economy_func.h

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/*
 * 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/>.
 */
 
#ifndef ECONOMY_FUNC_H
#define ECONOMY_FUNC_H
 
#include "economy_type.h"
#include "station_type.h"
#include "cargo_type.h"
#include "vehicle_type.h"
#include "company_type.h"
#include "settings_type.h"
#include "source_type.h"
#include "core/random_func.hpp"
 
void ResetPriceBaseMultipliers();
void SetPriceBaseMultiplier(Price price, int factor);
 
extern const ScoreInfo _score_info[];
extern ReferenceThroughBaseContainer<std::array<std::array<int64_t, SCORE_END>, MAX_COMPANIES>> _score_part;
extern Economy _economy;
/* Prices and also the fractional part. */
extern Prices _price;
 
int UpdateCompanyRatingAndValue(Company *c, bool update);
void StartupIndustryDailyChanges(bool init_counter);
 
Money GetTransportedGoodsIncome(uint num_pieces, uint dist, uint16_t transit_periods, CargoType cargo_type);
uint MoveGoodsToStation(CargoType type, uint amount, Source source, const StationList &all_stations, Owner exclusivity = INVALID_OWNER);
 
void PrepareUnload(Vehicle *front_v);
void LoadUnloadStation(Station *st);
 
Money GetPrice(Price index, uint cost_factor, const struct GRFFile *grf_file, int shift = 0);
 
void InitializeEconomy();
void RecomputePrices();
bool AddInflation(bool check_year = true);
 
inline bool EconomyIsInRecession()
{
  return _economy.fluct <= 0;
}
 
static uint ScaleByInverseCargoScale(uint num, bool town)
{
  uint16_t percentage = (town ? _settings_game.economy.town_cargo_scale : _settings_game.economy.industry_cargo_scale);
 
  /* We might not need to do anything. */
  if (percentage == 100) return num;
 
  /* Never return 0, since we often divide by this number. */
  return std::max((num * 100) / percentage, 1u);
}
 
inline uint ScaleByCargoScale(uint num, bool town)
{
  /* Don't bother scaling in the menu, especially since settings don't exist when starting OpenTTD and trying to read them crashes the game. */
  if (_game_mode == GM_MENU) return num;
 
  if (num == 0) return num;
 
  uint16_t percentage = (town ? _settings_game.economy.town_cargo_scale : _settings_game.economy.industry_cargo_scale);
 
  /* We might not need to do anything. */
  if (percentage == 100) return num;
 
  uint scaled = (num * percentage) / 100;
 
  /* We might round down to 0, so we compensate with a random chance approximately equal to the economy scale,
   *  e.g. at 25% scale there's a 1/4 chance to round up to 1. */
  if (scaled == 0 && Chance16(1, ScaleByInverseCargoScale(1, town))) return 1;
 
  return scaled;
}
 
#endif /* ECONOMY_FUNC_H */