# AITown Class Reference

Class that handles all town related functions. More...

`#include <ai_town.hpp>`

Inheritance diagram for AITown:

## Public Types
enum | TownAction { TOWN_ACTION_ADVERTISE_SMALL = 0, TOWN_ACTION_ADVERTISE_MEDIUM = 1, TOWN_ACTION_ADVERTISE_LARGE = 2, TOWN_ACTION_ROAD_REBUILD = 3, TOWN_ACTION_BUILD_STATUE = 4, TOWN_ACTION_FUND_BUILDINGS = 5, TOWN_ACTION_BUY_RIGHTS = 6, TOWN_ACTION_BRIBE = 7 }
| Actions that one can perform on a town. More...
enum | TownRating { TOWN_RATING_NONE, TOWN_RATING_APPALLING, TOWN_RATING_VERY_POOR, TOWN_RATING_POOR, TOWN_RATING_MEDIOCRE, TOWN_RATING_GOOD, TOWN_RATING_VERY_GOOD, TOWN_RATING_EXCELLENT, TOWN_RATING_OUTSTANDING, TOWN_RATING_INVALID = -1 }
| Different ratings one could have in a town. More...
enum | RoadLayout { ROAD_LAYOUT_ORIGINAL, ROAD_LAYOUT_BETTER_ROADS, ROAD_LAYOUT_2x2, ROAD_LAYOUT_3x3, ROAD_LAYOUT_INVALID = -1 }
| Possible layouts for the roads in a town. More...
## Static Public Member Functions
static const char * | GetClassName ()
static int32 | GetTownCount ()
| Gets the number of towns.
static bool | IsValidTown (TownID town_id)
| Checks whether the given town index is valid.
static char * | GetName (TownID town_id)
| Get the name of the town.
static int32 | GetPopulation (TownID town_id)
| Gets the number of inhabitants in the town.
static int32 | GetHouseCount (TownID town_id)
| Gets the number of houses in the town.
static TileIndex | GetLocation (TownID town_id)
| Gets the location of the town.
static int32 | GetLastMonthProduction (TownID town_id, CargoID cargo_id)
| Get the total last month's production of the given cargo at a town.
static int32 | GetLastMonthTransported (TownID town_id, CargoID cargo_id)
| Get the total amount of cargo transported from a town last month.
static int32 | GetLastMonthTransportedPercentage (TownID town_id, CargoID cargo_id)
| Get the percentage of transported production of the given cargo at a town.
static int32 | GetDistanceManhattanToTile (TownID town_id, TileIndex tile)
| Get the manhattan distance from the tile to the AITown::GetLocation() of the town.
static int32 | GetDistanceSquareToTile (TownID town_id, TileIndex tile)
| Get the square distance from the tile to the AITown::GetLocation() of the town.
static bool | IsWithinTownInfluence (TownID town_id, TileIndex tile)
| Find out if this tile is within the rating influence of a town.
static bool | HasStatue (TownID town_id)
| Find out if this town has a statue for the current company.
static int | GetRoadReworkDuration (TownID town_id)
| Find out how long the town is undergoing road reconstructions.
static AICompany::CompanyID | GetExclusiveRightsCompany (TownID town_id)
| Find out which company currently has the exclusive rights of this town.
static int32 | GetExclusiveRightsDuration (TownID town_id)
| Find out how long the town is under influence of the exclusive rights.
static bool | IsActionAvailable (TownID town_id, TownAction town_action)
| Find out if an action can currently be performed on the town.
static bool | PerformTownAction (TownID town_id, TownAction town_action)
| Perform a town action on this town.
static TownRating | GetRating (TownID town_id, AICompany::CompanyID company_id)
| Get the rating of a company within a town.
static int | GetAllowedNoise (TownID town_id)
| Get the maximum level of noise that still can be added by airports before the town start to refuse building a new airport.
static RoadLayout | GetRoadLayout (TownID town_id)
| Get the road layout for a town.

## Detailed Description

Class that handles all town related functions.

Definition at line 21 of file ai_town.hpp.

## Member Enumeration Documentation

enum AITown::TownAction

Actions that one can perform on a town.

Enumerator:

  TOWN_ACTION_ADVERTISE_SMALL | The cargo ratings temporary gains 25% of rating (in absolute percentage, so 10% becomes 35%, with a max of 99%) for all stations within 10 tiles.
  TOWN_ACTION_ADVERTISE_MEDIUM | The cargo ratings temporary gains 44% of rating (in absolute percentage, so 10% becomes 54%, with a max of 99%) for all stations within 15 tiles.
  TOWN_ACTION_ADVERTISE_LARGE | The cargo ratings temporary gains 63% of rating (in absolute percentage, so 10% becomes 73%, with a max of 99%) for all stations within 20 tiles.
  TOWN_ACTION_ROAD_REBUILD | Rebuild the roads of this town for 6 months.
  TOWN_ACTION_BUILD_STATUE | Build a statue in this town.
  TOWN_ACTION_FUND_BUILDINGS | Fund the creation of extra buildings for 3 months.
  TOWN_ACTION_BUY_RIGHTS | Buy exclusive rights for this town for 12 months.
  TOWN_ACTION_BRIBE | Bribe the town in order to get a higher rating.

Definition at line 28 of file ai_town.hpp.

enum AITown::TownRating

Different ratings one could have in a town.

Enumerator:

  TOWN_RATING_NONE | The company got no rating in the town.
  TOWN_RATING_APPALLING | The company got an appalling rating in the town .
  TOWN_RATING_VERY_POOR | The company got an very poor rating in the town.
  TOWN_RATING_POOR | The company got an poor rating in the town.
  TOWN_RATING_MEDIOCRE | The company got an mediocre rating in the town.
  TOWN_RATING_GOOD | The company got an good rating in the town.
  TOWN_RATING_VERY_GOOD | The company got an very good rating in the town.
  TOWN_RATING_EXCELLENT | The company got an excellent rating in the town.
  TOWN_RATING_OUTSTANDING | The company got an outstanding rating in the town.
  TOWN_RATING_INVALID | The town rating for invalid towns/companies.

Definition at line 81 of file ai_town.hpp.

enum AITown::RoadLayout

Possible layouts for the roads in a town.

Enumerator:

  ROAD_LAYOUT_ORIGINAL | Original algorithm (min. 1 distance between roads).
  ROAD_LAYOUT_BETTER_ROADS | Extended original algorithm (min. 2 distance between roads).
  ROAD_LAYOUT_2x2 | Geometric 2x2 grid algorithm.
  ROAD_LAYOUT_3x3 | Geometric 3x3 grid algorithm.
  ROAD_LAYOUT_INVALID | The layout for invalid towns.

Definition at line 97 of file ai_town.hpp.

## Member Function Documentation

int32 AITown::GetTownCount | ( |  | ) | `[static]`

Gets the number of towns.

Returns:
  The number of towns.

Postcondition:
  Return value is always non-negative.

Definition at line 22 of file ai_town.cpp.

bool AITown::IsValidTown | ( | TownID | town_id | ) | `[static]`

Checks whether the given town index is valid.

Parameters:

  | town_id | The index to check.

Returns:
  True if and only if the town is valid.

Definition at line 27 of file ai_town.cpp.

Referenced by GetAllowedNoise(), GetExclusiveRightsCompany(), GetExclusiveRightsDuration(), GetHouseCount(), GetLastMonthProduction(), GetLastMonthTransported(), GetLastMonthTransportedPercentage(), GetLocation(), GetName(), GetPopulation(), GetRating(), GetRoadLayout(), GetRoadReworkDuration(), HasStatue(), IsActionAvailable(), IsWithinTownInfluence(), and PerformTownAction().

char * AITown::GetName | ( | TownID | town_id | ) | `[static]`

Get the name of the town.

Parameters:

  | town_id | The town to get the name of.

Precondition:
  IsValidTown(town_id).

Returns:
  The name of the town.

Definition at line 32 of file ai_town.cpp.

References IsValidTown(), and SetDParam().

int32 AITown::GetPopulation | ( | TownID | town_id | ) | `[static]`

Gets the number of inhabitants in the town.

Parameters:

  | town_id | The town to get the population of.

Precondition:
  IsValidTown(town_id).

Returns:
  The number of inhabitants.

Postcondition:
  Return value is always non-negative.

Definition at line 44 of file ai_town.cpp.

References IsValidTown().

int32 AITown::GetHouseCount | ( | TownID | town_id | ) | `[static]`

Gets the number of houses in the town.

Parameters:

  | town_id | The town to get the number of houses of.

Precondition:
  IsValidTown(town_id).

Returns:
  The number of houses.

Postcondition:
  Return value is always non-negative.

Definition at line 51 of file ai_town.cpp.

References IsValidTown().

TileIndex AITown::GetLocation | ( | TownID | town_id | ) | `[static]`

Gets the location of the town.

Parameters:

  | town_id | The town to get the location of.

Precondition:
  IsValidTown(town_id).

Returns:
  The location of the town.

Definition at line 58 of file ai_town.cpp.

References INVALID_TILE, and IsValidTown().

Referenced by GetDistanceManhattanToTile(), and GetDistanceSquareToTile().

int32 AITown::GetLastMonthProduction | ( | TownID | town_id,
|  | CargoID | cargo_id |
| ) |  |  | `[static]`

Get the total last month's production of the given cargo at a town.

Parameters:

  | town_id | The index of the town.
  | cargo_id | The index of the cargo.

Precondition:
  IsValidTown(town_id).

  AICargo::IsValidCargo(cargo_id).

  AICargo::GetTownEffect(cargo_id) == TE_PASSENGERS || AICargo::GetTownEffect(cargo_id) == TE_MAIL.

Returns:
  The last month's production of the given cargo for this town.

Postcondition:
  Return value is always non-negative.

Definition at line 65 of file ai_town.cpp.

References AICargo::GetTownEffect(), AICargo::IsValidCargo(), IsValidTown(), AICargo::TE_MAIL, and AICargo::TE_PASSENGERS.

int32 AITown::GetLastMonthTransported | ( | TownID | town_id,
|  | CargoID | cargo_id |
| ) |  |  | `[static]`

Get the total amount of cargo transported from a town last month.

Parameters:

  | town_id | The index of the industry.
  | cargo_id | The index of the cargo.

Precondition:
  IsValidTown(town_id).

  AICargo::IsValidCargo(cargo_id).

  AICargo::GetTownEffect(cargo_id) == TE_PASSENGERS || AICargo::GetTownEffect(cargo_id) == TE_MAIL.

Returns:
  The amount of given cargo transported from this town last month.

Postcondition:
  Return value is always non-negative.

Definition at line 79 of file ai_town.cpp.

References AICargo::GetTownEffect(), AICargo::IsValidCargo(), IsValidTown(), AICargo::TE_MAIL, and AICargo::TE_PASSENGERS.

int32 AITown::GetLastMonthTransportedPercentage | ( | TownID | town_id,
|  | CargoID | cargo_id |
| ) |  |  | `[static]`

Get the percentage of transported production of the given cargo at a town.

Parameters:

  | town_id | The index of the town.
  | cargo_id | The index of the cargo.

Precondition:
  IsValidTown(town_id).

  AICargo::IsValidCargo(cargo_id).

  AICargo::GetTownEffect(cargo_id) == TE_PASSENGERS || AICargo::GetTownEffect(cargo_id) == TE_MAIL.

Returns:
  The percentage of given cargo transported from this town last month.

Postcondition:
  Return value is always non-negative.

Definition at line 93 of file ai_town.cpp.

References AICargo::GetTownEffect(), AICargo::IsValidCargo(), IsValidTown(), AICargo::TE_MAIL, AICargo::TE_PASSENGERS, and ToPercent8().

int32 AITown::GetDistanceManhattanToTile | ( | TownID | town_id,
|  | TileIndex | tile |
| ) |  |  | `[static]`

Get the manhattan distance from the tile to the AITown::GetLocation() of the town.

Parameters:

  | town_id | The town to get the distance to.
  | tile | The tile to get the distance to.

Precondition:
  IsValidTown(town_id).

Returns:
  The distance between town and tile.

Definition at line 107 of file ai_town.cpp.

References AIMap::DistanceManhattan(), and GetLocation().

int32 AITown::GetDistanceSquareToTile | ( | TownID | town_id,
|  | TileIndex | tile |
| ) |  |  | `[static]`

Get the square distance from the tile to the AITown::GetLocation() of the town.

Parameters:

  | town_id | The town to get the distance to.
  | tile | The tile to get the distance to.

Precondition:
  IsValidTown(town_id).

Returns:
  The distance between town and tile.

Definition at line 112 of file ai_town.cpp.

References AIMap::DistanceSquare(), and GetLocation().

Referenced by IsWithinTownInfluence().

bool AITown::IsWithinTownInfluence | ( | TownID | town_id,
|  | TileIndex | tile |
| ) |  |  | `[static]`

Find out if this tile is within the rating influence of a town.

Stations on this tile influence the rating of the town.

Parameters:

  | town_id | The town to check.
  | tile | The tile to check.

Precondition:
  IsValidTown(town_id).

Returns:
  True if the tile is within the rating influence of the town.

Definition at line 117 of file ai_town.cpp.

References GetDistanceSquareToTile(), and IsValidTown().

Referenced by AITile::IsWithinTownInfluence(), and AIStation::IsWithinTownInfluence().

bool AITown::HasStatue | ( | TownID | town_id | ) | `[static]`

Find out if this town has a statue for the current company.

Parameters:

  | town_id | The town to check.

Precondition:
  IsValidTown(town_id).

Returns:
  True if the town has a statue.

Definition at line 125 of file ai_town.cpp.

References HasBit(), and IsValidTown().

int AITown::GetRoadReworkDuration | ( | TownID | town_id | ) | `[static]`

Find out how long the town is undergoing road reconstructions.

Parameters:

  | town_id | The town to check.

Precondition:
  IsValidTown(town_id).

Returns:
  The number of months the road reworks are still going to take. The value 0 means that there are currently no road reworks.

Definition at line 132 of file ai_town.cpp.

References IsValidTown().

AICompany::CompanyID AITown::GetExclusiveRightsCompany | ( | TownID | town_id | ) | `[static]`

Find out which company currently has the exclusive rights of this town.

Parameters:

  | town_id | The town to check.

Precondition:
  IsValidTown(town_id).

Returns:
  The company that has the exclusive rights. The value AICompany::COMPANY_INVALID means that there are currently no exclusive rights given out to anyone.

Definition at line 139 of file ai_town.cpp.

References AICompany::COMPANY_INVALID, and IsValidTown().

int32 AITown::GetExclusiveRightsDuration | ( | TownID | town_id | ) | `[static]`

Find out how long the town is under influence of the exclusive rights.

Parameters:

  | town_id | The town to check.

Precondition:
  IsValidTown(town_id).

Returns:
  The number of months the exclusive rights hold. The value 0 means that there are currently no exclusive rights given out to anyone.

Definition at line 146 of file ai_town.cpp.

References IsValidTown().

bool AITown::IsActionAvailable | ( | TownID | town_id,
|  | TownAction | town_action |
| ) |  |  | `[static]`

Find out if an action can currently be performed on the town.

Parameters:

  | town_id | The town to perform the action on.
  | town_action | The action to perform on the town.

Precondition:
  IsValidTown(town_id).

Returns:
  True if and only if the action can performed.

Definition at line 153 of file ai_town.cpp.

References GetMaskOfTownActions(), HasBit(), and IsValidTown().

Referenced by PerformTownAction().

bool AITown::PerformTownAction | ( | TownID | town_id,
|  | TownAction | town_action |
| ) |  |  | `[static]`

Perform a town action on this town.

Parameters:

  | town_id | The town to perform the action on.
  | town_action | The action to perform on the town.

Precondition:
  IsValidTown(town_id).

  IsActionAvailable(town_id, town_action).

Returns:
  True if the action succeeded.

Definition at line 160 of file ai_town.cpp.

References CMD_DO_TOWN_ACTION, AIObject::DoCommand(), EnforcePrecondition, IsActionAvailable(), and IsValidTown().

AITown::TownRating AITown::GetRating | ( | TownID | town_id,
|  | AICompany::CompanyID | company_id |
| ) |  |  | `[static]`

Get the rating of a company within a town.

Parameters:

  | town_id | The town to get the rating for.
  | company_id | The company to get the rating for.

Precondition:
  IsValidTown(town_id).

  AICompany.ResolveCompanyID(company) != AICompany::COMPANY_INVALID.

Returns:
  The rating as shown to humans.

Definition at line 168 of file ai_town.cpp.

References AICompany::COMPANY_INVALID, HasBit(), IsValidTown(), max(), AICompany::ResolveCompanyID(), TOWN_RATING_APPALLING, TOWN_RATING_INVALID, and TOWN_RATING_NONE.

int AITown::GetAllowedNoise | ( | TownID | town_id | ) | `[static]`

Get the maximum level of noise that still can be added by airports before the town start to refuse building a new airport.

Parameters:

  | town_id | The town to get the allowed noise from.

Returns:
  The noise that still can be added.

Definition at line 179 of file ai_town.cpp.

References _settings_game, Station::airport_type, GameSettings::economy, FACIL_AIRPORT, BaseStation::facilities, IsValidTown(), max(), EconomySettings::station_noise_level, and BaseStation::town.

AITown::RoadLayout AITown::GetRoadLayout | ( | TownID | town_id | ) | `[static]`

Get the road layout for a town.

Parameters:

  | town_id | The town to get the road layout from.

Returns:
  The RoadLayout for the town.

Definition at line 196 of file ai_town.cpp.

References IsValidTown(), and ROAD_LAYOUT_INVALID.

The documentation for this class was generated from the following files:

- src/ai/api/ai_town.hpp
- src/ai/api/ai_town.cpp