public long CountNumberOfD3Cubes()
{
for (var iteration = 0; iteration < 6; iteration++)
{
IterateCubes();
}
return(D3Cubes.Count(x => x.IsActive));
}
public Computer(string input)
{
var rows = input.Split("\n");
for (var yAxis = 0; yAxis < rows.Length; yAxis++)
{
for (var xAxis = 0; xAxis < rows[yAxis].Length; xAxis++)
{
D3Cubes.Add(new D3Cube(rows[yAxis][xAxis] == '#', xAxis, yAxis));
D4Cubes.Add(new D4Cube(rows[yAxis][xAxis] == '#', xAxis, yAxis));
}
}
}
private void PrintCubeState()
{
foreach (var zAxis in D3Cubes.GroupBy(x => x.Location.Z))
{
Console.WriteLine($"z={zAxis.Key}");
foreach (var yAxis in zAxis
.OrderBy(c => c.Location.Y)
.GroupBy(c => c.Location.Y))
{
Console.WriteLine(yAxis.OrderBy(c => c.Location.X).Aggregate(string.Empty,
(current, xAxis) => current + (xAxis.IsActive ? '#' : '.')) + " " +
yAxis.Key);
}
Console.WriteLine("");
}
Console.WriteLine("-------");
}
private void IterateCubes()
{
var grid = new List <D3Cube>();
foreach (var neighbour in D3Cubes
.Where(c => c.IsActive)
.Select(cube => cube.GetNeighbours())
.SelectMany(neighbours => neighbours))
{
if (grid.Any(x => x.Location == neighbour))
{
continue;
}
var current = D3Cubes.Any(c => c.Location == neighbour)
? D3Cubes.FirstOrDefault(c => c.Location == neighbour)
: new D3Cube(neighbour);
var activeNeighbours = D3Cubes
.Count(c =>
current.GetNeighbours().Contains(c.Location) &&
c.Location != current.Location &&
c.IsActive
);
if (activeNeighbours == 3 || (current.IsActive && activeNeighbours == 2))
{
current.IsActive = true;
}
else
{
current.IsActive = false;
}
grid.Add(current);
}
D3Cubes = grid;
}
