179 lines
4.8 KiB
C
179 lines
4.8 KiB
C
/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file unmovable_map.h Map accessors for unmovable tiles. */
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#ifndef UNMOVABLE_MAP_H
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#define UNMOVABLE_MAP_H
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#include "tile_map.h"
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#include "unmovable_type.h"
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/**
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* Gets the UnmovableType of the given unmovable tile
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* @param t the tile to get the type from.
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* @pre IsTileType(t, MP_UNMOVABLE)
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* @return the type.
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*/
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static inline UnmovableType GetUnmovableType(TileIndex t)
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{
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assert(IsTileType(t, MP_UNMOVABLE));
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return (UnmovableType)_m[t].m5;
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}
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/**
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* Does the given tile have a transmitter?
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* @param t the tile to inspect.
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* @return true if and only if the tile has a transmitter.
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*/
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static inline bool IsTransmitterTile(TileIndex t)
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{
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return IsTileType(t, MP_UNMOVABLE) && GetUnmovableType(t) == UNMOVABLE_TRANSMITTER;
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}
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/**
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* Is this unmovable tile an 'owned land' tile?
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* @param t the tile to inspect.
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* @pre IsTileType(t, MP_UNMOVABLE)
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* @return true if and only if the tile is an 'owned land' tile.
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*/
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static inline bool IsOwnedLand(TileIndex t)
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{
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assert(IsTileType(t, MP_UNMOVABLE));
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return GetUnmovableType(t) == UNMOVABLE_OWNED_LAND;
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}
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/**
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* Is the given tile (pre-)owned by someone (the little flags)?
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* @param t the tile to inspect.
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* @return true if and only if the tile is an 'owned land' tile.
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*/
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static inline bool IsOwnedLandTile(TileIndex t)
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{
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return IsTileType(t, MP_UNMOVABLE) && IsOwnedLand(t);
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}
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/**
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* Is this unmovable tile a HQ tile?
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* @param t the tile to inspect.
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* @pre IsTileType(t, MP_UNMOVABLE)
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* @return true if and only if the tile is a HQ tile.
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*/
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static inline bool IsCompanyHQ(TileIndex t)
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{
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assert(IsTileType(t, MP_UNMOVABLE));
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return _m[t].m5 == UNMOVABLE_HQ;
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}
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/**
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* Is this unmovable tile a statue?
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* @param t the tile to inspect.
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* @pre IsTileType(t, MP_UNMOVABLE)
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* @return true if and only if the tile is a statue.
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*/
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static inline bool IsStatue(TileIndex t)
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{
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assert(IsTileType(t, MP_UNMOVABLE));
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return GetUnmovableType(t) == UNMOVABLE_STATUE;
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}
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/**
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* Is the given tile a statue?
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* @param t the tile to inspect.
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* @return true if and only if the tile is a statue.
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*/
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static inline bool IsStatueTile(TileIndex t)
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{
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return IsTileType(t, MP_UNMOVABLE) && IsStatue(t);
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}
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/**
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* Get the town of the given statue tile.
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* @param t the tile of the statue.
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* @pre IsStatueTile(t)
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* @return the town the given statue is in.
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*/
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static inline TownID GetStatueTownID(TileIndex t)
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{
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assert(IsStatueTile(t));
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return _m[t].m2;
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}
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/**
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* Get animation stage/counter of this tile.
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* @param t The tile to query.
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* @pre IsTileType(t, MP_UNMOVABLE)
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* @return The animation 'stage' of the tile.
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*/
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static inline byte GetUnmovableAnimationStage(TileIndex t)
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{
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assert(IsTileType(t, MP_UNMOVABLE));
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return GB(_m[t].m6, 2, 4);
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}
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/**
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* Set animation stage/counter of this tile.
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* @param t The tile to query.
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* @param stage The stage of this tile.
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* @pre IsTileType(t, MP_UNMOVABLE)
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*/
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static inline void SetUnmovableAnimationStage(TileIndex t, uint8 stage)
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{
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assert(IsTileType(t, MP_UNMOVABLE));
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SB(_m[t].m6, 2, 4, stage);
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}
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/**
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* Get offset to the northern most tile.
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* @param t The tile to get the offset from.
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* @return The offset to the northern most tile of this structure.
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* @pre IsTileType(t, MP_UNMOVABLE)
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*/
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static inline byte GetUnmovableOffset(TileIndex t)
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{
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assert(IsTileType(t, MP_UNMOVABLE));
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return _m[t].m3;
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}
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/**
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* Set offset to the northern most tile.
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* @param t The tile to set the offset of.
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* @param offset The offset to the northern most tile of this structure.
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* @pre IsTileType(t, MP_UNMOVABLE)
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*/
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static inline void SetUnmovableOffset(TileIndex t, uint8 offset)
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{
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assert(IsTileType(t, MP_UNMOVABLE));
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_m[t].m3 = offset;
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}
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/**
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* Make an Unmovable tile.
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* @note do not use this function directly. Use one of the other Make* functions.
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* @param t The tile to make unmovable.
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* @param u The unmovable type of the tile.
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* @param o The new owner of the tile.
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* @param offset The offset to the northern tile of this object.
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* @param index Generic index associated with the object type.
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*/
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static inline void MakeUnmovable(TileIndex t, UnmovableType u, Owner o, uint8 offset, uint index)
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{
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SetTileType(t, MP_UNMOVABLE);
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SetTileOwner(t, o);
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_m[t].m2 = index;
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_m[t].m3 = offset;
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_m[t].m4 = 0;
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_m[t].m5 = u;
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SB(_m[t].m6, 2, 4, 0);
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_me[t].m7 = 0;
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}
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#endif /* UNMOVABLE_MAP_H */
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