Function ProcessConditionalOrder

src/order_cmd.cpp:1919–1940

* Process a conditional order and determine the next order. * @param order the order the vehicle currently has * @param v the vehicle to update * @return index of next order to jump to, or INVALID_VEH_ORDER_ID to use the next order */

 * @return index of next order to jump to, or INVALID_VEH_ORDER_ID to use the next order
 */
VehicleOrderID ProcessConditionalOrder(const Order *order, const Vehicle *v)
{
	if (order->GetType() != OT_CONDITIONAL) return INVALID_VEH_ORDER_ID;

	bool skip_order = false;
	OrderConditionComparator occ = order->GetConditionComparator();
	uint16_t value = order->GetConditionValue();

	switch (order->GetConditionVariable()) {
		case OrderConditionVariable::LoadPercentage: skip_order = OrderConditionCompare(occ, CalcPercentVehicleFilled(v, nullptr), value); break;
		case OrderConditionVariable::Reliability: skip_order = OrderConditionCompare(occ, ToPercent16(v->reliability), value); break;
		case OrderConditionVariable::MaxReliability: skip_order = OrderConditionCompare(occ, ToPercent16(v->GetEngine()->reliability), value); break;
		case OrderConditionVariable::MaxSpeed: skip_order = OrderConditionCompare(occ, v->GetDisplayMaxSpeed() * 10 / 16, value); break;
		case OrderConditionVariable::Age: skip_order = OrderConditionCompare(occ, TimerGameCalendar::DateToYear(v->age), value); break;
		case OrderConditionVariable::RequiresService: skip_order = OrderConditionCompare(occ, v->NeedsServicing(), value); break;
		case OrderConditionVariable::Unconditionally: skip_order = true; break;
		case OrderConditionVariable::RemainingLifetime: skip_order = OrderConditionCompare(occ, std::max(TimerGameCalendar::DateToYear(v->max_age - v->age + CalendarTime::DAYS_IN_LEAP_YEAR - 1), TimerGameCalendar::Year(0)), value); break;
		default: NOT_REACHED();
	}

	return skip_order ? order->GetConditionSkipToOrder() : (VehicleOrderID)INVALID_VEH_ORDER_ID;
}

/**
 * Update the vehicle's destination tile from an order.