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@ -120,19 +120,55 @@ static Waypoint *FindDeletedWaypointCloseTo(TileIndex tile, StringID str)
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return best;
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}
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/**
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* Get the axis for a new waypoint. This means that if it is a valid
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* tile to build a waypoint on it returns a valid Axis, otherwise an
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* invalid one.
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* @param tile the tile to look at.
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* @return the axis for the to-be-build waypoint.
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*/
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Axis GetAxisForNewWaypoint(TileIndex tile)
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{
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/* The axis for rail waypoints is easy. */
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if (IsRailWaypointTile(tile)) return GetRailStationAxis(tile);
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/* Non-plain rail type, no valid axis for waypoints. */
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if (!IsTileType(tile, MP_RAILWAY) || GetRailTileType(tile) != RAIL_TILE_NORMAL) return INVALID_AXIS;
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switch (GetTrackBits(tile)) {
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case TRACK_BIT_X: return AXIS_X;
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case TRACK_BIT_Y: return AXIS_Y;
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default: return INVALID_AXIS;
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}
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}
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CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags);
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/**
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* Check whether the given tile is suitable for a waypoint.
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* @param tile the tile to check for suitability
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* @param axis the axis of the waypoint
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*/
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static CommandCost IsValidTileForWaypoint(TileIndex tile, Axis axis)
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static CommandCost IsValidTileForWaypoint(TileIndex tile, Axis axis, StationID *waypoint)
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{
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if (!IsTileType(tile, MP_RAILWAY) ||
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GetRailTileType(tile) != RAIL_TILE_NORMAL ||
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GetTrackBits(tile) != AxisToTrackBits(axis)) {
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return_cmd_error(STR_ERROR_NO_SUITABLE_RAILROAD_TRACK);
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/* if waypoint is set, then we have special handling to allow building on top of already existing waypoints.
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* so waypoint points to INVALID_STATION if we can build on any waypoint.
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* Or it points to a waypoint if we're only allowed to build on exactly that waypoint. */
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if (waypoint != NULL && IsTileType(tile, MP_STATION)) {
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if (!IsRailWaypoint(tile)) {
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return ClearTile_Station(tile, DC_AUTO); // get error message
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} else {
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StationID wp = GetStationIndex(tile);
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if (*waypoint == INVALID_STATION) {
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*waypoint = wp;
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} else if (*waypoint != wp) {
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return_cmd_error(STR_ERROR_WAYPOINT_ADJOINS_MORE_THAN_ONE_EXISTING);
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}
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}
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}
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if (GetAxisForNewWaypoint(tile) != axis) return_cmd_error(STR_ERROR_NO_SUITABLE_RAILROAD_TRACK);
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Owner owner = GetTileOwner(tile);
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if (!CheckOwnership(owner)) return CMD_ERROR;
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if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
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@ -149,6 +185,8 @@ static CommandCost IsValidTileForWaypoint(TileIndex tile, Axis axis)
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}
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extern void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec);
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extern CommandCost FindJoiningWaypoint(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, Waypoint **wp);
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extern bool CanExpandRailStation(const BaseStation *st, TileArea &new_ta, Axis axis);
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/** Convert existing rail to waypoint. Eg build a waypoint station over
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* piece of rail
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@ -158,6 +196,7 @@ extern void GetStationLayout(byte *layout, int numtracks, int plat_len, const St
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* - p1 = (bit 4) - orientation (Axis)
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* - p1 = (bit 8-15) - width of waypoint
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* - p1 = (bit 16-23) - height of waypoint
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* - p1 = (bit 24) - allow waypoints directly adjacent to other waypoints.
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* @param p2 various bitstuffed elements
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* - p2 = (bit 0- 7) - custom station class
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* - p2 = (bit 8-15) - custom station id
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@ -170,9 +209,11 @@ CommandCost CmdBuildRailWaypoint(TileIndex start_tile, DoCommandFlag flags, uint
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Axis axis = (Axis)GB(p1, 4, 1);
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byte width = GB(p1, 8, 8);
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byte height = GB(p1, 16, 8);
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bool adjacent = HasBit(p1, 24);
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StationClassID spec_class = (StationClassID)GB(p2, 0, 8);
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byte spec_index = GB(p2, 8, 8);
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StationID station_to_join = GB(p2, 16, 16);
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/* Check if the given station class is valid */
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if (spec_class != STAT_CLASS_WAYP) return CMD_ERROR;
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@ -184,18 +225,41 @@ CommandCost CmdBuildRailWaypoint(TileIndex start_tile, DoCommandFlag flags, uint
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if ((axis == AXIS_X ? width : height) != 1) return CMD_ERROR;
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if (count == 0 || count > _settings_game.station.station_spread) return CMD_ERROR;
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/* Temporary */
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if (station_to_join != INVALID_STATION) return CMD_ERROR;
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/* Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station) */
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StationID est = INVALID_STATION;
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/* Check whether the tiles we're building on are valid rail or not. */
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TileIndexDiff offset = TileOffsByDiagDir(AxisToDiagDir(OtherAxis(axis)));
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for (int i = 0; i < count; i++) {
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TileIndex tile = start_tile + i * offset;
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CommandCost ret = IsValidTileForWaypoint(tile, axis);
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CommandCost ret = IsValidTileForWaypoint(tile, axis, _settings_game.station.nonuniform_stations ? &est : NULL);
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if (ret.Failed()) return ret;
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}
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Waypoint *wp = NULL;
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TileArea new_location(TileArea(start_tile, width, height));
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CommandCost ret = FindJoiningWaypoint(est, station_to_join, adjacent, new_location, &wp);
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if (ret.Failed()) return ret;
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/* Check if there is an already existing, deleted, waypoint close to us that we can reuse. */
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TileIndex center_tile = start_tile + (count / 2) * offset;
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Waypoint *wp = FindDeletedWaypointCloseTo(center_tile, STR_SV_STNAME_WAYPOINT);
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if (wp == NULL && !Waypoint::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
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if (wp == NULL) wp = FindDeletedWaypointCloseTo(center_tile, STR_SV_STNAME_WAYPOINT);
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if (wp != NULL) {
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/* Reuse an existing station. */
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if (wp->owner != _current_company) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_WAYPOINT);
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/* check if we want to expanding an already existing station? */
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if (wp->train_station.tile != INVALID_TILE && !CanExpandRailStation(wp, new_location, axis)) return CMD_ERROR;
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if (!wp->rect.BeforeAddRect(start_tile, width, height, StationRect::ADD_TEST)) return CMD_ERROR;
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} else {
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/* allocate and initialize new station */
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if (!Waypoint::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
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}
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if (flags & DC_EXEC) {
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if (wp == NULL) {
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@ -213,9 +277,7 @@ CommandCost CmdBuildRailWaypoint(TileIndex start_tile, DoCommandFlag flags, uint
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wp->facilities |= FACIL_TRAIN;
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wp->build_date = _date;
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wp->string_id = STR_SV_STNAME_WAYPOINT;
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wp->train_station.tile = start_tile;
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wp->train_station.w = width;
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wp->train_station.h = height;
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wp->train_station = new_location;
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if (wp->town == NULL) MakeDefaultWaypointName(wp);
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@ -234,12 +296,16 @@ CommandCost CmdBuildRailWaypoint(TileIndex start_tile, DoCommandFlag flags, uint
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for (int i = 0; i < count; i++) {
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TileIndex tile = start_tile + i * offset;
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bool reserved = HasBit(GetRailReservationTrackBits(tile), AxisToTrack(axis));
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byte old_specindex = IsTileType(tile, MP_STATION) ? GetCustomStationSpecIndex(tile) : 0;
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bool reserved = IsTileType(tile, MP_RAILWAY) ?
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HasBit(GetRailReservationTrackBits(tile), AxisToTrack(axis)) :
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HasStationReservation(tile);
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MakeRailWaypoint(tile, wp->owner, wp->index, axis, layout_ptr[i], GetRailType(tile));
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SetCustomStationSpecIndex(tile, map_spec_index);
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SetRailStationReservation(tile, reserved);
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MarkTileDirtyByTile(tile);
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DeallocateSpecFromStation(wp, old_specindex);
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YapfNotifyTrackLayoutChange(tile, AxisToTrack(axis));
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}
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}
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rubidium
15 years ago