Timer that is increased every 27ms, and counts towards ticks / days / months / years. More...

#include <timer_game_calendar.h>

Inheritance diagram for TimerGameCalendar:

Static Public Member Functions
static YearMonthDay	ConvertDateToYMD (Date date)
	Converts a Date to a Year, Month & Day. More...

static Date	ConvertYMDToDate (Year year, Month month, Day day)
	Converts a tuple of Year, Month and Day to a Date. More...

static void	SetDate (Date date, DateFract fract)
	Set the date. More...

Static Public Member Functions inherited from TimerGame< struct Calendar >
static constexpr bool	IsLeapYear (Year year)
	Checks whether the given year is a leap year or not. More...

static YearMonthDay	CalendarConvertDateToYMD (Date date)
	Converts a Date to a Year, Month & Day. More...

static Date	CalendarConvertYMDToDate (Year year, Month month, Day day)
	Converts a tuple of Year, Month and Day to a Date. More...

static constexpr Year	DateToYear (Date date)
	Calculate the year of a given date. More...

static constexpr Date	DateAtStartOfYear (Year year)
	Calculate the date of the first day of a given year. More...

Static Public Attributes
static Year	year = {}
	Current year, starting at 0. More...

static Month	month = {}
	Current month (0..11).

static Date	date = {}
	Current date in days (day counter).

static DateFract	date_fract = {}
	Fractional part of the day.

static uint16_t	sub_date_fract = {}
	Subpart of date_fract that we use when calendar days are slower than economy days.

Additional Inherited Members
Public Types inherited from TimerGame< struct Calendar >
enum	Trigger

enum	Priority

using	Date = StrongType::Typedef< int32_t, DateTag< struct Calendar >, StrongType::Compare, StrongType::Integer >

using	DateFract = uint16_t
	The fraction of a date we're in, i.e. More...

using	Year = StrongType::Typedef< int32_t, struct YearTag< struct Calendar >, StrongType::Compare, StrongType::Integer >

using	Month = uint8_t
	Type for the month, note: 0 based, i.e. More...

using	Day = uint8_t
	Type for the day of the month, note: 1 based, first day of a month is 1.

using	TElapsed = uint

Detailed Description

Timer that is increased every 27ms, and counts towards ticks / days / months / years.

The amount of days in a month depends on the month and year (leap-years). There are always 74 ticks in a day (and with 27ms, this makes 1 day 1.998 seconds).

Calendar time is used for technology and time-of-year changes, including:

Vehicle, airport, station, object introduction and obsolescence
NewGRF variables for visual styles or behavior based on year or time of year (e.g. variable snow line)
Inflation, since it is tied to original game years. One interpretation of inflation is that it compensates for faster and higher capacity vehicles, another is that it compensates for more established companies. Each of these point to a different choice of calendar versus economy time, but we have to pick one so we follow a previous decision to tie inflation to original TTD game years.

Definition at line 30 of file timer_game_calendar.h.

Member Function Documentation

◆ ConvertDateToYMD()

TimerGameCalendar::YearMonthDay TimerGameCalendar::ConvertDateToYMD ( Date date )

static

Converts a Date to a Year, Month & Day.

Parameters

date	the date to convert from

Returns: YearMonthDay representation of the Date.

Definition at line 42 of file timer_game_calendar.cpp.

References TimerGame< struct Calendar >::CalendarConvertDateToYMD(), and date.

Referenced by ClickChangeDateCheat(), GetGlobalVariable(), GetSnowLine(), SetDate(), SetYearEngineAgingStops(), StartupEngines(), SurveyRecentNews(), and SurveyTimers().

◆ ConvertYMDToDate()

TimerGameCalendar::Date TimerGameCalendar::ConvertYMDToDate	(	Year	year,
		Month	month,
		Day	day
	)

static

Converts a tuple of Year, Month and Day to a Date.

Parameters

year	is a number between 0..MAX_YEAR
month	is a number between 0..11
day	is a number between 1..31

Returns: The equivalent date.

Definition at line 55 of file timer_game_calendar.cpp.

References TimerGame< struct Calendar >::CalendarConvertYMDToDate(), month, and year.

Referenced by ClickChangeDateCheat(), GetGlobalVariable(), LoadNewGRF(), ServerNetworkAdminSocketHandler::SendWelcome(), SetStartingYear(), and StartupEngines().

◆ SetDate()

void TimerGameCalendar::SetDate	(	Date	date,
		DateFract	fract
	)

static

Set the date.

Parameters

date	New date
fract	The number of ticks that have passed on this date.

Definition at line 66 of file timer_game_calendar.cpp.

References ConvertDateToYMD(), date, date_fract, Ticks::DAY_TICKS, month, and year.

Referenced by ClickChangeDateCheat(), and SetStartingYear().

Field Documentation

◆ year

TimerGameCalendar::Year TimerGameCalendar::year = {}

static

Current year, starting at 0.

Calendar time is used for technology and time-of-year changes, including:

Vehicle, airport, station, object introduction and obsolescence
Vehicle and engine age
NewGRF variables for visual styles or behavior based on year or time of year (e.g. variable snow line)
Inflation, since it is tied to original game years. One interpretation of inflation is that it compensates for faster and higher capacity vehicles, another is that it compensates for more established companies. Each of these point to a different choice of calendar versus economy time, but we have to pick one so we follow a previous decision to tie inflation to original TTD game years.

Definition at line 32 of file timer_game_calendar.h.

Referenced by CalendarEnginesMonthlyLoop(), CheckBridgeAvailability(), ClickChangeDateCheat(), ConvertYMDToDate(), GetGlobalVariable(), GetMaskOfAllowedCurrencies(), VehicleScopeResolver::GetVariable(), AirportSpec::IsAvailable(), LoadNewGRF(), NetworkCheckRestartMapYear(), NewsItem::NewsItem(), ResetSignalVariant(), and SetDate().

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

src/timer/timer_game_calendar.h
src/timer/timer_game_calendar.cpp

Static Public Member Functions

Static Public Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ ConvertDateToYMD()

◆ ConvertYMDToDate()

◆ SetDate()

Field Documentation

◆ year