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-rw-r--r--src/yapf/yapf_rail.cpp149
1 files changed, 133 insertions, 16 deletions
diff --git a/src/yapf/yapf_rail.cpp b/src/yapf/yapf_rail.cpp
index 7d7d4ee38..f49d543b9 100644
--- a/src/yapf/yapf_rail.cpp
+++ b/src/yapf/yapf_rail.cpp
@@ -9,6 +9,7 @@
#include "yapf_costrail.hpp"
#include "yapf_destrail.hpp"
#include "../vehicle_func.h"
+#include "../pbs.h"
#define DEBUG_YAPF_CACHE 0
@@ -16,7 +17,115 @@ int _total_pf_time_us = 0;
+template <class Types>
+class CYapfReserveTrack
+{
+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
+
+protected:
+ /// to access inherited pathfinder
+ FORCEINLINE Tpf& Yapf() {return *static_cast<Tpf*>(this);}
+
+private:
+ TileIndex m_res_dest; ///< The reservation target tile
+ Trackdir m_res_dest_td; ///< The reservation target trackdir
+ Node *m_res_node; ///< The reservation target node
+ TileIndex m_res_fail_tile; ///< The tile where the reservation failed
+ Trackdir m_res_fail_td; ///< The trackdir where the reservation failed
+
+ bool FindSafePositionProc(TileIndex tile, Trackdir td)
+ {
+ if (IsSafeWaitingPosition(Yapf().GetVehicle(), tile, td, true, !TrackFollower::Allow90degTurns())) {
+ m_res_dest = tile;
+ m_res_dest_td = td;
+ return false; // Stop iterating segment
+ }
+ return true;
+ }
+
+ bool ReserveSingleTrack(TileIndex tile, Trackdir td)
+ {
+ if (!TryReserveRailTrack(tile, TrackdirToTrack(td))) {
+ /* Tile couldn't be reserved, undo. */
+ m_res_fail_tile = tile;
+ m_res_fail_td = td;
+ return false;
+ }
+ /* YAPF can sometimes skip parts of a station, so make sure we
+ * always reserve the whole platform. */
+ if (IsRailwayStationTile(tile)) SetRailwayStationPlatformReservation(tile, TrackdirToExitdir(ReverseTrackdir(td)), true);
+ return tile != m_res_dest;
+ }
+
+ bool UnreserveSingleTrack(TileIndex tile, Trackdir td)
+ {
+ if (tile != m_res_fail_tile || td != m_res_fail_td) UnreserveRailTrack(tile, TrackdirToTrack(td));
+ return tile != m_res_dest && (tile != m_res_fail_tile || td != m_res_fail_td);
+ }
+
+public:
+ /** Set the target to where the reservation should be extended. */
+ inline void SetReservationTarget(Node *node, TileIndex tile, Trackdir td)
+ {
+ m_res_node = node;
+ m_res_dest = tile;
+ m_res_dest_td = td;
+ }
+ /** Check the node for a possible reservation target. */
+ inline void FindSafePositionOnNode(Node *node)
+ {
+ assert(node->m_parent != NULL);
+
+ /* We will never pass more than two signals, no need to check for a safe tile. */
+ if (node->m_parent->m_num_signals_passed >= 2) return;
+
+ if (!node->IterateTiles(Yapf().GetVehicle(), Yapf(), *this, &CYapfReserveTrack<Types>::FindSafePositionProc)) {
+ m_res_node = node;
+ }
+ }
+
+ /** Try to reserve the path till the reservation target. */
+ bool TryReservePath(PBSTileInfo *target)
+ {
+ m_res_fail_tile = INVALID_TILE;
+
+ if (target != NULL) {
+ target->tile = m_res_dest;
+ target->trackdir = m_res_dest_td;
+ target->okay = false;
+ }
+
+ /* Don't bother if the target is reserved. */
+ if (!IsWaitingPositionFree(Yapf().GetVehicle(), m_res_dest, m_res_dest_td)) return false;
+
+ for (Node *node = m_res_node; node->m_parent != NULL; node = node->m_parent) {
+ node->IterateTiles(Yapf().GetVehicle(), Yapf(), *this, &CYapfReserveTrack<Types>::ReserveSingleTrack);
+ if (m_res_fail_tile != INVALID_TILE) {
+ /* Reservation failed, undo. */
+ Node *fail_node = m_res_node;
+ TileIndex stop_tile = m_res_fail_tile;
+ do {
+ /* If this is the node that failed, stop at the failed tile. */
+ m_res_fail_tile = fail_node == node ? stop_tile : INVALID_TILE;
+ fail_node->IterateTiles(Yapf().GetVehicle(), Yapf(), *this, &CYapfReserveTrack<Types>::UnreserveSingleTrack);
+ } while (fail_node != node && (fail_node = fail_node->m_parent) != NULL);
+
+ return false;
+ }
+ }
+
+ if (target != NULL) target->okay = true;
+
+ if (Yapf().CanUseGlobalCache(*m_res_node))
+ YapfNotifyTrackLayoutChange(INVALID_TILE, INVALID_TRACK);
+
+ return true;
+ }
+};
template <class Types>
class CYapfFollowAnyDepotRailT
@@ -95,7 +204,7 @@ public:
};
template <class Types>
-class CYapfFollowRailT
+class CYapfFollowRailT : protected CYapfReserveTrack<Types>
{
public:
typedef typename Types::Tpf Tpf; ///< the pathfinder class (derived from THIS class)
@@ -121,16 +230,18 @@ public:
/// return debug report character to identify the transportation type
FORCEINLINE char TransportTypeChar() const {return 't';}
- static Trackdir stChooseRailTrack(const Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool *path_not_found)
+ static Trackdir stChooseRailTrack(const Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool *path_not_found, bool reserve_track, PBSTileInfo *target)
{
// create pathfinder instance
Tpf pf1;
- Trackdir result1 = pf1.ChooseRailTrack(v, tile, enterdir, tracks, path_not_found);
+#if !DEBUG_YAPF_CACHE
+ Trackdir result1 = pf1.ChooseRailTrack(v, tile, enterdir, tracks, path_not_found, reserve_track, target);
-#if DEBUG_YAPF_CACHE
+#else
+ Trackdir result1 = pf1.ChooseRailTrack(v, tile, enterdir, tracks, path_not_found, false, NULL);
Tpf pf2;
pf2.DisableCache(true);
- Trackdir result2 = pf2.ChooseRailTrack(v, tile, enterdir, tracks, path_not_found);
+ Trackdir result2 = pf2.ChooseRailTrack(v, tile, enterdir, tracks, path_not_found, reserve_track, target);
if (result1 != result2) {
DEBUG(yapf, 0, "CACHE ERROR: ChooseRailTrack() = [%d, %d]", result1, result2);
DumpTarget dmp1, dmp2;
@@ -148,10 +259,13 @@ public:
return result1;
}
- FORCEINLINE Trackdir ChooseRailTrack(const Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool *path_not_found)
+ FORCEINLINE Trackdir ChooseRailTrack(const Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool *path_not_found, bool reserve_track, PBSTileInfo *target)
{
+ if (target != NULL) target->tile = INVALID_TILE;
+
// set origin and destination nodes
- Yapf().SetOrigin(v->tile, GetVehicleTrackdir(v), INVALID_TILE, INVALID_TRACKDIR, 1, true);
+ PBSTileInfo origin = FollowTrainReservation(v);
+ Yapf().SetOrigin(origin.tile, origin.trackdir, INVALID_TILE, INVALID_TRACKDIR, 1, true);
Yapf().SetDestination(v);
// find the best path
@@ -166,17 +280,23 @@ public:
Trackdir next_trackdir = INVALID_TRACKDIR;
Node *pNode = Yapf().GetBestNode();
if (pNode != NULL) {
+ // reserve till end of path
+ this->SetReservationTarget(pNode, pNode->GetLastTile(), pNode->GetLastTrackdir());
+
// 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;
+
+ this->FindSafePositionOnNode(pPrev);
}
// 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();
+
+ if (reserve_track && path_found) this->TryReservePath(target);
}
return next_trackdir;
}
@@ -247,10 +367,10 @@ struct CYapfAnyDepotRail1 : CYapfT<CYapfRail_TypesT<CYapfAnyDepotRail1, CFollowT
struct CYapfAnyDepotRail2 : CYapfT<CYapfRail_TypesT<CYapfAnyDepotRail2, CFollowTrackRailNo90, CRailNodeListTrackDir, CYapfDestinationAnyDepotRailT , CYapfFollowAnyDepotRailT> > {};
-Trackdir YapfChooseRailTrack(const Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool *path_not_found)
+Trackdir YapfChooseRailTrack(const Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool *path_not_found, bool reserve_track, PBSTileInfo *target)
{
// default is YAPF type 2
- typedef Trackdir (*PfnChooseRailTrack)(const Vehicle*, TileIndex, DiagDirection, TrackBits, bool*);
+ typedef Trackdir (*PfnChooseRailTrack)(const Vehicle*, TileIndex, DiagDirection, TrackBits, bool*, bool, PBSTileInfo*);
PfnChooseRailTrack pfnChooseRailTrack = &CYapfRail1::stChooseRailTrack;
// check if non-default YAPF type needed
@@ -258,7 +378,7 @@ Trackdir YapfChooseRailTrack(const Vehicle *v, TileIndex tile, DiagDirection ent
pfnChooseRailTrack = &CYapfRail2::stChooseRailTrack; // Trackdir, forbid 90-deg
}
- Trackdir td_ret = pfnChooseRailTrack(v, tile, enterdir, tracks, path_not_found);
+ Trackdir td_ret = pfnChooseRailTrack(v, tile, enterdir, tracks, path_not_found, reserve_track, target);
return td_ret;
}
@@ -330,11 +450,8 @@ bool YapfFindNearestRailDepotTwoWay(const Vehicle *v, int max_distance, int reve
const Vehicle *last_veh = GetLastVehicleInChain(v);
- TileIndex tile = v->tile;
+ PBSTileInfo origin = FollowTrainReservation(v);
TileIndex last_tile = last_veh->tile;
-
- // their trackdirs
- Trackdir td = GetVehicleTrackdir(v);
Trackdir td_rev = ReverseTrackdir(GetVehicleTrackdir(last_veh));
typedef bool (*PfnFindNearestDepotTwoWay)(const Vehicle*, TileIndex, Trackdir, TileIndex, Trackdir, int, int, TileIndex*, bool*);
@@ -345,7 +462,7 @@ bool YapfFindNearestRailDepotTwoWay(const Vehicle *v, int max_distance, int reve
pfnFindNearestDepotTwoWay = &CYapfAnyDepotRail2::stFindNearestDepotTwoWay; // Trackdir, forbid 90-deg
}
- bool ret = pfnFindNearestDepotTwoWay(v, tile, td, last_tile, td_rev, max_distance, reverse_penalty, depot_tile, reversed);
+ bool ret = pfnFindNearestDepotTwoWay(v, origin.tile, origin.trackdir, last_tile, td_rev, max_distance, reverse_penalty, depot_tile, reversed);
return ret;
}
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-30 20:03:37 +0000