town.h File Reference

Base of the town class. More...

#include "core/pool_type.hpp"
#include "viewport_type.h"
#include "command_type.h"
#include "town_map.h"
#include "subsidy_type.h"

Go to the source code of this file.

Data Structures

struct  BuildingCounts< T >
struct  Town
 Town data structure. More...

Defines

#define FOR_ALL_TOWNS_FROM(var, start)   FOR_ALL_ITEMS_FROM(Town, town_index, var, start)
#define FOR_ALL_TOWNS(var)   FOR_ALL_TOWNS_FROM(var, 0)

Typedefs

typedef Pool< Town, TownID, 64, 64000 > TownPool

Enumerations

enum  TownRatingCheckType { ROAD_REMOVE = 0, TUNNELBRIDGE_REMOVE = 1, TOWN_RATING_CHECK_TYPE_COUNT }
 

Action types that a company must ask permission for to a town authority.

More...
enum  TownFlags { TOWN_IS_FUNDED = 0, TOWN_HAS_CHURCH = 1, TOWN_HAS_STADIUM = 2 }
 

This enum is used in conjunction with town->flags.

More...
enum  TownActions {
  TACT_NONE = 0x00, TACT_ADVERTISE_SMALL = 0x01, TACT_ADVERTISE_MEDIUM = 0x02, TACT_ADVERTISE_LARGE = 0x04,
  TACT_ROAD_REBUILD = 0x08, TACT_BUILD_STATUE = 0x10, TACT_FOUND_BUILDINGS = 0x20, TACT_BUY_RIGHTS = 0x40,
  TACT_BRIBE = 0x80, TACT_COUNT = 8, TACT_ADVERTISE = TACT_ADVERTISE_SMALL | TACT_ADVERTISE_MEDIUM | TACT_ADVERTISE_LARGE, TACT_CONSTRUCTION = TACT_ROAD_REBUILD | TACT_BUILD_STATUE | TACT_FOUND_BUILDINGS,
  TACT_FUNDS = TACT_BUY_RIGHTS | TACT_BRIBE, TACT_ALL = TACT_ADVERTISE | TACT_CONSTRUCTION | TACT_FUNDS
}
 

Town actions of a company.

More...

Functions

uint32 GetWorldPopulation ()
 Determines the world population Basically, count population of all towns, one by one.
void UpdateAllTownVirtCoords ()
 Update the virtual coords needed to draw the town sign for all towns.
void ShowTownViewWindow (TownID town)
void ExpandTown (Town *t)
CommandCost CheckforTownRating (DoCommandFlag flags, Town *t, TownRatingCheckType type)
 Does the town authority allow the (destructive) action of the current company?
TileIndexDiff GetHouseNorthPart (HouseID &house)
 Determines if a given HouseID is part of a multitile house.
TownCalcClosestTownFromTile (TileIndex tile, uint threshold=UINT_MAX)
 Return the town closest to the given tile within threshold.
void ResetHouses ()
void ClearTownHouse (Town *t, TileIndex tile)
void UpdateTownMaxPass (Town *t)
void UpdateTownRadius (Town *t)
CommandCost CheckIfAuthorityAllowsNewStation (TileIndex tile, DoCommandFlag flags)
 Checks whether the local authority allows construction of a new station (rail, road, airport, dock) on the given tile.
TownClosestTownFromTile (TileIndex tile, uint threshold)
 Return the town closest (in distance or ownership) to a given tile, within a given threshold.
void ChangeTownRating (Town *t, int add, int max, DoCommandFlag flags)
 Changes town rating of the current company.
HouseZonesBits GetTownRadiusGroup (const Town *t, TileIndex tile)
 Returns the bit corresponding to the town zone of the specified tile.
void SetTownRatingTestMode (bool mode)
 Switch the town rating to test-mode, to allow commands to be tested without affecting current ratings.
uint GetMaskOfTownActions (int *nump, CompanyID cid, const Town *t)
 Get a list of available actions to do at a town.
bool GenerateTowns (TownLayout layout)
 This function will generate a certain amount of towns, with a certain layout It can be called from the scenario editor (i.e.
template<class T >
void MakeDefaultName (T *obj)
 Set the default name for a depot/waypoint.

Variables

static const uint CUSTOM_TOWN_NUMBER_DIFFICULTY = 4
 value for custom town number in difficulty settings
static const uint CUSTOM_TOWN_MAX_NUMBER = 5000
 this is the maximum number of towns a user can specify in customisation
static const uint INVALID_TOWN = 0xFFFF
TownPool _town_pool
static const byte TOWN_GROWTH_FREQUENCY = 70
 This is the number of ticks between towns being processed for building new houses or roads.
const byte _town_action_costs [TACT_COUNT]
 Factor in the cost of each town action.
TownID _new_town_id

Detailed Description

Base of the town class.

Definition in file town.h.


Enumeration Type Documentation

Town actions of a company.

Enumerator:
TACT_NONE 

Empty action set.

TACT_ADVERTISE_SMALL 

Small advertising campaign.

TACT_ADVERTISE_MEDIUM 

Medium advertising campaign.

TACT_ADVERTISE_LARGE 

Large advertising campaign.

TACT_ROAD_REBUILD 

Rebuild the roads.

TACT_BUILD_STATUE 

Build a statue.

TACT_FOUND_BUILDINGS 

Found new buildings.

TACT_BUY_RIGHTS 

Buy exclusive transport rights.

TACT_BRIBE 

Try to bribe the counsil.

TACT_COUNT 

Number of available town actions.

TACT_ADVERTISE 

All possible advertising actions.

TACT_CONSTRUCTION 

All possible construction actions.

TACT_FUNDS 

All possible funding actions.

TACT_ALL 

All possible actions.

Definition at line 211 of file town.h.

enum TownFlags

This enum is used in conjunction with town->flags.

IT simply states what bit is used for. It is pretty unrealistic (IMHO) to only have one church/stadium per town, NO MATTER the population of it. And there are 5 more bits available on flags...

Enumerator:
TOWN_IS_FUNDED 

Town has received some funds for.

TOWN_HAS_CHURCH 

There can be only one church by town.

TOWN_HAS_STADIUM 

There can be only one stadium by town.

Definition at line 180 of file town.h.

Action types that a company must ask permission for to a town authority.

See also:
CheckforTownRating
Enumerator:
ROAD_REMOVE 

Removal of a road owned by the town.

TUNNELBRIDGE_REMOVE 

Removal of a tunnel or bridge owned by the towb.

TOWN_RATING_CHECK_TYPE_COUNT 

Number of town checking action types.

Definition at line 160 of file town.h.


Function Documentation

Town* CalcClosestTownFromTile ( TileIndex  tile,
uint  threshold 
)

Return the town closest to the given tile within threshold.

Parameters:
tile Starting point of the search.
threshold Biggest allowed distance to the town.
Returns:
Closest town to tile within threshold, or NULL if there is no such town.
Note:
This function only uses distance, the ClosestTownFromTile function also takes town ownership into account.

Definition at line 2821 of file town_cmd.cpp.

References DistanceManhattan().

Referenced by BuildObject(), ClosestTownFromTile(), CmdBuildRoad(), Town::PostDestructor(), RemoveRoad(), and UpdateNearestTownForRoadTiles().

void ChangeTownRating ( Town t,
int  add,
int  max,
DoCommandFlag  flags 
)

Changes town rating of the current company.

Parameters:
t Town to affect
add Value to add
max Minimum (add < 0) resp. maximum (add > 0) rating that should be achievable with this change.
flags Command flags, especially DC_NO_MODIFY_TOWN_RATING is tested

Definition at line 2925 of file town_cmd.cpp.

References _current_company, DC_NO_MODIFY_TOWN_RATING, GetRating(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem< Tpool >::index, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem<&_company_pool >::IsValidID(), Cheats::magic_bulldozer, Town::ratings, SetBit(), SetWindowDirty(), and Cheat::value.

Referenced by CheckAllowRemoveRoad(), CmdPlantTree(), DoClearBridge(), and DoClearTunnel().

CommandCost CheckforTownRating ( DoCommandFlag  flags,
Town t,
TownRatingCheckType  type 
)
CommandCost CheckIfAuthorityAllowsNewStation ( TileIndex  tile,
DoCommandFlag  flags 
)

Checks whether the local authority allows construction of a new station (rail, road, airport, dock) on the given tile.

Parameters:
tile The tile where the station shall be constructed.
flags Command flags. DC_NO_TEST_TOWN_RATING is tested.
Returns:
Succeeded or failed command.

Definition at line 2800 of file town_cmd.cpp.

References _current_company, _settings_game, ClosestTownFromTile(), DC_NO_TEST_TOWN_RATING, EconomySettings::dist_local_authority, GameSettings::economy, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem< Tpool >::index, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem<&_company_pool >::IsValidID(), Town::ratings, return_cmd_error, and SetDParam().

Referenced by CmdBuildAirport(), CmdBuildDock(), CmdBuildRailStation(), and CmdBuildRoadStop().

Town* ClosestTownFromTile ( TileIndex  tile,
uint  threshold 
)
bool GenerateTowns ( TownLayout  layout  ) 

This function will generate a certain amount of towns, with a certain layout It can be called from the scenario editor (i.e.

: generate Random Towns) as well as from world creation.

Parameters:
layout which towns will be set to, when created
Returns:
true if towns have been successfully created

Definition at line 1774 of file town_cmd.cpp.

References _settings_game, Chance16(), GameCreationSettings::custom_town_number, CUSTOM_TOWN_NUMBER_DIFFICULTY, GameSettings::difficulty, GameSettings::economy, GameSettings::game_creation, GenerateTownName(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem<&_town_pool >::GetNumItems(), GWP_TOWN, IncreaseGeneratingWorldProgress(), EconomySettings::larger_towns, DifficultySettings::number_towns, ScaleByMapSize(), SetGeneratingWorldProgress(), and TSZ_RANDOM.

Referenced by _GenerateWorld(), and FoundTownWindow::OnClick().

TileIndexDiff GetHouseNorthPart ( HouseID &  house  ) 

Determines if a given HouseID is part of a multitile house.

The given ID is set to the ID of the north tile and the TileDiff to the north tile is returned.

Parameters:
house Is changed to the HouseID of the north tile of the same house
Returns:
TileDiff from the tile of the given HouseID to the north tile

Definition at line 2234 of file town_cmd.cpp.

References TileDiffXY().

Referenced by GetDistanceFromNearbyHouse(), SearchNearbyHouseClass(), SearchNearbyHouseGRFID(), SearchNearbyHouseID(), and UpdateHousesAndTowns().

uint GetMaskOfTownActions ( int *  nump,
CompanyID  cid,
const Town t 
)

Get a list of available actions to do at a town.

Parameters:
nump if not NULL add put the number of available actions in it
cid the company that is querying the town
t the town that is queried
Returns:
bitmasked value of enabled actions

Definition at line 2620 of file town_cmd.cpp.

References _settings_game, EconomySettings::bribe, COMPANY_SPECTATOR, GameSettings::economy, EconomySettings::exclusive_rights, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem<&_company_pool >::Get(), HasBit(), lengthof, Town::ratings, TACT_BRIBE, TACT_BUILD_STATUE, TACT_BUY_RIGHTS, TACT_NONE, and Town::unwanted.

Referenced by CmdDoTownAction(), TownAuthorityWindow::DrawWidget(), AITown::IsActionAvailable(), TownAuthorityWindow::OnClick(), and TownAuthorityWindow::OnPaint().

HouseZonesBits GetTownRadiusGroup ( const Town t,
TileIndex  tile 
)

Returns the bit corresponding to the town zone of the specified tile.

Parameters:
t Town on which town zone is to be found
tile TileIndex where town zone needs to be found
Returns:
the bit position of the given zone, as defined in HouseZones

Definition at line 1820 of file town_cmd.cpp.

References DistanceSquare().

Referenced by BuildTownHouse(), HouseGetVariable(), IndustryGetVariable(), and ObjectGetVariable().

uint32 GetWorldPopulation (  ) 

Determines the world population Basically, count population of all towns, one by one.

Returns:
uint32 the calculated population of the world

Definition at line 391 of file town_cmd.cpp.

Referenced by TownDirectoryWindow::SetStringParameters().

template<class T >
void MakeDefaultName ( T *  obj  )  [inline]

Set the default name for a depot/waypoint.

Template Parameters:
T The type/class to make a default name for
Parameters:
obj The object/instance we want to find the name for

Definition at line 241 of file town.h.

References ClosestTownFromTile(), HasBit(), and SetBit().

Referenced by CmdBuildBuoy(), CmdBuildRailWaypoint(), CmdBuildRoadDepot(), CmdBuildShipDepot(), CmdBuildTrainDepot(), and CmdRenameDepot().

void SetTownRatingTestMode ( bool  mode  ) 

Switch the town rating to test-mode, to allow commands to be tested without affecting current ratings.

The function is safe to use in nested calls.

Parameters:
mode Test mode switch (true means go to test-mode, false means leave test-mode).

Definition at line 2887 of file town_cmd.cpp.

References SmallVector< SmallPair< T, U >, S >::Clear().

Referenced by DoCommand(), and DoCommandPInternal().

void UpdateAllTownVirtCoords (  ) 

Update the virtual coords needed to draw the town sign for all towns.

Definition at line 363 of file town_cmd.cpp.

References Town::UpdateVirtCoord().

Referenced by UpdateAllVirtCoords().


Variable Documentation

const byte _town_action_costs[TACT_COUNT]

Factor in the cost of each town action.

See also:
TownActions

Definition at line 2442 of file town_cmd.cpp.

Referenced by TownAuthorityWindow::DrawWidget(), and TownAuthorityWindow::UpdateWidgetSize().

const byte TOWN_GROWTH_FREQUENCY = 70 [static]

This is the number of ticks between towns being processed for building new houses or roads.

This value originally came from the size of the town array in TTD.

Definition at line 171 of file town.h.


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