Files @ r5595:baebc9e54b71
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Location: cpp/openttd-patchpack/source/src/tile.h

Darkvater
(svn r8049) -Regression (r7369): Removing certain news windows could cause a crash due to only
one MoveToNextItem() in DeleteVehicleNews (added in r3757). To work correctly do not
reset _forced_news to INVALID_NEWS when a new item is added, but leave it.
-Codechange: ShowLastNewsMessage has been changed so that it actually works, wraps
around correctly (array as FIFO) and shows the previous news item if the current
news item is open (previously this was doubly shown).
/* $Id$ */

#ifndef TILE_H
#define TILE_H

#include "macros.h"
#include "openttd.h"
#include "map.h"
#include "slope.h"

typedef enum TileTypes {
	MP_CLEAR,
	MP_RAILWAY,
	MP_STREET,
	MP_HOUSE,
	MP_TREES,
	MP_STATION,
	MP_WATER,
	MP_VOID, // invisible tiles at the SW and SE border
	MP_INDUSTRY,
	MP_TUNNELBRIDGE,
	MP_UNMOVABLE,
} TileType;

typedef enum TropicZones {
	TROPICZONE_INVALID    = 0,
	TROPICZONE_DESERT     = 1,
	TROPICZONE_RAINFOREST = 2,
} TropicZone;

Slope GetTileSlope(TileIndex tile, uint *h);
uint GetTileZ(TileIndex tile);
uint GetTileMaxZ(TileIndex tile);

static inline uint TileHeight(TileIndex tile)
{
	assert(tile < MapSize());
	return GB(_m[tile].type_height, 0, 4);
}

static inline void SetTileHeight(TileIndex tile, uint height)
{
	assert(tile < MapSize());
	assert(height < 16);
	SB(_m[tile].type_height, 0, 4, height);
}

static inline uint TilePixelHeight(TileIndex tile)
{
	return TileHeight(tile) * TILE_HEIGHT;
}

static inline TileType GetTileType(TileIndex tile)
{
	assert(tile < MapSize());
	return (TileType)GB(_m[tile].type_height, 4, 4);
}

static inline void SetTileType(TileIndex tile, TileType type)
{
	assert(tile < MapSize());
	/* VOID tiles (and no others) are exactly allowed at the lower left and right
	 * edges of the map */
	assert((TileX(tile) == MapMaxX() || TileY(tile) == MapMaxY()) == (type == MP_VOID));
	SB(_m[tile].type_height, 4, 4, type);
}

static inline bool IsTileType(TileIndex tile, TileType type)
{
	return GetTileType(tile) == type;
}


static inline Owner GetTileOwner(TileIndex tile)
{
	assert(tile < MapSize());
	assert(!IsTileType(tile, MP_HOUSE));
	assert(!IsTileType(tile, MP_VOID));
	assert(!IsTileType(tile, MP_INDUSTRY));

	return (Owner)_m[tile].m1;
}

static inline void SetTileOwner(TileIndex tile, Owner owner)
{
	assert(tile < MapSize());
	assert(!IsTileType(tile, MP_HOUSE));
	assert(!IsTileType(tile, MP_VOID));
	assert(!IsTileType(tile, MP_INDUSTRY));

	_m[tile].m1 = owner;
}

static inline bool IsTileOwner(TileIndex tile, Owner owner)
{
	return GetTileOwner(tile) == owner;
}

/**
 * Set the tropic zone
 * @param tile the tile to set the zone of
 * @param type the new type
 * @pre assert(tile < MapSize());
 */
static inline void SetTropicZone(TileIndex tile, TropicZone type)
{
	assert(tile < MapSize());
	SB(_m[tile].extra, 0, 2, type);
}

/**
 * Get the tropic zone
 * @param tile the tile to get the zone of
 * @pre assert(tile < MapSize());
 * @return the zone type
 */
static inline TropicZone GetTropicZone(TileIndex tile)
{
	assert(tile < MapSize());
	return (TropicZone)GB(_m[tile].extra, 0, 2);
}
#endif /* TILE_H */