Openhab humidex calculation rule for Turkey

weather.rules

import org.eclipse.smarthome.core.library.types.DecimalType

rule "Hissedilen sicakligi hesapla"
when
	Item sensor_sicaklik changed or
	Item sensor_nem changed
then
	var double sonuc
	var double sicaklik
	var double sicaklikF
	var double sicaklikF2
	var double nem
	var double nem2
	
	sicaklik = 0
	nem = 0
	
	
	if (sensor_sicaklik.state instanceof DecimalType) {
		sicaklik = (sensor_sicaklik.state as DecimalType).doubleValue
	}
	
	if (sensor_nem.state instanceof DecimalType) {
		nem = (sensor_nem.state as DecimalType).doubleValue
	}
	
	sicaklikF = (sicaklik * 1.8) + 32
	sicaklikF2 = Math::pow(sicaklikF,2)
	nem2 = Math::pow(nem,2)

 	sonuc = ((0 - 42.379 + 2.04901523 * sicaklikF + 10.1433127 * nem - 0.22475541 * sicaklikF * nem - 0.00683783 * sicaklikF2 - 0.05481717 * nem2 + 0.00122874 * sicaklikF2 * nem + 0.00085282 * sicaklikF * nem2 - 0.00000199 * sicaklikF2 * nem2) - 32.0) / 1.8

	sicaklik_hissedilen.postUpdate(sonuc)
end