ai_marine.cpp

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00001 /* $Id: ai_marine.cpp 20632 2010-08-26 22:01:16Z 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 
00017 
00018 /* static */ bool AIMarine::IsWaterDepotTile(TileIndex tile)
00019 {
00020   if (!::IsValidTile(tile)) return false;
00021 
00022   return ::IsTileType(tile, MP_WATER) && ::GetWaterTileType(tile) == WATER_TILE_DEPOT;
00023 }
00024 
00025 /* static */ bool AIMarine::IsDockTile(TileIndex tile)
00026 {
00027   if (!::IsValidTile(tile)) return false;
00028 
00029   return ::IsTileType(tile, MP_STATION) && ::IsDock(tile);
00030 }
00031 
00032 /* static */ bool AIMarine::IsBuoyTile(TileIndex tile)
00033 {
00034   if (!::IsValidTile(tile)) return false;
00035 
00036   return ::IsTileType(tile, MP_STATION) && ::IsBuoy(tile);
00037 }
00038 
00039 /* static */ bool AIMarine::IsLockTile(TileIndex tile)
00040 {
00041   if (!::IsValidTile(tile)) return false;
00042 
00043   return ::IsTileType(tile, MP_WATER) && ::GetWaterTileType(tile) == WATER_TILE_LOCK;
00044 }
00045 
00046 /* static */ bool AIMarine::IsCanalTile(TileIndex tile)
00047 {
00048   if (!::IsValidTile(tile)) return false;
00049 
00050   return ::IsTileType(tile, MP_WATER) && ::IsCanal(tile);
00051 }
00052 
00053 /* static */ bool AIMarine::AreWaterTilesConnected(TileIndex t1, TileIndex t2)
00054 {
00055   if (!::IsValidTile(t1)) return false;
00056   if (!::IsValidTile(t2)) return false;
00057 
00058   /* Tiles not neighbouring */
00059   if (::DistanceManhattan(t1, t2) != 1) return false;
00060 
00061   DiagDirection to_other_tile = ::DiagdirBetweenTiles(t2, t1);
00062 
00063   /* Determine the reachable tracks from the shared edge */
00064   TrackBits gtts1 = ::TrackStatusToTrackBits(::GetTileTrackStatus(t1, TRANSPORT_WATER, 0, to_other_tile)) & ::DiagdirReachesTracks(to_other_tile);
00065   if (gtts1 == TRACK_BIT_NONE) return false;
00066 
00067   to_other_tile = ReverseDiagDir(to_other_tile);
00068   TrackBits gtts2 = ::TrackStatusToTrackBits(::GetTileTrackStatus(t2, TRANSPORT_WATER, 0, to_other_tile)) & ::DiagdirReachesTracks(to_other_tile);
00069 
00070   return gtts2 != TRACK_BIT_NONE;
00071 }
00072 
00073 /* static */ bool AIMarine::BuildWaterDepot(TileIndex tile, TileIndex front)
00074 {
00075   EnforcePrecondition(false, ::IsValidTile(tile));
00076   EnforcePrecondition(false, ::IsValidTile(front));
00077   EnforcePrecondition(false, (::TileX(front) == ::TileX(tile)) != (::TileY(front) == ::TileY(tile)));
00078 
00079   return AIObject::DoCommand(tile, ::TileX(front) == ::TileX(tile), 0, CMD_BUILD_SHIP_DEPOT);
00080 }
00081 
00082 /* static */ bool AIMarine::BuildDock(TileIndex tile, StationID station_id)
00083 {
00084   EnforcePrecondition(false, ::IsValidTile(tile));
00085   EnforcePrecondition(false, station_id == AIStation::STATION_NEW || station_id == AIStation::STATION_JOIN_ADJACENT || AIStation::IsValidStation(station_id));
00086 
00087   uint p1 = station_id == AIStation::STATION_JOIN_ADJACENT ? 0 : 1;
00088   uint p2 = (AIStation::IsValidStation(station_id) ? station_id : INVALID_STATION) << 16;
00089   return AIObject::DoCommand(tile, p1, p2, CMD_BUILD_DOCK);
00090 }
00091 
00092 /* static */ bool AIMarine::BuildBuoy(TileIndex tile)
00093 {
00094   EnforcePrecondition(false, ::IsValidTile(tile));
00095 
00096   return AIObject::DoCommand(tile, 0, 0, CMD_BUILD_BUOY);
00097 }
00098 
00099 /* static */ bool AIMarine::BuildLock(TileIndex tile)
00100 {
00101   EnforcePrecondition(false, ::IsValidTile(tile));
00102 
00103   return AIObject::DoCommand(tile, 0, 0, CMD_BUILD_LOCK);
00104 }
00105 
00106 /* static */ bool AIMarine::BuildCanal(TileIndex tile)
00107 {
00108   EnforcePrecondition(false, ::IsValidTile(tile));
00109 
00110   return AIObject::DoCommand(tile, tile, WATER_CLASS_CANAL, CMD_BUILD_CANAL);
00111 }
00112 
00113 /* static */ bool AIMarine::RemoveWaterDepot(TileIndex tile)
00114 {
00115   EnforcePrecondition(false, ::IsValidTile(tile));
00116   EnforcePrecondition(false, IsWaterDepotTile(tile));
00117 
00118   return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
00119 }
00120 
00121 /* static */ bool AIMarine::RemoveDock(TileIndex tile)
00122 {
00123   EnforcePrecondition(false, ::IsValidTile(tile));
00124   EnforcePrecondition(false, IsDockTile(tile));
00125 
00126   return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
00127 }
00128 
00129 /* static */ bool AIMarine::RemoveBuoy(TileIndex tile)
00130 {
00131   EnforcePrecondition(false, ::IsValidTile(tile));
00132   EnforcePrecondition(false, IsBuoyTile(tile));
00133 
00134   return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
00135 }
00136 
00137 /* static */ bool AIMarine::RemoveLock(TileIndex tile)
00138 {
00139   EnforcePrecondition(false, ::IsValidTile(tile));
00140   EnforcePrecondition(false, IsLockTile(tile));
00141 
00142   return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
00143 }
00144 
00145 /* static */ bool AIMarine::RemoveCanal(TileIndex tile)
00146 {
00147   EnforcePrecondition(false, ::IsValidTile(tile));
00148   EnforcePrecondition(false, IsCanalTile(tile));
00149 
00150   return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
00151 }
00152 
00153 /* static */ Money AIMarine::GetBuildCost(BuildType build_type)
00154 {
00155   switch (build_type) {
00156     case BT_DOCK:  return ::GetPrice(PR_BUILD_STATION_DOCK, 1, NULL);
00157     case BT_DEPOT: return ::GetPrice(PR_BUILD_DEPOT_SHIP, 1, NULL);
00158     case BT_BUOY:  return ::GetPrice(PR_BUILD_WAYPOINT_BUOY, 1, NULL);
00159     default: return -1;
00160   }
00161 }

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