map_func.h
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00012 #ifndef MAP_FUNC_H
00013 #define MAP_FUNC_H
00014
00015 #include "core/math_func.hpp"
00016 #include "tile_type.h"
00017 #include "map_type.h"
00018 #include "direction_func.h"
00019
00020 extern uint _map_tile_mask;
00021
00028 #define TILE_MASK(x) ((x) & _map_tile_mask)
00029
00036 extern Tile *_m;
00037
00044 extern TileExtended *_me;
00045
00046 void AllocateMap(uint size_x, uint size_y);
00047
00053 static inline uint MapLogX()
00054 {
00055 extern uint _map_log_x;
00056 return _map_log_x;
00057 }
00058
00064 static inline uint MapLogY()
00065 {
00066 extern uint _map_log_y;
00067 return _map_log_y;
00068 }
00069
00074 static inline uint MapSizeX()
00075 {
00076 extern uint _map_size_x;
00077 return _map_size_x;
00078 }
00079
00084 static inline uint MapSizeY()
00085 {
00086 extern uint _map_size_y;
00087 return _map_size_y;
00088 }
00089
00094 static inline uint MapSize()
00095 {
00096 extern uint _map_size;
00097 return _map_size;
00098 }
00099
00104 static inline uint MapMaxX()
00105 {
00106 return MapSizeX() - 1;
00107 }
00108
00113 static inline uint MapMaxY()
00114 {
00115 return MapSizeY() - 1;
00116 }
00117
00124 static inline uint ScaleByMapSize(uint n)
00125 {
00126
00127
00128 return CeilDiv(n << (MapLogX() + MapLogY() - 12), 1 << 4);
00129 }
00130
00131
00138 static inline uint ScaleByMapSize1D(uint n)
00139 {
00140
00141
00142
00143 return CeilDiv((n << MapLogX()) + (n << MapLogY()), 1 << 9);
00144 }
00145
00156 typedef int32 TileIndexDiff;
00157
00165 static inline TileIndex TileXY(uint x, uint y)
00166 {
00167 return (y << MapLogX()) + x;
00168 }
00169
00181 static inline TileIndexDiff TileDiffXY(int x, int y)
00182 {
00183
00184
00185
00186
00187 return (y * MapSizeX()) + x;
00188 }
00189
00190 static inline TileIndex TileVirtXY(uint x, uint y)
00191 {
00192 return (y >> 4 << MapLogX()) + (x >> 4);
00193 }
00194
00195
00201 static inline uint TileX(TileIndex tile)
00202 {
00203 return tile & MapMaxX();
00204 }
00205
00211 static inline uint TileY(TileIndex tile)
00212 {
00213 return tile >> MapLogX();
00214 }
00215
00226 static inline TileIndexDiff ToTileIndexDiff(TileIndexDiffC tidc)
00227 {
00228 return (tidc.y << MapLogX()) + tidc.x;
00229 }
00230
00231
00232 #ifndef _DEBUG
00233
00240 #define TILE_ADD(x, y) ((x) + (y))
00241 #else
00242 extern TileIndex TileAdd(TileIndex tile, TileIndexDiff add,
00243 const char *exp, const char *file, int line);
00244 #define TILE_ADD(x, y) (TileAdd((x), (y), #x " + " #y, __FILE__, __LINE__))
00245 #endif
00246
00254 #define TILE_ADDXY(tile, x, y) TILE_ADD(tile, TileDiffXY(x, y))
00255
00256 TileIndex TileAddWrap(TileIndex tile, int addx, int addy);
00257
00264 static inline TileIndexDiffC TileIndexDiffCByDiagDir(DiagDirection dir)
00265 {
00266 extern const TileIndexDiffC _tileoffs_by_diagdir[DIAGDIR_END];
00267
00268 assert(IsValidDiagDirection(dir));
00269 return _tileoffs_by_diagdir[dir];
00270 }
00271
00278 static inline TileIndexDiffC TileIndexDiffCByDir(Direction dir)
00279 {
00280 extern const TileIndexDiffC _tileoffs_by_dir[DIR_END];
00281
00282 assert(IsValidDirection(dir));
00283 return _tileoffs_by_dir[dir];
00284 }
00285
00296 static inline TileIndex AddTileIndexDiffCWrap(TileIndex tile, TileIndexDiffC diff)
00297 {
00298 int x = TileX(tile) + diff.x;
00299 int y = TileY(tile) + diff.y;
00300
00301 if ((uint)x >= MapSizeX() || (uint)y >= MapSizeY()) return INVALID_TILE;
00302 return TileXY(x, y);
00303 }
00304
00312 static inline TileIndexDiffC TileIndexToTileIndexDiffC(TileIndex tile_a, TileIndex tile_b)
00313 {
00314 TileIndexDiffC difference;
00315
00316 difference.x = TileX(tile_a) - TileX(tile_b);
00317 difference.y = TileY(tile_a) - TileY(tile_b);
00318
00319 return difference;
00320 }
00321
00322
00323 uint DistanceManhattan(TileIndex, TileIndex);
00324 uint DistanceSquare(TileIndex, TileIndex);
00325 uint DistanceMax(TileIndex, TileIndex);
00326 uint DistanceMaxPlusManhattan(TileIndex, TileIndex);
00327 uint DistanceFromEdge(TileIndex);
00328 uint DistanceFromEdgeDir(TileIndex, DiagDirection);
00329
00337 static inline TileIndexDiff TileOffsByDiagDir(DiagDirection dir)
00338 {
00339 extern const TileIndexDiffC _tileoffs_by_diagdir[DIAGDIR_END];
00340
00341 assert(IsValidDiagDirection(dir));
00342 return ToTileIndexDiff(_tileoffs_by_diagdir[dir]);
00343 }
00344
00351 static inline TileIndexDiff TileOffsByDir(Direction dir)
00352 {
00353 extern const TileIndexDiffC _tileoffs_by_dir[DIR_END];
00354
00355 assert(IsValidDirection(dir));
00356 return ToTileIndexDiff(_tileoffs_by_dir[dir]);
00357 }
00358
00366 static inline TileIndex TileAddByDiagDir(TileIndex tile, DiagDirection dir)
00367 {
00368 return TILE_ADD(tile, TileOffsByDiagDir(dir));
00369 }
00370
00378 static inline DiagDirection DiagdirBetweenTiles(TileIndex tile_from, TileIndex tile_to)
00379 {
00380 int dx = (int)TileX(tile_to) - (int)TileX(tile_from);
00381 int dy = (int)TileY(tile_to) - (int)TileY(tile_from);
00382 if (dx == 0) {
00383 if (dy == 0) return INVALID_DIAGDIR;
00384 return (dy < 0 ? DIAGDIR_NW : DIAGDIR_SE);
00385 } else {
00386 if (dy != 0) return INVALID_DIAGDIR;
00387 return (dx < 0 ? DIAGDIR_NE : DIAGDIR_SW);
00388 }
00389 }
00390
00398 typedef bool TestTileOnSearchProc(TileIndex tile, void *user_data);
00399
00400 bool CircularTileSearch(TileIndex *tile, uint size, TestTileOnSearchProc proc, void *user_data);
00401 bool CircularTileSearch(TileIndex *tile, uint radius, uint w, uint h, TestTileOnSearchProc proc, void *user_data);
00402
00408 static inline TileIndex RandomTileSeed(uint32 r)
00409 {
00410 return TILE_MASK(r);
00411 }
00412
00419 #define RandomTile() RandomTileSeed(Random())
00420
00421 uint GetClosestWaterDistance(TileIndex tile, bool water);
00422
00423 #endif