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00012 #include "ai_rail.hpp"
00013 #include "ai_map.hpp"
00014 #include "ai_station.hpp"
00015 #include "../../command_type.h"
00016 #include "../../debug.h"
00017 #include "../../station_base.h"
00018 #include "../../company_func.h"
00019 #include "../../newgrf.h"
00020 #include "../../newgrf_generic.h"
00021 #include "../../newgrf_station.h"
00022 #include "../../economy_func.h"
00023
00024 bool AIRail::IsRailTile(TileIndex tile)
00025 {
00026 if (!::IsValidTile(tile)) return false;
00027
00028 return (::IsTileType(tile, MP_RAILWAY) && !::IsRailDepot(tile)) ||
00029 (::HasStationTileRail(tile) && !::IsStationTileBlocked(tile)) || ::IsLevelCrossingTile(tile);
00030 }
00031
00032 bool AIRail::IsLevelCrossingTile(TileIndex tile)
00033 {
00034 if (!::IsValidTile(tile)) return false;
00035
00036 return ::IsLevelCrossingTile(tile);
00037 }
00038
00039 bool AIRail::IsRailDepotTile(TileIndex tile)
00040 {
00041 if (!::IsValidTile(tile)) return false;
00042
00043 return ::IsRailDepotTile(tile);
00044 }
00045
00046 bool AIRail::IsRailStationTile(TileIndex tile)
00047 {
00048 if (!::IsValidTile(tile)) return false;
00049
00050 return ::IsRailStationTile(tile);
00051 }
00052
00053 bool AIRail::IsRailWaypointTile(TileIndex tile)
00054 {
00055 if (!::IsValidTile(tile)) return false;
00056
00057 return ::IsRailWaypointTile(tile);
00058 }
00059
00060 bool AIRail::IsRailTypeAvailable(RailType rail_type)
00061 {
00062 if ((::RailType)rail_type < RAILTYPE_BEGIN || (::RailType)rail_type >= RAILTYPE_END) return false;
00063
00064 return ::HasRailtypeAvail(_current_company, (::RailType)rail_type);
00065 }
00066
00067 AIRail::RailType AIRail::GetCurrentRailType()
00068 {
00069 return (RailType)AIObject::GetRailType();
00070 }
00071
00072 void AIRail::SetCurrentRailType(RailType rail_type)
00073 {
00074 if (!IsRailTypeAvailable(rail_type)) return;
00075
00076 AIObject::SetRailType((::RailType)rail_type);
00077 }
00078
00079 bool AIRail::TrainCanRunOnRail(AIRail::RailType engine_rail_type, AIRail::RailType track_rail_type)
00080 {
00081 if (!AIRail::IsRailTypeAvailable(engine_rail_type)) return false;
00082 if (!AIRail::IsRailTypeAvailable(track_rail_type)) return false;
00083
00084 return ::IsCompatibleRail((::RailType)engine_rail_type, (::RailType)track_rail_type);
00085 }
00086
00087 bool AIRail::TrainHasPowerOnRail(AIRail::RailType engine_rail_type, AIRail::RailType track_rail_type)
00088 {\
00089 if (!AIRail::IsRailTypeAvailable(engine_rail_type)) return false;
00090 if (!AIRail::IsRailTypeAvailable(track_rail_type)) return false;
00091
00092 return ::HasPowerOnRail((::RailType)engine_rail_type, (::RailType)track_rail_type);
00093 }
00094
00095 AIRail::RailType AIRail::GetRailType(TileIndex tile)
00096 {
00097 if (!AITile::HasTransportType(tile, AITile::TRANSPORT_RAIL)) return RAILTYPE_INVALID;
00098
00099 return (RailType)::GetRailType(tile);
00100 }
00101
00102 bool AIRail::ConvertRailType(TileIndex start_tile, TileIndex end_tile, AIRail::RailType convert_to)
00103 {
00104 EnforcePrecondition(false, ::IsValidTile(start_tile));
00105 EnforcePrecondition(false, ::IsValidTile(end_tile));
00106 EnforcePrecondition(false, IsRailTypeAvailable(convert_to));
00107
00108 return AIObject::DoCommand(start_tile, end_tile, convert_to, CMD_CONVERT_RAIL);
00109 }
00110
00111 TileIndex AIRail::GetRailDepotFrontTile(TileIndex depot)
00112 {
00113 if (!IsRailDepotTile(depot)) return INVALID_TILE;
00114
00115 return depot + ::TileOffsByDiagDir(::GetRailDepotDirection(depot));
00116 }
00117
00118 AIRail::RailTrack AIRail::GetRailStationDirection(TileIndex tile)
00119 {
00120 if (!IsRailStationTile(tile)) return RAILTRACK_INVALID;
00121
00122 return (RailTrack)::GetRailStationTrackBits(tile);
00123 }
00124
00125 bool AIRail::BuildRailDepot(TileIndex tile, TileIndex front)
00126 {
00127 EnforcePrecondition(false, tile != front);
00128 EnforcePrecondition(false, ::IsValidTile(tile));
00129 EnforcePrecondition(false, ::IsValidTile(front));
00130 EnforcePrecondition(false, ::TileX(tile) == ::TileX(front) || ::TileY(tile) == ::TileY(front));
00131 EnforcePrecondition(false, IsRailTypeAvailable(GetCurrentRailType()));
00132
00133 uint entrance_dir = (::TileX(tile) == ::TileX(front)) ? (::TileY(tile) < ::TileY(front) ? 1 : 3) : (::TileX(tile) < ::TileX(front) ? 2 : 0);
00134
00135 return AIObject::DoCommand(tile, AIObject::GetRailType(), entrance_dir, CMD_BUILD_TRAIN_DEPOT);
00136 }
00137
00138 bool AIRail::BuildRailStation(TileIndex tile, RailTrack direction, uint num_platforms, uint platform_length, StationID station_id)
00139 {
00140 EnforcePrecondition(false, ::IsValidTile(tile));
00141 EnforcePrecondition(false, direction == RAILTRACK_NW_SE || direction == RAILTRACK_NE_SW);
00142 EnforcePrecondition(false, num_platforms > 0 && num_platforms <= 0xFF);
00143 EnforcePrecondition(false, platform_length > 0 && platform_length <= 0xFF);
00144 EnforcePrecondition(false, IsRailTypeAvailable(GetCurrentRailType()));
00145 EnforcePrecondition(false, station_id == AIStation::STATION_NEW || station_id == AIStation::STATION_JOIN_ADJACENT || AIStation::IsValidStation(station_id));
00146
00147 uint32 p1 = GetCurrentRailType() | (platform_length << 16) | (num_platforms << 8);
00148 if (direction == RAILTRACK_NW_SE) p1 |= (1 << 4);
00149 if (station_id != AIStation::STATION_JOIN_ADJACENT) p1 |= (1 << 24);
00150 return AIObject::DoCommand(tile, p1, (AIStation::IsValidStation(station_id) ? station_id : INVALID_STATION) << 16, CMD_BUILD_RAIL_STATION);
00151 }
00152
00153 bool AIRail::BuildNewGRFRailStation(TileIndex tile, RailTrack direction, uint num_platforms, uint platform_length, StationID station_id, CargoID cargo_id, IndustryType source_industry, IndustryType goal_industry, int distance, bool source_station)
00154 {
00155 EnforcePrecondition(false, ::IsValidTile(tile));
00156 EnforcePrecondition(false, direction == RAILTRACK_NW_SE || direction == RAILTRACK_NE_SW);
00157 EnforcePrecondition(false, num_platforms > 0 && num_platforms <= 0xFF);
00158 EnforcePrecondition(false, platform_length > 0 && platform_length <= 0xFF);
00159 EnforcePrecondition(false, IsRailTypeAvailable(GetCurrentRailType()));
00160 EnforcePrecondition(false, station_id == AIStation::STATION_NEW || station_id == AIStation::STATION_JOIN_ADJACENT || AIStation::IsValidStation(station_id));
00161
00162 uint32 p1 = GetCurrentRailType() | (platform_length << 16) | (num_platforms << 8);
00163 if (direction == RAILTRACK_NW_SE) p1 |= 1 << 4;
00164 if (station_id != AIStation::STATION_JOIN_ADJACENT) p1 |= (1 << 24);
00165
00166 const GRFFile *file;
00167 uint16 res = GetAiPurchaseCallbackResult(GSF_STATION, cargo_id, 0, source_industry, goal_industry, min(255, distance / 2), AICE_STATION_GET_STATION_ID, source_station ? 0 : 1, min(15, num_platforms) << 4 | min(15, platform_length), &file);
00168 uint32 p2 = (AIStation::IsValidStation(station_id) ? station_id : INVALID_STATION) << 16;
00169 if (res != CALLBACK_FAILED) {
00170 int index = 0;
00171 const StationSpec *spec = GetCustomStationSpecByGrf(file->grfid, res, &index);
00172 if (spec == NULL) {
00173 DEBUG(grf, 1, "%s returned an invalid station ID for 'AI construction/purchase selection (18)' callback", file->filename);
00174 } else {
00175 p2 |= spec->sclass | index << 8;
00176 }
00177
00178 }
00179 return AIObject::DoCommand(tile, p1, p2, CMD_BUILD_RAIL_STATION);
00180 }
00181
00182 bool AIRail::BuildRailWaypoint(TileIndex tile)
00183 {
00184 EnforcePrecondition(false, ::IsValidTile(tile));
00185 EnforcePrecondition(false, IsRailTile(tile));
00186 EnforcePrecondition(false, GetRailTracks(tile) == RAILTRACK_NE_SW || GetRailTracks(tile) == RAILTRACK_NW_SE);
00187 EnforcePrecondition(false, IsRailTypeAvailable(GetCurrentRailType()));
00188
00189 return AIObject::DoCommand(tile, GetCurrentRailType() | (GetRailTracks(tile) == RAILTRACK_NE_SW ? AXIS_X : AXIS_Y) << 4 | 1 << 8 | 1 << 16, STAT_CLASS_WAYP | INVALID_STATION << 16, CMD_BUILD_RAIL_WAYPOINT);
00190 }
00191
00192 bool AIRail::RemoveRailWaypointTileRectangle(TileIndex tile, TileIndex tile2, bool keep_rail)
00193 {
00194 EnforcePrecondition(false, ::IsValidTile(tile));
00195 EnforcePrecondition(false, ::IsValidTile(tile2));
00196
00197 return AIObject::DoCommand(tile, tile2, keep_rail ? 1 : 0, CMD_REMOVE_FROM_RAIL_WAYPOINT);
00198 }
00199
00200 bool AIRail::RemoveRailStationTileRectangle(TileIndex tile, TileIndex tile2, bool keep_rail)
00201 {
00202 EnforcePrecondition(false, ::IsValidTile(tile));
00203 EnforcePrecondition(false, ::IsValidTile(tile2));
00204
00205 return AIObject::DoCommand(tile, tile2, keep_rail ? 1 : 0, CMD_REMOVE_FROM_RAIL_STATION);
00206 }
00207
00208 uint AIRail::GetRailTracks(TileIndex tile)
00209 {
00210 if (!IsRailTile(tile)) return RAILTRACK_INVALID;
00211
00212 if (IsRailStationTile(tile) || IsRailWaypointTile(tile)) return ::TrackToTrackBits(::GetRailStationTrack(tile));
00213 if (IsLevelCrossingTile(tile)) return ::GetCrossingRailBits(tile);
00214 if (IsRailDepotTile(tile)) return ::TRACK_BIT_NONE;
00215 return ::GetTrackBits(tile);
00216 }
00217
00218 bool AIRail::BuildRailTrack(TileIndex tile, RailTrack rail_track)
00219 {
00220 EnforcePrecondition(false, ::IsValidTile(tile));
00221 EnforcePrecondition(false, rail_track != 0);
00222 EnforcePrecondition(false, (rail_track & ~::TRACK_BIT_ALL) == 0);
00223 EnforcePrecondition(false, KillFirstBit((uint)rail_track) == 0);
00224 EnforcePrecondition(false, IsRailTypeAvailable(GetCurrentRailType()));
00225
00226 return AIObject::DoCommand(tile, tile, GetCurrentRailType() | (FindFirstTrack((::TrackBits)rail_track) << 4), CMD_BUILD_RAILROAD_TRACK);
00227 }
00228
00229 bool AIRail::RemoveRailTrack(TileIndex tile, RailTrack rail_track)
00230 {
00231 EnforcePrecondition(false, ::IsValidTile(tile));
00232 EnforcePrecondition(false, ::IsPlainRailTile(tile) || ::IsLevelCrossingTile(tile));
00233 EnforcePrecondition(false, GetRailTracks(tile) & rail_track);
00234 EnforcePrecondition(false, KillFirstBit((uint)rail_track) == 0);
00235
00236 return AIObject::DoCommand(tile, tile, GetCurrentRailType() | (FindFirstTrack((::TrackBits)rail_track) << 4), CMD_REMOVE_RAILROAD_TRACK);
00237 }
00238
00239 bool AIRail::AreTilesConnected(TileIndex from, TileIndex tile, TileIndex to)
00240 {
00241 if (!IsRailTile(tile)) return false;
00242 if (from == to || AIMap::DistanceManhattan(from, tile) != 1 || AIMap::DistanceManhattan(tile, to) != 1) return false;
00243
00244 if (to < from) ::Swap(from, to);
00245
00246 if (tile - from == 1) {
00247 if (to - tile == 1) return (GetRailTracks(tile) & RAILTRACK_NE_SW) != 0;
00248 if (to - tile == ::MapSizeX()) return (GetRailTracks(tile) & RAILTRACK_NE_SE) != 0;
00249 } else if (tile - from == ::MapSizeX()) {
00250 if (tile - to == 1) return (GetRailTracks(tile) & RAILTRACK_NW_NE) != 0;
00251 if (to - tile == 1) return (GetRailTracks(tile) & RAILTRACK_NW_SW) != 0;
00252 if (to - tile == ::MapSizeX()) return (GetRailTracks(tile) & RAILTRACK_NW_SE) != 0;
00253 } else {
00254 return (GetRailTracks(tile) & RAILTRACK_SW_SE) != 0;
00255 }
00256
00257 NOT_REACHED();
00258 }
00259
00264 static uint32 SimulateDrag(TileIndex from, TileIndex tile, TileIndex *to)
00265 {
00266 int diag_offset = abs(abs((int)::TileX(*to) - (int)::TileX(tile)) - abs((int)::TileY(*to) - (int)::TileY(tile)));
00267 uint32 p2 = AIRail::GetCurrentRailType();
00268 if (::TileY(from) == ::TileY(*to)) {
00269 p2 |= (TRACK_X << 4);
00270 *to -= Clamp((int)::TileX(*to) - (int)::TileX(tile), -1, 1);
00271 } else if (::TileX(from) == ::TileX(*to)) {
00272 p2 |= (TRACK_Y << 4);
00273 *to -= ::MapSizeX() * Clamp((int)::TileY(*to) - (int)::TileY(tile), -1, 1);
00274 } else if (::TileY(from) < ::TileY(tile)) {
00275 if (::TileX(*to) < ::TileX(tile)) {
00276 p2 |= (TRACK_UPPER << 4);
00277 } else {
00278 p2 |= (TRACK_LEFT << 4);
00279 }
00280 if (diag_offset) {
00281 *to -= Clamp((int)::TileX(*to) - (int)::TileX(tile), -1, 1);
00282 } else {
00283 *to -= ::MapSizeX() * Clamp((int)::TileY(*to) - (int)::TileY(tile), -1, 1);
00284 }
00285 } else if (::TileY(from) > ::TileY(tile)) {
00286 if (::TileX(*to) < ::TileX(tile)) {
00287 p2 |= (TRACK_RIGHT << 4);
00288 } else {
00289 p2 |= (TRACK_LOWER << 4);
00290 }
00291 if (diag_offset) {
00292 *to -= Clamp((int)::TileX(*to) - (int)::TileX(tile), -1, 1);
00293 } else {
00294 *to -= ::MapSizeX() * Clamp((int)::TileY(*to) - (int)::TileY(tile), -1, 1);
00295 }
00296 } else if (::TileX(from) < ::TileX(tile)) {
00297 if (::TileY(*to) < ::TileY(tile)) {
00298 p2 |= (TRACK_UPPER << 4);
00299 } else {
00300 p2 |= (TRACK_RIGHT << 4);
00301 }
00302 if (!diag_offset) {
00303 *to -= Clamp((int)::TileX(*to) - (int)::TileX(tile), -1, 1);
00304 } else {
00305 *to -= ::MapSizeX() * Clamp((int)::TileY(*to) - (int)::TileY(tile), -1, 1);
00306 }
00307 } else if (::TileX(from) > ::TileX(tile)) {
00308 if (::TileY(*to) < ::TileY(tile)) {
00309 p2 |= (TRACK_LEFT << 4);
00310 } else {
00311 p2 |= (TRACK_LOWER << 4);
00312 }
00313 if (!diag_offset) {
00314 *to -= Clamp((int)::TileX(*to) - (int)::TileX(tile), -1, 1);
00315 } else {
00316 *to -= ::MapSizeX() * Clamp((int)::TileY(*to) - (int)::TileY(tile), -1, 1);
00317 }
00318 }
00319 return p2;
00320 }
00321
00322 bool AIRail::BuildRail(TileIndex from, TileIndex tile, TileIndex to)
00323 {
00324 EnforcePrecondition(false, ::IsValidTile(from));
00325 EnforcePrecondition(false, ::IsValidTile(tile));
00326 EnforcePrecondition(false, ::IsValidTile(to));
00327 EnforcePrecondition(false, ::DistanceManhattan(from, tile) == 1);
00328 EnforcePrecondition(false, ::DistanceManhattan(tile, to) >= 1);
00329 EnforcePrecondition(false, IsRailTypeAvailable(GetCurrentRailType()));
00330 int diag_offset = abs(abs((int)::TileX(to) - (int)::TileX(tile)) - abs((int)::TileY(to) - (int)::TileY(tile)));
00331 EnforcePrecondition(false, diag_offset <= 1 ||
00332 (::TileX(from) == ::TileX(tile) && ::TileX(tile) == ::TileX(to)) ||
00333 (::TileY(from) == ::TileY(tile) && ::TileY(tile) == ::TileY(to)));
00334
00335 uint32 p2 = SimulateDrag(from, tile, &to) | 1 << 8;
00336 return AIObject::DoCommand(tile, to, p2, CMD_BUILD_RAILROAD_TRACK);
00337 }
00338
00339 bool AIRail::RemoveRail(TileIndex from, TileIndex tile, TileIndex to)
00340 {
00341 EnforcePrecondition(false, ::IsValidTile(from));
00342 EnforcePrecondition(false, ::IsValidTile(tile));
00343 EnforcePrecondition(false, ::IsValidTile(to));
00344 EnforcePrecondition(false, ::DistanceManhattan(from, tile) == 1);
00345 EnforcePrecondition(false, ::DistanceManhattan(tile, to) >= 1);
00346 int diag_offset = abs(abs((int)::TileX(to) - (int)::TileX(tile)) - abs((int)::TileY(to) - (int)::TileY(tile)));
00347 EnforcePrecondition(false, diag_offset <= 1 ||
00348 (::TileX(from) == ::TileX(tile) && ::TileX(tile) == ::TileX(to)) ||
00349 (::TileY(from) == ::TileY(tile) && ::TileY(tile) == ::TileY(to)));
00350
00351 if (!IsRailTypeAvailable(GetCurrentRailType())) SetCurrentRailType(GetRailType(tile));
00352 uint32 p2 = SimulateDrag(from, tile, &to);
00353 return AIObject::DoCommand(tile, to, p2, CMD_REMOVE_RAILROAD_TRACK);
00354 }
00355
00360 struct AIRailSignalData {
00361 Track track;
00362 Trackdir trackdir;
00363 uint signal_cycles;
00364 };
00365
00366 static const int NUM_TRACK_DIRECTIONS = 3;
00367
00374 static const AIRailSignalData _possible_trackdirs[5][NUM_TRACK_DIRECTIONS] = {
00375 {{TRACK_UPPER, TRACKDIR_UPPER_E, 0}, {TRACK_Y, TRACKDIR_Y_SE, 0}, {TRACK_LEFT, TRACKDIR_LEFT_S, 1}},
00376 {{TRACK_RIGHT, TRACKDIR_RIGHT_S, 1}, {TRACK_X, TRACKDIR_X_SW, 1}, {TRACK_UPPER, TRACKDIR_UPPER_W, 1}},
00377 {{INVALID_TRACK, INVALID_TRACKDIR, 0}, {INVALID_TRACK, INVALID_TRACKDIR, 0}, {INVALID_TRACK, INVALID_TRACKDIR, 0}},
00378 {{TRACK_LOWER, TRACKDIR_LOWER_E, 0}, {TRACK_X, TRACKDIR_X_NE, 0}, {TRACK_LEFT, TRACKDIR_LEFT_N, 0}},
00379 {{TRACK_RIGHT, TRACKDIR_RIGHT_N, 0}, {TRACK_Y, TRACKDIR_Y_NW, 1}, {TRACK_LOWER, TRACKDIR_LOWER_W, 1}}
00380 };
00381
00382 AIRail::SignalType AIRail::GetSignalType(TileIndex tile, TileIndex front)
00383 {
00384 if (AIMap::DistanceManhattan(tile, front) != 1) return SIGNALTYPE_NONE;
00385 if (!::IsTileType(tile, MP_RAILWAY) || !::HasSignals(tile)) return SIGNALTYPE_NONE;
00386
00387 int data_index = 2 + (::TileX(front) - ::TileX(tile)) + 2 * (::TileY(front) - ::TileY(tile));
00388
00389 for (int i = 0; i < NUM_TRACK_DIRECTIONS; i++) {
00390 const Track &track = _possible_trackdirs[data_index][i].track;
00391 if (!(::TrackToTrackBits(track) & GetRailTracks(tile))) continue;
00392 if (!HasSignalOnTrack(tile, track)) continue;
00393 if (!HasSignalOnTrackdir(tile, _possible_trackdirs[data_index][i].trackdir)) continue;
00394 SignalType st = (SignalType)::GetSignalType(tile, track);
00395 if (HasSignalOnTrackdir(tile, ::ReverseTrackdir(_possible_trackdirs[data_index][i].trackdir))) st = (SignalType)(st | SIGNALTYPE_TWOWAY);
00396 return st;
00397 }
00398
00399 return SIGNALTYPE_NONE;
00400 }
00401
00405 static bool IsValidSignalType(int signal_type)
00406 {
00407 if (signal_type < AIRail::SIGNALTYPE_NORMAL || signal_type > AIRail::SIGNALTYPE_COMBO_TWOWAY) return false;
00408 if (signal_type > AIRail::SIGNALTYPE_PBS_ONEWAY && signal_type < AIRail::SIGNALTYPE_NORMAL_TWOWAY) return false;
00409 return true;
00410 }
00411
00412 bool AIRail::BuildSignal(TileIndex tile, TileIndex front, SignalType signal)
00413 {
00414 EnforcePrecondition(false, AIMap::DistanceManhattan(tile, front) == 1)
00415 EnforcePrecondition(false, ::IsPlainRailTile(tile));
00416 EnforcePrecondition(false, ::IsValidSignalType(signal));
00417
00418 Track track = INVALID_TRACK;
00419 uint signal_cycles;
00420
00421 int data_index = 2 + (::TileX(front) - ::TileX(tile)) + 2 * (::TileY(front) - ::TileY(tile));
00422 for (int i = 0; i < NUM_TRACK_DIRECTIONS; i++) {
00423 const Track &t = _possible_trackdirs[data_index][i].track;
00424 if (!(::TrackToTrackBits(t) & GetRailTracks(tile))) continue;
00425 track = t;
00426 signal_cycles = _possible_trackdirs[data_index][i].signal_cycles;
00427 break;
00428 }
00429 EnforcePrecondition(false, track != INVALID_TRACK);
00430
00431 uint p1 = track;
00432 if (signal < SIGNALTYPE_TWOWAY) {
00433 if (signal != SIGNALTYPE_PBS && signal != SIGNALTYPE_PBS_ONEWAY) signal_cycles++;
00434 p1 |= (signal_cycles << 15);
00435 }
00436 p1 |= ((signal >= SIGNALTYPE_TWOWAY ? signal ^ SIGNALTYPE_TWOWAY : signal) << 5);
00437
00438 return AIObject::DoCommand(tile, p1, 0, CMD_BUILD_SIGNALS);
00439 }
00440
00441 bool AIRail::RemoveSignal(TileIndex tile, TileIndex front)
00442 {
00443 EnforcePrecondition(false, AIMap::DistanceManhattan(tile, front) == 1)
00444 EnforcePrecondition(false, GetSignalType(tile, front) != SIGNALTYPE_NONE);
00445
00446 Track track = INVALID_TRACK;
00447 int data_index = 2 + (::TileX(front) - ::TileX(tile)) + 2 * (::TileY(front) - ::TileY(tile));
00448 for (int i = 0; i < NUM_TRACK_DIRECTIONS; i++) {
00449 const Track &t = _possible_trackdirs[data_index][i].track;
00450 if (!(::TrackToTrackBits(t) & GetRailTracks(tile))) continue;
00451 track = t;
00452 break;
00453 }
00454 EnforcePrecondition(false, track != INVALID_TRACK);
00455
00456 return AIObject::DoCommand(tile, track, 0, CMD_REMOVE_SIGNALS);
00457 }
00458
00459 Money AIRail::GetBuildCost(RailType railtype, BuildType build_type)
00460 {
00461 if (!AIRail::IsRailTypeAvailable(railtype)) return -1;
00462
00463 switch (build_type) {
00464 case BT_TRACK: return ::RailBuildCost((::RailType)railtype);
00465 case BT_SIGNAL: return ::GetPrice(PR_BUILD_SIGNALS, 1, NULL);
00466 case BT_DEPOT: return ::GetPrice(PR_BUILD_DEPOT_TRAIN, 1, NULL);
00467 case BT_STATION: return ::GetPrice(PR_BUILD_STATION_RAIL, 1, NULL) + ::GetPrice(PR_BUILD_STATION_RAIL_LENGTH, 1, NULL);
00468 case BT_WAYPOINT: return ::GetPrice(PR_BUILD_WAYPOINT_RAIL, 1, NULL);
00469 default: return -1;
00470 }
00471 }
00472
00473 int32 AIRail::GetMaxSpeed(RailType railtype)
00474 {
00475 if (!AIRail::IsRailTypeAvailable(railtype)) return -1;
00476
00477 return ::GetRailTypeInfo((::RailType)railtype)->max_speed;
00478 }