public override string ToString()
{
var landString = new StringBuilder();
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
var point = new Point(x, y);
if (Trees.Contains(point))
{
landString.Append('|');
}
else if (Lumberyard.Contains(point))
{
landString.Append('#');
}
else
{
landString.Append('.');
}
}
landString.AppendLine();
}
return(landString.ToString());
}
public Land Next()
{
var newLumberyard = new HashSet <Point>();
var newTrees = new HashSet <Point>();
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
var point = new Point(x, y);
if (Trees.Contains(point))
{
ConvertTree(point, newLumberyard, newTrees);
}
else if (Lumberyard.Contains(point))
{
ConvertLumberyard(point, newLumberyard, newTrees);
}
else
{
ConvertOpen(point, newLumberyard, newTrees);
}
}
}
return(new Land(newLumberyard, newTrees, width, height));
}
private void ConvertTree(Point point, HashSet <Point> newLumberyard, HashSet <Point> newTrees)
{
var adjacent = point.AdjacentInAllDirections()
.Where(p => p.X >= 0 && p.X < width && p.Y >= 0 && p.Y < height)
.ToList();
if (adjacent.Count(a => Lumberyard.Contains(a)) >= 3)
{
newLumberyard.Add(point);
}
else
{
newTrees.Add(point);
}
}
