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-rw-r--r--src/saveload.cpp2
-rw-r--r--src/settings.cpp4
-rw-r--r--src/settings_type.h4
-rw-r--r--src/train.h2
-rw-r--r--src/train_cmd.cpp216
5 files changed, 200 insertions, 28 deletions
diff --git a/src/saveload.cpp b/src/saveload.cpp
index 640ebcc7f..a05302a1c 100644
--- a/src/saveload.cpp
+++ b/src/saveload.cpp
@@ -36,7 +36,7 @@
#include "table/strings.h"
-extern const uint16 SAVEGAME_VERSION = 99;
+extern const uint16 SAVEGAME_VERSION = 100;
SavegameType _savegame_type; ///< type of savegame we are loading
diff --git a/src/settings.cpp b/src/settings.cpp
index dd2451802..359c6ed25 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1690,6 +1690,10 @@ const SettingDesc _patch_settings[] = {
SDT_VAR(GameSettings, pf.wait_twoway_signal, SLE_UINT8, 0, 0, 41, 2, 100, 0, STR_NULL, NULL),
SDT_CONDLISTO(GameSettings, economy.town_noise_population, 3, SLE_UINT16, 96, SL_MAX_VERSION, 0,D0, "800,2000,4000", STR_NULL, NULL, CheckNoiseToleranceLevel),
+ SDT_CONDVAR(GameSettings, pf.wait_for_pbs_path, SLE_UINT8,100, SL_MAX_VERSION, 0, 0, 30, 2, 255, 0, STR_NULL, NULL),
+ SDT_CONDBOOL(GameSettings, pf.reserve_paths, 100, SL_MAX_VERSION, 0, 0, false, STR_NULL, NULL),
+ SDT_CONDVAR(GameSettings, pf.path_backoff_interval, SLE_UINT8,100, SL_MAX_VERSION, 0, 0, 20, 1, 255, 0, STR_NULL, NULL),
+
SDT_VAR(GameSettings, pf.opf.pf_maxlength, SLE_UINT16, 0, 0, 4096, 64, 65535, 0, STR_NULL, NULL),
SDT_VAR(GameSettings, pf.opf.pf_maxdepth, SLE_UINT8, 0, 0, 48, 4, 255, 0, STR_NULL, NULL),
diff --git a/src/settings_type.h b/src/settings_type.h
index 493e60118..c7341cd5a 100644
--- a/src/settings_type.h
+++ b/src/settings_type.h
@@ -244,6 +244,10 @@ struct PathfinderSettings {
byte wait_oneway_signal; ///< waitingtime in days before a oneway signal
byte wait_twoway_signal; ///< waitingtime in days before a twoway signal
+ bool reserve_paths; ///< always reserve paths regardless of signal type.
+ byte wait_for_pbs_path; ///< how long to wait for a path reservation.
+ byte path_backoff_interval; ///< ticks between checks for a free path.
+
OPFSettings opf; ///< pathfinder settings for the old pathfinder
NPFSettings npf; ///< pathfinder settings for the new pathfinder
YAPFSettings yapf; ///< pathfinder settings for the yet another pathfinder
diff --git a/src/train.h b/src/train.h
index 7f7cb6166..81b512c1b 100644
--- a/src/train.h
+++ b/src/train.h
@@ -273,6 +273,8 @@ int CheckTrainStoppedInDepot(const Vehicle *v);
void UpdateTrainAcceleration(Vehicle* v);
void CheckTrainsLengths();
+void FreeTrainTrackReservation(const Vehicle *v, TileIndex origin = INVALID_TILE, Trackdir orig_td = INVALID_TRACKDIR);
+
/**
* This class 'wraps' Vehicle; you do not actually instantiate this class.
* You create a Vehicle using AllocateVehicle, so it is added to the pool
diff --git a/src/train_cmd.cpp b/src/train_cmd.cpp
index f29838dc1..3176b7fe1 100644
--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -33,6 +33,7 @@
#include "newgrf_text.h"
#include "direction_func.h"
#include "yapf/yapf.h"
+#include "yapf/follow_track.hpp"
#include "cargotype.h"
#include "group.h"
#include "table/sprites.h"
@@ -58,6 +59,7 @@
#include "table/strings.h"
#include "table/train_cmd.h"
+static Track ChooseTrainTrack(Vehicle* v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool force_res, bool *got_reservation, bool mark_stuck);
static bool TrainCheckIfLineEnds(Vehicle *v);
static void TrainController(Vehicle *v, Vehicle *nomove, bool update_image);
static TileIndex TrainApproachingCrossingTile(const Vehicle *v);
@@ -2133,14 +2135,17 @@ static TrainFindDepotData FindClosestTrainDepot(Vehicle *v, int max_distance)
tfdd.best_length = UINT_MAX;
tfdd.reverse = false;
- TileIndex tile = v->tile;
- if (IsRailDepotTile(tile)) {
- tfdd.tile = tile;
+ PBSTileInfo origin = FollowTrainReservation(v);
+ if (IsRailDepotTile(origin.tile)) {
+ tfdd.tile = origin.tile;
tfdd.best_length = 0;
return tfdd;
}
- switch (_settings_game.pf.pathfinder_for_trains) {
+ uint8 pathfinder = _settings_game.pf.pathfinder_for_trains;
+ if ((_settings_game.pf.reserve_paths || HasReservedTracks(v->tile, v->u.rail.track)) && pathfinder == VPF_NTP) pathfinder = VPF_NPF;
+
+ switch (pathfinder) {
case VPF_YAPF: { /* YAPF */
bool found = YapfFindNearestRailDepotTwoWay(v, max_distance, NPF_INFINITE_PENALTY, &tfdd.tile, &tfdd.reverse);
tfdd.best_length = found ? max_distance / 2 : UINT_MAX; // some fake distance or NOT_FOUND
@@ -2169,12 +2174,12 @@ static TrainFindDepotData FindClosestTrainDepot(Vehicle *v, int max_distance)
case VPF_NTP: { /* NTP */
/* search in the forward direction first. */
DiagDirection i = TrainExitDir(v->direction, v->u.rail.track);
- NewTrainPathfind(tile, 0, v->u.rail.compatible_railtypes, i, (NTPEnumProc*)NtpCallbFindDepot, &tfdd);
+ NewTrainPathfind(v->tile, 0, v->u.rail.compatible_railtypes, i, (NTPEnumProc*)NtpCallbFindDepot, &tfdd);
if (tfdd.best_length == UINT_MAX){
tfdd.reverse = true;
/* search in backwards direction */
i = TrainExitDir(ReverseDir(v->direction), v->u.rail.track);
- NewTrainPathfind(tile, 0, v->u.rail.compatible_railtypes, i, (NTPEnumProc*)NtpCallbFindDepot, &tfdd);
+ NewTrainPathfind(v->tile, 0, v->u.rail.compatible_railtypes, i, (NTPEnumProc*)NtpCallbFindDepot, &tfdd);
}
} break;
}
@@ -2401,6 +2406,54 @@ static void ClearPathReservation(TileIndex tile, Trackdir track_dir)
}
}
+/** Free the reserved path in front of a vehicle. */
+void FreeTrainTrackReservation(const Vehicle *v, TileIndex origin, Trackdir orig_td)
+{
+ assert(IsFrontEngine(v));
+
+ TileIndex tile = origin != INVALID_TILE ? origin : v->tile;
+ Trackdir td = orig_td != INVALID_TRACKDIR ? orig_td : GetVehicleTrackdir(v);
+ bool free_tile = tile != v->tile || !(IsRailwayStationTile(v->tile) || IsTileType(v->tile, MP_TUNNELBRIDGE));
+
+ /* Don't free reservation if it's not ours. */
+ if (TracksOverlap(GetReservedTrackbits(tile) | TrackToTrackBits(TrackdirToTrack(td)))) return;
+
+ CFollowTrackRail ft(v, GetRailTypeInfo(v->u.rail.railtype)->compatible_railtypes);
+ while (ft.Follow(tile, td)) {
+ tile = ft.m_new_tile;
+ TrackdirBits bits = (TrackdirBits)(ft.m_new_td_bits & (GetReservedTrackbits(tile) * 0x101));
+ td = RemoveFirstTrackdir(&bits);
+ assert(bits == TRACKDIR_BIT_NONE);
+
+ if (!IsValidTrackdir(td)) break;
+
+ if (IsTileType(tile, MP_RAILWAY)) {
+ if (HasSignalOnTrackdir(tile, td) && !IsPbsSignal(GetSignalType(tile, TrackdirToTrack(td)))) {
+ /* Conventional signal along trackdir: remove reservation and stop. */
+ UnreserveRailTrack(tile, TrackdirToTrack(td));
+ break;
+ }
+ if (HasPbsSignalOnTrackdir(tile, td)) {
+ if (GetSignalStateByTrackdir(tile, td) == SIGNAL_STATE_RED) {
+ /* Red PBS signal? Can't be our reservation, would be green then. */
+ break;
+ } else {
+ /* Turn the signal back to red. */
+ SetSignalStateByTrackdir(tile, td, SIGNAL_STATE_RED);
+ MarkTileDirtyByTile(tile);
+ }
+ } else if (HasSignalOnTrackdir(tile, ReverseTrackdir(td)) && IsOnewaySignal(tile, TrackdirToTrack(td))) {
+ break;
+ }
+ }
+
+ /* Don't free first station/bridge/tunnel if we are on it. */
+ if (free_tile || (!ft.m_is_station && !ft.m_is_tunnel && !ft.m_is_bridge)) ClearPathReservation(tile, td);
+
+ free_tile = true;
+ }
+}
+
/** Check for station tiles */
struct TrainTrackFollowerData {
TileIndex dest_coords;
@@ -2466,25 +2519,34 @@ static const byte _search_directions[6][4] = {
static const byte _pick_track_table[6] = {1, 3, 2, 2, 0, 0};
-/* choose a track */
-static Track ChooseTrainTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks)
+/**
+ * Perform pathfinding for a train.
+ *
+ * @param v The train
+ * @param tile The tile the train is about to enter
+ * @param enterdir Diagonal direction the train is coming from
+ * @param tracks Usable tracks on the new tile
+ * @param path_not_found [out] Set to false if the pathfinder couldn't find a way to the destination
+ * @param do_track_reservation
+ * @param dest [out]
+ * @return The best track the train should follow
+ */
+static Track DoTrainPathfind(Vehicle* v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool *path_not_found, bool do_track_reservation, PBSTileInfo *dest)
{
Track best_track;
- /* pathfinders are able to tell that route was only 'guessed' */
- bool path_not_found = false;
#ifdef PF_BENCHMARK
TIC()
#endif
- assert((tracks & ~TRACK_BIT_MASK) == 0);
+ if (path_not_found) *path_not_found = false;
- /* quick return in case only one possible track is available */
- if (KillFirstBit(tracks) == TRACK_BIT_NONE) return FindFirstTrack(tracks);
+ uint8 pathfinder = _settings_game.pf.pathfinder_for_trains;
+ if (do_track_reservation && pathfinder == VPF_NTP) pathfinder = VPF_NPF;
- switch (_settings_game.pf.pathfinder_for_trains) {
+ switch (pathfinder) {
case VPF_YAPF: { /* YAPF */
- Trackdir trackdir = YapfChooseRailTrack(v, tile, enterdir, tracks, &path_not_found);
+ Trackdir trackdir = YapfChooseRailTrack(v, tile, enterdir, tracks, path_not_found, do_track_reservation, dest);
if (trackdir != INVALID_TRACKDIR) {
best_track = TrackdirToTrack(trackdir);
} else {
@@ -2496,12 +2558,18 @@ static Track ChooseTrainTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir
void *perf = NpfBeginInterval();
NPFFindStationOrTileData fstd;
- NPFFillWithOrderData(&fstd, v);
- /* The enterdir for the new tile, is the exitdir for the old tile */
- Trackdir trackdir = GetVehicleTrackdir(v);
- assert(trackdir != INVALID_TRACKDIR);
+ NPFFillWithOrderData(&fstd, v, do_track_reservation);
- NPFFoundTargetData ftd = NPFRouteToStationOrTile(tile - TileOffsByDiagDir(enterdir), trackdir, true, &fstd, TRANSPORT_RAIL, 0, v->owner, v->u.rail.compatible_railtypes);
+ PBSTileInfo origin = FollowTrainReservation(v);
+ assert(IsValidTrackdir(origin.trackdir));
+
+ NPFFoundTargetData ftd = NPFRouteToStationOrTile(origin.tile, origin.trackdir, true, &fstd, TRANSPORT_RAIL, 0, v->owner, v->u.rail.compatible_railtypes);
+
+ if (dest != NULL) {
+ dest->tile = ftd.node.tile;
+ dest->trackdir = (Trackdir)ftd.node.direction;
+ dest->okay = ftd.res_okay;
+ }
if (ftd.best_trackdir == INVALID_TRACKDIR) {
/* We are already at our target. Just do something
@@ -2513,7 +2581,7 @@ static Track ChooseTrainTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir
* the direction we need to take to get there, if ftd.best_bird_dist is not 0,
* we did not find our target, but ftd.best_trackdir contains the direction leading
* to the tile closest to our target. */
- if (ftd.best_bird_dist != 0) path_not_found = true;
+ if (ftd.best_bird_dist != 0 && path_not_found != NULL) *path_not_found = true;
/* Discard enterdir information, making it a normal track */
best_track = TrackdirToTrack(ftd.best_trackdir);
}
@@ -2538,7 +2606,7 @@ static Track ChooseTrainTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir
v->u.rail.compatible_railtypes, enterdir, (NTPEnumProc*)NtpCallbFindStation, &fd);
/* check whether the path was found or only 'guessed' */
- if (fd.best_bird_dist != 0) path_not_found = true;
+ if (fd.best_bird_dist != 0 && path_not_found != NULL) *path_not_found = true;
if (fd.best_track == INVALID_TRACKDIR) {
/* blaha */
@@ -2552,6 +2620,71 @@ static Track ChooseTrainTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir
} break;
}
+#ifdef PF_BENCHMARK
+ TOC("PF time = ", 1)
+#endif
+
+ return best_track;
+}
+
+/**
+ * Try to reserve any path to a safe tile, ignoring the vehicle's destination.
+ * Safe tiles are tiles in front of a signal, depots and station tiles at end of line.
+ *
+ * @param v The vehicle.
+ * @param tile The tile the search should start from.
+ * @param td The trackdir the search should start from.
+ * @param override_tailtype Whether all physically compatible railtypes should be followed.
+ * @return True if a path to a safe stopping tile could be reserved.
+ */
+static bool TryReserveSafeTrack(const Vehicle* v, TileIndex tile, Trackdir td, bool override_tailtype)
+{
+ if (_settings_game.pf.pathfinder_for_trains == VPF_YAPF) {
+ return YapfRailFindNearestSafeTile(v, tile, td, override_tailtype);
+ } else {
+ return NPFRouteToSafeTile(v, tile, td, override_tailtype).res_okay;
+ }
+}
+
+/* choose a track */
+static Track ChooseTrainTrack(Vehicle* v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool force_res, bool *got_reservation, bool mark_stuck)
+{
+ Track best_track = INVALID_TRACK;
+ /* pathfinders are able to tell that route was only 'guessed' */
+ bool path_not_found = false;
+ bool do_track_reservation = _settings_game.pf.reserve_paths || force_res;
+ bool changed_signal = false;
+
+ assert((tracks & ~TRACK_BIT_MASK) == 0);
+
+ if (got_reservation != NULL) *got_reservation = false;
+
+ /* Don't use tracks here as the setting to forbid 90 deg turns might have been switched between reservation and now. */
+ TrackBits res_tracks = (TrackBits)(GetReservedTrackbits(tile) & DiagdirReachesTracks(enterdir));
+ /* Do we have a suitable reserved track? */
+ if (res_tracks != TRACK_BIT_NONE) return FindFirstTrack(res_tracks);
+
+ /* Quick return in case only one possible track is available */
+ if (KillFirstBit(tracks) == TRACK_BIT_NONE) {
+ Track track = FindFirstTrack(tracks);
+ /* We need to check for signals only here, as a junction tile can't have signals. */
+ if (track != INVALID_TRACK && HasPbsSignalOnTrackdir(tile, TrackEnterdirToTrackdir(track, enterdir))) {
+ do_track_reservation = true;
+ changed_signal = true;
+ SetSignalStateByTrackdir(tile, TrackEnterdirToTrackdir(track, enterdir), SIGNAL_STATE_GREEN);
+ } else if (!do_track_reservation) {
+ return track;
+ }
+ best_track = track;
+ }
+
+ if (do_track_reservation) {
+ if (v->current_order.IsType(OT_DUMMY) || v->current_order.IsType(OT_CONDITIONAL)) ProcessOrders(v);
+ }
+
+ PBSTileInfo res_dest;
+ best_track = DoTrainPathfind(v, tile, enterdir, tracks, &path_not_found, do_track_reservation, &res_dest);
+
/* handle "path not found" state */
if (path_not_found) {
/* PF didn't find the route */
@@ -2577,9 +2710,38 @@ static Track ChooseTrainTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir
}
}
-#ifdef PF_BENCHMARK
- TOC("PF time = ", 1)
-#endif
+ /* No track reservation requested -> finished. */
+ if (!do_track_reservation) return best_track;
+
+ /* A path was found, but could not be reserved. */
+ if (res_dest.tile != INVALID_TILE && !res_dest.okay) {
+ if (mark_stuck) MarkTrainAsStuck(v);
+ FreeTrainTrackReservation(v);
+ return best_track;
+ }
+
+ /* No possible reservation target found, we are probably lost. */
+ if (res_dest.tile == INVALID_TILE) {
+ /* Try to find any safe destination. */
+ PBSTileInfo origin = FollowTrainReservation(v);
+ if (TryReserveSafeTrack(v, origin.tile, origin.trackdir, false)) {
+ TrackBits res = GetReservedTrackbits(tile) & DiagdirReachesTracks(enterdir);
+ best_track = FindFirstTrack(res);
+ TryReserveRailTrack(v->tile, TrackdirToTrack(GetVehicleTrackdir(v)));
+ if (got_reservation != NULL) *got_reservation = true;
+ if (changed_signal) MarkTileDirtyByTile(tile);
+ } else {
+ FreeTrainTrackReservation(v);
+ if (mark_stuck) MarkTrainAsStuck(v);
+ }
+ return best_track;
+ }
+
+ if (got_reservation != NULL) *got_reservation = true;
+
+ TryReserveRailTrack(v->tile, TrackdirToTrack(GetVehicleTrackdir(v)));
+
+ if (changed_signal) MarkTileDirtyByTile(tile);
return best_track;
}
@@ -3104,8 +3266,8 @@ static void TrainController(Vehicle *v, Vehicle *nomove, bool update_image)
if (prev == NULL) {
/* Currently the locomotive is active. Determine which one of the
* available tracks to choose */
- chosen_track = TrackToTrackBits(ChooseTrainTrack(v, gp.new_tile, enterdir, bits));
- assert(chosen_track & bits);
+ chosen_track = TrackToTrackBits(ChooseTrainTrack(v, gp.new_tile, enterdir, bits, false, NULL, true));
+ assert(chosen_track & (bits | GetReservedTrackbits(gp.new_tile)));
/* Check if it's a red signal and that force proceed is not clicked. */
if (red_signals & chosen_track && v->u.rail.force_proceed == 0) {
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-23 00:01:38 +0000