/// <summary>
/// Get surrounding coordinates within field boundary
/// </summary>
/// <param name="mine">
/// Mine position
/// </param>
/// <param name="width">
/// Field width
/// </param>
/// <param name="height">
/// Field height
/// </param>
/// <returns>
/// Enumerable of surroudning cell coords
/// </returns>
private IEnumerable <Tuple <int, int> > GetSurroundingCoordinates(MinePoint mine, int width, int height)
{
var cells = new List <Tuple <int, int> >();
// go around mine cell
for (var x = -1; x <= 1; x++)
{
for (var y = -1; y <= 1; y++)
{
// center
if ((x == 0) && (y == 0))
{
continue;
}
// find coordinates of x-y cell related to mine
var cx = mine.X + x;
var cy = mine.Y + y;
// if cell is within mine field boundaries, add it to list
if ((cx >= 0) && (cx < width) && (cy >= 0) && (cy < height))
{
cells.Add(new Tuple <int, int>(cx, cy));
}
}
}
return(cells);
}
/// <summary>
/// Increment surrounding fields by 1
/// </summary>
/// <param name="mine">
/// Mine position
/// </param>
/// <param name="field">
/// Mine field counter
/// </param>
private void IncrementCounter(MinePoint mine, int[,] field)
{
var width = field.GetLength(1);
var height = field.GetLength(0);
foreach (var cellCoordinates in GetSurroundingCoordinates(mine, width, height))
{
var x = cellCoordinates.Item1;
var y = cellCoordinates.Item2;
// increment value
++field[y, x];
}
}