ai_tile.cpp

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00001 /* $Id: ai_tile.cpp 17693 2009-10-04 17:16:41Z 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_tile.hpp"
00013 #include "ai_map.hpp"
00014 #include "ai_town.hpp"
00015 #include "../../station_func.h"
00016 #include "../../company_func.h"
00017 #include "../../road_map.h"
00018 #include "../../water_map.h"
00019 #include "../../clear_map.h"
00020 #include "../../town.h"
00021 #include "../../landscape.h"
00022 
00023 /* static */ bool AITile::IsBuildable(TileIndex tile)
00024 {
00025   if (!::IsValidTile(tile)) return false;
00026 
00027   switch (::GetTileType(tile)) {
00028     default: return false;
00029     case MP_CLEAR: return true;
00030     case MP_TREES: return true;
00031     case MP_WATER: return IsCoast(tile);
00032     case MP_ROAD:
00033       /* Tram bits aren't considered buildable */
00034       if (::GetRoadTypes(tile) != ROADTYPES_ROAD) return false;
00035       /* Depots and crossings aren't considered buildable */
00036       if (::GetRoadTileType(tile) != ROAD_TILE_NORMAL) return false;
00037       if (CountBits(::GetRoadBits(tile, ROADTYPE_ROAD)) != 1) return false;
00038       if (::IsRoadOwner(tile, ROADTYPE_ROAD, OWNER_TOWN)) return true;
00039       if (::IsRoadOwner(tile, ROADTYPE_ROAD, _current_company)) return true;
00040       return false;
00041   }
00042 }
00043 
00044 /* static */ bool AITile::IsBuildableRectangle(TileIndex tile, uint width, uint height)
00045 {
00046   uint tx, ty;
00047 
00048   tx = AIMap::GetTileX(tile);
00049   ty = AIMap::GetTileY(tile);
00050 
00051   for (uint x = tx; x < width + tx; x++) {
00052     for (uint y = ty; y < height + ty; y++) {
00053       if (!IsBuildable(AIMap::GetTileIndex(x, y))) return false;
00054     }
00055   }
00056 
00057   return true;
00058 }
00059 
00060 /* static */ bool AITile::IsWaterTile(TileIndex tile)
00061 {
00062   if (!::IsValidTile(tile)) return false;
00063 
00064   return ::IsTileType(tile, MP_WATER) && !::IsCoast(tile);
00065 }
00066 
00067 /* static */ bool AITile::IsCoastTile(TileIndex tile)
00068 {
00069   if (!::IsValidTile(tile)) return false;
00070 
00071   return ::IsTileType(tile, MP_WATER) && ::IsCoast(tile);
00072 }
00073 
00074 /* static */ bool AITile::IsStationTile(TileIndex tile)
00075 {
00076   if (!::IsValidTile(tile)) return false;
00077 
00078   return ::IsTileType(tile, MP_STATION);
00079 }
00080 
00081 /* static */ bool AITile::IsSteepSlope(Slope slope)
00082 {
00083   if ((slope & ~(SLOPE_ELEVATED | SLOPE_STEEP | SLOPE_HALFTILE_MASK)) != 0) return false;
00084 
00085   return ::IsSteepSlope((::Slope)slope);
00086 }
00087 
00088 /* static */ bool AITile::IsHalftileSlope(Slope slope)
00089 {
00090   if ((slope & ~(SLOPE_ELEVATED | SLOPE_STEEP | SLOPE_HALFTILE_MASK)) != 0) return false;
00091 
00092   return ::IsHalftileSlope((::Slope)slope);
00093 }
00094 
00095 /* static */ bool AITile::HasTreeOnTile(TileIndex tile)
00096 {
00097   if (!::IsValidTile(tile)) return false;
00098 
00099   return ::IsTileType(tile, MP_TREES);
00100 }
00101 
00102 /* static */ bool AITile::IsFarmTile(TileIndex tile)
00103 {
00104   if (!::IsValidTile(tile)) return false;
00105 
00106   return (::IsTileType(tile, MP_CLEAR) && ::IsClearGround(tile, CLEAR_FIELDS));
00107 }
00108 
00109 /* static */ bool AITile::IsRockTile(TileIndex tile)
00110 {
00111   if (!::IsValidTile(tile)) return false;
00112 
00113   return (::IsTileType(tile, MP_CLEAR) && ::IsClearGround(tile, CLEAR_ROCKS));
00114 }
00115 
00116 /* static */ bool AITile::IsRoughTile(TileIndex tile)
00117 {
00118   if (!::IsValidTile(tile)) return false;
00119 
00120   return (::IsTileType(tile, MP_CLEAR) && ::IsClearGround(tile, CLEAR_ROUGH));
00121 }
00122 
00123 /* static */ bool AITile::IsSnowTile(TileIndex tile)
00124 {
00125   if (!::IsValidTile(tile)) return false;
00126 
00127   return (::IsTileType(tile, MP_CLEAR) && ::IsClearGround(tile, CLEAR_SNOW));
00128 }
00129 
00130 /* static */ bool AITile::IsDesertTile(TileIndex tile)
00131 {
00132   if (!::IsValidTile(tile)) return false;
00133 
00134   return (::IsTileType(tile, MP_CLEAR) && ::IsClearGround(tile, CLEAR_DESERT));
00135 }
00136 
00137 /* static */ AITile::Slope AITile::GetSlope(TileIndex tile)
00138 {
00139   if (!::IsValidTile(tile)) return SLOPE_INVALID;
00140 
00141   return (Slope)::GetTileSlope(tile, NULL);
00142 }
00143 
00144 /* static */ AITile::Slope AITile::GetComplementSlope(Slope slope)
00145 {
00146   if ((slope & ~SLOPE_ELEVATED) != 0) return SLOPE_INVALID;
00147 
00148   return (Slope)::ComplementSlope((::Slope)slope);
00149 }
00150 
00151 /* static */ int32 AITile::GetMinHeight(TileIndex tile)
00152 {
00153   if (!::IsValidTile(tile)) return -1;
00154 
00155   return ::GetTileZ(tile) / ::TILE_HEIGHT;
00156 }
00157 
00158 /* static */ int32 AITile::GetMaxHeight(TileIndex tile)
00159 {
00160   if (!::IsValidTile(tile)) return -1;
00161 
00162   return ::GetTileMaxZ(tile) / ::TILE_HEIGHT;
00163 }
00164 
00165 /* static */ int32 AITile::GetCornerHeight(TileIndex tile, Corner corner)
00166 {
00167   if (!::IsValidTile(tile) || !::IsValidCorner((::Corner)corner)) return -1;
00168 
00169   uint z;
00170 	::Slope slope = ::GetTileSlope(tile, &z);
00171   return (z + ::GetSlopeZInCorner(slope, (::Corner)corner)) / ::TILE_HEIGHT;
00172 }
00173 
00174 /* static */ AICompany::CompanyID AITile::GetOwner(TileIndex tile)
00175 {
00176   if (!::IsValidTile(tile)) return AICompany::COMPANY_INVALID;
00177   if (::IsTileType(tile, MP_HOUSE)) return AICompany::COMPANY_INVALID;
00178   if (::IsTileType(tile, MP_INDUSTRY)) return AICompany::COMPANY_INVALID;
00179 
00180   return AICompany::ResolveCompanyID((AICompany::CompanyID)(byte)::GetTileOwner(tile));
00181 }
00182 
00183 /* static */ bool AITile::HasTransportType(TileIndex tile, TransportType transport_type)
00184 {
00185   if (!::IsValidTile(tile)) return false;
00186 
00187   return ::TrackStatusToTrackdirBits(::GetTileTrackStatus(tile, (::TransportType)transport_type, UINT32_MAX)) != TRACKDIR_BIT_NONE;
00188 }
00189 
00190 /* static */ int32 AITile::GetCargoAcceptance(TileIndex tile, CargoID cargo_type, int width, int height, int radius)
00191 {
00192   if (!::IsValidTile(tile) || width <= 0 || height <= 0 || radius < 0) return -1;
00193 
00194   CargoArray acceptance = ::GetAcceptanceAroundTiles(tile, width, height, _settings_game.station.modified_catchment ? radius : (int)CA_UNMODIFIED);
00195   return acceptance[cargo_type];
00196 }
00197 
00198 /* static */ int32 AITile::GetCargoProduction(TileIndex tile, CargoID cargo_type, int width, int height, int radius)
00199 {
00200   if (!::IsValidTile(tile) || width <= 0 || height <= 0 || radius < 0) return -1;
00201 
00202   CargoArray produced = ::GetProductionAroundTiles(tile, width, height, _settings_game.station.modified_catchment ? radius : (int)CA_UNMODIFIED);
00203   return produced[cargo_type];
00204 }
00205 
00206 /* static */ int32 AITile::GetDistanceManhattanToTile(TileIndex tile_from, TileIndex tile_to)
00207 {
00208   return AIMap::DistanceManhattan(tile_from, tile_to);
00209 }
00210 
00211 /* static */ int32 AITile::GetDistanceSquareToTile(TileIndex tile_from, TileIndex tile_to)
00212 {
00213   return AIMap::DistanceSquare(tile_from, tile_to);
00214 }
00215 
00216 /* static */ bool AITile::RaiseTile(TileIndex tile, int32 slope)
00217 {
00218   EnforcePrecondition(false, tile < ::MapSize());
00219 
00220   return AIObject::DoCommand(tile, slope, 1, CMD_TERRAFORM_LAND);
00221 }
00222 
00223 /* static */ bool AITile::LowerTile(TileIndex tile, int32 slope)
00224 {
00225   EnforcePrecondition(false, tile < ::MapSize());
00226 
00227   return AIObject::DoCommand(tile, slope, 0, CMD_TERRAFORM_LAND);
00228 }
00229 
00230 /* static */ bool AITile::LevelTiles(TileIndex start_tile, TileIndex end_tile)
00231 {
00232   EnforcePrecondition(false, start_tile < ::MapSize());
00233   EnforcePrecondition(false, end_tile < ::MapSize());
00234 
00235   return AIObject::DoCommand(end_tile, start_tile, 0, CMD_LEVEL_LAND);
00236 }
00237 
00238 /* static */ bool AITile::DemolishTile(TileIndex tile)
00239 {
00240   EnforcePrecondition(false, ::IsValidTile(tile));
00241 
00242   return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
00243 }
00244 
00245 /* static */ bool AITile::PlantTree(TileIndex tile)
00246 {
00247   EnforcePrecondition(false, ::IsValidTile(tile));
00248 
00249   return AIObject::DoCommand(tile, UINT_MAX, tile, CMD_PLANT_TREE);
00250 }
00251 
00252 /* static */ bool AITile::PlantTreeRectangle(TileIndex tile, uint width, uint height)
00253 {
00254   EnforcePrecondition(false, ::IsValidTile(tile));
00255   EnforcePrecondition(false, width >= 1 && width <= 20);
00256   EnforcePrecondition(false, height >= 1 && height <= 20);
00257   TileIndex end_tile = tile + ::TileDiffXY(width - 1, height - 1);
00258 
00259   return AIObject::DoCommand(tile, UINT_MAX, end_tile, CMD_PLANT_TREE);
00260 }
00261 
00262 /* static */ bool AITile::IsWithinTownInfluence(TileIndex tile, TownID town_id)
00263 {
00264   return AITown::IsWithinTownInfluence(town_id, tile);
00265 }
00266 
00267 /* static */ TownID AITile::GetClosestTown(TileIndex tile)
00268 {
00269   if (!::IsValidTile(tile)) return INVALID_TOWN;
00270 
00271   return ::ClosestTownFromTile(tile, UINT_MAX)->index;
00272 }

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