/// <summary>Gets the tile based on its row and column.</summary>
public T this[int col, int row]
{
get
{
var c = GridType.IsSpheric() ? col.Mod(Cols) : col;
var r = GridType.IsSpheric() ? row.Mod(Rows) : row;
return(c >= 0 && c < Cols && r >= 0 && r < Rows
? Tiles[Index(c, r)]
: null);
}
}
/// <summary>Initializes a rows * cols sized raster.</summary>
protected virtual void Initialize(int cols, int rows)
{
var neighbors = new SimpleList <Vector>(8);
if (GridType.HasFlag(GridType.Horizontal))
{
neighbors.Add(Vector.W);
neighbors.Add(Vector.E);
}
if (GridType.HasFlag(GridType.Veritical))
{
neighbors.Add(Vector.N);
neighbors.Add(Vector.S);
}
if (GridType.HasFlag(GridType.Diagonal))
{
neighbors.Add(Vector.NE);
neighbors.Add(Vector.NW);
neighbors.Add(Vector.SE);
neighbors.Add(Vector.SW);
}
foreach (var point in Points.Grid(cols, rows))
{
var n = GridType.IsSpheric()
? neighbors.Count
: neighbors.Select(v => point + v).Count(p => OnGrid(p));
var index = Index(point.X, point.Y);
Tiles[index] = Create(index, point.X, point.Y, n);
}
foreach (var tile in Tiles)
{
foreach (var position in neighbors.Select(v => tile.Position + v))
{
var neighbor = this[position];
if (neighbor is ITile)
{
tile.Neighbors.Add(neighbor);
}
}
}
}