// create pathfinder instance

		Tpf pf;

		// set origin and destination nodes

		pf.SetOrigin(src_tile, trackdirs);

		pf.SetDestination(v->dest_tile, dest_trackdirs);

		// find best path

		bool bFound = pf.FindPath(v);

		Trackdir next_trackdir = INVALID_TRACKDIR; // this would mean "path not found"

		if (bFound) {

			// path was found

			// walk through the path back to the origin

			Node* pPrevNode = NULL;

			while (pNode->m_parent != NULL) {

				pPrevNode = pNode;

				pNode = pNode->m_parent;

			}

			// return trackdir from the best next node (direct child of origin)

			Node& best_next_node = *pPrevNode;

			assert(best_next_node.GetTile() == tile);

			next_trackdir = best_next_node.GetTrackdir();

		}

		return next_trackdir;

	}