Function StartupEngines

src/engine.cpp:798–823

* Start/initialise all our engines. Must be called whenever there are changes * to the NewGRF config. */

 * to the NewGRF config.
 */
void StartupEngines()
{
	/* Aging of vehicles stops, so account for that when starting late */
	const TimerGameCalendar::Date aging_date = std::min(TimerGameCalendar::date, TimerGameCalendar::ConvertYMDToDate(_year_engine_aging_stops, 0, 1));
	TimerGameCalendar::YearMonthDay aging_ymd = TimerGameCalendar::ConvertDateToYMD(aging_date);
	uint32_t seed = Random();

	for (Engine *e : Engine::Iterate()) {
		StartupOneEngine(e, aging_ymd, seed);
	}
	for (Engine *e : Engine::Iterate()) {
		CalcEngineReliability(e, false);
	}

	/* Update the bitmasks for the vehicle lists */
	for (Company *c : Company::Iterate()) {
		c->avail_railtypes = GetCompanyRailTypes(c->index);
		c->avail_roadtypes = GetCompanyRoadTypes(c->index);
	}

	/* Invalidate any open purchase lists */
	InvalidateWindowClassesData(WC_BUILD_VEHICLE);

	SetWindowClassesDirty(WC_BUILD_VEHICLE);
	SetWindowClassesDirty(WC_REPLACE_VEHICLE);
}

/**
 * Allows engine \a eid to be used by a company \a company.