private Chord GetChord(Chord previous)
{
Chord chord = new Chord();
if (previous == null)
{
chord.Degree = Degree.d1_Tonic;
}
else
{
chord.Degree = DegreeTraverser.Next(previous.Degree);
}
chord.Polygon = PolygonSelector.Select();
chord.Notes = new List <Note>();
for (int i = 0; i < (int)chord.Polygon; i++)
{
var degreeIndex = (int)chord.Degree - 1;
var interval = Scale.Intervals[(degreeIndex + (i * 2)) % 7];
chord.Notes.Add(AddIntervalToPitch(Root, interval));
}
var chordType = ChordType.Major;
chord.Root = chord.Notes[0];
var firstNote = (int)chord.Notes[0];
var secondNote = (int)chord.Notes[1];
var thirdNote = (int)chord.Notes[2];
if (firstNote > secondNote)
{
secondNote = secondNote + 12;
}
if (firstNote > thirdNote)
{
thirdNote = thirdNote + 12;
}
var thirdDistance = secondNote - firstNote;
switch (thirdDistance)
{
case 2:
chordType = ChordType.Sus2;
break;
case 3:
chordType = ChordType.Minor;
break;
case 4:
chordType = ChordType.Major;
break;
case 5:
chordType = ChordType.Sus4;
break;
}
var fifthDistance = thirdNote - firstNote;
switch (fifthDistance)
{
case 6:
chordType = ChordType.Diminished;
break;
case 8:
chordType = ChordType.Augmented;
break;
}
chord.Type = chordType;
return(chord);
}