code: private void connectToNeighbors(int x, int y ) {
  		List<LineSegment2D_F32> lines = grid.get(x,y);
  
  		Iterator<LineSegment2D_F32> iter = lines.iterator();
  		while( iter.hasNext() )
  		{
  			LineSegment2D_F32 l = iter.next();
  			boolean connected = false;
  
  			if( connectTry(l,x+1,y) )
  				connected = true;
  			if( !connected && connectTry(l,x+1,y+1) )
  				connected = true;
  			if( !connected && connectTry(l,x,y+1) )
  				connected = true;
  			if( !connected && connectTry(l,x-1,y+1) )
  				connected = true;
  
  			// the line was added to the connecting grid
  			// remove it to avoid double counting the line
  			if( connected )
  				iter.remove();
  		}
  	}
docs: Connect lines in the target region to lines in neighboring regions.  Regions are selected such that
  no two regions are compared against each other more than once.
  
  @param x target region grid x-coordinate
  @param y target region grid y-coordinate