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/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file unmovable_map.h Map accessors for unmovable tiles. */
#ifndef UNMOVABLE_MAP_H
#define UNMOVABLE_MAP_H
#include "tile_map.h"
#include "unmovable_type.h"
/**
* 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 _m[t].m5 == UNMOVABLE_HQ;
}
/**
* 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 animation stage/counter of this tile.
* @param t The tile to query.
* @pre IsTileType(t, MP_UNMOVABLE)
* @return The animation 'stage' of the tile.
*/
static inline byte GetUnmovableAnimationStage(TileIndex t)
{
assert(IsTileType(t, MP_UNMOVABLE));
return GB(_m[t].m6, 2, 4);
}
/**
* Set animation stage/counter of this tile.
* @param t The tile to query.
* @param stage The stage of this tile.
* @pre IsTileType(t, MP_UNMOVABLE)
*/
static inline void SetUnmovableAnimationStage(TileIndex t, uint8 stage)
{
assert(IsTileType(t, MP_UNMOVABLE));
SB(_m[t].m6, 2, 4, stage);
}
/**
* Get offset to the northern most tile.
* @param t The tile to get the offset from.
* @return The offset to the northern most tile of this structure.
* @pre IsTileType(t, MP_UNMOVABLE)
*/
static inline byte GetUnmovableOffset(TileIndex t)
{
assert(IsTileType(t, MP_UNMOVABLE));
return _m[t].m3;
}
/**
* Set offset to the northern most tile.
* @param t The tile to set the offset of.
* @param offset The offset to the northern most tile of this structure.
* @pre IsTileType(t, MP_UNMOVABLE)
*/
static inline void SetUnmovableOffset(TileIndex t, uint8 offset)
{
assert(IsTileType(t, MP_UNMOVABLE));
_m[t].m3 = offset;
}
/**
* 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.
* @param offset The offset to the northern tile of this object.
* @param index Generic index associated with the object type.
*/
static inline void MakeUnmovable(TileIndex t, UnmovableType u, Owner o, uint8 offset, uint index)
{
SetTileType(t, MP_UNMOVABLE);
SetTileOwner(t, o);
_m[t].m2 = index;
_m[t].m3 = offset;
_m[t].m4 = 0;
_m[t].m5 = u;
SB(_m[t].m6, 2, 4, 0);
_me[t].m7 = 0;
}
#endif /* UNMOVABLE_MAP_H */
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