public ClusterLeaf <T> GetLeaf(double locationX, double locationY)
{
// find the right child cluster
int index = GetLocationIndex(locationX, locationY);
if (childClusters[index] == null)
{
int xf = ((locationX - X) > (childClusterSize)) ? 1 : 0;
int yf = ((locationY - Y) > (childClusterSize)) ? 1 : 0;
double newClusterX = X + ((childClusterSize) * xf);
double newClusterY = Y + ((childClusterSize) * yf);
if (childClusterSize > MinZoom)
{
childClusters[index] = new ClusterHierarchy <T>(this, childClusterSize, newClusterX, newClusterY);
}
else
{
childClusters[index] = new ClusterLeaf <T>(this, childClusterSize, newClusterX, newClusterY);
}
}
if (childClusters[index] is ClusterHierarchy <T> )
{
return(((ClusterHierarchy <T>)childClusters[index]).GetLeaf(locationX, locationY));
}
else if (childClusters[index] is ClusterLeaf <T> )
{
return((ClusterLeaf <T>)childClusters[index]);
}
else
{
// something went wrong
return(null);
}
}
// this is for debugging purposes only - it creates the clusters upfront
public void CreateDebugHierarchy()
{
for (long xf = 0; xf < 2; xf++)
{
for (long yf = 0; yf < 2; yf++)
{
double newClusterX = X + (childClusterSize * xf);
double newClusterY = Y + (childClusterSize * yf);
if (childClusterSize > MinZoom)
{
var h = new ClusterHierarchy <T>(this, childClusterSize, newClusterX, newClusterY);
childClusters[xf + (yf * 2)] = h;
h.CreateDebugHierarchy();
}
else
{
childClusters[xf + (yf * 2)] = new ClusterLeaf <T>(this, childClusterSize, newClusterX, newClusterY);
}
}
}
}
public List <ClusterLeaf <T> > GetLeafs()
{
List <ClusterLeaf <T> > leafs = new List <ClusterLeaf <T> >();
for (int i = 0; i < NR_OF_CLUSTERS; i++)
{
if (childClusters[i] != null)
{
if (childClusters[i] is ClusterHierarchy <T> )
{
ClusterHierarchy <T> h = childClusters[i] as ClusterHierarchy <T>;
leafs.AddRange(h.GetLeafs());
}
else if (childClusters[i] is ClusterLeaf <T> )
{
leafs.Add((ClusterLeaf <T>)childClusters[i]);
}
}
}
return(leafs);
}
