public static Node CreateExpanded( Node node, Interval addInterval )
{
Interval expandInt = new Interval( addInterval );
if ( node != null ) expandInt.ExpandToInclude( node.Interval );
Node largerNode = CreateNode( expandInt );
if ( node != null ) largerNode.Insert( node );
return largerNode;
}
private Node CreateSubnode( int index )
{
// create a new subnode in the appropriate interval
double min = 0.0;
double max = 0.0;
switch (index)
{
case 0:
min = _interval.Min;
max = _centre;
break;
case 1:
min = _centre;
max = _interval.Max;
break;
}
Interval subInt = new Interval( min, max );
Node node = new Node (subInt, _level - 1);
return node;
}
public static Node CreateNode( Interval itemInterval )
{
Key key = new Key( itemInterval );
//System.out.println("input: " + env + " binaryEnv: " + key.getEnvelope());
Node node = new Node( key.Interval, key.Level );
return node;
}
void Insert( Node node )
{
Debug.Assert( _interval == null || _interval.Contains( node.Interval ) );
int index = GetSubnodeIndex( node.Interval, _centre );
if ( node.Level == _level - 1 )
{
_subnode[index] = node;
}
else
{
// the node is not a direct child, so make a new child node to contain it
// and recursively insert the node
Node childNode = CreateSubnode( index );
childNode.Insert( node );
_subnode[index] = childNode;
}
}
