Handling of subsidies. More...

#include "stdafx.h"
#include "company_func.h"
#include "industry.h"
#include "town.h"
#include "news_func.h"
#include "ai/ai.hpp"
#include "station_base.h"
#include "strings_func.h"
#include "window_func.h"
#include "subsidy_base.h"
#include "subsidy_func.h"
#include "core/pool_func.hpp"
#include "core/random_func.hpp"
#include "core/container_func.hpp"
#include "game/game.hpp"
#include "command_func.h"
#include "string_func.h"
#include "tile_cmd.h"
#include "subsidy_cmd.h"
#include "timer/timer.h"
#include "timer/timer_game_economy.h"
#include "table/strings.h"
#include "safeguards.h"

Functions
std::pair< NewsReferenceType, NewsReferenceType >	SetupSubsidyDecodeParam (const Subsidy *s, SubsidyDecodeParamType mode, uint parameter_offset)
	Setup the string parameters for printing the subsidy at the screen, and compute the news reference for the subsidy. More...

static void	SetPartOfSubsidyFlag (SourceType type, SourceID index, PartOfSubsidy flag)
	Sets a flag indicating that given town/industry is part of subsidised route. More...

void	RebuildSubsidisedSourceAndDestinationCache ()
	Perform a full rebuild of the subsidies cache.

void	DeleteSubsidyWith (SourceType type, SourceID index)
	Delete the subsidies associated with a given cargo source type and id. More...

static bool	CheckSubsidyDuplicate (CargoID cargo, SourceType src_type, SourceID src, SourceType dst_type, SourceID dst)
	Check whether a specific subsidy already exists. More...

static bool	CheckSubsidyDistance (SourceType src_type, SourceID src, SourceType dst_type, SourceID dst)
	Checks if the source and destination of a subsidy are inside the distance limit. More...

void	CreateSubsidy (CargoID cid, SourceType src_type, SourceID src, SourceType dst_type, SourceID dst)
	Creates a subsidy with the given parameters. More...

CommandCost	CmdCreateSubsidy (DoCommandFlag flags, CargoID cid, SourceType src_type, SourceID src, SourceType dst_type, SourceID dst)
	Create a new subsidy. More...

bool	FindSubsidyPassengerRoute ()
	Tries to create a passenger subsidy between two towns. More...

bool	FindSubsidyCargoDestination (CargoID cid, SourceType src_type, SourceID src)
	Tries to find a suitable destination for the given source and cargo. More...

bool	FindSubsidyTownCargoRoute ()
	Tries to create a cargo subsidy with a town as source. More...

bool	FindSubsidyIndustryCargoRoute ()
	Tries to create a cargo subsidy with an industry as source. More...

bool	CheckSubsidised (CargoID cargo_type, CompanyID company, SourceType src_type, SourceID src, const Station *st)
	Tests whether given delivery is subsidised and possibly awards the subsidy to delivering company. More...

Variables
SubsidyPool	_subsidy_pool ("Subsidy")
	Pool for the subsidies.

static IntervalTimer< TimerGameEconomy >	_economy_subsidies_monthly ({TimerGameEconomy::MONTH, TimerGameEconomy::Priority::SUBSIDY}, [](auto) { bool modified=false;for(Subsidy *s :Subsidy::Iterate()) { if(--s->remaining==0) { if(!s->IsAwarded()) { std::pair< NewsReferenceType, NewsReferenceType > reftype=SetupSubsidyDecodeParam(s, SubsidyDecodeParamType::NewsWithdrawn);AddNewsItem(STR_NEWS_OFFER_OF_SUBSIDY_EXPIRED, NT_SUBSIDIES, NF_NORMAL, reftype.first, s->src, reftype.second, s->dst);AI::BroadcastNewEvent(new ScriptEventSubsidyOfferExpired(s->index));Game::NewEvent(new ScriptEventSubsidyOfferExpired(s->index));} else { if(s->awarded==_local_company) { std::pair< NewsReferenceType, NewsReferenceType > reftype=SetupSubsidyDecodeParam(s, SubsidyDecodeParamType::NewsWithdrawn);AddNewsItem(STR_NEWS_SUBSIDY_WITHDRAWN_SERVICE, NT_SUBSIDIES, NF_NORMAL, reftype.first, s->src, reftype.second, s->dst);} AI::BroadcastNewEvent(new ScriptEventSubsidyExpired(s->index));Game::NewEvent(new ScriptEventSubsidyExpired(s->index));} delete s;modified=true;} } if(modified) { RebuildSubsidisedSourceAndDestinationCache();} else if(_settings_game.difficulty.subsidy_duration==0) { return;} else if(_settings_game.linkgraph.distribution_pax !=DT_MANUAL &&_settings_game.linkgraph.distribution_mail !=DT_MANUAL &&_settings_game.linkgraph.distribution_armoured !=DT_MANUAL &&_settings_game.linkgraph.distribution_default !=DT_MANUAL) { return;} bool passenger_subsidy=false;bool town_subsidy=false;bool industry_subsidy=false;int random_chance=RandomRange(16);if(random_chance< 2 &&_settings_game.linkgraph.distribution_pax==DT_MANUAL) { int n=1000;do { passenger_subsidy=FindSubsidyPassengerRoute();} while(!passenger_subsidy &&n--);} else if(random_chance==2) { int n=1000;do { town_subsidy=FindSubsidyTownCargoRoute();} while(!town_subsidy &&n--);} else if(random_chance==3) { int n=1000;do { industry_subsidy=FindSubsidyIndustryCargoRoute();} while(!industry_subsidy &&n--);} modified\|=passenger_subsidy\|\|town_subsidy\|\|industry_subsidy;if(modified) InvalidateWindowData(WC_SUBSIDIES_LIST, 0);})
	Perform the economy monthly update of open subsidies, and try to create a new one.

Detailed Description

Handling of subsidies.

Definition in file subsidy.cpp.

Function Documentation

◆ CheckSubsidised()

bool CheckSubsidised	(	CargoID	cargo_type,
		CompanyID	company,
		SourceType	src_type,
		SourceID	src,
		const Station *	st
	)

Tests whether given delivery is subsidised and possibly awards the subsidy to delivering company.

Parameters

cargo_type	type of cargo
company	company delivering the cargo
src_type	type of src
src	index of source
st	station where the cargo is delivered to

Returns: is the delivery subsidised?

Definition at line 564 of file subsidy.cpp.

References Town::cache, Station::catchment_tiles, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_industry_pool >::Get(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_town_pool >::Get(), include(), Station::industries_near, Industry, INVALID_SOURCE, INVALID_TILE, IsTileType(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_subsidy_pool >::Iterate(), MP_HOUSE, TownCache::part_of_subsidy, POS_DST, POS_SRC, BaseStation::rect, and Town.

◆ CheckSubsidyDistance()

static bool CheckSubsidyDistance	(	SourceType	src_type,
		SourceID	src,
		SourceType	dst_type,
		SourceID	dst
	)

static

Checks if the source and destination of a subsidy are inside the distance limit.

Parameters

src_type	Type of src.
src	Index of source.
dst_type	Type of dst.
dst	Index of destination.

Returns: True if they are inside the distance limit.

Definition at line 197 of file subsidy.cpp.

References DistanceManhattan(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_industry_pool >::Get(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_town_pool >::Get(), SUBSIDY_MAX_DISTANCE, and Town.

◆ CheckSubsidyDuplicate()

static bool CheckSubsidyDuplicate	(	CargoID	cargo,
		SourceType	src_type,
		SourceID	src,
		SourceType	dst_type,
		SourceID	dst
	)

static

Check whether a specific subsidy already exists.

Parameters

cargo	Cargo type.
src_type	Type of source of the cargo, affects interpretation of src.
src	Id of the source.
dst_type	Type of the destination of the cargo, affects interpretation of dst.
dst	Id of the destination.

Returns: true if the subsidy already exists, false if not.

Definition at line 177 of file subsidy.cpp.

References Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_subsidy_pool >::Iterate().

Referenced by FindSubsidyPassengerRoute().

◆ CmdCreateSubsidy()

CommandCost CmdCreateSubsidy	(	DoCommandFlag	flags,
		CargoID	cid,
		SourceType	src_type,
		SourceID	src,
		SourceType	dst_type,
		SourceID	dst
	)

Create a new subsidy.

Parameters

flags	type of operation
cid	CargoID of subsidy.
src_type	SourceType of source.
src	SourceID of source.
dst_type	SourceType of destination.
dst	SourceID of destination.

Returns: the cost of this operation or an error

Definition at line 244 of file subsidy.cpp.

References _current_company, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_subsidy_pool >::CanAllocateItem(), CMD_ERROR, CreateSubsidy(), DC_EXEC, CargoSpec::Get(), Industry, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_town_pool >::IsValidID(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_industry_pool >::IsValidID(), NUM_CARGO, OWNER_DEITY, and Town.

◆ CreateSubsidy()

void CreateSubsidy	(	CargoID	cid,
		SourceType	src_type,
		SourceID	src,
		SourceType	dst_type,
		SourceID	dst
	)

Creates a subsidy with the given parameters.

Parameters

cid	Subsidised cargo.
src_type	Type of src.
src	Index of source.
dst_type	Type of dst.
dst	Index of destination.

Definition at line 213 of file subsidy.cpp.

References AddNewsItem(), Subsidy::awarded, AI::BroadcastNewEvent(), Subsidy::cargo_type, Subsidy::dst, Subsidy::dst_type, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem< Tpool >::index, INVALID_COMPANY, InvalidateWindowData(), Game::NewEvent(), NewsOffered, NF_NORMAL, NT_SUBSIDIES, POS_DST, POS_SRC, Subsidy::remaining, SetPartOfSubsidyFlag(), SetupSubsidyDecodeParam(), Subsidy::src, Subsidy::src_type, SUBSIDY_OFFER_MONTHS, and WC_SUBSIDIES_LIST.

Referenced by CmdCreateSubsidy(), and FindSubsidyPassengerRoute().

◆ DeleteSubsidyWith()

void DeleteSubsidyWith	(	SourceType	type,
		SourceID	index
	)

Delete the subsidies associated with a given cargo source type and id.

Parameters

type	Cargo source type of the id.
index	Id to remove.

Definition at line 151 of file subsidy.cpp.

References InvalidateWindowData(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_subsidy_pool >::Iterate(), RebuildSubsidisedSourceAndDestinationCache(), and WC_SUBSIDIES_LIST.

Referenced by Town::~Town().

◆ FindSubsidyCargoDestination()

bool FindSubsidyCargoDestination	(	CargoID	cid,
		SourceType	src_type,
		SourceID	src
	)

Tries to find a suitable destination for the given source and cargo.

Parameters

cid	Subsidized cargo.
src_type	Type of src.
src	Index of source.

Returns: True iff the subsidy was created.

Definition at line 426 of file subsidy.cpp.

References Chance16(), OrthogonalTileArea::Expand(), Town::GetRandom(), Industry, IsTileType(), MP_HOUSE, SUBSIDY_TOWN_CARGO_RADIUS, Town, and Town::xy.

◆ FindSubsidyIndustryCargoRoute()

bool FindSubsidyIndustryCargoRoute ( )

Tries to create a cargo subsidy with an industry as source.

Returns: True iff the subsidy was created.

Definition at line 375 of file subsidy.cpp.

References Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_subsidy_pool >::CanAllocateItem(), Industry::GetRandom(), Industry, IsValidCargoID(), Industry::produced, and RandomRange().

◆ FindSubsidyPassengerRoute()

bool FindSubsidyPassengerRoute ( )

Tries to create a passenger subsidy between two towns.

Returns: True iff the subsidy was created.

Definition at line 284 of file subsidy.cpp.

References Town::cache, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_subsidy_pool >::CanAllocateItem(), CheckSubsidyDuplicate(), CreateSubsidy(), DistanceManhattan(), Town::GetRandom(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem< Tpool >::index, TownCache::population, RandomRange(), SUBSIDY_MAX_DISTANCE, SUBSIDY_MAX_PCT_TRANSPORTED, SUBSIDY_PAX_MIN_POPULATION, Town, CargoSpec::town_production_cargoes, TPE_PASSENGERS, and Town::xy.

◆ FindSubsidyTownCargoRoute()

bool FindSubsidyTownCargoRoute ( )

Tries to create a cargo subsidy with a town as source.

Returns: True iff the subsidy was created.

Definition at line 318 of file subsidy.cpp.

References Town::cache, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_subsidy_pool >::CanAllocateItem(), OrthogonalTileArea::Expand(), Town::GetRandom(), IsTileType(), MP_HOUSE, TownCache::population, SUBSIDY_CARGO_MIN_POPULATION, SUBSIDY_TOWN_CARGO_RADIUS, Town, and Town::xy.

◆ SetPartOfSubsidyFlag()

static void SetPartOfSubsidyFlag	(	SourceType	type,
		SourceID	index,
		PartOfSubsidy	flag
	)

inlinestatic

Sets a flag indicating that given town/industry is part of subsidised route.

Parameters

type	is it a town or an industry?
index	index of town/industry
flag	flag to set

Definition at line 124 of file subsidy.cpp.

References Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_town_pool >::Get(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_industry_pool >::Get(), Industry, and Town.

Referenced by CreateSubsidy(), and RebuildSubsidisedSourceAndDestinationCache().

◆ SetupSubsidyDecodeParam()

std::pair<NewsReferenceType, NewsReferenceType> SetupSubsidyDecodeParam	(	const Subsidy *	s,
		SubsidyDecodeParamType	mode,
		uint	parameter_offset
	)

Setup the string parameters for printing the subsidy at the screen, and compute the news reference for the subsidy.

Parameters

s	Subsidy being printed.
mode	Type of subsidy news message to decide on parameter format.
parameter_offset	The location/index in the String DParams to start decoding the subsidy's parameters. Defaults to 0.

Returns: Reference of the subsidy in the news system.

Definition at line 75 of file subsidy.cpp.

References Subsidy::cargo_type, CargoSpec::Get(), Industry, CargoSpec::name, NR_INDUSTRY, NR_NONE, NR_TOWN, SetDParam(), Subsidy::src_type, and Town.

Referenced by Subsidy::AwardTo(), and CreateSubsidy().

Functions

Variables

Detailed Description

Function Documentation

◆ CheckSubsidised()

◆ CheckSubsidyDistance()

◆ CheckSubsidyDuplicate()

◆ CmdCreateSubsidy()

◆ CreateSubsidy()

◆ DeleteSubsidyWith()

◆ FindSubsidyCargoDestination()

◆ FindSubsidyIndustryCargoRoute()

◆ FindSubsidyPassengerRoute()

◆ FindSubsidyTownCargoRoute()

◆ SetPartOfSubsidyFlag()

◆ SetupSubsidyDecodeParam()