1

/* $Id$ */

     2

     3

#ifndef CLEAR_H

     4

#define CLEAR_H

     5

     6

#include "macros.h"

     7

#include "tile.h"

     8

     9

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

    10

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

    11

 */

    12

typedef enum ClearGround {

    13

	CL_GRASS  = 0, // 0-3

    14

	CL_ROUGH  = 1, // 3

    15

	CL_ROCKS  = 2, // 3

    16

	CL_FIELDS = 3, // 3

    17

	CL_SNOW   = 4, // 0-3

    18

	CL_DESERT = 5  // 1,3

    19

} ClearGround;

    20

    21

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

    22

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

    23

    24

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

    25

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

    26

    27

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

    28

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

    29

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

    30

    31

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

    32

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

    33

{

    34

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

    35

}

    36

    37

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

    38

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

    39

    40

/* Is used by tree tiles, too */

    41

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

    42

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

    43

    44

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

    45

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

    46

    47

    48

static inline void MakeClear(TileIndex t, ClearGround g, uint density)

    49

{

    50

	SetTileType(t, MP_CLEAR);

    51

	SetTileOwner(t, OWNER_NONE);

    52

	_m[t].m2 = 0;

    53

	_m[t].m3 = 0;

    54

	_m[t].m4 = 0 << 5 | 0 << 2;

    55

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

    56

}

    57

    58

#endif