diff options
Diffstat (limited to 'clear.h')
| -rw-r--r-- | clear.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/clear.h b/clear.h new file mode 100644 index 000000000..4eb1c5f80 --- /dev/null +++ b/clear.h @@ -0,0 +1,36 @@ +/* $Id$ */ + +#ifndef CLEAR_H +#define CLEAR_H + +#include "macros.h" + +/* ground type, m5 bits 2...4 + * valid densities (bits 0...1) in comments after the enum + */ +typedef enum ClearGround { + CL_GRASS = 0, // 0-3 + CL_ROUGH = 1, // 3 + CL_ROCKS = 2, // 3 + CL_FIELDS = 3, // 3 + CL_SNOW = 4, // 0-3 + CL_DESERT = 5 // 1,3 +} ClearGround; + +static inline ClearGround GetClearGround(TileIndex t) { return GB(_m[t].m5, 2, 3); } +static inline bool IsClearGround(TileIndex t, ClearGround ct) { return GetClearGround(t) == ct; } + +static inline void AddClearDensity(TileIndex t, int d) { _m[t].m5 += d; } +static inline uint GetClearDensity(TileIndex t) { return GB(_m[t].m5, 0, 2); } + +static inline void AddClearCounter(TileIndex t, int c) { _m[t].m5 += c << 5; } +static inline uint GetClearCounter(TileIndex t) { return GB(_m[t].m5, 5, 3); } +static inline void SetClearCounter(TileIndex t, uint c) { SB(_m[t].m5, 5, 3, c); } + +/* Sets type and density in one go, also sets the counter to 0 */ +static inline void SetClearGroundDensity(TileIndex t, ClearGround type, uint density) +{ + _m[t].m5 = 0 << 5 | type << 2 | density; +} + +#endif |