src/newgrf_industries.h

   1 /*
   2  * This file is part of OpenTTD.
   3  * 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.
   4  * 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.
   5  * 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/>.
   6  */
   7
   8 /** @file newgrf_industries.h Functions for NewGRF industries. */
   9
  10 #ifndef NEWGRF_INDUSTRIES_H
  11 #define NEWGRF_INDUSTRIES_H
  12
  13 #include "newgrf_town.h"
  14
  15 /** Resolver for industry scopes. */
  16 struct IndustriesScopeResolver : public ScopeResolver {
  17         TileIndex tile;     ///< Tile owned by the industry.
  18         Industry *industry; ///< %Industry being resolved.
  19         IndustryType type;  ///< Type of the industry.
  20         uint32 random_bits; ///< Random bits of the new industry.
  21
  22         /**
  23          * Scope resolver for industries.
  24          * @param ro Surrounding resolver.
  25          * @param tile %Tile owned by the industry.
  26          * @param industry %Industry being resolved.
  27          * @param type Type of the industry.
  28          * @param random_bits Random bits of the new industry.
  29          */
  30         IndustriesScopeResolver(ResolverObject &ro, TileIndex tile, Industry *industry, IndustryType type, uint32 random_bits = 0)
  31                 : ScopeResolver(ro), tile(tile), industry(industry), type(type), random_bits(random_bits)
  32         {
  33         }
  34
  35         uint32 GetRandomBits() const override;
  36         uint32 GetVariable(byte variable, uint32 parameter, bool *available) const override;
  37         uint32 GetTriggers() const override;
  38         void StorePSA(uint pos, int32 value) override;
  39 };
  40
  41 /** Resolver for industries. */
  42 struct IndustriesResolverObject : public ResolverObject {
  43         IndustriesScopeResolver industries_scope; ///< Scope resolver for the industry.
  44         TownScopeResolver *town_scope;            ///< Scope resolver for the associated town (if needed and available, else \c nullptr).
  45
  46         IndustriesResolverObject(TileIndex tile, Industry *indus, IndustryType type, uint32 random_bits = 0,
  47                         CallbackID callback = CBID_NO_CALLBACK, uint32 callback_param1 = 0, uint32 callback_param2 = 0);
  48         ~IndustriesResolverObject();
  49
  50         TownScopeResolver *GetTown();
  51
  52         ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0) override
  53         {
  54                 switch (scope) {
  55                         case VSG_SCOPE_SELF: return &industries_scope;
  56                         case VSG_SCOPE_PARENT: {
  57                                 TownScopeResolver *tsr = this->GetTown();
  58                                 if (tsr != nullptr) return tsr;
  59                         }
  60                         FALLTHROUGH;
  61
  62                         default:
  63                                 return ResolverObject::GetScope(scope, relative);
  64                 }
  65         }
  66 };
  67
  68 /** When should the industry(tile) be triggered for random bits? */
  69 enum IndustryTrigger {
  70         /** Triggered each tile loop */
  71         INDUSTRY_TRIGGER_TILELOOP_PROCESS = 1,
  72         /** Triggered (whole industry) each 256 ticks */
  73         INDUSTRY_TRIGGER_256_TICKS        = 2,
  74         /** Triggered on cargo delivery */
  75         INDUSTRY_TRIGGER_CARGO_DELIVERY   = 4,
  76 };
  77
  78 /** From where has callback #CBID_INDUSTRY_PROBABILITY been called */
  79 enum IndustryAvailabilityCallType {
  80         IACT_MAPGENERATION,    ///< during random map generation
  81         IACT_RANDOMCREATION,   ///< during creation of random ingame industry
  82         IACT_USERCREATION,     ///< from the Fund/build window
  83         IACT_PROSPECTCREATION, ///< from the Fund/build using prospecting
  84 };
  85
  86 /* in newgrf_industry.cpp */
  87 uint16 GetIndustryCallback(CallbackID callback, uint32 param1, uint32 param2, Industry *industry, IndustryType type, TileIndex tile);
  88 uint32 GetIndustryIDAtOffset(TileIndex new_tile, const Industry *i, uint32 cur_grfid);
  89 void IndustryProductionCallback(Industry *ind, int reason);
  90 CommandCost CheckIfCallBackAllowsCreation(TileIndex tile, IndustryType type, size_t layout, uint32 seed, uint16 initial_random_bits, Owner founder, IndustryAvailabilityCallType creation_type);
  91 uint32 GetIndustryProbabilityCallback(IndustryType type, IndustryAvailabilityCallType creation_type, uint32 default_prob);
  92 bool IndustryTemporarilyRefusesCargo(Industry *ind, CargoID cargo_type);
  93
  94 IndustryType MapNewGRFIndustryType(IndustryType grf_type, uint32 grf_id);
  95
  96 /* in newgrf_industrytiles.cpp*/
  97 uint32 GetNearbyIndustryTileInformation(byte parameter, TileIndex tile, IndustryID index, bool signed_offsets, bool grf_version8);
  98
  99 #endif /* NEWGRF_INDUSTRIES_H */