public void TestGetLowerTile()
{
var tile = new TileIndex(-1, -1, 1);
var lowerTile = tile.GetLowerTile();
Assert.AreEqual(new TileIndex(-1, -1, 0), lowerTile);
Assert.AreEqual(new TileIndex(0, 0, 0), new TileIndex(1, 1, 1).GetLowerTile());
}
public void TestGetLowerTile()
{
var tile = new TileIndex(-1, -1, 1);
var lowerTile = tile.GetLowerTile();
Assert.AreEqual(new TileIndex(-1, -1, 0), lowerTile);
Assert.AreEqual(new TileIndex(0, 0, 0), new TileIndex(1, 1, 1).GetLowerTile());
}
public bool Contains(TileIndex id)
{
int level = id.Level;
if (level < minLevel || level > maxLevel)
return false;
TileIndex parent = id.GetLowerTile(levelDelta);
ulong cacheLine;
if (cache.TryGetValue(parent, out cacheLine))
{
int x = id.X - parent.X * levelSize;
int y = id.Y - parent.Y * levelSize;
int position = x * levelSize + y;
return (cacheLine & ((ulong)1 << position)) != 0;
}
return false;
}
public void Add(TileIndex id, bool exists)
{
ulong cacheLine = 0;
TileIndex parent = id.GetLowerTile(levelDelta);
cache.TryGetValue(parent, out cacheLine);
int x = id.X - parent.X * levelSize;
int y = id.Y - parent.Y * levelSize;
int position = x * levelSize + y;
if (exists)
{
cacheLine |= ((ulong)1) << position;
}
else
{
cacheLine &= ~(((ulong)1) << position);
}
cache[parent] = cacheLine;
}
