private static void DoCycle(ConwayGrid3D grid)
{
var comparer = new ArrayByValueComparer();
int nbActives = grid.PointsAndValues().Where(x => x.Value.before).Count();
Console.WriteLine($"Actives : {nbActives}, Size: [{string.Join(",", grid.Size)}]");
var minIndex = grid.MinKeys.Select(x => x - 1).ToArray();
var maxIndex = grid.MaxKeys.Select(x => x + 1).ToArray();
foreach (var point in grid.PointsAndValues(minIndex, maxIndex))
{
var nbActiveNeihbors = 0;
foreach (var neighbor in grid.AreaSquareAround(point.Key, 1))
{
if (neighbor.Value.before && !comparer.Equals(point.Key, neighbor.Key))
{
nbActiveNeihbors++;
}
}
if (point.Value.before)
{
grid[point.Key] = (point.Value.before, nbActiveNeihbors.Between(2, 3));
}
else
{
grid[point.Key] = (point.Value.before, nbActiveNeihbors == 3);
}
}
}
private static ConwayGrid3D GenerateGrid(bool[,] inputGrid)
{
var grid = new ConwayGrid3D();
for (int y = 0; y < inputGrid.GetLength(0); y++)
{
for (int x = 0; x < inputGrid.GetLength(0); x++)
{
grid[new int[] { y, x, 0 }] = (inputGrid[x, y], inputGrid[x, y]);
}
}
return(grid);
}
//-----------------------------------------------------------------
public override long Part1(string input)
{
var inputGrid = InputParser.ParseBoolGrid(input, '\n', '#');
ConwayGrid3D grid = GenerateGrid(inputGrid);
for (int i = 0; i < 6; i++)
{
DoCycle(grid);
foreach (var point in grid.PointsAndValues(grid.MinKeys, grid.MaxKeys))
{
grid[point.Key] = (grid[point.Key].after, false);
}
}
var nbActives = grid.PointsAndValues().Where(x => x.Value.before).Count();
Console.WriteLine($"Actives : {nbActives}");
return(nbActives);
}
