From cbe00ec651b05d3cbf30f3c8389f8a4acc5ed204 Mon Sep 17 00:00:00 2001 From: glx22 Date: Tue, 5 Oct 2021 17:58:19 +0200 Subject: Fix: Try all possible reverse directions when a ship reaches a dead end --- src/pathfinder/npf/npf.cpp | 18 ++++++++++++++++-- src/pathfinder/npf/npf_func.h | 3 ++- src/pathfinder/yapf/yapf.h | 3 ++- src/pathfinder/yapf/yapf_ship.cpp | 19 ++++++++++++------- src/ship_cmd.cpp | 21 +++++++++++++++++---- 5 files changed, 49 insertions(+), 15 deletions(-) diff --git a/src/pathfinder/npf/npf.cpp b/src/pathfinder/npf/npf.cpp index 3bc596e63..f7cb1a5cd 100644 --- a/src/pathfinder/npf/npf.cpp +++ b/src/pathfinder/npf/npf.cpp @@ -1211,7 +1211,7 @@ Track NPFShipChooseTrack(const Ship *v, bool &path_found) 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); } diff --git a/src/pathfinder/npf/npf_func.h b/src/pathfinder/npf/npf_func.h index 036caf9bb..9183f76ed 100644 --- a/src/pathfinder/npf/npf_func.h +++ b/src/pathfinder/npf/npf_func.h @@ -46,9 +46,10 @@ Track NPFShipChooseTrack(const Ship *v, bool &path_found); /** * 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 diff --git a/src/pathfinder/yapf/yapf.h b/src/pathfinder/yapf/yapf.h index af5e966e7..d64466980 100644 --- a/src/pathfinder/yapf/yapf.h +++ b/src/pathfinder/yapf/yapf.h @@ -31,9 +31,10 @@ Track YapfShipChooseTrack(const Ship *v, TileIndex tile, DiagDirection enterdir, /** * 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. diff --git a/src/pathfinder/yapf/yapf_ship.cpp b/src/pathfinder/yapf/yapf_ship.cpp index 3a54ddb3e..25a63ec66 100644 --- a/src/pathfinder/yapf/yapf_ship.cpp +++ b/src/pathfinder/yapf/yapf_ship.cpp @@ -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, TileIndex tile, DiagDirection enterdir, 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; } diff --git a/src/ship_cmd.cpp b/src/ship_cmd.cpp index 0d8cd6c37..7f9dab0f1 100644 --- a/src/ship_cmd.cpp +++ b/src/ship_cmd.cpp @@ -335,13 +335,13 @@ static Vehicle *EnsureNoMovingShipProc(Vehicle *v, void *data) 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; -- cgit v1.2.3-70-g09d2