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author | tron <tron@openttd.org> | 2004-12-16 12:30:13 +0000 |
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committer | tron <tron@openttd.org> | 2004-12-16 12:30:13 +0000 |
commit | 89fd12692f1999b1535d70589bab7366a9eee0f3 (patch) | |
tree | 2a4ccefd32e4f1b60ca59743de7ededf60c6e9ed /map.h | |
parent | 74a149127dbcb4b6c62c7b5adcbb4cba54ddaeb8 (diff) | |
download | openttd-89fd12692f1999b1535d70589bab7366a9eee0f3.tar.xz |
(svn r1130) Add helper functions to query map size
Diffstat (limited to 'map.h')
-rw-r--r-- | map.h | 12 |
1 files changed, 12 insertions, 0 deletions
@@ -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 |