public Pitch TranslatePitch(Pitch pitch, DiatonicInterval interval)
{
var stepNumber = StepToStepNumber(pitch.ToStep());
var halfTones = 0;
if (interval.Steps == 0)
{
throw new ArithmeticException("There is no interval with 0 steps.");
}
if (interval.Steps > 0)
{
for (var i = 0; i < interval.Steps - 1; i++)
{
halfTones += Mode.GetIntervalAfterStep(stepNumber + i);
}
}
else if (interval.Steps < 0)
{
for (var i = 0; i > interval.Steps + 1; i--)
{
halfTones -= Mode.GetIntervalBeforeStep(stepNumber + i);
}
}
return(Pitch.FromMidiPitch(pitch.MidiPitch + halfTones, MidiPitchTranslationMode));
}
public bool IsIntervalDiatonic(Pitch pitch, Interval interval)
{
if (!FullScale.Contains(pitch.ToStep()))
{
throw new ArgumentException(string.Format("Starting pitch {0} does not belong to scale.", pitch), "pitch");
}
var newStep = pitch.Translate(interval, MidiPitchTranslationMode).ToStep();
return(FullScale.Contains(newStep));
}
/// <summary>
/// Returns an interval between two pitches.
/// </summary>
/// <param name="p1">First pitch</param>
/// <param name="p2">Second pitch</param>
/// <returns>Interval between two pitches.</returns>
public static Interval Between(Pitch p1, Pitch p2)
{
return(new Interval(p2.ToStep().ToStepNumber() - p1.ToStep().ToStepNumber() + 1, (p2.MidiPitch - p1.MidiPitch) % 12));
}