/** A rect with all nodes that the bounds could touch.
		 * This correctly handles rotated graphs and other transformations.
		 * The returned rect is guaranteed to not extend outside the graph bounds.
		 */
		protected IntRect GetRectFromBounds (Bounds bounds) {
			// Take the bounds and transform it using the matrix
			// Then convert that to a rectangle which contains
			// all nodes that might be inside the bounds

			bounds = transform.InverseTransform(bounds);
			Vector3 min = bounds.min;
			Vector3 max = bounds.max;

			int minX = Mathf.RoundToInt(min.x-0.5F);
			int maxX = Mathf.RoundToInt(max.x-0.5F);

			int minZ = Mathf.RoundToInt(min.z-0.5F);
			int maxZ = Mathf.RoundToInt(max.z-0.5F);

			var originalRect = new IntRect(minX, minZ, maxX, maxZ);

			// Rect which covers the whole grid
			var gridRect = new IntRect(0, 0, width-1, depth-1);

			// Clamp the rect to the grid
			return IntRect.Intersection(originalRect, gridRect);
		}