public override int ActiveNeighbors(Cube cube, bool addIfMissing = true)
{
var neighbours = 0;
int xIndex = cube.x;
int yIndex = cube.y;
int zIndex = cube.z;
int wIndex = (cube as Cube4D).w;
// -1, 0, 1
List <int> xs = Enumerable.Range(-1, 3).Select(nr => nr + xIndex).ToList();
List <int> ys = Enumerable.Range(-1, 3).Select(nr => nr + yIndex).ToList();
List <int> zs = Enumerable.Range(-1, 3).Select(nr => nr + zIndex).ToList();
List <int> ws = Enumerable.Range(-1, 3).Select(nr => nr + wIndex).ToList();
foreach (var x in xs)
{
foreach (var y in ys)
{
foreach (var z in zs)
{
foreach (var w in ws)
{
if (x == xIndex && y == yIndex && z == zIndex && w == wIndex)
{
// this is the cube we have
continue;
}
var index = $"{x},{y},{z},{w}";
if (Cubes.ContainsKey(index))
{
var neighbour = Cubes[index];
if (neighbour.IsActive)
{
neighbours++;
}
}
else if (!NewCubes.ContainsKey(index) && addIfMissing)
{
var newCube = new Cube4D(x, y, z, w);
newCube.IsActive = false;
NewCubes.Add(newCube.Index, newCube);
}
}
}
}
}
return(neighbours);
}
public Cube Neighbour(Position position) => Cubes.ContainsKey(position.ToString()) ? Cubes[position.ToString()] : null;
public IEnumerable <Cube> Neighbours() => Position.Neighbours().Select(n => Cubes.ContainsKey(n.ToString()) ? Cubes[n.ToString()] : null);