1 files changed, 277 insertions, 0 deletions
diff --git a/src/yapf/yapf_rail.cpp b/src/yapf/yapf_rail.cpp
new file mode 100644
index 000000000..1461b9402
--- /dev/null
+++ b/src/yapf/yapf_rail.cpp
@@ -0,0 +1,277 @@
+/* $Id$ */
+
+#include "../stdafx.h"
+
+#include "yapf.hpp"
+#include "yapf_node_rail.hpp"
+#include "yapf_costrail.hpp"
+#include "yapf_destrail.hpp"
+
+int _total_pf_time_us = 0;
+
+
+
+
+
+template <class Types>
+class CYapfFollowAnyDepotRailT
+{
+public:
+	typedef typename Types::Tpf Tpf;                     ///< the pathfinder class (derived from THIS class)
+	typedef typename Types::TrackFollower TrackFollower;
+	typedef typename Types::NodeList::Titem Node;        ///< this will be our node type
+	typedef typename Node::Key Key;                      ///< key to hash tables
+
+protected:
+	/// to access inherited path finder
+	FORCEINLINE Tpf& Yapf() {return *static_cast<Tpf*>(this);}
+
+public:
+	/** Called by YAPF to move from the given node to the next tile. For each
+	 *  reachable trackdir on the new tile creates new node, initializes it
+	 *  and adds it to the open list by calling Yapf().AddNewNode(n) */
+	inline void PfFollowNode(Node& old_node)
+	{
+		TrackFollower F(Yapf().GetVehicle());
+		if (F.Follow(old_node.GetLastTile(), old_node.GetLastTrackdir()))
+			Yapf().AddMultipleNodes(&old_node, F.m_new_tile, F.m_new_td_bits);
+	}
+
+	/// return debug report character to identify the transportation type
+	FORCEINLINE char TransportTypeChar() const {return 't';}
+
+	static bool stFindNearestDepotTwoWay(Vehicle *v, TileIndex t1, Trackdir td1, TileIndex t2, Trackdir td2, int max_distance, int reverse_penalty, TileIndex* depot_tile, bool* reversed)
+	{
+		Tpf pf;
+		return pf.FindNearestDepotTwoWay(v, t1, td1, t2, td2, max_distance, reverse_penalty, depot_tile, reversed);
+	}
+
+	FORCEINLINE bool FindNearestDepotTwoWay(Vehicle *v, TileIndex t1, Trackdir td1, TileIndex t2, Trackdir td2, int max_distance, int reverse_penalty, TileIndex* depot_tile, bool* reversed)
+	{
+		// set origin and destination nodes
+		Yapf().SetOrigin(t1, td1, t2, td2, reverse_penalty, true);
+		Yapf().SetDestination(v);
+		Yapf().SetMaxCost(YAPF_TILE_LENGTH * max_distance);
+
+		// find the best path
+		bool bFound = Yapf().FindPath(v);
+		if (!bFound) return false;
+
+		// some path found
+		// get found depot tile
+		Node& n = Yapf().GetBestNode();
+		*depot_tile = n.GetLastTile();
+
+		// walk through the path back to the origin
+		Node* pNode = &n;
+		while (pNode->m_parent != NULL) {
+			pNode = pNode->m_parent;
+		}
+
+		// if the origin node is our front vehicle tile/Trackdir then we didn't reverse
+		// but we can also look at the cost (== 0 -> not reversed, == reverse_penalty -> reversed)
+		*reversed = (pNode->m_cost != 0);
+
+		return true;
+	}
+};
+
+template <class Types>
+class CYapfFollowRailT
+{
+public:
+	typedef typename Types::Tpf Tpf;                     ///< the pathfinder class (derived from THIS class)
+	typedef typename Types::TrackFollower TrackFollower;
+	typedef typename Types::NodeList::Titem Node;        ///< this will be our node type
+	typedef typename Node::Key Key;                      ///< key to hash tables
+
+protected:
+	/// to access inherited path finder
+	FORCEINLINE Tpf& Yapf() {return *static_cast<Tpf*>(this);}
+
+public:
+	/** Called by YAPF to move from the given node to the next tile. For each
+	 *  reachable trackdir on the new tile creates new node, initializes it
+	 *  and adds it to the open list by calling Yapf().AddNewNode(n) */
+	inline void PfFollowNode(Node& old_node)
+	{
+		TrackFollower F(Yapf().GetVehicle());
+		if (F.Follow(old_node.GetLastTile(), old_node.GetLastTrackdir()))
+			Yapf().AddMultipleNodes(&old_node, F.m_new_tile, F.m_new_td_bits);
+	}
+
+	/// return debug report character to identify the transportation type
+	FORCEINLINE char TransportTypeChar() const {return 't';}
+
+	static Trackdir stChooseRailTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackdirBits trackdirs, bool *path_not_found)
+	{
+		// create pathfinder instance
+		Tpf pf;
+		return pf.ChooseRailTrack(v, tile, enterdir, trackdirs, path_not_found);
+	}
+
+	FORCEINLINE Trackdir ChooseRailTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackdirBits trackdirs, bool *path_not_found)
+	{
+		// set origin and destination nodes
+		Yapf().SetOrigin(v->tile, GetVehicleTrackdir(v), INVALID_TILE, INVALID_TRACKDIR, 1, true);
+		Yapf().SetDestination(v);
+
+		// find the best path
+		bool path_found = Yapf().FindPath(v);
+		if (path_not_found != NULL) {
+			// tell controller that the path was only 'guessed'
+			// treat the path as found if stopped on the first two way signal(s)
+			*path_not_found = !(path_found || Yapf().m_stopped_on_first_two_way_signal);
+		}
+
+		// if path not found - return INVALID_TRACKDIR
+		Trackdir next_trackdir = INVALID_TRACKDIR;
+		Node* pNode = &Yapf().GetBestNode();
+		if (pNode != NULL) {
+			// path was found or at least suggested
+			// walk through the path back to the origin
+			Node* pPrev = NULL;
+			while (pNode->m_parent != NULL) {
+				pPrev = pNode;
+				pNode = pNode->m_parent;
+			}
+			// return trackdir from the best origin node (one of start nodes)
+			Node& best_next_node = *pPrev;
+			assert(best_next_node.GetTile() == tile);
+			next_trackdir = best_next_node.GetTrackdir();
+		}
+		return next_trackdir;
+	}
+
+	static bool stCheckReverseTrain(Vehicle* v, TileIndex t1, Trackdir td1, TileIndex t2, Trackdir td2)
+	{
+		Tpf pf;
+		return pf.CheckReverseTrain(v, t1, td1, t2, td2);
+	}
+
+	FORCEINLINE bool CheckReverseTrain(Vehicle* v, TileIndex t1, Trackdir td1, TileIndex t2, Trackdir td2)
+	{
+		// create pathfinder instance
+		// set origin and destination nodes
+		Yapf().SetOrigin(t1, td1, t2, td2, 1, false);
+		Yapf().SetDestination(v);
+
+		// find the best path
+		bool bFound = Yapf().FindPath(v);
+
+		if (!bFound) return false;
+
+		// path was found
+		// walk through the path back to the origin
+		Node* pNode = &Yapf().GetBestNode();
+		while (pNode->m_parent != NULL) {
+			pNode = pNode->m_parent;
+		}
+
+		// check if it was reversed origin
+		Node& best_org_node = *pNode;
+		bool reversed = (best_org_node.m_cost != 0);
+		return reversed;
+	}
+};
+
+template <class Tpf_, class Ttrack_follower, class Tnode_list, template <class Types> class TdestinationT, template <class Types> class TfollowT>
+struct CYapfRail_TypesT
+{
+	typedef CYapfRail_TypesT<Tpf_, Ttrack_follower, Tnode_list, TdestinationT, TfollowT>  Types;
+
+	typedef Tpf_                                Tpf;
+	typedef Ttrack_follower                     TrackFollower;
+	typedef Tnode_list                          NodeList;
+	typedef CYapfBaseT<Types>                   PfBase;
+	typedef TfollowT<Types>                     PfFollow;
+	typedef CYapfOriginTileTwoWayT<Types>       PfOrigin;
+	typedef TdestinationT<Types>                PfDestination;
+	typedef CYapfSegmentCostCacheGlobalT<Types> PfCache;
+	typedef CYapfCostRailT<Types>               PfCost;
+};
+
+struct CYapfRail1         : CYapfT<CYapfRail_TypesT<CYapfRail1        , CFollowTrackRail    , CRailNodeListTrackDir, CYapfDestinationTileOrStationRailT, CYapfFollowRailT> > {};
+struct CYapfRail2         : CYapfT<CYapfRail_TypesT<CYapfRail2        , CFollowTrackRail    , CRailNodeListExitDir , CYapfDestinationTileOrStationRailT, CYapfFollowRailT> > {};
+struct CYapfRail3         : CYapfT<CYapfRail_TypesT<CYapfRail3        , CFollowTrackRailNo90, CRailNodeListTrackDir, CYapfDestinationTileOrStationRailT, CYapfFollowRailT> > {};
+
+struct CYapfAnyDepotRail1 : CYapfT<CYapfRail_TypesT<CYapfAnyDepotRail1, CFollowTrackRail    , CRailNodeListTrackDir, CYapfDestinationAnyDepotRailT     , CYapfFollowAnyDepotRailT> > {};
+struct CYapfAnyDepotRail2 : CYapfT<CYapfRail_TypesT<CYapfAnyDepotRail2, CFollowTrackRail    , CRailNodeListExitDir , CYapfDestinationAnyDepotRailT     , CYapfFollowAnyDepotRailT> > {};
+struct CYapfAnyDepotRail3 : CYapfT<CYapfRail_TypesT<CYapfAnyDepotRail3, CFollowTrackRailNo90, CRailNodeListTrackDir, CYapfDestinationAnyDepotRailT     , CYapfFollowAnyDepotRailT> > {};
+
+
+Trackdir YapfChooseRailTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackdirBits trackdirs, bool *path_not_found)
+{
+	// default is YAPF type 2
+	typedef Trackdir (*PfnChooseRailTrack)(Vehicle*, TileIndex, DiagDirection, TrackdirBits, bool*);
+	PfnChooseRailTrack pfnChooseRailTrack = &CYapfRail2::stChooseRailTrack;
+
+	// check if non-default YAPF type needed
+	if (_patches.forbid_90_deg)
+		pfnChooseRailTrack = &CYapfRail3::stChooseRailTrack; // Trackdir, forbid 90-deg
+	else if (_patches.yapf.disable_node_optimization)
+		pfnChooseRailTrack = &CYapfRail1::stChooseRailTrack; // Trackdir, allow 90-deg
+
+	Trackdir td_ret = pfnChooseRailTrack(v, tile, enterdir, trackdirs, path_not_found);
+
+	return td_ret;
+}
+
+bool YapfCheckReverseTrain(Vehicle* v)
+{
+	// tile where the engine is
+	TileIndex tile = v->tile;
+	// tile where we have last wagon
+	Vehicle* last_veh = GetLastVehicleInChain(v);
+	// if we are in tunnel then give up
+	if (v->u.rail.track == 0x40 || last_veh->u.rail.track == 0x40) return false;
+	// get trackdirs of both ends
+	Trackdir td = GetVehicleTrackdir(v);
+	Trackdir td_rev = ReverseTrackdir(GetVehicleTrackdir(last_veh));
+
+
+	typedef bool (*PfnCheckReverseTrain)(Vehicle*, TileIndex, Trackdir, TileIndex, Trackdir);
+	PfnCheckReverseTrain pfnCheckReverseTrain = CYapfRail2::stCheckReverseTrain;
+
+	// check if non-default YAPF type needed
+	if (_patches.forbid_90_deg)
+		pfnCheckReverseTrain = &CYapfRail3::stCheckReverseTrain; // Trackdir, forbid 90-deg
+	else if (_patches.yapf.disable_node_optimization)
+		pfnCheckReverseTrain = &CYapfRail1::stCheckReverseTrain; // Trackdir, allow 90-deg
+
+	bool reverse = pfnCheckReverseTrain(v, tile, td, last_veh->tile, td_rev);
+
+	return reverse;
+}
+
+bool YapfFindNearestRailDepotTwoWay(Vehicle *v, int max_distance, int reverse_penalty, TileIndex* depot_tile, bool* reversed)
+{
+	*depot_tile = INVALID_TILE;
+	*reversed = false;
+
+	Vehicle* last_veh = GetLastVehicleInChain(v);
+
+	TileIndex tile = v->tile;
+	TileIndex last_tile = last_veh->tile;
+
+	// their trackdirs
+	Trackdir td = GetVehicleTrackdir(v);
+	Trackdir td_rev = ReverseTrackdir(GetVehicleTrackdir(last_veh));
+
+	typedef bool (*PfnFindNearestDepotTwoWay)(Vehicle*, TileIndex, Trackdir, TileIndex, Trackdir, int, int, TileIndex*, bool*);
+	PfnFindNearestDepotTwoWay pfnFindNearestDepotTwoWay = &CYapfAnyDepotRail2::stFindNearestDepotTwoWay;
+
+	// check if non-default YAPF type needed
+	if (_patches.forbid_90_deg)
+		pfnFindNearestDepotTwoWay = &CYapfAnyDepotRail3::stFindNearestDepotTwoWay; // Trackdir, forbid 90-deg
+	else if (_patches.yapf.disable_node_optimization)
+		pfnFindNearestDepotTwoWay = &CYapfAnyDepotRail1::stFindNearestDepotTwoWay; // Trackdir, allow 90-deg
+
+	bool ret = pfnFindNearestDepotTwoWay(v, tile, td, last_tile, td_rev, max_distance, reverse_penalty, depot_tile, reversed);
+	return ret;
+}
+
+/** if any track changes, this counter is incremented - that will invalidate segment cost cache */
+int CSegmentCostCacheBase::s_rail_change_counter = 0;
+
+void YapfNotifyTrackLayoutChange(TileIndex tile, Track track) {CSegmentCostCacheBase::NotifyTrackLayoutChange(tile, track);}