public static float ToKelvin(float t, TemeratureUnits from)
{
switch (from)
{
case TemeratureUnits.C:
return(t + ZERO_CELSIUS_IN_KELVIN);
case TemeratureUnits.K:
return(t);
case TemeratureUnits.F:
return((t + 459.67f) * (5f / 9f));
}
return(t);
}
public static float FromKelvin(float t, TemeratureUnits to)
{
switch (to)
{
case TemeratureUnits.C:
return(t - ZERO_CELSIUS_IN_KELVIN);
case TemeratureUnits.K:
return(t);
case TemeratureUnits.F:
return(t * (9f / 5f) - 459.67f);
}
return(t);
}
public static float Transform(float t, TemeratureUnits from, TemeratureUnits to)
{
if (from == to)
{
return(t);
}
float ret = t;
// transform to kelvins
if (from != TemeratureUnits.K)
{
ret = ToKelvin(t, from);
}
// now transform to desired
if (to != TemeratureUnits.K)
{
ret = FromKelvin(t, to);
}
return(ret);
}
public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
{
var type = property.propertyType;
if (type != SerializedPropertyType.Float)
{
EditorGUI.PropertyField(position, property, label);
return;
}
var enumRect = new Rect(position.x + position.width - SelectorSize, position.y,
SelectorSize, position.height);
selectedUnit = (TemeratureUnits)EditorGUI.EnumPopup(enumRect, selectedUnit);
var tempK = property.floatValue;
if (tempK < 0)
{
// you can't get lower than absolute zero
tempK = 0f;
}
var temp = TemperatureUtils.FromKelvin(tempK, selectedUnit);
var propRect = new Rect(position.x, position.y,
position.width - SelectorSize, position.height);
var newTemp = EditorGUI.FloatField(propRect, label, temp);
var newTempK = TemperatureUtils.ToKelvin(newTemp, selectedUnit);
if (Mathf.Abs(newTempK - tempK) > 0.001f)
{
// temperature has changed - update it
property.floatValue = TemperatureUtils.ToKelvin(newTemp, selectedUnit);
}
}
