mirror of
https://github.com/JGRennison/OpenTTD-patches.git
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99 lines
3.6 KiB
C++
99 lines
3.6 KiB
C++
/*
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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 economy_func.h Functions related to the economy. */
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#ifndef ECONOMY_FUNC_H
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#define ECONOMY_FUNC_H
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#include "economy_type.h"
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#include "station_type.h"
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#include "cargo_type.h"
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#include "vehicle_type.h"
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#include "company_type.h"
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#include "settings_type.h"
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#include "core/random_func.hpp"
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void ResetPriceBaseMultipliers();
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void SetPriceBaseMultiplier(Price price, int factor);
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extern const ScoreInfo _score_info[];
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extern int64_t _score_part[MAX_COMPANIES][SCORE_END];
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extern Economy _economy;
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/* Prices and also the fractional part. */
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extern Prices _price;
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int UpdateCompanyRatingAndValue(Company *c, bool update);
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void StartupIndustryDailyChanges(bool init_counter);
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Money GetTransportedGoodsIncome(uint num_pieces, uint dist, uint16_t transit_periods, CargoID cargo_type);
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uint MoveGoodsToStation(CargoID type, uint amount, SourceType source_type, SourceID source_id, const StationList *all_stations, Owner exclusivity = INVALID_OWNER);
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void PrepareUnload(Vehicle *front_v);
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void LoadUnloadStation(Station *st);
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Money GetPrice(Price index, uint cost_factor, const struct GRFFile *grf_file, int shift = 0);
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void InitializeEconomy();
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void RecomputePrices();
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bool AddInflation(bool check_year = true);
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/**
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* Is the economy in recession?
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* @return \c True if economy is in recession, \c false otherwise.
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*/
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inline bool EconomyIsInRecession()
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{
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return _economy.fluct <= 0;
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}
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/**
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* Scale a number by the inverse of the cargo scale setting, e.g. a scale of 25% multiplies the number by 4.
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* @param num The number to scale.
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* @param town Are we scaling town production, or industry production?
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* @return The number scaled by the inverse of the cargo scale setting, minimum of 1.
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*/
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static uint ScaleByInverseCargoScale(uint num, bool town)
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{
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uint16_t percentage = (town ? _settings_game.economy.town_cargo_scale : _settings_game.economy.industry_cargo_scale);
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/* We might not need to do anything. */
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if (percentage == 100) return num;
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/* Never return 0, since we often divide by this number. */
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return std::max((num * 100) / percentage, 1u);
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}
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/**
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* Scale a number by the cargo scale setting.
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* @param num The number to scale.
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* @param town Are we scaling town production, or industry production?
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* @return The number scaled by the current cargo scale setting. May be 0.
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*/
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inline uint ScaleByCargoScale(uint num, bool town)
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{
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/* Don't bother scaling in the menu, especially since settings don't exist when starting OpenTTD and trying to read them crashes the game. */
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if (_game_mode == GM_MENU) return num;
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if (num == 0) return num;
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uint16_t percentage = (town ? _settings_game.economy.town_cargo_scale : _settings_game.economy.industry_cargo_scale);
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/* We might not need to do anything. */
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if (percentage == 100) return num;
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uint scaled = (num * percentage) / 100;
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/* We might round down to 0, so we compensate with a random chance approximately equal to the economy scale,
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* e.g. at 25% scale there's a 1/4 chance to round up to 1. */
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if (scaled == 0 && Chance16(1, ScaleByInverseCargoScale(1, town))) return 1;
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return scaled;
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}
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#endif /* ECONOMY_FUNC_H */
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