/// <summary>
/// Creates an unit system from the given prototype. This can be useful when
/// e.g. extending one of the standard unit systems with custom units.
/// If the prototype is an UnitSystem the created unit system will be an
/// identical copy of the unit system. If not, only units that are convertible
/// to the base unit will be added.
/// </summary>
/// <param name="prototype"></param>
/// <returns></returns>
public static UnitSystem CreateFrom(IUnitSystem prototype)
{
if (prototype is UnitSystem)
{
return((UnitSystem)((UnitSystem)prototype).Clone());
}
UnitSystem system = new UnitSystem();
foreach (IDimension dimension in prototype.Dimensions)
{
system.AddDimension(dimension);
// Register base unit
IUnit baseUnit = prototype.GetBaseUnit(dimension);
system.AddBaseUnit(baseUnit);
// Register scaled units
foreach (IUnit unit in prototype.GetSupportedUnits(dimension))
{
if (!ReferenceEquals(unit, baseUnit) && prototype.CanConvert(baseUnit, unit))
{
system.AddScaledUnit(baseUnit, unit, prototype.CreateConverter(baseUnit, unit));
}
}
}
return(system);
}
