board> (), current_cheeses, mousePath[checkBoard.turns], candidates[i]);
* next.Hn = HnForAStar(next, rule);
* next.Gn = next.turns;
*
* Board findBoard = FindBoard(openList, next);
* if (findBoard != null)
* {
* if (findBoard.Gn > next.Gn) {
* ChangeParent(findBoard, next);
* }
* }
* else {
* findBoard = FindBoard(closeList, next);
* if (FindBoard(closeList, next)!=null)
* {
* if (findBoard.Gn > next.Gn)
* {
* ChangeParent(findBoard, next);
* }
* }
* else
* {
* checkBoard.children.Add(next);
* openList.Add(next);
* }
* }
* }
* }
* return p;
* }
*/
public static List <GameController.Pair> FindCandidates(GameController.Pair pos, GameObject[,] board)
{
int width = board.GetLength(1);
int height = board.GetLength(0);
List <GameController.Pair> candidates = new List <GameController.Pair>();
GameController.Pair p;
int r = pos.r;
int c = pos.c;
p = new GameController.Pair();
p.r = r - 2;
p.c = c - 1;
candidates.Add(p);
p = new GameController.Pair();
p.r = r - 2;
p.c = c + 1;
candidates.Add(p);
p = new GameController.Pair();
p.r = r - 1;
p.c = c + 2;
candidates.Add(p);
p = new GameController.Pair();
p.r = r + 1;
p.c = c + 2;
candidates.Add(p);
p = new GameController.Pair();
p.r = r + 2;
p.c = c + 1;
candidates.Add(p);
p = new GameController.Pair();
p.r = r + 2;
p.c = c - 1;
candidates.Add(p);
p = new GameController.Pair();
p.r = r + 1;
p.c = c - 2;
candidates.Add(p);
p = new GameController.Pair();
p.r = r - 1;
p.c = c - 2;
candidates.Add(p);
for (int i = candidates.Count - 1; i >= 0; i--)
{
if (candidates[i].r < 0 || candidates[i].r >= height || candidates[i].c < 0 || candidates[i].c >= width)
{
candidates.Remove(candidates[i]);
}
}
return(candidates);
}
public static List <GameController.Pair> FindCandidates(GameController.Pair pos, int width, int height)
{
List <GameController.Pair> candidates = new List <GameController.Pair>();
GameController.Pair p;
int r = pos.r;
int c = pos.c;
p = new GameController.Pair();
p.r = r + 1;
p.c = c + 1;
candidates.Add(p);
p = new GameController.Pair();
p.r = r - 1;
p.c = c - 1;
candidates.Add(p);
p = new GameController.Pair();
p.r = r - 1;
p.c = c;
candidates.Add(p);
p = new GameController.Pair();
p.r = r - 1;
p.c = c + 1;
candidates.Add(p);
p = new GameController.Pair();
p.r = r;
p.c = c + 1;
candidates.Add(p);
p = new GameController.Pair();
p.r = r + 1;
p.c = c;
candidates.Add(p);
p = new GameController.Pair();
p.r = r + 1;
p.c = c - 1;
candidates.Add(p);
p = new GameController.Pair();
p.r = r;
p.c = c - 1;
candidates.Add(p);
for (int i = candidates.Count - 1; i >= 0; i--)
{
if (candidates[i].r < 0 || candidates[i].r >= height || candidates[i].c < 0 || candidates[i].c >= width)
{
candidates.Remove(candidates[i]);
}
}
return(candidates);
}
public Board(int t, Board p, List <Board> c, List <GameController.Pair> ch, GameController.Pair m, GameController.Pair ca)
{
turns = t;
parent = p;
children = c;
cheeses = ch;
mouse = m;
cat = ca;
}
public Board()
{
turns = 0;
parent = null;
children = new List <Board>();
cheeses = new List <GameController.Pair>();
mouse = new GameController.Pair();
cat = new GameController.Pair();
}
public static GameController.Pair NextStep(GameController.Pair pos, List <GameController.Pair> cheeses, int width, int height)
{
float minDis = 10000000;
int index = 0;
float distance;
List <GameController.Pair> candidates = FindCandidates(pos, width, height);
for (int i = 0; i < candidates.Count; i++)
{
for (int j = 0; j < cheeses.Count; j++)
{
distance = GameController.Distance(candidates[i], cheeses[j]);
if (distance < minDis)
{
minDis = distance;
index = i;
}
}
}
return(candidates[index]);
}
