public static bool IsInverse(Quantity left, Quantity right)
{
var leftParts = UnitParts.CreateFrom(left);
var rightParts = UnitParts.CreateFrom(right);
return(leftParts.Flattened.SequenceEqual(rightParts.Flattened.Select(x => x ^ -1)));
}
public static Quantity FindRight(Settings settings, Quantity left, Quantity result)
{
var derivedUnit = result.Unit as DerivedUnit;
if (derivedUnit != null)
{
var right = UnitParts.CreateFrom(result) / UnitParts.CreateFrom(left);
return(Find(settings, right.Flattened.ToArray()));
}
else
{
var right = UnitParts.CreateFrom(left) / UnitParts.CreateFrom(result);
return(Find(settings, right.Flattened.ToArray()));
}
}
/// <summary>
/// Solves left * right^x = result
/// Where x =±1
/// </summary>
/// <param name="left"></param>
/// <param name="right"></param>
/// <param name="result"></param>
/// <returns></returns>
private int FindPower(Quantity left, Quantity right, Quantity result)
{
var leftParts = UnitParts.CreateFrom(left);
var rightParts = UnitParts.CreateFrom(right);
var resultParts = UnitParts.CreateFrom(result);
if (leftParts * rightParts == resultParts)
{
return(1);
}
if (leftParts / rightParts == resultParts)
{
return(-1);
}
else
{
throw new ArgumentException(string.Format("Cound not find power for {0}*{1}^x == {2}",
left.ClassName,
right.ClassName,
result.ClassName));
}
//SiUnit siUnit = left.Unit as SiUnit;
//if (siUnit != null)
//{
// var unitAndPower = right.Single();
// if (Math.Abs(unitAndPower.Power) != 1)
// {
// throw new ArgumentException();
// }
// return unitAndPower.Power;
//}
//else
//{
// DerivedUnit derivedUnit = (DerivedUnit)left.Unit;
// var unitAndPowers = derivedUnit.Parts.OrderBy(x => x.UnitName).ToArray();
// var andPowers = right.OrderBy(x => x.UnitName).ToArray();
// if (unitAndPowers.Select(x => x.Power).SequenceEqual(andPowers.Select(x => x.Power)))
// {
// return 1;
// }
// if (unitAndPowers.Select(x => x.Power).SequenceEqual(andPowers.Select(x => -1 * x.Power)))
// {
// return -1;
// }
// throw new ArgumentException("message");
//}
}
