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/* $Id$ */
/** @file unmovable_map.h Map accessors for unmovable tiles. */
#ifndef UNMOVABLE_MAP_H
#define UNMOVABLE_MAP_H
#include "core/bitmath_func.hpp"
#include "tile_map.h"
enum {
HQ_NUM_TILE = 4, ///< Number of HQ tiles
HQ_NUM_SIZE = 5 ///< Number of stages of an HQ
};
/** Types of unmovable structure */
enum UnmovableType {
UNMOVABLE_TRANSMITTER = 0, ///< The large antenna
UNMOVABLE_LIGHTHOUSE = 1, ///< The nice lighthouse
UNMOVABLE_STATUE = 2, ///< Statue in towns
UNMOVABLE_OWNED_LAND = 3, ///< Owned land 'flag'
UNMOVABLE_HQ_NORTH = 0x80, ///< Offset for the northern HQ tile
UNMOVABLE_HQ_WEST = 0x81, ///< Offset for the western HQ tile
UNMOVABLE_HQ_EAST = 0x82, ///< Offset for the eastern HQ tile
UNMOVABLE_HQ_SOUTH = 0x83, ///< Offset for the southern HQ tile
/** End of the HQ (rather end + 1 for IsInside) */
UNMOVABLE_HQ_END = UNMOVABLE_HQ_NORTH + HQ_NUM_SIZE * HQ_NUM_TILE
};
/**
* Gets the UnmovableType of the given unmovable tile
* @param t the tile to get the type from.
* @pre IsTileType(t, MP_UNMOVABLE)
* @return the type.
*/
static inline UnmovableType GetUnmovableType(TileIndex t)
{
assert(IsTileType(t, MP_UNMOVABLE));
return (UnmovableType)_m[t].m5;
}
/**
* Does the given tile have a transmitter?
* @param t the tile to inspect.
* @return true if and only if the tile has a transmitter.
*/
static inline bool IsTransmitterTile(TileIndex t)
{
return IsTileType(t, MP_UNMOVABLE) && GetUnmovableType(t) == UNMOVABLE_TRANSMITTER;
}
/**
* Is this unmovable tile an 'owned land' tile?
* @param t the tile to inspect.
* @pre IsTileType(t, MP_UNMOVABLE)
* @return true if and only if the tile is an 'owned land' tile.
*/
static inline bool IsOwnedLand(TileIndex t)
{
assert(IsTileType(t, MP_UNMOVABLE));
return GetUnmovableType(t) == UNMOVABLE_OWNED_LAND;
}
/**
* Is the given tile (pre-)owned by someone (the little flags)?
* @param t the tile to inspect.
* @return true if and only if the tile is an 'owned land' tile.
*/
static inline bool IsOwnedLandTile(TileIndex t)
{
return IsTileType(t, MP_UNMOVABLE) && IsOwnedLand(t);
}
/**
* Is this unmovable tile a HQ tile?
* @param t the tile to inspect.
* @pre IsTileType(t, MP_UNMOVABLE)
* @return true if and only if the tile is a HQ tile.
*/
static inline bool IsCompanyHQ(TileIndex t)
{
assert(IsTileType(t, MP_UNMOVABLE));
return HasBit(_m[t].m5, 7);
}
/**
* Is this unmovable tile a statue?
* @param t the tile to inspect.
* @pre IsTileType(t, MP_UNMOVABLE)
* @return true if and only if the tile is a statue.
*/
static inline bool IsStatue(TileIndex t)
{
assert(IsTileType(t, MP_UNMOVABLE));
return GetUnmovableType(t) == UNMOVABLE_STATUE;
}
/**
* Is the given tile a statue?
* @param t the tile to inspect.
* @return true if and only if the tile is a statue.
*/
static inline bool IsStatueTile(TileIndex t)
{
return IsTileType(t, MP_UNMOVABLE) && IsStatue(t);
}
/**
* Get the town of the given statue tile.
* @param t the tile of the statue.
* @pre IsStatueTile(t)
* @return the town the given statue is in.
*/
static inline TownID GetStatueTownID(TileIndex t)
{
assert(IsStatueTile(t));
return _m[t].m2;
}
/**
* Get the 'stage' of the HQ.
* @param t a tile of the HQ.
* @pre IsTileType(t, MP_UNMOVABLE) && IsCompanyHQ(t)
* @return the 'stage' of the HQ.
*/
static inline byte GetCompanyHQSize(TileIndex t)
{
assert(IsTileType(t, MP_UNMOVABLE) && IsCompanyHQ(t));
return GB(_m[t].m5, 2, 3);
}
/**
* Get the 'section' (including stage) of the HQ.
* @param t a tile of the HQ.
* @pre IsTileType(t, MP_UNMOVABLE) && IsCompanyHQ(t)
* @return the 'section' of the HQ.
*/
static inline byte GetCompanyHQSection(TileIndex t)
{
assert(IsTileType(t, MP_UNMOVABLE) && IsCompanyHQ(t));
return GB(_m[t].m5, 0, 5);
}
/**
* Enlarge the given HQ to the given size. If the new size
* is larger than the current size, nothing happens.
* @param t the tile of the HQ.
* @param size the new size of the HQ.
* @pre t is the northern tile of the HQ
*/
static inline void EnlargeCompanyHQ(TileIndex t, byte size)
{
assert(GB(GetCompanyHQSection(t), 0, 2) == 0);
size *= 4;
if (size <= _m[t].m5 - UNMOVABLE_HQ_NORTH) return;
_m[t + TileDiffXY(0, 0)].m5 = UNMOVABLE_HQ_NORTH + size;
_m[t + TileDiffXY(0, 1)].m5 = UNMOVABLE_HQ_WEST + size;
_m[t + TileDiffXY(1, 0)].m5 = UNMOVABLE_HQ_EAST + size;
_m[t + TileDiffXY(1, 1)].m5 = UNMOVABLE_HQ_SOUTH + size;
}
/**
* Make an Unmovable tile.
* @note do not use this function directly. Use one of the other Make* functions.
* @param t the tile to make unmovable.
* @param u the unmovable type of the tile.
* @param o the new owner of the tile.
*/
static inline void MakeUnmovable(TileIndex t, UnmovableType u, Owner o)
{
SetTileType(t, MP_UNMOVABLE);
SetTileOwner(t, o);
_m[t].m2 = 0;
_m[t].m3 = 0;
_m[t].m4 = 0;
_m[t].m5 = u;
}
/**
* Make a transmitter tile.
* @param t the tile to make a transmitter.
*/
static inline void MakeTransmitter(TileIndex t)
{
MakeUnmovable(t, UNMOVABLE_TRANSMITTER, OWNER_NONE);
}
/**
* Make a lighthouse tile.
* @param t the tile to make a transmitter.
*/
static inline void MakeLighthouse(TileIndex t)
{
MakeUnmovable(t, UNMOVABLE_LIGHTHOUSE, OWNER_NONE);
}
/**
* Make a statue tile.
* @param t the tile to make a statue.
* @param o the owner of the statue.
* @param town_id the town the statue was built in.
*/
static inline void MakeStatue(TileIndex t, Owner o, TownID town_id)
{
MakeUnmovable(t, UNMOVABLE_STATUE, o);
_m[t].m2 = town_id;
}
/**
* Make an 'owned land' tile.
* @param t the tile to make an 'owned land' tile.
* @param o the owner of the land.
*/
static inline void MakeOwnedLand(TileIndex t, Owner o)
{
MakeUnmovable(t, UNMOVABLE_OWNED_LAND, o);
}
/**
* Make an HQ with the give tile as it's northern tile.
* @param t the tile to make the northern tile of a HQ.
* @param o the owner of the HQ.
*/
static inline void MakeCompanyHQ(TileIndex t, Owner o)
{
MakeUnmovable(t + TileDiffXY(0, 0), UNMOVABLE_HQ_NORTH, o);
MakeUnmovable(t + TileDiffXY(0, 1), UNMOVABLE_HQ_WEST, o);
MakeUnmovable(t + TileDiffXY(1, 0), UNMOVABLE_HQ_EAST, o);
MakeUnmovable(t + TileDiffXY(1, 1), UNMOVABLE_HQ_SOUTH, o);
}
#endif /* UNMOVABLE_MAP_H */
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