public static List <(Direction, Quadtree)> EqualNeighbours(Quadtree quadtree)
{
var directions = new[]
{
Direction.North,
Direction.East,
Direction.South,
Direction.West,
};
var equalNeighbours = new List <(Direction, Quadtree)>();
foreach (var direction in directions)
{
bool overflow;
var neighbourLocationCode = quadtree.EqualNeighbourLocationCode(direction.Value, out overflow);
if (overflow)
{
continue;
}
var neighbour = quadtree.Root.Find(neighbourLocationCode);
if (neighbour == null || neighbour.Level != quadtree.Level)
{
continue;
}
equalNeighbours.Add((direction, neighbour));
}
return(equalNeighbours);
}
