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/* $Id$ */

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#ifndef CLEAR_H

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#define CLEAR_H

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#include "macros.h"

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/* ground type, m5 bits 2...4

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 * valid densities (bits 0...1) in comments after the enum

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 */

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typedef enum ClearGround {

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	CL_GRASS  = 0, // 0-3

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	CL_ROUGH  = 1, // 3

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	CL_ROCKS  = 2, // 3

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	CL_FIELDS = 3, // 3

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	CL_SNOW   = 4, // 0-3

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	CL_DESERT = 5  // 1,3

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} ClearGround;

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static inline ClearGround GetClearGround(TileIndex t) { return GB(_m[t].m5, 2, 3); }

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static inline bool IsClearGround(TileIndex t, ClearGround ct) { return GetClearGround(t) == ct; }

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static inline void AddClearDensity(TileIndex t, int d) { _m[t].m5 += d; }

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static inline uint GetClearDensity(TileIndex t) { return GB(_m[t].m5, 0, 2); }

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static inline void AddClearCounter(TileIndex t, int c) { _m[t].m5 += c << 5; }

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static inline uint GetClearCounter(TileIndex t) { return GB(_m[t].m5, 5, 3); }

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static inline void SetClearCounter(TileIndex t, uint c) { SB(_m[t].m5, 5, 3, c); }

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/* Sets type and density in one go, also sets the counter to 0 */

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static inline void SetClearGroundDensity(TileIndex t, ClearGround type, uint density)

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{

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	_m[t].m5 = 0 << 5 | type << 2 | density;

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}

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static inline uint GetFieldType(TileIndex t) { return GB(_m[t].m3, 0, 4); }

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static inline void SetFieldType(TileIndex t, uint f) { SB(_m[t].m3, 0, 4, f); }

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/* Is used by tree tiles, too */

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static inline uint GetFenceSE(TileIndex t) { return GB(_m[t].m4, 2, 3); }

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static inline void SetFenceSE(TileIndex t, uint h) { SB(_m[t].m4, 2, 3, h); }

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static inline uint GetFenceSW(TileIndex t) { return GB(_m[t].m4, 5, 3); }

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static inline void SetFenceSW(TileIndex t, uint h) { SB(_m[t].m4, 5, 3, h); }

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#endif