# ai_station.cpp

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    00001 /* $Id: ai_station.cpp 16531 2009-06-07 15:26:33Z rubidium $ */
    00002
    00005 #include "ai_station.hpp"
    00006 #include "ai_cargo.hpp"
    00007 #include "ai_map.hpp"
    00008 #include "ai_town.hpp"
    00009 #include "../../command_func.h"
    00010 #include "../../debug.h"
    00011 #include "../../station_map.h"
    00012 #include "../../string_func.h"
    00013 #include "../../strings_func.h"
    00014 #include "../../company_func.h"
    00015 #include "../../town.h"
    00016 #include "table/strings.h"
    00017
    00018 /* static */ bool AIStation::IsValidStation(StationID station_id)
    00019 {
    00020   const Station *st = ::IsValidStationID(station_id) ? GetStation(station_id) : NULL;
    00021   return st != NULL && (st->owner == _current_company || st->owner == OWNER_NONE);
    00022 }
    00023
    00024 /* static */ StationID AIStation::GetStationID(TileIndex tile)
    00025 {
    00026   if (!::IsValidTile(tile) || !::IsTileType(tile, MP_STATION)) return INVALID_STATION;
    00027   return ::GetStationIndex(tile);
    00028 }
    00029
    00030 /* static */ char *AIStation::GetName(StationID station_id)
    00031 {
    00032   if (!IsValidStation(station_id)) return NULL;
    00033
    00034   static const int len = 64;
    00035   char *station_name = MallocT<char>(len);
    00036
    00037   ::SetDParam(0, GetStation(station_id)->index);
    00038   ::GetString(station_name, STR_STATION, &station_name[len - 1]);
    00039   return station_name;
    00040 }
    00041
    00042 /* static */ bool AIStation::SetName(StationID station_id, const char *name)
    00043 {
    00044   EnforcePrecondition(false, IsValidStation(station_id));
    00045   EnforcePrecondition(false, !::StrEmpty(name));
    00046   EnforcePreconditionCustomError(false, ::strlen(name) < MAX_LENGTH_STATION_NAME_BYTES, AIError::ERR_PRECONDITION_STRING_TOO_LONG);
    00047
    00048   return AIObject::DoCommand(0, station_id, 0, CMD_RENAME_STATION, name);
    00049 }
    00050
    00051 /* static */ TileIndex AIStation::GetLocation(StationID station_id)
    00052 {
    00053   if (!IsValidStation(station_id)) return INVALID_TILE;
    00054
    00055   return ::GetStation(station_id)->xy;
    00056 }
    00057
    00058 /* static */ int32 AIStation::GetCargoWaiting(StationID station_id, CargoID cargo_id)
    00059 {
    00060   if (!IsValidStation(station_id)) return -1;
    00061   if (!AICargo::IsValidCargo(cargo_id)) return -1;
    00062
    00063   return ::GetStation(station_id)->goods[cargo_id].cargo.Count();
    00064 }
    00065
    00066 /* static */ int32 AIStation::GetCargoRating(StationID station_id, CargoID cargo_id)
    00067 {
    00068   if (!IsValidStation(station_id)) return -1;
    00069   if (!AICargo::IsValidCargo(cargo_id)) return -1;
    00070
    00071   return ::GetStation(station_id)->goods[cargo_id].rating * 101 >> 8;
    00072 }
    00073
    00074 /* static */ int32 AIStation::GetCoverageRadius(AIStation::StationType station_type)
    00075 {
    00076   if (station_type == STATION_AIRPORT) {
    00077     DEBUG(ai, 0, "GetCoverageRadius(): coverage radius of airports needs to be requested via AIAirport::GetAirportCoverageRadius(), as it requires AirportType");
    00078     return -1;
    00079   }
    00080   if (CountBits(station_type) != 1) return -1;
    00081   if (!_settings_game.station.modified_catchment) return CA_UNMODIFIED;
    00082
    00083   switch (station_type) {
    00084     case STATION_TRAIN:      return CA_TRAIN;
    00085     case STATION_TRUCK_STOP: return CA_TRUCK;
    00086     case STATION_BUS_STOP:   return CA_BUS;
    00087     case STATION_DOCK:       return CA_DOCK;
    00088     default:                 return CA_NONE;
    00089   }
    00090 }
    00091
    00092 /* static */ int32 AIStation::GetDistanceManhattanToTile(StationID station_id, TileIndex tile)
    00093 {
    00094   if (!IsValidStation(station_id)) return -1;
    00095
    00096   return AIMap::DistanceManhattan(tile, GetLocation(station_id));
    00097 }
    00098
    00099 /* static */ int32 AIStation::GetDistanceSquareToTile(StationID station_id, TileIndex tile)
    00100 {
    00101   if (!IsValidStation(station_id)) return -1;
    00102
    00103   return AIMap::DistanceSquare(tile, GetLocation(station_id));
    00104 }
    00105
    00106 /* static */ bool AIStation::IsWithinTownInfluence(StationID station_id, TownID town_id)
    00107 {
    00108   if (!IsValidStation(station_id)) return false;
    00109
    00110   return AITown::IsWithinTownInfluence(town_id, GetLocation(station_id));
    00111 }
    00112
    00113 /* static */ bool AIStation::HasStationType(StationID station_id, StationType station_type)
    00114 {
    00115   if (!IsValidStation(station_id)) return false;
    00116   if (CountBits(station_type) != 1) return false;
    00117
    00118   return (::GetStation(station_id)->facilities & station_type) != 0;
    00119 }
    00120
    00121 /* static */ bool AIStation::HasRoadType(StationID station_id, AIRoad::RoadType road_type)
    00122 {
    00123   if (!IsValidStation(station_id)) return false;
    00124   if (!AIRoad::IsRoadTypeAvailable(road_type)) return false;
    00125
    00126 	::RoadTypes r = RoadTypeToRoadTypes((::RoadType)road_type);
    00127
    00128   for (const RoadStop *rs = ::GetStation(station_id)->GetPrimaryRoadStop(ROADSTOP_BUS); rs != NULL; rs = rs->next) {
    00129     if ((::GetRoadTypes(rs->xy) & r) != 0) return true;
    00130   }
    00131   for (const RoadStop *rs = ::GetStation(station_id)->GetPrimaryRoadStop(ROADSTOP_TRUCK); rs != NULL; rs = rs->next) {
    00132     if ((::GetRoadTypes(rs->xy) & r) != 0) return true;
    00133   }
    00134
    00135   return false;
    00136 }
    00137
    00138 /* static */ TownID AIStation::GetNearestTown(StationID station_id)
    00139 {
    00140   if (!IsValidStation(station_id)) return INVALID_TOWN;
    00141
    00142   return ::GetStation(station_id)->town->index;
    00143 }