elrail.cpp

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00001 /* $Id: elrail.cpp 13685 2008-07-09 18:59:39Z rubidium $ */
00048 #include "stdafx.h"
00049 #include "openttd.h"
00050 #include "station_map.h"
00051 #include "viewport_func.h"
00052 #include "settings_type.h"
00053 #include "landscape.h"
00054 #include "rail_type.h"
00055 #include "debug.h"
00056 #include "tunnel_map.h"
00057 #include "road_map.h"
00058 #include "bridge_map.h"
00059 #include "bridge.h"
00060 #include "rail_map.h"
00061 #include "train.h"
00062 #include "rail_gui.h"
00063 #include "transparency.h"
00064 #include "tunnelbridge_map.h"
00065 #include "vehicle_func.h"
00066 #include "player_base.h"
00067 #include "tunnelbridge.h"
00068 
00069 #include "table/sprites.h"
00070 #include "table/elrail_data.h"
00071 
00072 static inline TLG GetTLG(TileIndex t)
00073 {
00074   return (TLG)((HasBit(TileX(t), 0) << 1) + HasBit(TileY(t), 0));
00075 }
00076 
00083 static TrackBits GetRailTrackBitsUniversal(TileIndex t, byte *override)
00084 {
00085   switch (GetTileType(t)) {
00086     case MP_RAILWAY:
00087       if (GetRailType(t) != RAILTYPE_ELECTRIC) return TRACK_BIT_NONE;
00088       switch (GetRailTileType(t)) {
00089         case RAIL_TILE_NORMAL: case RAIL_TILE_SIGNALS:
00090           return GetTrackBits(t);
00091         case RAIL_TILE_WAYPOINT:
00092           return GetRailWaypointBits(t);
00093         default:
00094           return TRACK_BIT_NONE;
00095       }
00096       break;
00097 
00098     case MP_TUNNELBRIDGE:
00099       if (GetRailType(t) != RAILTYPE_ELECTRIC) return TRACK_BIT_NONE;
00100       if (override != NULL && (IsTunnel(t) || GetTunnelBridgeLength(t, GetOtherBridgeEnd(t)) > 0)) {
00101         *override = 1 << GetTunnelBridgeDirection(t);
00102       }
00103       return AxisToTrackBits(DiagDirToAxis(GetTunnelBridgeDirection(t)));
00104 
00105     case MP_ROAD:
00106       if (!IsLevelCrossing(t)) return TRACK_BIT_NONE;
00107       if (GetRailType(t) != RAILTYPE_ELECTRIC) return TRACK_BIT_NONE;
00108       return GetCrossingRailBits(t);
00109 
00110     case MP_STATION:
00111       if (!IsRailwayStation(t)) return TRACK_BIT_NONE;
00112       if (GetRailType(t) != RAILTYPE_ELECTRIC) return TRACK_BIT_NONE;
00113       if (!IsStationTileElectrifiable(t)) return TRACK_BIT_NONE;
00114       return TrackToTrackBits(GetRailStationTrack(t));
00115 
00116     default:
00117       return TRACK_BIT_NONE;
00118   }
00119 }
00120 
00125 static void AdjustTileh(TileIndex tile, Slope *tileh)
00126 {
00127   if (IsTileType(tile, MP_TUNNELBRIDGE)) {
00128     if (IsTunnel(tile)) {
00129       *tileh = SLOPE_STEEP; // XXX - Hack to make tunnel entrances to always have a pylon
00130     } else if (*tileh != SLOPE_FLAT) {
00131       *tileh = SLOPE_FLAT;
00132     } else {
00133       *tileh = InclinedSlope(GetTunnelBridgeDirection(tile));
00134     }
00135   }
00136 }
00137 
00145 static byte GetPCPElevation(TileIndex tile, DiagDirection PCPpos)
00146 {
00147   /* The elevation of the "pylon"-sprite should be the elevation at the PCP.
00148    * PCPs are always on a tile edge.
00149    *
00150    * This position can be outside of the tile, i.e. ?_pcp_offset == TILE_SIZE > TILE_SIZE - 1.
00151    * So we have to move it inside the tile, because if the neighboured tile has a foundation,
00152    * that does not smoothly connect to the current tile, we will get a wrong elevation from GetSlopeZ().
00153    *
00154    * When we move the position inside the tile, we will get a wrong elevation if we have a slope.
00155    * To catch all cases we round the Z position to the next (TILE_HEIGHT / 2).
00156    * This will return the correct elevation for slopes and will also detect non-continuous elevation on edges.
00157    *
00158    * Also note that the result of GetSlopeZ() is very special on bridge-ramps.
00159    */
00160 
00161   byte z = GetSlopeZ(TileX(tile) * TILE_SIZE + min(x_pcp_offsets[PCPpos], TILE_SIZE - 1), TileY(tile) * TILE_SIZE + min(y_pcp_offsets[PCPpos], TILE_SIZE - 1));
00162   return (z + 2) & ~3; // this means z = (z + TILE_HEIGHT / 4) / (TILE_HEIGHT / 2) * (TILE_HEIGHT / 2);
00163 }
00164 
00172 void DrawCatenaryOnTunnel(const TileInfo *ti)
00173 {
00174   /* xmin, ymin, xmax + 1, ymax + 1 of BB */
00175   static const int _tunnel_wire_BB[4][4] = {
00176     { 0, 1, 16, 15 }, // NE
00177     { 1, 0, 15, 16 }, // SE
00178     { 0, 1, 16, 15 }, // SW
00179     { 1, 0, 15, 16 }, // NW
00180   };
00181 
00182   if ((GetRailType(ti->tile) != RAILTYPE_ELECTRIC) || _patches.disable_elrails) return;
00183 
00184   DiagDirection dir = GetTunnelBridgeDirection(ti->tile);
00185 
00186   const SortableSpriteStruct *sss = &CatenarySpriteData_Tunnel[dir];
00187   const int *BB_data = _tunnel_wire_BB[dir];
00188   AddSortableSpriteToDraw(
00189     sss->image, PAL_NONE, ti->x + sss->x_offset, ti->y + sss->y_offset,
00190     BB_data[2] - sss->x_offset, BB_data[3] - sss->y_offset, BB_Z_SEPARATOR - sss->z_offset + 1,
00191     GetTileZ(ti->tile) + sss->z_offset,
00192     IsTransparencySet(TO_CATENARY),
00193     BB_data[0] - sss->x_offset, BB_data[1] - sss->y_offset, BB_Z_SEPARATOR - sss->z_offset
00194   );
00195 }
00196 
00200 static void DrawCatenaryRailway(const TileInfo *ti)
00201 {
00202   /* Pylons are placed on a tile edge, so we need to take into account
00203    * the track configuration of 2 adjacent tiles. trackconfig[0] stores the
00204    * current tile (home tile) while [1] holds the neighbour */
00205   TrackBits trackconfig[TS_END];
00206   bool isflat[TS_END];
00207   /* Note that ti->tileh has already been adjusted for Foundations */
00208   Slope tileh[TS_END] = { ti->tileh, SLOPE_FLAT };
00209 
00210   /* Half tile slopes coincide only with horizontal/vertical track.
00211    * Faking a flat slope results in the correct sprites on positions. */
00212   if (IsHalftileSlope(tileh[TS_HOME])) tileh[TS_HOME] = SLOPE_FLAT;
00213 
00214   TLG tlg = GetTLG(ti->tile);
00215   byte PCPstatus = 0;
00216   byte OverridePCP = 0;
00217   byte PPPpreferred[DIAGDIR_END];
00218   byte PPPallowed[DIAGDIR_END];
00219   DiagDirection i;
00220   Track t;
00221 
00222   /* Find which rail bits are present, and select the override points.
00223    * We don't draw a pylon:
00224    * 1) INSIDE a tunnel (we wouldn't see it anyway)
00225    * 2) on the "far" end of a bridge head (the one that connects to bridge middle),
00226    *    because that one is drawn on the bridge. Exception is for length 0 bridges
00227    *    which have no middle tiles */
00228   trackconfig[TS_HOME] = GetRailTrackBitsUniversal(ti->tile, &OverridePCP);
00229   /* If a track bit is present that is not in the main direction, the track is level */
00230   isflat[TS_HOME] = ((trackconfig[TS_HOME] & (TRACK_BIT_HORZ | TRACK_BIT_VERT)) != 0);
00231 
00232   AdjustTileh(ti->tile, &tileh[TS_HOME]);
00233 
00234   for (i = DIAGDIR_NE; i < DIAGDIR_END; i++) {
00235     TileIndex neighbour = ti->tile + TileOffsByDiagDir(i);
00236     Foundation foundation = FOUNDATION_NONE;
00237     int k;
00238 
00239     /* Here's one of the main headaches. GetTileSlope does not correct for possibly
00240      * existing foundataions, so we do have to do that manually later on.*/
00241     tileh[TS_NEIGHBOUR] = GetTileSlope(neighbour, NULL);
00242     trackconfig[TS_NEIGHBOUR] = GetRailTrackBitsUniversal(neighbour, NULL);
00243     if (IsTunnelTile(neighbour) && i != GetTunnelBridgeDirection(neighbour)) trackconfig[TS_NEIGHBOUR] = TRACK_BIT_NONE;
00244 
00245     /* If the neighboured tile does not smoothly connect to the current tile (because of a foundation),
00246      * we have to draw all pillars on the current tile. */
00247     if (GetPCPElevation(ti->tile, i) != GetPCPElevation(neighbour, ReverseDiagDir(i))) trackconfig[TS_NEIGHBOUR] = TRACK_BIT_NONE;
00248 
00249     isflat[TS_NEIGHBOUR] = ((trackconfig[TS_NEIGHBOUR] & (TRACK_BIT_HORZ | TRACK_BIT_VERT)) != 0);
00250 
00251     PPPpreferred[i] = 0xFF; // We start with preferring everything (end-of-line in any direction)
00252     PPPallowed[i] = AllowedPPPonPCP[i];
00253 
00254     /* We cycle through all the existing tracks at a PCP and see what
00255      * PPPs we want to have, or may not have at all */
00256     for (k = 0; k < NUM_TRACKS_AT_PCP; k++) {
00257       /* Next to us, we have a bridge head, don't worry about that one, if it shows away from us */
00258       if (TrackSourceTile[i][k] == TS_NEIGHBOUR &&
00259           IsBridgeTile(neighbour) &&
00260           GetTunnelBridgeDirection(neighbour) == ReverseDiagDir(i)) {
00261         continue;
00262       }
00263 
00264       /* We check whether the track in question (k) is present in the tile
00265        * (TrackSourceTile) */
00266       if (HasBit(trackconfig[TrackSourceTile[i][k]], TracksAtPCP[i][k])) {
00267         /* track found, if track is in the neighbour tile, adjust the number
00268          * of the PCP for preferred/allowed determination*/
00269         DiagDirection PCPpos = (TrackSourceTile[i][k] == TS_HOME) ? i : ReverseDiagDir(i);
00270         SetBit(PCPstatus, i); // This PCP is in use
00271 
00272         PPPpreferred[i] &= PreferredPPPofTrackAtPCP[TracksAtPCP[i][k]][PCPpos];
00273         PPPallowed[i] &= ~DisallowedPPPofTrackAtPCP[TracksAtPCP[i][k]][PCPpos];
00274       }
00275     }
00276 
00277     /* Deactivate all PPPs if PCP is not used */
00278     PPPpreferred[i] *= HasBit(PCPstatus, i);
00279     PPPallowed[i] *= HasBit(PCPstatus, i);
00280 
00281     /* A station is always "flat", so adjust the tileh accordingly */
00282     if (IsTileType(neighbour, MP_STATION)) tileh[TS_NEIGHBOUR] = SLOPE_FLAT;
00283 
00284     /* Read the foundataions if they are present, and adjust the tileh */
00285     if (trackconfig[TS_NEIGHBOUR] != TRACK_BIT_NONE && IsTileType(neighbour, MP_RAILWAY) && GetRailType(neighbour) == RAILTYPE_ELECTRIC) foundation = GetRailFoundation(tileh[TS_NEIGHBOUR], trackconfig[TS_NEIGHBOUR]);
00286     if (IsBridgeTile(neighbour)) {
00287       foundation = GetBridgeFoundation(tileh[TS_NEIGHBOUR], DiagDirToAxis(GetTunnelBridgeDirection(neighbour)));
00288     }
00289 
00290     ApplyFoundationToSlope(foundation, &tileh[TS_NEIGHBOUR]);
00291 
00292   /* Half tile slopes coincide only with horizontal/vertical track.
00293    * Faking a flat slope results in the correct sprites on positions. */
00294     if (IsHalftileSlope(tileh[TS_NEIGHBOUR])) tileh[TS_NEIGHBOUR] = SLOPE_FLAT;
00295 
00296     AdjustTileh(neighbour, &tileh[TS_NEIGHBOUR]);
00297 
00298     /* If we have a straight (and level) track, we want a pylon only every 2 tiles
00299      * Delete the PCP if this is the case. */
00300     /* Level means that the slope is the same, or the track is flat */
00301     if (tileh[TS_HOME] == tileh[TS_NEIGHBOUR] || (isflat[TS_HOME] && isflat[TS_NEIGHBOUR])) {
00302       for (k = 0; k < NUM_IGNORE_GROUPS; k++)
00303         if (PPPpreferred[i] == IgnoredPCP[k][tlg][i]) ClrBit(PCPstatus, i);
00304     }
00305 
00306     /* Now decide where we draw our pylons. First try the preferred PPPs, but they may not exist.
00307      * In that case, we try the any of the allowed ones. if they don't exist either, don't draw
00308      * anything. Note that the preferred PPPs still contain the end-of-line markers.
00309      * Remove those (simply by ANDing with allowed, since these markers are never allowed) */
00310     if ((PPPallowed[i] & PPPpreferred[i]) != 0) PPPallowed[i] &= PPPpreferred[i];
00311 
00312     if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile)) {
00313       Track bridgetrack = GetBridgeAxis(ti->tile) == AXIS_X ? TRACK_X : TRACK_Y;
00314       uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
00315 
00316       if ((height <= GetTileMaxZ(ti->tile) + TILE_HEIGHT) &&
00317           (i == PCPpositions[bridgetrack][0] || i == PCPpositions[bridgetrack][1])) {
00318         SetBit(OverridePCP, i);
00319       }
00320     }
00321 
00322     if (PPPallowed[i] != 0 && HasBit(PCPstatus, i) && !HasBit(OverridePCP, i)) {
00323       for (k = 0; k < DIR_END; k++) {
00324         byte temp = PPPorder[i][GetTLG(ti->tile)][k];
00325 
00326         if (HasBit(PPPallowed[i], temp)) {
00327           uint x  = ti->x + x_pcp_offsets[i] + x_ppp_offsets[temp];
00328           uint y  = ti->y + y_pcp_offsets[i] + y_ppp_offsets[temp];
00329 
00330           /* Don't build the pylon if it would be outside the tile */
00331           if (!HasBit(OwnedPPPonPCP[i], temp)) {
00332             /* We have a neighour that will draw it, bail out */
00333             if (trackconfig[TS_NEIGHBOUR] != 0) break;
00334             continue; /* No neighbour, go looking for a better position */
00335           }
00336 
00337           AddSortableSpriteToDraw(pylon_sprites[temp], PAL_NONE, x, y, 1, 1, BB_HEIGHT_UNDER_BRIDGE,
00338               GetPCPElevation(ti->tile, i),
00339               IsTransparencySet(TO_CATENARY), -1, -1);
00340           break; /* We already have drawn a pylon, bail out */
00341         }
00342       }
00343     }
00344   }
00345 
00346   /* Don't draw a wire under a low bridge */
00347   if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && !IsTransparencySet(TO_CATENARY)) {
00348     uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
00349 
00350     if (height <= GetTileMaxZ(ti->tile) + TILE_HEIGHT) return;
00351   }
00352 
00353   /* Drawing of pylons is finished, now draw the wires */
00354   for (t = TRACK_BEGIN; t < TRACK_END; t++) {
00355     if (HasBit(trackconfig[TS_HOME], t)) {
00356       if (IsTunnelTile(ti->tile)) break; // drawn together with tunnel-roof (see DrawCatenaryOnTunnel())
00357       byte PCPconfig = HasBit(PCPstatus, PCPpositions[t][0]) +
00358         (HasBit(PCPstatus, PCPpositions[t][1]) << 1);
00359 
00360       const SortableSpriteStruct *sss;
00361       int tileh_selector = !(tileh[TS_HOME] % 3) * tileh[TS_HOME] / 3; /* tileh for the slopes, 0 otherwise */
00362 
00363       assert(PCPconfig != 0); /* We have a pylon on neither end of the wire, that doesn't work (since we have no sprites for that) */
00364       assert(!IsSteepSlope(tileh[TS_HOME]));
00365       sss = &CatenarySpriteData[Wires[tileh_selector][t][PCPconfig]];
00366 
00367       /*
00368        * The "wire"-sprite position is inside the tile, i.e. 0 <= sss->?_offset < TILE_SIZE.
00369        * Therefore it is save to use GetSlopeZ() for the elevation.
00370        * Also note, that the result of GetSlopeZ() is very special for bridge-ramps.
00371        */
00372       AddSortableSpriteToDraw(sss->image, PAL_NONE, ti->x + sss->x_offset, ti->y + sss->y_offset,
00373         sss->x_size, sss->y_size, sss->z_size, GetSlopeZ(ti->x + sss->x_offset, ti->y + sss->y_offset) + sss->z_offset,
00374         IsTransparencySet(TO_CATENARY));
00375     }
00376   }
00377 }
00378 
00379 static void DrawCatenaryOnBridge(const TileInfo *ti)
00380 {
00381   TileIndex end = GetSouthernBridgeEnd(ti->tile);
00382   TileIndex start = GetOtherBridgeEnd(end);
00383 
00384   uint length = GetTunnelBridgeLength(start, end);
00385   uint num = GetTunnelBridgeLength(ti->tile, start) + 1;
00386   uint height;
00387 
00388   const SortableSpriteStruct *sss;
00389   Axis axis = GetBridgeAxis(ti->tile);
00390   TLG tlg = GetTLG(ti->tile);
00391 
00392   CatenarySprite offset = (CatenarySprite)(axis == AXIS_X ? 0 : WIRE_Y_FLAT_BOTH - WIRE_X_FLAT_BOTH);
00393 
00394   if ((length % 2) && num == length) {
00395     /* Draw the "short" wire on the southern end of the bridge
00396      * only needed if the length of the bridge is odd */
00397     sss = &CatenarySpriteData[WIRE_X_FLAT_BOTH + offset];
00398   } else {
00399     /* Draw "long" wires on all other tiles of the bridge (one pylon every two tiles) */
00400     sss = &CatenarySpriteData[WIRE_X_FLAT_SW + (num % 2) + offset];
00401   }
00402 
00403   height = GetBridgeHeight(end);
00404 
00405   AddSortableSpriteToDraw(sss->image, PAL_NONE, ti->x + sss->x_offset, ti->y + sss->y_offset,
00406     sss->x_size, sss->y_size, sss->z_size, height + sss->z_offset,
00407     IsTransparencySet(TO_CATENARY)
00408   );
00409 
00410   /* Finished with wires, draw pylons */
00411   /* every other tile needs a pylon on the northern end */
00412   if (num % 2) {
00413     DiagDirection PCPpos = (axis == AXIS_X ? DIAGDIR_NE : DIAGDIR_NW);
00414     Direction PPPpos = (axis == AXIS_X ? DIR_NW : DIR_NE);
00415     if (HasBit(tlg, (axis == AXIS_X ? 0 : 1))) PPPpos = ReverseDir(PPPpos);
00416     uint x = ti->x + x_pcp_offsets[PCPpos] + x_ppp_offsets[PPPpos];
00417     uint y = ti->y + y_pcp_offsets[PCPpos] + y_ppp_offsets[PPPpos];
00418     AddSortableSpriteToDraw(pylon_sprites[PPPpos], PAL_NONE, x, y, 1, 1, BB_HEIGHT_UNDER_BRIDGE, height, IsTransparencySet(TO_CATENARY), -1, -1);
00419   }
00420 
00421   /* need a pylon on the southern end of the bridge */
00422   if (GetTunnelBridgeLength(ti->tile, start) + 1 == length) {
00423     DiagDirection PCPpos = (axis == AXIS_X ? DIAGDIR_SW : DIAGDIR_SE);
00424     Direction PPPpos = (axis == AXIS_X ? DIR_NW : DIR_NE);
00425     if (HasBit(tlg, (axis == AXIS_X ? 0 : 1))) PPPpos = ReverseDir(PPPpos);
00426     uint x = ti->x + x_pcp_offsets[PCPpos] + x_ppp_offsets[PPPpos];
00427     uint y = ti->y + y_pcp_offsets[PCPpos] + y_ppp_offsets[PPPpos];
00428     AddSortableSpriteToDraw(pylon_sprites[PPPpos], PAL_NONE, x, y, 1, 1, BB_HEIGHT_UNDER_BRIDGE, height, IsTransparencySet(TO_CATENARY), -1, -1);
00429   }
00430 }
00431 
00432 void DrawCatenary(const TileInfo *ti)
00433 {
00434   if (_patches.disable_elrails) return;
00435 
00436   if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile)) {
00437     TileIndex head = GetNorthernBridgeEnd(ti->tile);
00438 
00439     if (GetTunnelBridgeTransportType(head) == TRANSPORT_RAIL && GetRailType(head) == RAILTYPE_ELECTRIC) {
00440       DrawCatenaryOnBridge(ti);
00441     }
00442   }
00443 
00444   switch (GetTileType(ti->tile)) {
00445     case MP_RAILWAY:
00446       if (IsRailDepot(ti->tile)) {
00447         const SortableSpriteStruct *sss = &CatenarySpriteData_Depot[GetRailDepotDirection(ti->tile)];
00448 
00449         /* This wire is not visible with the default depot sprites */
00450         AddSortableSpriteToDraw(
00451           sss->image, PAL_NONE, ti->x + sss->x_offset, ti->y + sss->y_offset,
00452           sss->x_size, sss->y_size, sss->z_size,
00453           GetTileMaxZ(ti->tile) + sss->z_offset,
00454           IsTransparencySet(TO_CATENARY)
00455         );
00456         return;
00457       }
00458       break;
00459 
00460     case MP_TUNNELBRIDGE:
00461     case MP_ROAD:
00462     case MP_STATION:
00463       break;
00464 
00465     default: return;
00466   }
00467   DrawCatenaryRailway(ti);
00468 }
00469 
00470 int32 SettingsDisableElrail(int32 p1)
00471 {
00472   Vehicle *v;
00473   Player *p;
00474   bool disable = (p1 != 0);
00475 
00476   /* we will now walk through all electric train engines and change their railtypes if it is the wrong one*/
00477   const RailType old_railtype = disable ? RAILTYPE_ELECTRIC : RAILTYPE_RAIL;
00478   const RailType new_railtype = disable ? RAILTYPE_RAIL : RAILTYPE_ELECTRIC;
00479 
00480   /* walk through all train engines */
00481   EngineID eid;
00482   FOR_ALL_ENGINEIDS_OF_TYPE(eid, VEH_TRAIN) {
00483     RailVehicleInfo *rv_info = &_rail_vehicle_info[eid];
00484     /* if it is an electric rail engine and its railtype is the wrong one */
00485     if (rv_info->engclass == 2 && rv_info->railtype == old_railtype) {
00486       /* change it to the proper one */
00487       rv_info->railtype = new_railtype;
00488     }
00489   }
00490 
00491   /* when disabling elrails, make sure that all existing trains can run on
00492   *  normal rail too */
00493   if (disable) {
00494     FOR_ALL_VEHICLES(v) {
00495       if (v->type == VEH_TRAIN && v->u.rail.railtype == RAILTYPE_ELECTRIC) {
00496         /* this railroad vehicle is now compatible only with elrail,
00497         *  so add there also normal rail compatibility */
00498         v->u.rail.compatible_railtypes |= RAILTYPES_RAIL;
00499         v->u.rail.railtype = RAILTYPE_RAIL;
00500         SetBit(v->u.rail.flags, VRF_EL_ENGINE_ALLOWED_NORMAL_RAIL);
00501       }
00502     }
00503   }
00504 
00505   /* Fix the total power and acceleration for trains */
00506   FOR_ALL_VEHICLES(v) {
00507     /* power and acceleration is cached only for front engines */
00508     if (v->type == VEH_TRAIN && IsFrontEngine(v)) {
00509       TrainPowerChanged(v);
00510       UpdateTrainAcceleration(v);
00511     }
00512   }
00513 
00514   FOR_ALL_PLAYERS(p) p->avail_railtypes = GetPlayerRailtypes(p->index);
00515 
00516   /* This resets the _last_built_railtype, which will be invalid for electric
00517   * rails. It may have unintended consequences if that function is ever
00518   * extended, though. */
00519   ReinitGuiAfterToggleElrail(disable);
00520   return 0;
00521 }

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