public TilePos(TilePos parent, int xIn, int yIn, int startX, int startY)
{
X = xIn;
Y = yIn;
Parent = parent;
Score = Math.Abs(xIn - startX) + Math.Abs(yIn - startY);
}
public override void Update()
{
if (curTile == null)
{
Complete = true;
}
else
{
Vector2 v = character.WalkTowardCenter((curTile.X * Game1.tileSize) + (Game1.tileSize / 2), (curTile.Y * Game1.tileSize) + (Game1.tileSize / 2));
while ((v.X == 0) && (v.Y == 0))
{
if (curTile.Parent == null)
{
v = character.WalkTowardCenter((curTile.X * Game1.tileSize) + (Game1.tileSize / 2), (curTile.Y * Game1.tileSize) + (Game1.tileSize / 2), true);
curTile = curTile.Parent;
Complete = true;
break;
}
else
{
curTile = curTile.Parent;
v = character.WalkTowardCenter((curTile.X * Game1.tileSize) + (Game1.tileSize / 2), (curTile.Y * Game1.tileSize) + (Game1.tileSize / 2));
}
}
}
}
private void FindPath()
{
if (((startX == destX) && (startY == destY)) ||
(startX < 0) ||
(startX >= tileMapW) ||
(startY < 0) ||
(startY >= tileMapH) ||
(destX < 0) ||
(destX >= tileMapW) ||
(destY < 0) ||
(destY >= tileMapH) ||
(location.GetTileTypeIDByTileIndex(destX, destY) <= 0))
{
return;
}
curTile = new TilePos(null, destX, destY, startX, startY);
FastPriorityQueue <TilePos> priorityQueue = new FastPriorityQueue <TilePos>(tileMapW * tileMapH);
while (!((curTile.X == startX) && (curTile.Y == startY)))
{
// check the four sides
TilePos leftTile = new TilePos(curTile, curTile.X - 1, curTile.Y, startX, startY);
TilePos rightTile = new TilePos(curTile, curTile.X + 1, curTile.Y, startX, startY);
TilePos topTile = new TilePos(curTile, curTile.X, curTile.Y - 1, startX, startY);
TilePos bottomTile = new TilePos(curTile, curTile.X, curTile.Y + 1, startX, startY);
if (curTile.Parent != null)
{
if ((curTile.Parent.Equals(leftTile)) || (curTile.Parent.Equals(rightTile)))
{
topTile.Score += 1;
bottomTile.Score += 1;
}
else if ((curTile.Parent.Equals(bottomTile)) || (curTile.Parent.Equals(topTile)))
{
rightTile.Score += 1;
leftTile.Score += 1;
}
}
QueueUp(leftTile, priorityQueue);
QueueUp(rightTile, priorityQueue);
QueueUp(bottomTile, priorityQueue);
QueueUp(topTile, priorityQueue);
curTile = priorityQueue.Dequeue();
}
}
private void QueueUp(TilePos aTile, FastPriorityQueue <TilePos> priorityQueue)
{
if ((aTile.X < 0) ||
(aTile.X >= tileMapW) ||
(aTile.Y < 0) ||
(aTile.Y >= tileMapH) ||
(checkedTiles[aTile.X, aTile.Y]) ||
(location.GetTileTypeIDByTileIndex(aTile.X, aTile.Y) <= 0))
{
return;
}
checkedTiles[aTile.X, aTile.Y] = true;
priorityQueue.Enqueue(aTile, aTile.Score);
}
public MovePathEvent(Location loc, Character c, int startXTile, int startYTile, int destXTile, int destYTile)
{
location = loc;
character = c;
startX = startXTile;
startY = startYTile;
destX = destXTile;
destY = destYTile;
tileMapH = location.TileMapH();
tileMapW = location.TileMapW();
curTile = null;
checkedTiles = new Boolean[tileMapW, tileMapH];
for (int i = 0; i < tileMapW; i++)
{
for (int j = 0; j < tileMapH; j++)
{
checkedTiles[i, j] = false;
}
}
checkedTiles[destX, destY] = true;
GamePaused = false;
FindPath();
}
public Boolean Equals(TilePos t)
{
return((t.X == X) && (t.Y == Y));
}
