ai_marine.cpp

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00001 /* $Id: ai_marine.cpp 20494 2010-08-14 18:01:55Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "ai_marine.hpp"
00013 #include "ai_station.hpp"
00014 #include "../../station_base.h"
00015 #include "../../tile_cmd.h"
00016 #include "../../economy_func.h"
00017 
00018 
00019 /* static */ bool AIMarine::IsWaterDepotTile(TileIndex tile)
00020 {
00021   if (!::IsValidTile(tile)) return false;
00022 
00023   return ::IsTileType(tile, MP_WATER) && ::GetWaterTileType(tile) == WATER_TILE_DEPOT;
00024 }
00025 
00026 /* static */ bool AIMarine::IsDockTile(TileIndex tile)
00027 {
00028   if (!::IsValidTile(tile)) return false;
00029 
00030   return ::IsTileType(tile, MP_STATION) && ::IsDock(tile);
00031 }
00032 
00033 /* static */ bool AIMarine::IsBuoyTile(TileIndex tile)
00034 {
00035   if (!::IsValidTile(tile)) return false;
00036 
00037   return ::IsTileType(tile, MP_STATION) && ::IsBuoy(tile);
00038 }
00039 
00040 /* static */ bool AIMarine::IsLockTile(TileIndex tile)
00041 {
00042   if (!::IsValidTile(tile)) return false;
00043 
00044   return ::IsTileType(tile, MP_WATER) && ::GetWaterTileType(tile) == WATER_TILE_LOCK;
00045 }
00046 
00047 /* static */ bool AIMarine::IsCanalTile(TileIndex tile)
00048 {
00049   if (!::IsValidTile(tile)) return false;
00050 
00051   return ::IsTileType(tile, MP_WATER) && ::IsCanal(tile);
00052 }
00053 
00054 /* static */ bool AIMarine::AreWaterTilesConnected(TileIndex t1, TileIndex t2)
00055 {
00056   if (!::IsValidTile(t1)) return false;
00057   if (!::IsValidTile(t2)) return false;
00058 
00059   /* Tiles not neighbouring */
00060   if (::DistanceManhattan(t1, t2) != 1) return false;
00061 
00062   DiagDirection to_other_tile = ::DiagdirBetweenTiles(t2, t1);
00063 
00064   /* Determine the reachable tracks from the shared edge */
00065   TrackBits gtts1 = ::TrackStatusToTrackBits(::GetTileTrackStatus(t1, TRANSPORT_WATER, 0, to_other_tile)) & ::DiagdirReachesTracks(to_other_tile);
00066   if (gtts1 == TRACK_BIT_NONE) return false;
00067 
00068   to_other_tile = ReverseDiagDir(to_other_tile);
00069   TrackBits gtts2 = ::TrackStatusToTrackBits(::GetTileTrackStatus(t2, TRANSPORT_WATER, 0, to_other_tile)) & ::DiagdirReachesTracks(to_other_tile);
00070 
00071   return gtts2 != TRACK_BIT_NONE;
00072 }
00073 
00074 /* static */ bool AIMarine::BuildWaterDepot(TileIndex tile, TileIndex front)
00075 {
00076   EnforcePrecondition(false, ::IsValidTile(tile));
00077   EnforcePrecondition(false, ::IsValidTile(front));
00078   EnforcePrecondition(false, (::TileX(front) == ::TileX(tile)) != (::TileY(front) == ::TileY(tile)));
00079 
00080   return AIObject::DoCommand(tile, ::TileX(front) == ::TileX(tile), 0, CMD_BUILD_SHIP_DEPOT);
00081 }
00082 
00083 /* static */ bool AIMarine::BuildDock(TileIndex tile, StationID station_id)
00084 {
00085   EnforcePrecondition(false, ::IsValidTile(tile));
00086   EnforcePrecondition(false, station_id == AIStation::STATION_NEW || station_id == AIStation::STATION_JOIN_ADJACENT || AIStation::IsValidStation(station_id));
00087 
00088   uint p1 = station_id == AIStation::STATION_JOIN_ADJACENT ? 0 : 1;
00089   uint p2 = (AIStation::IsValidStation(station_id) ? station_id : INVALID_STATION) << 16;
00090   return AIObject::DoCommand(tile, p1, p2, CMD_BUILD_DOCK);
00091 }
00092 
00093 /* static */ bool AIMarine::BuildBuoy(TileIndex tile)
00094 {
00095   EnforcePrecondition(false, ::IsValidTile(tile));
00096 
00097   return AIObject::DoCommand(tile, 0, 0, CMD_BUILD_BUOY);
00098 }
00099 
00100 /* static */ bool AIMarine::BuildLock(TileIndex tile)
00101 {
00102   EnforcePrecondition(false, ::IsValidTile(tile));
00103 
00104   return AIObject::DoCommand(tile, 0, 0, CMD_BUILD_LOCK);
00105 }
00106 
00107 /* static */ bool AIMarine::BuildCanal(TileIndex tile)
00108 {
00109   EnforcePrecondition(false, ::IsValidTile(tile));
00110 
00111   return AIObject::DoCommand(tile, tile, 0, CMD_BUILD_CANAL);
00112 }
00113 
00114 /* static */ bool AIMarine::RemoveWaterDepot(TileIndex tile)
00115 {
00116   EnforcePrecondition(false, ::IsValidTile(tile));
00117   EnforcePrecondition(false, IsWaterDepotTile(tile));
00118 
00119   return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
00120 }
00121 
00122 /* static */ bool AIMarine::RemoveDock(TileIndex tile)
00123 {
00124   EnforcePrecondition(false, ::IsValidTile(tile));
00125   EnforcePrecondition(false, IsDockTile(tile));
00126 
00127   return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
00128 }
00129 
00130 /* static */ bool AIMarine::RemoveBuoy(TileIndex tile)
00131 {
00132   EnforcePrecondition(false, ::IsValidTile(tile));
00133   EnforcePrecondition(false, IsBuoyTile(tile));
00134 
00135   return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
00136 }
00137 
00138 /* static */ bool AIMarine::RemoveLock(TileIndex tile)
00139 {
00140   EnforcePrecondition(false, ::IsValidTile(tile));
00141   EnforcePrecondition(false, IsLockTile(tile));
00142 
00143   return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
00144 }
00145 
00146 /* static */ bool AIMarine::RemoveCanal(TileIndex tile)
00147 {
00148   EnforcePrecondition(false, ::IsValidTile(tile));
00149   EnforcePrecondition(false, IsCanalTile(tile));
00150 
00151   return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
00152 }
00153 
00154 /* static */ Money AIMarine::GetBuildCost(BuildType build_type)
00155 {
00156   switch (build_type) {
00157     case BT_DOCK:  return ::GetPrice(PR_BUILD_STATION_DOCK, 1, NULL);
00158     case BT_DEPOT: return ::GetPrice(PR_BUILD_DEPOT_SHIP, 1, NULL);
00159     case BT_BUOY:  return ::GetPrice(PR_BUILD_WAYPOINT_BUOY, 1, NULL);
00160     default: return -1;
00161   }
00162 }

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