84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
#ifndef MAP_H
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#define MAP_H
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#include "stdafx.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) (((y) << MapLogX()) + (x))
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#define TILE_MASK(x) ((x) & ((1 << (MapLogX() + MapLogY())) - 1))
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extern byte *_map_type_and_height;
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extern byte *_map_owner;
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extern uint16 *_map2;
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extern byte *_map3_lo;
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extern byte *_map3_hi;
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extern byte *_map5;
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extern byte *_map_extra_bits;
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void InitMap(uint log_x, uint log_y);
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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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// Scale a number relative to the map size
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uint ScaleByMapSize(uint); // Scale relative to the number of tiles
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uint ScaleByMapSize1D(uint); // Scale relative to the circumference of the map
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typedef uint32 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 int32 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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#ifndef _DEBUG
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#define TILE_ADD(x,y) ((x) + (y))
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#else
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extern TileIndex TileAdd(TileIndex tile, TileIndexDiff add,
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const char *exp, const char *file, int line);
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#define TILE_ADD(x, y) (TileAdd((x), (y), #x " + " #y, __FILE__, __LINE__))
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#endif
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#define TILE_ADDXY(tile, x, y) TILE_ADD(tile, TILE_XY(x, y))
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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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