public IEnumerable <GameCell> GetAdjacentCells(Pos2D pos)
{
foreach (var dir in new[] { MoveDirection.Up, MoveDirection.Right, MoveDirection.Down, MoveDirection.Left })
{
var cell = GetCell(pos.GetNeighbor(dir));
if (cell != null)
{
yield return(cell);
}
}
}
public void MoveObject(GameObjectBase obj, Pos2D newPos)
{
var currentCell = GetCell(obj.Pos);
currentCell?.RemoveObject(obj);
var newCell = GetCell(newPos);
newCell.AddObject(obj);
ClearVisibilityCache();
}
private static Pos2D CreatePos2DFromString(string input)
{
if (string.IsNullOrWhiteSpace(input))
{
return(new Pos2D());
}
var strings = input.Split(',');
var pos = new Pos2D(int.Parse(strings[0]), int.Parse(strings[1]));
return(pos);
}
public IEnumerable <GameObjectBase> GetTargetsAtPos(Pos2D pos)
{
var cell = GetCell(pos);
if (cell == null)
{
yield break;
}
foreach (var obj in cell.Objects.Where(o => o.IsTargetable))
{
yield return(obj);
}
}
public IEnumerable <GameCell> GetCellAndAdjacent(Pos2D pos)
{
var cell = GetCell(pos);
if (cell != null)
{
yield return(cell);
}
foreach (var adjacentCell in GetAdjacentCells(pos))
{
yield return(adjacentCell);
}
}
public bool HasSightBlocker(Pos2D pos)
{
// Attempt to grab from cache
if (_sightBlockerCache.ContainsKey(pos))
{
return(_sightBlockerCache[pos]);
}
// Calculate whether or not things have a sight blocker
var cell = GetCell(pos);
var hasSightBlocker = cell != null && cell.BlocksSight;
// Cache it for next time
_sightBlockerCache[pos] = hasSightBlocker;
return(hasSightBlocker);
}
public IEnumerable <GameCell> GetCellsInSquare(Pos2D pos, int radius)
{
int minX = pos.X - radius;
int maxX = pos.X + radius;
int minY = pos.Y - radius;
int maxY = pos.Y + radius;
for (int y = minY; y <= maxY; y++)
{
for (int x = minX; x <= maxX; x++)
{
var cell = GetCell(new Pos2D(x, y));
if (cell != null)
{
yield return(cell);
}
}
}
}
/// <summary> /// Gets the cell at the specified position, or returns null if no cell was found. /// </summary> /// <param name="pos">The position.</param> /// <returns>The cell.</returns> public GameCell GetCell(Pos2D pos) => !CellsDictionary.ContainsKey(pos) ? null : _cells[pos];
public bool IsPosExterior(Pos2D pos) => pos.X == UpperLeft.X || pos.X == LowerRight.X || pos.Y == LowerRight.Y || pos.Y == UpperLeft.Y;