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(svn r1130) Add helper functions to query map size

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tron 2004-12-16 12:30:13 +00:00
parent 74a149127d
commit 89fd12692f
2 changed files with 15 additions and 0 deletions
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3
map.c
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@ -2,6 +2,9 @@
#include "ttd.h"
#include "map.h"
uint _map_log_x = TILE_X_BITS;
uint _map_log_y = TILE_Y_BITS;
byte _map_type_and_height[TILES_X * TILES_Y];
byte _map5[TILES_X * TILES_Y];
byte _map3_lo[TILES_X * TILES_Y];

12
map.h
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@ -18,4 +18,16 @@ extern byte _map_owner[TILES_X * TILES_Y];
extern byte _map2[TILES_X * TILES_Y];
extern byte _map_extra_bits[TILES_X * TILES_Y / 4];
// binary logarithm of the map size, try to avoid using this one
static inline uint MapLogX(void) { extern uint _map_log_x; return _map_log_x; }
static inline uint MapLogY(void) { extern uint _map_log_y; return _map_log_y; }
/* The size of the map */
static inline uint MapSizeX(void) { return 1 << MapLogX(); }
static inline uint MapSizeY(void) { return 1 << MapLogY(); }
/* The maximum coordinates */
static inline uint MapMaxX(void) { return MapSizeX() - 1; }
static inline uint MapMaxY(void) { return MapSizeY() - 1; }
/* The number of tiles in the map */
static inline uint MapSize(void) { return MapSizeX() * MapSizeY(); }
#endif