/// <summary>
/// stringIndex start from 1 and from down to up on guitar
/// </summary>
public string GetTuneAt(int stringIndex, int fretIndex)
{
if (stringIndex < 1 || stringIndex > STRING_LEN)
{
throw new ArgumentException("stringIndex. no string at specified index");
}
if (fretIndex < 0 || fretIndex >= FRET_LEN)
{
throw new ArgumentException("fretIndex. too small or too large");
}
return(MusicalAlphabet.At(
StringAt(stringIndex).BaseToneIndex,
fretIndex));
}
public Tuning(IEnumerable <int> toneIndexSource, string name)
{
if (toneIndexSource == null)
{
throw new ArgumentNullException("toneIndexSource");
}
var toneIndex = this.toneIndex;
using (var iterator = toneIndexSource.GetEnumerator())
{
for (int i = 0; i < Guitar.STRING_LEN; i++)
{
if (!iterator.MoveNext())
{
throw new ArgumentException("toneIndexSource. Incompleted");
}
int index = iterator.Current;
if (index < 0 || index >= MusicalAlphabet.LEN)
{
throw new ArgumentException(
string.Format("toneIndexSource. invalid tone index at {0}", i));
}
toneIndex[i] = index;
}
if (iterator.MoveNext())
{
throw new ArgumentException("toneIndexSource. Too long");
}
}
this.BaseToneIndexes = toneIndex;
this.BaseTones = toneIndex
.Select(item => MusicalAlphabet.At(0, item))
.ToArray();
this.hashcode = checked (toneIndex
.Select((_, i) => toneIndex.Take(i + 1).Sum() + i)
.Sum());
this.name = string.IsNullOrEmpty(name) ?
string.Join(null, this.BaseTones) :
name;
}