private int getNumberOfInternalNeighbours(DelaunayTriangle triangle)
	{
		DelaunayTriangle[] neighbours = triangle.neighbors;
		int nrOfInternals = 0;
		for (int i = 0; i < neighbours.length; i++)
		{
			if ((neighbours[i] != null) && neighbours[i].isInterior())
				nrOfInternals++;
		}
		return nrOfInternals;
	}