private void Step()
{
List <int> remove = new List <int>();
HashSet <int> check = new HashSet <int>();
List <int> add = new List <int>();
foreach (KeyValuePair <int, Dot> dot in dots)
{
dot.Value.Update(dots, ref check);
if (dot.Value.Dead)
{
remove.Add(dot.Key);
}
}
foreach (int position in check)
{
if (Dot.CheckNeighbours(dots, position))
{
add.Add(position);
}
}
foreach (int key in remove)
{
dots.Remove(key);
}
foreach (int key in add)
{
dots.Add(key, new Dot(pixelTexture, key));
}
}