mirror of
https://github.com/JGRennison/OpenTTD-patches.git
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64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
#ifndef MAP_H
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#define MAP_H
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#define TILE_FROM_XY(x,y) (int)((((y) >> 4) << MapLogX()) + ((x) >> 4))
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#define TILE_XY(x,y) (int)(((y) << MapLogX()) + (x))
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#define TILE_MASK(x) (int)((x) & ((1 << (MapLogX() + MapLogY())) - 1))
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extern byte _map_type_and_height[];
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extern byte _map5[];
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extern byte _map3_lo[];
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extern byte _map3_hi[];
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extern byte _map_owner[];
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extern uint16 _map2[];
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extern byte _map_extra_bits[];
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// binary logarithm of the map size, try to avoid using this one
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static inline uint MapLogX(void) { extern uint _map_log_x; return _map_log_x; }
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static inline uint MapLogY(void) { extern uint _map_log_y; return _map_log_y; }
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/* The size of the map */
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static inline uint MapSizeX(void) { return 1 << MapLogX(); }
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static inline uint MapSizeY(void) { return 1 << MapLogY(); }
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/* The maximum coordinates */
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static inline uint MapMaxX(void) { return MapSizeX() - 1; }
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static inline uint MapMaxY(void) { return MapSizeY() - 1; }
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/* The number of tiles in the map */
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static inline uint MapSize(void) { return MapSizeX() * MapSizeY(); }
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typedef uint16 TileIndex;
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static inline uint TileX(TileIndex tile)
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{
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return tile & MapMaxX();
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}
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static inline uint TileY(TileIndex tile)
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{
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return tile >> MapLogX();
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}
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typedef int16 TileIndexDiff;
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typedef struct TileIndexDiffC {
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int16 x;
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int16 y;
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} TileIndexDiffC;
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static inline TileIndexDiff ToTileIndexDiff(TileIndexDiffC tidc)
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{
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return (tidc.y << MapLogX()) + tidc.x;
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}
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static inline TileIndexDiff TileOffsByDir(uint dir)
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{
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extern const TileIndexDiffC _tileoffs_by_dir[4];
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assert(dir < lengthof(_tileoffs_by_dir));
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return ToTileIndexDiff(_tileoffs_by_dir[dir]);
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}
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#endif
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