cpp/openttd-patchpack/source Changeset - r26015:62da647d3454

Changeset - r26015:62da647d3454

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glx22 - 3 years ago 2021-10-05 15:58:19
glx@openttd.org

Fix: Try all possible reverse directions when a ship reaches a dead end

5 files changed with 49 insertions and 15 deletions:

src/pathfinder/npf/npf.cpp

src/pathfinder/npf/npf_func.h

src/pathfinder/yapf/yapf.h

src/pathfinder/yapf/yapf_ship.cpp

src/ship_cmd.cpp

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src/pathfinder/npf/npf.cpp

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@@ @@ -1211,7 +1211,7 @@ Track NPFShipChooseTrack(const Ship *v, @@
 	return TrackdirToTrack(ftd.best_trackdir);
+}
 bool NPFShipCheckReverse(const Ship *v)
+bool NPFShipCheckReverse(const Ship *v, Trackdir *best_td)
+{
 	NPFFindStationOrTileData fstd;
 	NPFFoundTargetData ftd;
@@ @@ -1224,7 +1224,21 @@ bool NPFShipCheckReverse(const Ship *v) @@
 	assert(trackdir_rev != INVALID_TRACKDIR);
 	AyStarUserData user = { v->owner, TRANSPORT_WATER, RAILTYPES_NONE, ROADTYPES_NONE, 0 };
 	ftd = NPFRouteToStationOrTileTwoWay(v->tile, trackdir, false, v->tile, trackdir_rev, false, &fstd, &user);
 	if (best_td != nullptr) {
 		TrackdirBits rtds = DiagdirReachesTrackdirs(ReverseDiagDir(VehicleExitDir(v->direction, v->state)));
 		Trackdir best = (Trackdir)FindFirstBit2x64(rtds);
 		for (rtds = KillFirstBit(rtds); rtds != TRACKDIR_BIT_NONE; rtds = KillFirstBit(rtds)) {
 			Trackdir td = (Trackdir)FindFirstBit2x64(rtds);
 			ftd = NPFRouteToStationOrTileTwoWay(v->tile, best, false, v->tile, td, false, &fstd, &user);
 			if (ftd.best_bird_dist == 0 && NPFGetFlag(&ftd.node, NPF_FLAG_REVERSE)) best = td;
+		}
 		if (ftd.best_bird_dist == 0) {
 			*best_td = best;
 			return true;
+		}
 	} else {
 		ftd = NPFRouteToStationOrTileTwoWay(v->tile, trackdir, false, v->tile, trackdir_rev, false, &fstd, &user);
+	}
 	/* If we didn't find anything, just keep on going straight ahead, otherwise take the reverse flag */
 	return ftd.best_bird_dist == 0 && NPFGetFlag(&ftd.node, NPF_FLAG_REVERSE);
+}

src/pathfinder/npf/npf_func.h

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@@ @@ -46,9 +46,10 @@ Track NPFShipChooseTrack(const Ship *v, @@
 /**
  * Returns true if it is better to reverse the ship before leaving depot using NPF.
  * @param v the ship leaving the depot
  * @param trackdir [out] the best of all possible reversed trackdirs
  * @return true if reversing is better
  */
 bool NPFShipCheckReverse(const Ship *v);
+bool NPFShipCheckReverse(const Ship *v, Trackdir *trackdir);
 /**
  * Used when user sends train to the nearest depot or if train needs servicing using NPF

src/pathfinder/yapf/yapf.h

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@@ @@ -31,9 +31,10 @@ Track YapfShipChooseTrack(const Ship *v, @@
 /**
  * Returns true if it is better to reverse the ship before leaving depot using YAPF.
  * @param v the ship leaving the depot
  * @param trackdir [out] the best of all possible reversed trackdirs
  * @return true if reversing is better
  */
 bool YapfShipCheckReverse(const Ship *v);
+bool YapfShipCheckReverse(const Ship *v, Trackdir *trackdir);
 /**
  * Finds the best path for given road vehicle using YAPF.

src/pathfinder/yapf/yapf_ship.cpp

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@@ @@ -204,14 +204,15 @@ public: @@
 	 * @param tile Current position
 	 * @param td1 Forward direction
 	 * @param td2 Reverse direction
 	 * @param trackdir [out] the best of all possible reversed trackdirs
 	 * @return true if the reverse direction is better
 	 */
 	static bool CheckShipReverse(const Ship *v, TileIndex tile, Trackdir td1, Trackdir td2)
+	static bool CheckShipReverse(const Ship *v, TileIndex tile, Trackdir td1, Trackdir td2, Trackdir *trackdir)
+	{
 		/* create pathfinder instance */
 		Tpf pf;
 		/* set origin and destination nodes */
 		pf.SetOrigin(tile, TrackdirToTrackdirBits(td1) | TrackdirToTrackdirBits(td2));
+		pf.SetOrigin(tile, trackdir == nullptr ? TrackdirToTrackdirBits(td1) | TrackdirToTrackdirBits(td2) : DiagdirReachesTrackdirs(ReverseDiagDir(VehicleExitDir(v->direction, v->state))));
 		pf.SetDestination(v);
 		/* find best path */
 		if (!pf.FindPath(v)) return false;
@@ @@ -226,8 +227,12 @@ public: @@
+		}
 		Trackdir best_trackdir = pNode->GetTrackdir();
 		assert(best_trackdir == td1 || best_trackdir == td2);
 		return best_trackdir == td2;
 		if (trackdir != nullptr) {
 			*trackdir = best_trackdir;
 		} else {
 			assert(best_trackdir == td1 || best_trackdir == td2);
+		}
 		return best_trackdir != td1;
+	}
 };
@@ @@ -353,13 +358,13 @@ Track YapfShipChooseTrack(const Ship *v, @@
 	return (td_ret != INVALID_TRACKDIR) ? TrackdirToTrack(td_ret) : INVALID_TRACK;
+}
 bool YapfShipCheckReverse(const Ship *v)
+bool YapfShipCheckReverse(const Ship *v, Trackdir *trackdir)
+{
 	Trackdir td = v->GetVehicleTrackdir();
 	Trackdir td_rev = ReverseTrackdir(td);
 	TileIndex tile = v->tile;
 	typedef bool (*PfnCheckReverseShip)(const Ship*, TileIndex, Trackdir, Trackdir);
+	typedef bool (*PfnCheckReverseShip)(const Ship*, TileIndex, Trackdir, Trackdir, Trackdir*);
 	PfnCheckReverseShip pfnCheckReverseShip = CYapfShip2::CheckShipReverse; // default: ExitDir
 	/* check if non-default YAPF type needed */
@@ @@ -367,7 +372,7 @@ bool YapfShipCheckReverse(const Ship *v) @@
 		pfnCheckReverseShip = &CYapfShip1::CheckShipReverse; // Trackdir
+	}
 	bool reverse = pfnCheckReverseShip(v, tile, td, td_rev);
+	bool reverse = pfnCheckReverseShip(v, tile, td, td_rev, trackdir);
 	return reverse;
+}

src/ship_cmd.cpp

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@@ @@ -335,13 +335,13 @@ static Vehicle *EnsureNoMovingShipProc(V @@
 	return v->type == VEH_SHIP && (v->vehstatus & (VS_HIDDEN | VS_STOPPED)) == 0 ? v : nullptr;
+}
 static bool CheckReverseShip(const Ship *v)
+static bool CheckReverseShip(const Ship *v, Trackdir *trackdir = nullptr)
+{
 	/* Ask pathfinder for best direction */
 	bool reverse = false;
 	switch (_settings_game.pf.pathfinder_for_ships) {
 		case VPF_NPF: reverse = NPFShipCheckReverse(v); break;
 		case VPF_YAPF: reverse = YapfShipCheckReverse(v); break;
 		case VPF_NPF: reverse = NPFShipCheckReverse(v, trackdir); break;
 		case VPF_YAPF: reverse = YapfShipCheckReverse(v, trackdir); break;
 		default: NOT_REACHED();
+	}
 	return reverse;
@@ @@ -725,7 +725,19 @@ static void ShipController(Ship *v) @@
 			DiagDirection diagdir = DiagdirBetweenTiles(gp.old_tile, gp.new_tile);
 			assert(diagdir != INVALID_DIAGDIR);
 			tracks = GetAvailShipTracks(gp.new_tile, diagdir);
 			if (tracks == TRACK_BIT_NONE) goto reverse_direction;
 			if (tracks == TRACK_BIT_NONE) {
 				Trackdir trackdir = INVALID_TRACKDIR;
 				CheckReverseShip(v, &trackdir);
 				if (trackdir == INVALID_TRACKDIR) goto reverse_direction;
 				static const Direction _trackdir_to_direction[] = {
 					DIR_NE, DIR_SE, DIR_E, DIR_E, DIR_S, DIR_S, INVALID_DIR, INVALID_DIR,
 					DIR_SW, DIR_NW, DIR_W, DIR_W, DIR_N, DIR_N, INVALID_DIR, INVALID_DIR,
 				};
 				v->direction = _trackdir_to_direction[trackdir];
 				assert(v->direction != INVALID_DIR);
 				v->state = TrackdirBitsToTrackBits(TrackdirToTrackdirBits(trackdir));
 				goto direction_changed;
+			}
 			/* Choose a direction, and continue if we find one */
 			track = ChooseShipTrack(v, gp.new_tile, diagdir, tracks);
@@ @@ -796,6 +808,7 @@ getout: @@
 reverse_direction:
 	v->direction = ReverseDir(v->direction);
 direction_changed:
 	/* Remember our current location to avoid movement glitch */
 	v->rotation_x_pos = v->x_pos;
 	v->rotation_y_pos = v->y_pos;

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