clear_map.h

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00001 /* $Id: clear_map.h 25852 2013-10-12 22:23:43Z zuu $ */
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 #ifndef CLEAR_MAP_H
00013 #define CLEAR_MAP_H
00014 
00015 #include "bridge_map.h"
00016 #include "industry_type.h"
00017 
00021 enum ClearGround {
00022   CLEAR_GRASS  = 0, 
00023   CLEAR_ROUGH  = 1, 
00024   CLEAR_ROCKS  = 2, 
00025   CLEAR_FIELDS = 3, 
00026   CLEAR_SNOW   = 4, 
00027   CLEAR_DESERT = 5, 
00028 };
00029 
00030 
00037 static inline bool IsSnowTile(TileIndex t)
00038 {
00039   assert(IsTileType(t, MP_CLEAR));
00040   return HasBit(_m[t].m3, 4);
00041 }
00042 
00049 static inline ClearGround GetRawClearGround(TileIndex t)
00050 {
00051   assert(IsTileType(t, MP_CLEAR));
00052   return (ClearGround)GB(_m[t].m5, 2, 3);
00053 }
00054 
00061 static inline ClearGround GetClearGround(TileIndex t)
00062 {
00063   if (IsSnowTile(t)) return CLEAR_SNOW;
00064   return GetRawClearGround(t);
00065 }
00066 
00073 static inline bool IsClearGround(TileIndex t, ClearGround ct)
00074 {
00075   return GetClearGround(t) == ct;
00076 }
00077 
00078 
00085 static inline uint GetClearDensity(TileIndex t)
00086 {
00087   assert(IsTileType(t, MP_CLEAR));
00088   return GB(_m[t].m5, 0, 2);
00089 }
00090 
00097 static inline void AddClearDensity(TileIndex t, int d)
00098 {
00099   assert(IsTileType(t, MP_CLEAR)); // XXX incomplete
00100   _m[t].m5 += d;
00101 }
00102 
00109 static inline void SetClearDensity(TileIndex t, uint d)
00110 {
00111   assert(IsTileType(t, MP_CLEAR));
00112   SB(_m[t].m5, 0, 2, d);
00113 }
00114 
00115 
00122 static inline uint GetClearCounter(TileIndex t)
00123 {
00124   assert(IsTileType(t, MP_CLEAR));
00125   return GB(_m[t].m5, 5, 3);
00126 }
00127 
00134 static inline void AddClearCounter(TileIndex t, int c)
00135 {
00136   assert(IsTileType(t, MP_CLEAR)); // XXX incomplete
00137   _m[t].m5 += c << 5;
00138 }
00139 
00146 static inline void SetClearCounter(TileIndex t, uint c)
00147 {
00148   assert(IsTileType(t, MP_CLEAR)); // XXX incomplete
00149   SB(_m[t].m5, 5, 3, c);
00150 }
00151 
00152 
00160 static inline void SetClearGroundDensity(TileIndex t, ClearGround type, uint density)
00161 {
00162   assert(IsTileType(t, MP_CLEAR)); // XXX incomplete
00163   _m[t].m5 = 0 << 5 | type << 2 | density;
00164 }
00165 
00166 
00173 static inline uint GetFieldType(TileIndex t)
00174 {
00175   assert(GetClearGround(t) == CLEAR_FIELDS);
00176   return GB(_m[t].m3, 0, 4);
00177 }
00178 
00185 static inline void SetFieldType(TileIndex t, uint f)
00186 {
00187   assert(GetClearGround(t) == CLEAR_FIELDS); // XXX incomplete
00188   SB(_m[t].m3, 0, 4, f);
00189 }
00190 
00197 static inline IndustryID GetIndustryIndexOfField(TileIndex t)
00198 {
00199   assert(GetClearGround(t) == CLEAR_FIELDS);
00200   return(IndustryID) _m[t].m2;
00201 }
00202 
00209 static inline void SetIndustryIndexOfField(TileIndex t, IndustryID i)
00210 {
00211   assert(GetClearGround(t) == CLEAR_FIELDS);
00212   _m[t].m2 = i;
00213 }
00214 
00215 
00223 static inline uint GetFence(TileIndex t, DiagDirection side)
00224 {
00225   assert(IsClearGround(t, CLEAR_FIELDS));
00226   switch (side) {
00227     default: NOT_REACHED();
00228     case DIAGDIR_SE: return GB(_m[t].m4, 2, 3);
00229     case DIAGDIR_SW: return GB(_m[t].m4, 5, 3);
00230     case DIAGDIR_NE: return GB(_m[t].m3, 5, 3);
00231     case DIAGDIR_NW: return GB(_m[t].m6, 2, 3);
00232   }
00233 }
00234 
00242 static inline void SetFence(TileIndex t, DiagDirection side, uint h)
00243 {
00244   assert(IsClearGround(t, CLEAR_FIELDS));
00245   switch (side) {
00246     default: NOT_REACHED();
00247     case DIAGDIR_SE: SB(_m[t].m4, 2, 3, h); break;
00248     case DIAGDIR_SW: SB(_m[t].m4, 5, 3, h); break;
00249     case DIAGDIR_NE: SB(_m[t].m3, 5, 3, h); break;
00250     case DIAGDIR_NW: SB(_m[t].m6, 2, 3, h); break;
00251   }
00252 }
00253 
00254 
00261 static inline void MakeClear(TileIndex t, ClearGround g, uint density)
00262 {
00263   /* If this is a non-bridgeable tile, clear the bridge bits while the rest
00264    * of the tile information is still here. */
00265   if (!MayHaveBridgeAbove(t)) SB(_m[t].m6, 6, 2, 0);
00266 
00267   SetTileType(t, MP_CLEAR);
00268   _m[t].m1 = 0;
00269   SetTileOwner(t, OWNER_NONE);
00270   _m[t].m2 = 0;
00271   _m[t].m3 = 0;
00272   _m[t].m4 = 0 << 5 | 0 << 2;
00273   SetClearGroundDensity(t, g, density); // Sets m5
00274   SB(_m[t].m6, 2, 4, 0); // Other bits are "tropic zone" and "bridge above"
00275   _me[t].m7 = 0;
00276 }
00277 
00278 
00285 static inline void MakeField(TileIndex t, uint field_type, IndustryID industry)
00286 {
00287   SetTileType(t, MP_CLEAR);
00288   _m[t].m1 = 0;
00289   SetTileOwner(t, OWNER_NONE);
00290   _m[t].m2 = industry;
00291   _m[t].m3 = field_type;
00292   _m[t].m4 = 0 << 5 | 0 << 2;
00293   SetClearGroundDensity(t, CLEAR_FIELDS, 3);
00294   SB(_m[t].m6, 2, 4, 0);
00295   _me[t].m7 = 0;
00296 }
00297 
00304 static inline void MakeSnow(TileIndex t, uint density = 0)
00305 {
00306   assert(GetClearGround(t) != CLEAR_SNOW);
00307   SetBit(_m[t].m3, 4);
00308   if (GetRawClearGround(t) == CLEAR_FIELDS) {
00309     SetClearGroundDensity(t, CLEAR_GRASS, density);
00310   } else {
00311     SetClearDensity(t, density);
00312   }
00313 }
00314 
00320 static inline void ClearSnow(TileIndex t)
00321 {
00322   assert(GetClearGround(t) == CLEAR_SNOW);
00323   ClrBit(_m[t].m3, 4);
00324   SetClearDensity(t, 3);
00325 }
00326 
00327 #endif /* CLEAR_MAP_H */