void CopyPastePlaceRailWaypoint(GenericTileIndex tile, StationID sid, Axis axis, RailType rt, StationGfx gfx, StationClassID stat_class, byte stat_type, int specindex, bool adjacent)
{
if (IsMainMapTile(tile)) {
TileIndex t = AsMainMapTile(tile);
/* check if required track is already there, try to build one if not */
if (!IsTileOwner(t, _current_company) ||
(!IsRailWaypointTile(tile) && !IsPlainRailTile(tile)) ||
GetRailType(t) != rt ||
(IsTileType(t, MP_STATION) ? GetRailStationAxis(tile) != axis : !HasBit(GetTrackBits(t), AxisToTrack(axis)))) {
CopyPastePlaceTracks(tile, rt, AxisToTrackBits(axis));
if (_current_pasting->last_result.Failed()) return;
}
/* build the waypoint */
_station_cmd_specindex_to_paste = specindex;
uint32 p1 = 0;
SB(p1, 0, 4, rt);
SB(p1, 4, 1, axis);
SB(p1, 8, 8, 1); // width
SB(p1, 16, 8, 1); // height
SB(p1, 24, 1, adjacent);
uint32 p2 = 0;
SB(p2, 0, 8, stat_class);
SB(p2, 8, 8, stat_type);
SB(p2, 16, 16, sid);
_current_pasting->DoCommand(t, p1, p2, CMD_BUILD_RAIL_WAYPOINT | CMD_MSG(STR_ERROR_CAN_T_BUILD_TRAIN_WAYPOINT));
} else {
MakeRailWaypoint(tile, OWNER_NONE, sid, axis, gfx & ~1, rt);
assert(IsInsideMM(specindex, 0, MAX_UVALUE(byte) + 1));
SetCustomStationSpecIndex(tile, (byte)specindex);
_clipboard_stations_builder.AddRailPart(sid, stat_class, stat_type, (byte)specindex);
}
}
ETileArea(const BaseStation *st, TileIndex tile, TriggerArea ta)
{
switch (ta) {
default: NOT_REACHED();
case TA_TILE:
this->tile = tile;
this->w = 1;
this->h = 1;
break;
case TA_PLATFORM: {
TileIndex start, end;
Axis axis = GetRailStationAxis(tile);
TileIndexDiff delta = TileOffsByDiagDir(AxisToDiagDir(axis));
for (end = tile; IsRailStationTile(end + delta) && IsCompatibleTrainStationTile(end + delta, tile); end += delta) { /* Nothing */ }
for (start = tile; IsRailStationTile(start - delta) && IsCompatibleTrainStationTile(start - delta, tile); start -= delta) { /* Nothing */ }
this->tile = start;
this->w = TileX(end) - TileX(start) + 1;
this->h = TileY(end) - TileY(start) + 1;
break;
}
case TA_WHOLE:
st->GetTileArea(this, Station::IsExpected(st) ? STATION_RAIL : STATION_WAYPOINT);
break;
}
}
/**
* Find the end of a railway station, from the \a tile, in the direction of \a delta.
* @param tile Start tile.
* @param delta Movement direction.
* @param check_type Stop when the custom station type changes.
* @param check_axis Stop when the station direction changes.
* @return Found end of the railway station.
*/
static TileIndex FindRailStationEnd(TileIndex tile, TileIndexDiff delta, bool check_type, bool check_axis)
{
byte orig_type = 0;
Axis orig_axis = AXIS_X;
StationID sid = GetStationIndex(tile);
if (check_type) orig_type = GetCustomStationSpecIndex(tile);
if (check_axis) orig_axis = GetRailStationAxis(tile);
for (;;) {
TileIndex new_tile = TILE_ADD(tile, delta);
if (!IsTileType(new_tile, MP_STATION) || GetStationIndex(new_tile) != sid) break;
if (!HasStationRail(new_tile)) break;
if (check_type && GetCustomStationSpecIndex(new_tile) != orig_type) break;
if (check_axis && GetRailStationAxis(new_tile) != orig_axis) break;
tile = new_tile;
}
return tile;
}
/**
* Get the axis for a new waypoint. This means that if it is a valid
* tile to build a waypoint on it returns a valid Axis, otherwise an
* invalid one.
* @param tile the tile to look at.
* @return the axis for the to-be-build waypoint.
*/
Axis GetAxisForNewWaypoint(TileIndex tile)
{
/* The axis for rail waypoints is easy. */
if (IsRailWaypointTile(tile)) return GetRailStationAxis(tile);
/* Non-plain rail type, no valid axis for waypoints. */
if (!IsTileType(tile, MP_RAILWAY) || GetRailTileType(tile) != RAIL_TILE_NORMAL) return INVALID_AXIS;
switch (GetTrackBits(tile)) {
case TRACK_BIT_X: return AXIS_X;
case TRACK_BIT_Y: return AXIS_Y;
default: return INVALID_AXIS;
}
}
static uint32 GetPlatformInfoHelper(TileIndex tile, bool check_type, bool check_axis, bool centred)
{
int tx = TileX(tile);
int ty = TileY(tile);
int sx = TileX(FindRailStationEnd(tile, TileDiffXY(-1, 0), check_type, check_axis));
int sy = TileY(FindRailStationEnd(tile, TileDiffXY( 0, -1), check_type, check_axis));
int ex = TileX(FindRailStationEnd(tile, TileDiffXY( 1, 0), check_type, check_axis)) + 1;
int ey = TileY(FindRailStationEnd(tile, TileDiffXY( 0, 1), check_type, check_axis)) + 1;
tx -= sx; ex -= sx;
ty -= sy; ey -= sy;
return GetPlatformInfo(GetRailStationAxis(tile), GetStationGfx(tile), ex, ey, tx, ty, centred);
}
/* virtual */ uint Station::GetPlatformLength(TileIndex tile) const
{
assert(this->TileBelongsToRailStation(tile));
TileIndexDiff delta = (GetRailStationAxis(tile) == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
TileIndex t = tile;
uint len = 0;
do {
t -= delta;
len++;
} while (IsCompatibleTrainStationTile(t, tile));
t = tile;
do {
t += delta;
len++;
} while (IsCompatibleTrainStationTile(t, tile));
return len - 1;
}
static uint32 GetRailContinuationInfo(TileIndex tile)
{
/* Tile offsets and exit dirs for X axis */
static const Direction x_dir[8] = { DIR_SW, DIR_NE, DIR_SE, DIR_NW, DIR_S, DIR_E, DIR_W, DIR_N };
static const DiagDirection x_exits[8] = { DIAGDIR_SW, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NE, DIAGDIR_SW, DIAGDIR_NE };
/* Tile offsets and exit dirs for Y axis */
static const Direction y_dir[8] = { DIR_SE, DIR_NW, DIR_SW, DIR_NE, DIR_S, DIR_W, DIR_E, DIR_N };
static const DiagDirection y_exits[8] = { DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SE, DIAGDIR_NW };
Axis axis = GetRailStationAxis(tile);
/* Choose appropriate lookup table to use */
const Direction *dir = axis == AXIS_X ? x_dir : y_dir;
const DiagDirection *diagdir = axis == AXIS_X ? x_exits : y_exits;
uint32 res = 0;
uint i;
for (i = 0; i < lengthof(x_dir); i++, dir++, diagdir++) {
TileIndex neighbour_tile = tile + TileOffsByDir(*dir);
TrackBits trackbits = TrackStatusToTrackBits(GetTileTrackStatus(neighbour_tile, TRANSPORT_RAIL, 0));
if (trackbits != TRACK_BIT_NONE) {
/* If there is any track on the tile, set the bit in the second byte */
SetBit(res, i + 8);
/* With tunnels and bridges the tile has tracks, but they are not necessarily connected
* with the next tile because the ramp is not going in the right direction. */
if (IsTileType(neighbour_tile, MP_TUNNELBRIDGE) && GetTunnelBridgeDirection(neighbour_tile) != *diagdir) {
continue;
}
/* If any track reaches our exit direction, set the bit in the lower byte */
if (trackbits & DiagdirReachesTracks(*diagdir)) SetBit(res, i);
}
}
return res;
}
/**
* Search signal block
*
* @param owner owner whose signals we are updating
* @return SigFlags
*/
static SigFlags ExploreSegment(Owner owner)
{
SigFlags flags = SF_NONE;
TileIndex tile;
DiagDirection enterdir;
while (_tbdset.Get(&tile, &enterdir)) {
TileIndex oldtile = tile; // tile we are leaving
DiagDirection exitdir = enterdir == INVALID_DIAGDIR ? INVALID_DIAGDIR : ReverseDiagDir(enterdir); // expected new exit direction (for straight line)
switch (GetTileType(tile)) {
case MP_RAILWAY: {
if (GetTileOwner(tile) != owner) continue; // do not propagate signals on others' tiles (remove for tracksharing)
if (IsRailDepot(tile)) {
if (enterdir == INVALID_DIAGDIR) { // from 'inside' - train just entered or left the depot
if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN;
exitdir = GetRailDepotDirection(tile);
tile += TileOffsByDiagDir(exitdir);
enterdir = ReverseDiagDir(exitdir);
break;
} else if (enterdir == GetRailDepotDirection(tile)) { // entered a depot
if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN;
continue;
} else {
continue;
}
}
TrackBits tracks = GetTrackBits(tile); // trackbits of tile
TrackBits tracks_masked = (TrackBits)(tracks & _enterdir_to_trackbits[enterdir]); // only incidating trackbits
if (tracks == TRACK_BIT_HORZ || tracks == TRACK_BIT_VERT) { // there is exactly one incidating track, no need to check
tracks = tracks_masked;
/* If no train detected yet, and there is not no train -> there is a train -> set the flag */
if (!(flags & SF_TRAIN) && EnsureNoTrainOnTrackBits(tile, tracks).Failed()) flags |= SF_TRAIN;
} else {
if (tracks_masked == TRACK_BIT_NONE) continue; // no incidating track
if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN;
}
if (HasSignals(tile)) { // there is exactly one track - not zero, because there is exit from this tile
Track track = TrackBitsToTrack(tracks_masked); // mask TRACK_BIT_X and Y too
if (HasSignalOnTrack(tile, track)) { // now check whole track, not trackdir
SignalType sig = GetSignalType(tile, track);
Trackdir trackdir = (Trackdir)FindFirstBit((tracks * 0x101) & _enterdir_to_trackdirbits[enterdir]);
Trackdir reversedir = ReverseTrackdir(trackdir);
/* add (tile, reversetrackdir) to 'to-be-updated' set when there is
* ANY conventional signal in REVERSE direction
* (if it is a presignal EXIT and it changes, it will be added to 'to-be-done' set later) */
if (HasSignalOnTrackdir(tile, reversedir)) {
if (IsPbsSignal(sig)) {
flags |= SF_PBS;
} else if (!_tbuset.Add(tile, reversedir)) {
return flags | SF_FULL;
}
}
if (HasSignalOnTrackdir(tile, trackdir) && !IsOnewaySignal(tile, track)) flags |= SF_PBS;
/* if it is a presignal EXIT in OUR direction and we haven't found 2 green exits yes, do special check */
if (!(flags & SF_GREEN2) && IsPresignalExit(tile, track) && HasSignalOnTrackdir(tile, trackdir)) { // found presignal exit
if (flags & SF_EXIT) flags |= SF_EXIT2; // found two (or more) exits
flags |= SF_EXIT; // found at least one exit - allow for compiler optimizations
if (GetSignalStateByTrackdir(tile, trackdir) == SIGNAL_STATE_GREEN) { // found green presignal exit
if (flags & SF_GREEN) flags |= SF_GREEN2;
flags |= SF_GREEN;
}
}
continue;
}
}
for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) { // test all possible exit directions
if (dir != enterdir && (tracks & _enterdir_to_trackbits[dir])) { // any track incidating?
TileIndex newtile = tile + TileOffsByDiagDir(dir); // new tile to check
DiagDirection newdir = ReverseDiagDir(dir); // direction we are entering from
if (!MaybeAddToTodoSet(newtile, newdir, tile, dir)) return flags | SF_FULL;
}
}
continue; // continue the while() loop
}
case MP_STATION:
if (!HasStationRail(tile)) continue;
if (GetTileOwner(tile) != owner) continue;
if (DiagDirToAxis(enterdir) != GetRailStationAxis(tile)) continue; // different axis
if (IsStationTileBlocked(tile)) continue; // 'eye-candy' station tile
if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN;
tile += TileOffsByDiagDir(exitdir);
break;
case MP_ROAD:
if (!IsLevelCrossing(tile)) continue;
if (GetTileOwner(tile) != owner) continue;
if (DiagDirToAxis(enterdir) == GetCrossingRoadAxis(tile)) continue; // different axis
if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN;
tile += TileOffsByDiagDir(exitdir);
break;
case MP_TUNNELBRIDGE: {
if (GetTileOwner(tile) != owner) continue;
if (GetTunnelBridgeTransportType(tile) != TRANSPORT_RAIL) continue;
DiagDirection dir = GetTunnelBridgeDirection(tile);
if (enterdir == INVALID_DIAGDIR) { // incoming from the wormhole
if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN;
enterdir = dir;
exitdir = ReverseDiagDir(dir);
tile += TileOffsByDiagDir(exitdir); // just skip to next tile
} else { // NOT incoming from the wormhole!
if (ReverseDiagDir(enterdir) != dir) continue;
if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, NULL, &TrainOnTileEnum)) flags |= SF_TRAIN;
tile = GetOtherTunnelBridgeEnd(tile); // just skip to exit tile
enterdir = INVALID_DIAGDIR;
exitdir = INVALID_DIAGDIR;
}
}
break;
default:
continue; // continue the while() loop
}
if (!MaybeAddToTodoSet(tile, enterdir, oldtile, exitdir)) return flags | SF_FULL;
}
return flags;
}
/* virtual */ uint32 StationScopeResolver::GetVariable(byte variable, uint32 parameter, bool *available) const
{
if (this->st == NULL) {
/* Station does not exist, so we're in a purchase list or the land slope check callback. */
switch (variable) {
case 0x40:
case 0x41:
case 0x46:
case 0x47:
case 0x49: return 0x2110000; // Platforms, tracks & position
case 0x42: return 0; // Rail type (XXX Get current type from GUI?)
case 0x43: return GetCompanyInfo(_current_company); // Station owner
case 0x44: return 2; // PBS status
case 0x67: // Land info of nearby tile
if (this->axis != INVALID_AXIS && this->tile != INVALID_TILE) {
TileIndex tile = this->tile;
if (parameter != 0) tile = GetNearbyTile(parameter, tile, true, this->axis); // only perform if it is required
Slope tileh = GetTileSlope(tile);
bool swap = (this->axis == AXIS_Y && HasBit(tileh, CORNER_W) != HasBit(tileh, CORNER_E));
return GetNearbyTileInformation(tile, this->ro.grffile->grf_version >= 8) ^ (swap ? SLOPE_EW : 0);
}
break;
case 0xFA: return Clamp(_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Build date, clamped to a 16 bit value
}
*available = false;
return UINT_MAX;
}
switch (variable) {
/* Calculated station variables */
case 0x40:
if (!HasBit(_svc.valid, 0)) { _svc.v40 = GetPlatformInfoHelper(this->tile, false, false, false); SetBit(_svc.valid, 0); }
return _svc.v40;
case 0x41:
if (!HasBit(_svc.valid, 1)) { _svc.v41 = GetPlatformInfoHelper(this->tile, true, false, false); SetBit(_svc.valid, 1); }
return _svc.v41;
case 0x42: return GetTerrainType(this->tile) | (GetReverseRailTypeTranslation(GetRailType(this->tile), this->statspec->grf_prop.grffile) << 8);
case 0x43: return GetCompanyInfo(this->st->owner); // Station owner
case 0x44: return HasStationReservation(this->tile) ? 7 : 4; // PBS status
case 0x45:
if (!HasBit(_svc.valid, 2)) { _svc.v45 = GetRailContinuationInfo(this->tile); SetBit(_svc.valid, 2); }
return _svc.v45;
case 0x46:
if (!HasBit(_svc.valid, 3)) { _svc.v46 = GetPlatformInfoHelper(this->tile, false, false, true); SetBit(_svc.valid, 3); }
return _svc.v46;
case 0x47:
if (!HasBit(_svc.valid, 4)) { _svc.v47 = GetPlatformInfoHelper(this->tile, true, false, true); SetBit(_svc.valid, 4); }
return _svc.v47;
case 0x49:
if (!HasBit(_svc.valid, 5)) { _svc.v49 = GetPlatformInfoHelper(this->tile, false, true, false); SetBit(_svc.valid, 5); }
return _svc.v49;
case 0x4A: // Animation frame of tile
return GetAnimationFrame(this->tile);
/* Variables which use the parameter */
/* Variables 0x60 to 0x65 and 0x69 are handled separately below */
case 0x66: { // Animation frame of nearby tile
TileIndex tile = this->tile;
if (parameter != 0) tile = GetNearbyTile(parameter, tile);
return this->st->TileBelongsToRailStation(tile) ? GetAnimationFrame(tile) : UINT_MAX;
}
case 0x67: { // Land info of nearby tile
Axis axis = GetRailStationAxis(this->tile);
TileIndex tile = this->tile;
if (parameter != 0) tile = GetNearbyTile(parameter, tile); // only perform if it is required
Slope tileh = GetTileSlope(tile);
bool swap = (axis == AXIS_Y && HasBit(tileh, CORNER_W) != HasBit(tileh, CORNER_E));
return GetNearbyTileInformation(tile, this->ro.grffile->grf_version >= 8) ^ (swap ? SLOPE_EW : 0);
}
case 0x68: { // Station info of nearby tiles
TileIndex nearby_tile = GetNearbyTile(parameter, this->tile);
if (!HasStationTileRail(nearby_tile)) return 0xFFFFFFFF;
uint32 grfid = this->st->speclist[GetCustomStationSpecIndex(this->tile)].grfid;
bool perpendicular = GetRailStationAxis(this->tile) != GetRailStationAxis(nearby_tile);
bool same_station = this->st->TileBelongsToRailStation(nearby_tile);
uint32 res = GB(GetStationGfx(nearby_tile), 1, 2) << 12 | !!perpendicular << 11 | !!same_station << 10;
if (IsCustomStationSpecIndex(nearby_tile)) {
const StationSpecList ssl = BaseStation::GetByTile(nearby_tile)->speclist[GetCustomStationSpecIndex(nearby_tile)];
res |= 1 << (ssl.grfid != grfid ? 9 : 8) | ssl.localidx;
}
return res;
}
/* General station variables */
case 0x82: return 50;
case 0x84: return this->st->string_id;
case 0x86: return 0;
case 0xF0: return this->st->facilities;
case 0xFA: return Clamp(this->st->build_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535);
}
return this->st->GetNewGRFVariable(this->ro, variable, parameter, available);
}
static uint32 StationGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
{
const BaseStation *st = object->u.station.st;
TileIndex tile = object->u.station.tile;
if (object->scope == VSG_SCOPE_PARENT) {
/* Pass the request on to the town of the station */
const Town *t;
if (st != NULL) {
t = st->town;
} else if (tile != INVALID_TILE) {
t = ClosestTownFromTile(tile, UINT_MAX);
} else {
*available = false;
return UINT_MAX;
}
return TownGetVariable(variable, parameter, available, t);
}
if (st == NULL) {
/* Station does not exist, so we're in a purchase list */
switch (variable) {
case 0x40:
case 0x41:
case 0x46:
case 0x47:
case 0x49: return 0x2110000; // Platforms, tracks & position
case 0x42: return 0; // Rail type (XXX Get current type from GUI?)
case 0x43: return _current_company; // Station owner
case 0x44: return 2; // PBS status
case 0xFA: return Clamp(_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Build date, clamped to a 16 bit value
}
*available = false;
return UINT_MAX;
}
switch (variable) {
/* Calculated station variables */
case 0x40:
if (!HasBit(_svc.valid, 0)) { _svc.v40 = GetPlatformInfoHelper(tile, false, false, false); SetBit(_svc.valid, 0); }
return _svc.v40;
case 0x41:
if (!HasBit(_svc.valid, 1)) { _svc.v41 = GetPlatformInfoHelper(tile, true, false, false); SetBit(_svc.valid, 1); }
return _svc.v41;
case 0x42: return GetTerrainType(tile) | (GetReverseRailTypeTranslation(GetRailType(tile), object->u.station.statspec->grf_prop.grffile) << 8);
case 0x43: return st->owner; // Station owner
case 0x44: return HasStationReservation(tile) ? 7 : 4; // PBS status
case 0x45:
if (!HasBit(_svc.valid, 2)) { _svc.v45 = GetRailContinuationInfo(tile); SetBit(_svc.valid, 2); }
return _svc.v45;
case 0x46:
if (!HasBit(_svc.valid, 3)) { _svc.v46 = GetPlatformInfoHelper(tile, false, false, true); SetBit(_svc.valid, 3); }
return _svc.v46;
case 0x47:
if (!HasBit(_svc.valid, 4)) { _svc.v47 = GetPlatformInfoHelper(tile, true, false, true); SetBit(_svc.valid, 4); }
return _svc.v47;
case 0x49:
if (!HasBit(_svc.valid, 5)) { _svc.v49 = GetPlatformInfoHelper(tile, false, true, false); SetBit(_svc.valid, 5); }
return _svc.v49;
case 0x4A: // Animation frame of tile
return GetAnimationFrame(tile);
/* Variables which use the parameter */
/* Variables 0x60 to 0x65 are handled separately below */
case 0x66: // Animation frame of nearby tile
if (parameter != 0) tile = GetNearbyTile(parameter, tile);
return st->TileBelongsToRailStation(tile) ? GetAnimationFrame(tile) : UINT_MAX;
case 0x67: { // Land info of nearby tile
Axis axis = GetRailStationAxis(tile);
if (parameter != 0) tile = GetNearbyTile(parameter, tile); // only perform if it is required
Slope tileh = GetTileSlope(tile, NULL);
bool swap = (axis == AXIS_Y && HasBit(tileh, CORNER_W) != HasBit(tileh, CORNER_E));
return GetNearbyTileInformation(tile) ^ (swap ? SLOPE_EW : 0);
}
case 0x68: { // Station info of nearby tiles
TileIndex nearby_tile = GetNearbyTile(parameter, tile);
if (!HasStationTileRail(nearby_tile)) return 0xFFFFFFFF;
uint32 grfid = st->speclist[GetCustomStationSpecIndex(tile)].grfid;
bool perpendicular = GetRailStationAxis(tile) != GetRailStationAxis(nearby_tile);
bool same_station = st->TileBelongsToRailStation(nearby_tile);
uint32 res = GB(GetStationGfx(nearby_tile), 1, 2) << 12 | !!perpendicular << 11 | !!same_station << 10;
if (IsCustomStationSpecIndex(nearby_tile)) {
const StationSpecList ssl = BaseStation::GetByTile(nearby_tile)->speclist[GetCustomStationSpecIndex(nearby_tile)];
res |= 1 << (ssl.grfid != grfid ? 9 : 8) | ssl.localidx;
}
return res;
}
/* General station variables */
case 0x82: return 50;
case 0x84: return st->string_id;
case 0x86: return 0;
case 0xF0: return st->facilities;
case 0xFA: return Clamp(st->build_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535);
}
return st->GetNewGRFVariable(object, variable, parameter, available);
}