// builds all the tiles and assigns bombs to them
private void PlaceMines(int firstIndex)
{
//long start = DateTime.Now.Ticks;
// hold the tiles to exclude from being a mine
HashSet <int> excludedIndices = new HashSet <int>();
excludedIndices.Add(firstIndex);
// for a zero start game all the adjacent tile can't be mines either
if (this.description.gameType == GameType.Zero)
{
foreach (int adjIndex in GetAdjacentIndex(firstIndex))
{
excludedIndices.Add(adjIndex);
}
}
// create a list of all included indices
List <int> indices = new List <int>();
for (int y = 0; y < this.description.height; y++)
{
for (int x = 0; x < this.description.width; x++)
{
int i = GetIndex(x, y);
if (!excludedIndices.Contains(i))
{
indices.Add(i);
}
}
}
// shuffle the indices using a seed
indices.Shuffle(seed);
// allocate the mines and calculate the values
for (int i = 0; i < description.mines; i++)
{
int index = indices[i];
MinesweeperTile tile = tiles[index];
//Utility.Write("Setting " + tile.AsText() + " to be a mine");
tile.SetMine(true); // this is set to be a mine
// set each affected tile to have an increased 'value'
foreach (int adjIndex in GetAdjacentIndex(tile.GetIndex()))
{
tiles[adjIndex].IncrementValue();
}
}
this.gameStatus = GameStatus.InPlay;
//Write("Ticks to place mines on MinesweeperTiles " + (DateTime.Now.Ticks - start));
}
