Mercurial > hg > openttd
changeset 5999:943dea0ea975 draft
(svn r8712) -Codechange/cleanup: replace 'magic' constants with enums, use proper types instead of byte, uint etc., give variables more descriptive names and add some comments.
author | rubidium <rubidium@openttd.org> |
---|---|
date | Tue, 13 Feb 2007 20:57:02 +0000 |
parents | bec0f8d9440b |
children | 2f43f0d4d589 |
files | src/rail.h src/roadveh_cmd.cpp |
diffstat | 2 files changed, 83 insertions(+), 66 deletions(-) [+] |
line wrap: on
line diff
--- a/src/rail.h +++ b/src/rail.h @@ -106,7 +106,11 @@ /** These are a combination of tracks and directions. Values are 0-5 in one - * direction (corresponding to the Track enum) and 8-13 in the other direction. */ + * direction (corresponding to the Track enum) and 8-13 in the other direction. + * 6, 7, 14 and 15 are used to encode the reversing of road vehicles. Those + * reversing track dirs are not considered to be 'valid' except in a small + * corner in the road vehicle controller. + */ typedef enum Trackdirs { TRACKDIR_BEGIN = 0, TRACKDIR_X_NE = 0, @@ -115,14 +119,16 @@ TRACKDIR_LOWER_E = 3, TRACKDIR_LEFT_S = 4, TRACKDIR_RIGHT_S = 5, - /* Note the two missing values here. This enables trackdir -> track - * conversion by doing (trackdir & 7) */ + TRACKDIR_RVREV_NE = 6, + TRACKDIR_RVREV_SE = 7, TRACKDIR_X_SW = 8, TRACKDIR_Y_NW = 9, TRACKDIR_UPPER_W = 10, TRACKDIR_LOWER_W = 11, TRACKDIR_LEFT_N = 12, TRACKDIR_RIGHT_N = 13, + TRACKDIR_RVREV_SW = 14, + TRACKDIR_RVREV_NW = 15, TRACKDIR_END, INVALID_TRACKDIR = 0xFF, } Trackdir;
--- a/src/roadveh_cmd.cpp +++ b/src/roadveh_cmd.cpp @@ -53,17 +53,25 @@ 0, 0, 0, 8, 8, 8, 8 }; - -static const uint16 _road_veh_fp_ax_and[4] = { - 0x1009, 0x16, 0x520, 0x2A00 +/** 'Convert' the DiagDirection where a road vehicle enters to the trackdirs it can drive onto */ +static const TrackdirBits _road_enter_dir_to_reachable_trackdirs[DIAGDIR_END] = { + TRACKDIR_BIT_LEFT_N | TRACKDIR_BIT_LOWER_E | TRACKDIR_BIT_X_NE, // Enter from north east + TRACKDIR_BIT_LEFT_S | TRACKDIR_BIT_UPPER_E | TRACKDIR_BIT_Y_SE, // Enter from south east + TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_X_SW | TRACKDIR_BIT_RIGHT_S, // Enter from south west + TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_LOWER_W | TRACKDIR_BIT_Y_NW // Enter from north west }; -static const byte _road_reverse_table[4] = { - 6, 7, 14, 15 +static const Trackdir _road_reverse_table[DIAGDIR_END] = { + TRACKDIR_RVREV_NE, TRACKDIR_RVREV_SE, TRACKDIR_RVREV_SW, TRACKDIR_RVREV_NW }; -static const uint16 _road_pf_table_3[4] = { - 0x910, 0x1600, 0x2005, 0x2A +/** 'Convert' the DiagDirection where a road vehicle should exit to + * the trackdirs it can use to drive to the exit direction*/ +static const TrackdirBits _road_exit_dir_to_incoming_trackdirs[DIAGDIR_END] = { + TRACKDIR_BIT_LOWER_W | TRACKDIR_BIT_X_SW | TRACKDIR_BIT_LEFT_S, + TRACKDIR_BIT_LEFT_N | TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_Y_NW, + TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_UPPER_E | TRACKDIR_BIT_X_NE, + TRACKDIR_BIT_RIGHT_S | TRACKDIR_BIT_LOWER_E | TRACKDIR_BIT_Y_SE }; int GetRoadVehImage(const Vehicle* v, Direction direction) @@ -1041,48 +1049,48 @@ return ret; } -// Returns direction to choose -// or -1 if the direction is currently blocked -static int RoadFindPathToDest(Vehicle* v, TileIndex tile, DiagDirection enterdir) +/** + * Returns direction to for a road vehicle to take or + * INVALID_TRACKDIR if the direction is currently blocked + * @param v the vehicle to do the pathfinding for + * @param tile the where to start the pathfinding + * @param enterdir the direction the vehicle enters the tile from + * @return the trackdir to take + */ +static Trackdir RoadFindPathToDest(Vehicle* v, TileIndex tile, DiagDirection enterdir) { -#define return_track(x) {best_track = x; goto found_best_track; } +#define return_track(x) { best_track = (Trackdir)x; goto found_best_track; } - uint16 signal; - uint bitmask; TileIndex desttile; FindRoadToChooseData frd; - int best_track; - uint best_dist, best_maxlen; - uint i; + Trackdir best_track; - { - uint32 r = GetTileTrackStatus(tile, TRANSPORT_ROAD); - signal = GB(r, 16, 16); - bitmask = GB(r, 0, 16); - } + uint32 r = GetTileTrackStatus(tile, TRANSPORT_ROAD); + TrackdirBits signal = (TrackdirBits)GB(r, 16, 16); + TrackdirBits trackdirs = (TrackdirBits)GB(r, 0, 16); if (IsTileType(tile, MP_STREET)) { if (GetRoadTileType(tile) == ROAD_TILE_DEPOT && (!IsTileOwner(tile, v->owner) || GetRoadDepotDirection(tile) == enterdir)) { /* Road depot owned by another player or with the wrong orientation */ - bitmask = 0; + trackdirs = TRACKDIR_BIT_NONE; } } else if (IsTileType(tile, MP_STATION) && IsRoadStopTile(tile)) { if (!IsTileOwner(tile, v->owner) || GetRoadStopDir(tile) == enterdir) { /* different station owner or wrong orientation */ - bitmask = 0; + trackdirs = TRACKDIR_BIT_NONE; } else { /* Our station */ RoadStop::Type rstype = (v->cargo_type == CT_PASSENGERS) ? RoadStop::BUS : RoadStop::TRUCK; if (GetRoadStopType(tile) != rstype) { - // wrong station type - bitmask = 0; + /* Wrong station type */ + trackdirs = TRACKDIR_BIT_NONE; } else { - // proper station type, check if there is free loading bay + /* Proper station type, check if there is free loading bay */ if (!_patches.roadveh_queue && !GetRoadStopByTile(tile, rstype)->HasFreeBay()) { - // station is full and RV queuing is off - bitmask = 0; + /* Station is full and RV queuing is off */ + trackdirs = TRACKDIR_BIT_NONE; } } } @@ -1092,9 +1100,9 @@ * stuff, probably even more arguments to GTTS. */ - /* remove unreachable tracks */ - bitmask &= _road_veh_fp_ax_and[enterdir]; - if (bitmask == 0) { + /* Remove tracks unreachable from the enter dir */ + trackdirs &= _road_enter_dir_to_reachable_trackdirs[enterdir]; + if (trackdirs == TRACKDIR_BIT_NONE) { /* No reachable tracks, so we'll reverse */ return_track(_road_reverse_table[enterdir]); } @@ -1109,19 +1117,19 @@ desttile = v->dest_tile; if (desttile == 0) { - // Pick a random track - return_track(PickRandomBit(bitmask)); + /* We've got no destination, pick a random track */ + return_track(PickRandomBit(trackdirs)); } - // Only one track to choose between? - if (!(KillFirstBit2x64(bitmask))) { - return_track(FindFirstBit2x64(bitmask)); + /* Only one track to choose between? */ + if (!(KillFirstBit2x64(trackdirs))) { + return_track(FindFirstBit2x64(trackdirs)); } if (_patches.yapf.road_use_yapf) { Trackdir trackdir = YapfChooseRoadTrack(v, tile, enterdir); if (trackdir != INVALID_TRACKDIR) return_track(trackdir); - return_track(PickRandomBit(bitmask)); + return_track(PickRandomBit(trackdirs)); } else if (_patches.new_pathfinding_all) { NPFFindStationOrTileData fstd; NPFFoundTargetData ftd; @@ -1132,11 +1140,11 @@ //debug("Finding path. Enterdir: %d, Trackdir: %d", enterdir, trackdir); ftd = PerfNPFRouteToStationOrTile(tile - TileOffsByDiagDir(enterdir), trackdir, &fstd, TRANSPORT_ROAD, v->owner, INVALID_RAILTYPE); - if (ftd.best_trackdir == 0xff) { + if (ftd.best_trackdir == INVALID_TRACKDIR) { /* We are already at our target. Just do something */ //TODO: maybe display error? //TODO: go straight ahead if possible? - return_track(FindFirstBit2x64(bitmask)); + return_track(FindFirstBit2x64(trackdirs)); } else { /* If ftd.best_bird_dist is 0, we found our target and ftd.best_trackdir contains the direction we need to take to get there, if ftd.best_bird_dist is not 0, @@ -1160,40 +1168,40 @@ * pretend we are heading for the tile in front, we'll * see from there */ desttile += TileOffsByDiagDir(dir); - if (desttile == tile && bitmask & _road_pf_table_3[dir]) { + if (desttile == tile && trackdirs & _road_exit_dir_to_incoming_trackdirs[dir]) { /* If we are already in front of the * station/depot and we can get in from here, * we enter */ - return_track(FindFirstBit2x64(bitmask & _road_pf_table_3[dir])); + return_track(FindFirstBit2x64(trackdirs & _road_exit_dir_to_incoming_trackdirs[dir])); } } } - // do pathfind + /* Do some pathfinding */ frd.dest = desttile; - best_track = -1; - best_dist = (uint)-1; - best_maxlen = (uint)-1; - i = 0; - do { - if (bitmask & 1) { - if (best_track == -1) best_track = i; // in case we don't find the path, just pick a track + best_track = INVALID_TRACKDIR; + uint best_dist = (uint)-1; + uint best_maxlen = (uint)-1; + uint bitmask = (uint)trackdirs; + for (int i = 0; bitmask != 0; bitmask >>= 1, i++) { + if (HASBIT(bitmask, i)) { + if (best_track == INVALID_TRACKDIR) best_track = (Trackdir)i; // in case we don't find the path, just pick a track frd.maxtracklen = (uint)-1; frd.mindist = (uint)-1; FollowTrack(tile, 0x2000 | TRANSPORT_ROAD, _road_pf_directions[i], EnumRoadTrackFindDist, NULL, &frd); - if (frd.mindist < best_dist || (frd.mindist==best_dist && frd.maxtracklen < best_maxlen)) { + if (frd.mindist < best_dist || (frd.mindist == best_dist && frd.maxtracklen < best_maxlen)) { best_dist = frd.mindist; best_maxlen = frd.maxtracklen; - best_track = i; + best_track = (Trackdir)i; } } - } while (++i,(bitmask>>=1) != 0); + } } found_best_track:; - if (HASBIT(signal, best_track)) return -1; + if (HASBIT(signal, best_track)) return INVALID_TRACKDIR; return best_track; } @@ -1208,7 +1216,7 @@ // use NPF NPFFindStationOrTileData fstd; Trackdir trackdir = GetVehicleTrackdir(v); - assert(trackdir != 0xFF); + assert(trackdir != INVALID_TRACKDIR); fstd.dest_coords = tile; fstd.station_index = INVALID_STATION; // indicates that the destination is a tile, not a station @@ -1234,7 +1242,10 @@ 15, 15, 11, 11 }; -static const byte _roadveh_data_2[4] = { 0, 1, 8, 9 }; +/** Converts the exit direction of a depot to trackdir the vehicle is going to drive to */ +static const Trackdir _roadveh_depot_exit_trackdir[DIAGDIR_END] = { + TRACKDIR_X_NE, TRACKDIR_Y_SE, TRACKDIR_X_SW, TRACKDIR_Y_NW +}; static void RoadVehController(Vehicle *v) { @@ -1276,15 +1287,15 @@ /* Vehicle is about to leave a depot */ DiagDirection dir; const RoadDriveEntry* rdp; - byte rd2; + Trackdir tdir; v->cur_speed = 0; dir = GetRoadDepotDirection(v->tile); v->direction = DiagDirToDir(dir); - rd2 = _roadveh_data_2[dir]; - rdp = _road_drive_data[(_opt.road_side << 4) + rd2]; + tdir = _roadveh_depot_exit_trackdir[dir]; + rdp = _road_drive_data[(_opt.road_side << 4) + tdir]; x = TileX(v->tile) * TILE_SIZE + (rdp[6].x & 0xF); y = TileY(v->tile) * TILE_SIZE + (rdp[6].y & 0xF); @@ -1298,7 +1309,7 @@ BeginVehicleMove(v); v->vehstatus &= ~VS_HIDDEN; - v->u.road.state = rd2; + v->u.road.state = tdir; v->u.road.frame = 6; v->cur_image = GetRoadVehImage(v, v->direction); @@ -1361,12 +1372,12 @@ if (rd.x & 0x80) { /* Vehicle is moving to the next tile */ TileIndex tile = v->tile + TileOffsByDiagDir(rd.x & 3); - int dir = RoadFindPathToDest(v, tile, (DiagDirection)(rd.x & 3)); + Trackdir dir = RoadFindPathToDest(v, tile, (DiagDirection)(rd.x & 3)); uint32 r; Direction newdir; const RoadDriveEntry *rdp; - if (dir == -1) { + if (dir == INVALID_TRACKDIR) { /* No path was found to destination */ v->cur_speed = 0; return; @@ -1435,13 +1446,13 @@ if (rd.x & 0x40) { /* Vehicle has finished turning around, it will now head back onto the same tile */ - int dir = RoadFindPathToDest(v, v->tile, (DiagDirection)(rd.x & 3)); + Trackdir dir = RoadFindPathToDest(v, v->tile, (DiagDirection)(rd.x & 3)); uint32 r; int tmp; Direction newdir; const RoadDriveEntry *rdp; - if (dir == -1) { + if (dir == INVALID_TRACKDIR) { /* No path was found to destination */ v->cur_speed = 0; return;