src/newgrf_house.h

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * 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.
   6  * 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.
   7  * 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/>.
   8  */
   9
  10 /** @file newgrf_house.h Functions related to NewGRF houses. */
  11
  12 #ifndef NEWGRF_HOUSE_H
  13 #define NEWGRF_HOUSE_H
  14
  15 #include "newgrf_callbacks.h"
  16 #include "tile_cmd.h"
  17 #include "house_type.h"
  18 #include "newgrf_spritegroup.h"
  19 #include "newgrf_town.h"
  20
  21 /** Scope resolver for houses. */
  22 struct HouseScopeResolver : public ScopeResolver {
  23         HouseID house_id;              ///< Type of house being queried.
  24         TileIndex tile;                ///< Tile of this house.
  25         Town *town;                    ///< Town of this house.
  26         bool not_yet_constructed;      ///< True for construction check.
  27         uint16 initial_random_bits;    ///< Random bits during construction checks.
  28         uint32 watched_cargo_triggers; ///< Cargo types that triggered the watched cargo callback.
  29
  30         /**
  31          * Constructor of a house scope resolver.
  32          * @param ro Surrounding resolver.
  33          * @param house_id House type being queried.
  34          * @param tile %Tile containing the house.
  35          * @param town %Town containing the house.
  36          * @param not_yet_constructed House is still under construction.
  37          * @param initial_random_bits Random bits during construction checks.
  38          * @param watched_cargo_triggers Cargo types that triggered the watched cargo callback.
  39          */
  40         HouseScopeResolver(ResolverObject &ro, HouseID house_id, TileIndex tile, Town *town,
  41                         bool not_yet_constructed, uint8 initial_random_bits, uint32 watched_cargo_triggers)
  42                 : ScopeResolver(ro), house_id(house_id), tile(tile), town(town), not_yet_constructed(not_yet_constructed),
  43                 initial_random_bits(initial_random_bits), watched_cargo_triggers(watched_cargo_triggers)
  44         {
  45         }
  46
  47         /* virtual */ uint32 GetRandomBits() const;
  48         /* virtual */ uint32 GetVariable(byte variable, uint32 parameter, bool *available) const;
  49         /* virtual */ uint32 GetTriggers() const;
  50 };
  51
  52 /** Resolver object to be used for houses (feature 07 spritegroups). */
  53 struct HouseResolverObject : public ResolverObject {
  54         HouseScopeResolver house_scope;
  55         TownScopeResolver  town_scope;
  56
  57         HouseResolverObject(HouseID house_id, TileIndex tile, Town *town,
  58                         CallbackID callback = CBID_NO_CALLBACK, uint32 param1 = 0, uint32 param2 = 0,
  59                         bool not_yet_constructed = false, uint8 initial_random_bits = 0, uint32 watched_cargo_triggers = 0);
  60
  61         /* virtual */ ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0)
  62         {
  63                 switch (scope) {
  64                         case VSG_SCOPE_SELF:   return &this->house_scope;
  65                         case VSG_SCOPE_PARENT: return &this->town_scope;
  66                         default: return ResolverObject::GetScope(scope, relative);
  67                 }
  68         }
  69 };
  70
  71 /**
  72  * Makes class IDs unique to each GRF file.
  73  * Houses can be assigned class IDs which are only comparable within the GRF
  74  * file they were defined in. This mapping ensures that if two houses have the
  75  * same class as defined by the GRF file, the classes are different within the
  76  * game. An array of HouseClassMapping structs is created, and the array index
  77  * of the struct that matches both the GRF ID and the class ID is the class ID
  78  * used in the game.
  79  *
  80  * Although similar to the HouseIDMapping struct above, this serves a different
  81  * purpose. Since the class ID is not saved anywhere, this mapping does not
  82  * need to be persistent; it just needs to keep class ids unique.
  83  */
  84 struct HouseClassMapping {
  85         uint32 grfid;     ///< The GRF ID of the file this class belongs to
  86         uint8  class_id;  ///< The class id within the grf file
  87 };
  88
  89 HouseClassID AllocateHouseClassID(byte grf_class_id, uint32 grfid);
  90
  91 void InitializeBuildingCounts();
  92 void IncreaseBuildingCount(Town *t, HouseID house_id);
  93 void DecreaseBuildingCount(Town *t, HouseID house_id);
  94
  95 void DrawNewHouseTile(TileInfo *ti, HouseID house_id);
  96 void AnimateNewHouseTile(TileIndex tile);
  97 void AnimateNewHouseConstruction(TileIndex tile);
  98
  99 uint16 GetHouseCallback(CallbackID callback, uint32 param1, uint32 param2, HouseID house_id, Town *town, TileIndex tile,
 100                 bool not_yet_constructed = false, uint8 initial_random_bits = 0, uint32 watched_cargo_triggers = 0);
 101 void WatchedCargoCallback(TileIndex tile, uint32 trigger_cargoes);
 102
 103 bool CanDeleteHouse(TileIndex tile);
 104
 105 bool NewHouseTileLoop(TileIndex tile);
 106
 107 enum HouseTrigger {
 108         /* The tile of the house has been triggered during the tileloop. */
 109         HOUSE_TRIGGER_TILE_LOOP     = 0x01,
 110         /*
 111          * The top tile of a (multitile) building has been triggered during and all
 112          * the tileloop other tiles of the same building get the same random value.
 113          */
 114         HOUSE_TRIGGER_TILE_LOOP_TOP = 0x02,
 115 };
 116 void TriggerHouse(TileIndex t, HouseTrigger trigger);
 117
 118 #endif /* NEWGRF_HOUSE_H */