// Considering that the base chord is a coordinates (0,0), this method adds to the base note one fifth per +1 along X,
// and flips the chord color for each value along Y, like so:
// -1,1 0,1 1,1 Cm Gm Dm
// -1,0 0,0 1,0 FM CM GM
// -1,-1 0,-1 1,-1 Dm Am Em
public Chord GetChordAtXY(int x, int y)
{
Note n = baseNote;
ChordColor c = color;
byte tmp = baseNote.Octave;
//Moving along the X axis: one fifth per column (one fifth = 7 semitones).
n = n.Pitch(7 * x);
//Moving along the Y axis: switch for the opposite color every row.
//Considering any given row: the tone two rows above should be one second (2 semitones) below.
//Considering any row of the original color: the tone one row below should be one minor third (3 semitones) below.
if (y > 0)
{
int rowPairs = y / 2;
n = n.PitchDown(rowPairs * 2);
if (y % 2 == 1)
{
n = n.PitchUp(7);
c = c.Opposite();
}
}
else if (y < 0)
{
int rowPairs = (-y) / 2;
n = n.PitchUp(rowPairs * 2);
if (-y % 2 == 1)
{
n = n.PitchDown(3);
c = c.Opposite();
}
}
n.Octave = tmp;
return(new Chord(n, c));
}
private void init()
{
// The ScaleColor enum stores nearly every scale's "blueprint" as a collection of Int32 labels.
// A scale blueprint must be read as a bitwise mask, from LSB to MSB, to know which notes to include in the scale.
int res = color.GetResolution();
_collection = new List <Note>();
for (int i = 0; i < res; i++)
{
// If i-th order bit is set in the ChordColor, add the according note to the collection
if ((((int)color >> i) % 2) == 1)
{
_collection.Add(baseNote.PitchUp((byte)i));
}
}
}
