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Use a flags parameter for ChooseTrainTrack mode

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This commit is contained in:
Jonathan G Rennison 2021-03-31 21:42:36 +01:00
parent 5c569b1880
commit 49676552bb
1 changed files with 20 additions and 11 deletions
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31
src/train_cmd.cpp
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@ -65,8 +65,16 @@ struct ChooseTrainTrackLookAheadState {
DestinationID reverse_dest = 0; ///< Reverse station ID when CTTLASF_REVERSE_FOUND is set
};
/** Flags for ChooseTrainTrack */
enum ChooseTrainTrackFlags {
CTTF_NONE = 0, ///< No flags
CTTF_FORCE_RES = 0x01, ///< Force a reservation to be made
CTTF_MARK_STUCK = 0x02, ///< The train has to be marked as stuck when needed
};
DECLARE_ENUM_AS_BIT_SET(ChooseTrainTrackFlags)
static void TryLongReserveChooseTrainTrackFromReservationEnd(Train *v, bool no_reserve_vehicle_tile = false);
static Track ChooseTrainTrack(Train *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool force_res, bool *p_got_reservation, bool mark_stuck, ChooseTrainTrackLookAheadState lookahead_state = {});
static Track ChooseTrainTrack(Train *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, ChooseTrainTrackFlags flags, bool *p_got_reservation, ChooseTrainTrackLookAheadState lookahead_state = {});
static bool TrainApproachingLineEnd(Train *v, bool signal, bool reverse);
static bool TrainCheckIfLineEnds(Train *v, bool reverse = true);
static bool TrainCanLeaveTile(const Train *v);
@ -3078,7 +3086,7 @@ static void CheckNextTrainTile(Train *v)
if (ft.m_tiles_skipped == 0 && Rail90DegTurnDisallowedTilesFromTrackdir(ft.m_old_tile, ft.m_new_tile, ft.m_old_td)) {
tracks &= ~TrackCrossesTracks(TrackdirToTrack(ft.m_old_td));
}
ChooseTrainTrack(v, ft.m_new_tile, ft.m_exitdir, tracks, false, nullptr, false);
ChooseTrainTrack(v, ft.m_new_tile, ft.m_exitdir, tracks, CTTF_NONE, nullptr);
}
}
} else if (v->lookahead != nullptr && v->lookahead->reservation_end_tile == ft.m_new_tile && IsTileType(ft.m_new_tile, MP_TUNNELBRIDGE) && IsTunnelBridgeSignalSimulationEntrance(ft.m_new_tile) &&
@ -3891,7 +3899,7 @@ static void TryLongReserveChooseTrainTrack(Train *v, TileIndex tile, Trackdir td
}
SetTunnelBridgeExitSignalState(exit_tile, SIGNAL_STATE_GREEN);
ChooseTrainTrack(v, ft.m_new_tile, ft.m_exitdir, TrackdirBitsToTrackBits(ft.m_new_td_bits), force_res, nullptr, false, lookahead_state);
ChooseTrainTrack(v, ft.m_new_tile, ft.m_exitdir, TrackdirBitsToTrackBits(ft.m_new_td_bits), force_res ? CTTF_FORCE_RES : CTTF_NONE, nullptr, lookahead_state);
if (reserved_bits == GetReservedTrackbits(ft.m_new_tile)) {
/* next tile is still not reserved, so unreserve exit and restore signal state */
@ -3912,7 +3920,7 @@ static void TryLongReserveChooseTrainTrack(Train *v, TileIndex tile, Trackdir td
CFollowTrackRail ft(v);
if (ft.Follow(tile, td) && HasLongReservePbsSignalOnTrackdir(v, ft.m_new_tile, FindFirstTrackdir(ft.m_new_td_bits), !long_enough)) {
// We reserved up to a LR signal, reserve past it as well. recursion
ChooseTrainTrack(v, ft.m_new_tile, ft.m_exitdir, TrackdirBitsToTrackBits(ft.m_new_td_bits), force_res, nullptr, false, lookahead_state);
ChooseTrainTrack(v, ft.m_new_tile, ft.m_exitdir, TrackdirBitsToTrackBits(ft.m_new_td_bits), force_res ? CTTF_FORCE_RES : CTTF_NONE, nullptr, lookahead_state);
}
}
@ -3942,15 +3950,14 @@ static void TryLongReserveChooseTrainTrackFromReservationEnd(Train *v, bool no_r
* @param tile The tile from which to start
* @param enterdir
* @param tracks
* @param force_res Force a reservation to be made
* @param flags ChooseTrainTrackFlags flags
* @param got_reservation [out] If the train has a reservation
* @param mark_stuck The train has to be marked as stuck when needed
* @return The track the train should take.
*/
static Track ChooseTrainTrack(Train *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool force_res, bool *p_got_reservation, bool mark_stuck, ChooseTrainTrackLookAheadState lookahead_state)
static Track ChooseTrainTrack(Train *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, ChooseTrainTrackFlags flags, bool *p_got_reservation, ChooseTrainTrackLookAheadState lookahead_state)
{
Track best_track = INVALID_TRACK;
bool do_track_reservation = _settings_game.pf.reserve_paths || force_res;
bool do_track_reservation = _settings_game.pf.reserve_paths || (flags & CTTF_FORCE_RES);
Trackdir changed_signal = INVALID_TRACKDIR;
assert((tracks & ~TRACK_BIT_MASK) == 0);
@ -3963,6 +3970,8 @@ static Track ChooseTrainTrack(Train *v, TileIndex tile, DiagDirection enterdir,
/* Do we have a suitable reserved track? */
if (res_tracks != TRACK_BIT_NONE) return FindFirstTrack(res_tracks);
bool mark_stuck = (flags & CTTF_MARK_STUCK);
/* Quick return in case only one possible track is available */
if (KillFirstBit(tracks) == TRACK_BIT_NONE) {
Track track = FindFirstTrack(tracks);
@ -4147,7 +4156,7 @@ static Track ChooseTrainTrack(Train *v, TileIndex tile, DiagDirection enterdir,
FillTrainReservationLookAhead(v);
if (v->lookahead != nullptr) lookahead_state.order_items_start = (uint)v->lookahead->items.size();
}
TryLongReserveChooseTrainTrack(v, res_dest.tile, res_dest.trackdir, force_res, lookahead_state);
TryLongReserveChooseTrainTrack(v, res_dest.tile, res_dest.trackdir, (flags & CTTF_FORCE_RES), lookahead_state);
}
if (!HasBit(lookahead_state.flags, CTTLASF_NO_RES_VEH_TILE)) TryReserveRailTrack(v->tile, TrackdirToTrack(v->GetVehicleTrackdir()));
@ -4261,7 +4270,7 @@ bool TryPathReserve(Train *v, bool mark_as_stuck, bool first_tile_okay)
bool res_made = false;
if (reachable != TRACK_BIT_NONE) {
ChooseTrainTrack(v, new_tile, exitdir, reachable, true, &res_made, mark_as_stuck);
ChooseTrainTrack(v, new_tile, exitdir, reachable, CTTF_FORCE_RES | (mark_as_stuck ? CTTF_MARK_STUCK : CTTF_NONE), &res_made);
}
if (!res_made) {
@ -5071,7 +5080,7 @@ bool TrainController(Train *v, Vehicle *nomove, bool reverse)
if (prev == nullptr) {
/* Currently the locomotive is active. Determine which one of the
* available tracks to choose */
chosen_track = TrackToTrackBits(ChooseTrainTrack(v, gp.new_tile, enterdir, bits, false, nullptr, true));
chosen_track = TrackToTrackBits(ChooseTrainTrack(v, gp.new_tile, enterdir, bits, CTTF_MARK_STUCK, nullptr));
assert_msg_tile(chosen_track & (bits | GetReservedTrackbits(gp.new_tile)), gp.new_tile, "0x%X, 0x%X, 0x%X", chosen_track, bits, GetReservedTrackbits(gp.new_tile));
if (v->force_proceed != TFP_NONE && IsPlainRailTile(gp.new_tile) && HasSignals(gp.new_tile)) {