diff options
Diffstat (limited to 'src/yapf')
| -rw-r--r-- | src/yapf/follow_track.hpp | 72 |
1 files changed, 67 insertions, 5 deletions
diff --git a/src/yapf/follow_track.hpp b/src/yapf/follow_track.hpp index d4cd455b5..cf7d98671 100644 --- a/src/yapf/follow_track.hpp +++ b/src/yapf/follow_track.hpp @@ -37,9 +37,26 @@ struct CFollowTrackT : public FollowTrack_t FORCEINLINE static TransportType TT() {return Ttr_type_;} FORCEINLINE static bool IsWaterTT() {return TT() == TRANSPORT_WATER;} FORCEINLINE static bool IsRailTT() {return TT() == TRANSPORT_RAIL;} + FORCEINLINE bool IsTram() {return IsRoadTT() && HasBit(m_veh->u.road.compatible_roadtypes, ROADTYPE_TRAM);} FORCEINLINE static bool IsRoadTT() {return TT() == TRANSPORT_ROAD;} FORCEINLINE static bool Allow90degTurns() {return T90deg_turns_allowed_;} + /** Tests if a tile is a road tile with a single tramtrack (tram can reverse) */ + FORCEINLINE DiagDirection GetSingleTramBit(TileIndex tile) + { + if (IsTram() && IsTileType(tile, MP_ROAD) && GetRoadTileType(tile) == ROAD_TILE_NORMAL) { + RoadBits rb = GetRoadBits(tile, ROADTYPE_TRAM); + switch (rb) { + case ROAD_NW: return DIAGDIR_NW; + case ROAD_SW: return DIAGDIR_SW; + case ROAD_SE: return DIAGDIR_SE; + case ROAD_NE: return DIAGDIR_NE; + default: break; + } + } + return INVALID_DIAGDIR; + } + /** main follower routine. Fills all members and return true on success. * Otherwise returns false if track can't be followed. */ FORCEINLINE bool Follow(TileIndex old_tile, Trackdir old_td) @@ -47,9 +64,10 @@ struct CFollowTrackT : public FollowTrack_t m_old_tile = old_tile; m_old_td = old_td; m_err = EC_NONE; - assert((GetTileTrackStatus(m_old_tile, TT(), m_veh->u.road.compatible_roadtypes) & TrackdirToTrackdirBits(m_old_td)) != 0); + assert(((GetTileTrackStatus(m_old_tile, TT(), m_veh->u.road.compatible_roadtypes) & TrackdirToTrackdirBits(m_old_td)) != 0) || + (GetSingleTramBit(m_old_tile) != INVALID_DIAGDIR)); // Disable the assertion for single tram bits m_exitdir = TrackdirToExitdir(m_old_td); - if (EnteredDepot()) return true; + if (ForcedReverse()) return true; if (!CanExitOldTile()) return false; FollowTileExit(); if (!QueryNewTileTrackStatus()) return TryReverse(); @@ -117,6 +135,24 @@ protected: } else { uint32 ts = GetTileTrackStatus(m_new_tile, TT(), m_veh->u.road.compatible_roadtypes); m_new_td_bits = (TrackdirBits)(ts & TRACKDIR_BIT_MASK); + + if (m_new_td_bits == 0) { + /* GetTileTrackStatus() returns 0 for single tram bits. + * As we cannot change it there (easily) without breaking something, change it here */ + switch (GetSingleTramBit(m_new_tile)) { + case DIAGDIR_NE: + case DIAGDIR_SW: + m_new_td_bits = TRACKDIR_BIT_X_NE | TRACKDIR_BIT_X_SW; + break; + + case DIAGDIR_NW: + case DIAGDIR_SE: + m_new_td_bits = TRACKDIR_BIT_Y_NW | TRACKDIR_BIT_Y_SE; + break; + + default: break; + } + } } return (m_new_td_bits != TRACKDIR_BIT_NONE); } @@ -133,6 +169,13 @@ protected: } } + /* single tram bits can only be left in one direction */ + DiagDirection single_tram = GetSingleTramBit(m_old_tile); + if (single_tram != INVALID_DIAGDIR && single_tram != m_exitdir) { + m_err = EC_NO_WAY; + return false; + } + // road depots can be also left in one direction only if (IsRoadTT() && IsTileDepotType(m_old_tile, TT())) { DiagDirection exitdir = GetRoadDepotDirection(m_old_tile); @@ -156,6 +199,13 @@ protected: } } + /* single tram bits can only be entered from one direction */ + DiagDirection single_tram = GetSingleTramBit(m_new_tile); + if (single_tram != INVALID_DIAGDIR && single_tram != ReverseDiagDir(m_exitdir)) { + m_err = EC_NO_WAY; + return false; + } + // road and rail depots can also be entered from one direction only if (IsRoadTT() && IsTileDepotType(m_new_tile, TT())) { DiagDirection exitdir = GetRoadDepotDirection(m_new_tile); @@ -232,8 +282,8 @@ protected: return true; } - /** return true if we entered depot and reversed inside */ - FORCEINLINE bool EnteredDepot() + /** return true if we must reverse (in depots and single tram bits) */ + FORCEINLINE bool ForcedReverse() { // rail and road depots cause reversing if (!IsWaterTT() && IsTileDepotType(m_old_tile, TT())) { @@ -248,13 +298,25 @@ protected: return true; } } + + // single tram bits cause reversing + if (GetSingleTramBit(m_old_tile) == ReverseDiagDir(m_exitdir)) { + // reverse + m_new_tile = m_old_tile; + m_new_td_bits = TrackdirToTrackdirBits(ReverseTrackdir(m_old_td)); + m_exitdir = ReverseDiagDir(m_exitdir); + m_tiles_skipped = 0; + m_is_tunnel = m_is_bridge = m_is_station = false; + return true; + } + return false; } /** return true if we successfully reversed at end of road/track */ FORCEINLINE bool TryReverse() { - if (IsRoadTT()) { + if (IsRoadTT() && !IsTram()) { // if we reached the end of road, we can reverse the RV and continue moving m_exitdir = ReverseDiagDir(m_exitdir); // new tile will be the same as old one |