private double fragmentMass(pwiz.CLI.proteome.Fragmentation f, IonSeries series, int length, int charge)
{
switch (series)
{
case IonSeries.a: return f.a(length, charge);
case IonSeries.b: return f.b(length, charge);
case IonSeries.c: return f.c(length, charge);
case IonSeries.cMinus1: return f.c(length, charge) - Proton.Mass / charge;
case IonSeries.x: return f.x(length, charge);
case IonSeries.y: return f.y(length, charge);
case IonSeries.z: return f.z(length, charge);
case IonSeries.zPlus1: return f.zRadical(length, charge);
case IonSeries.zPlus2: return f.zRadical(length, charge) + Proton.Mass / charge;
default: throw new ArgumentException();
}
}
