Function pianoMap

pianoMap(
    ys: number[],
    shifts?: number[],
): {
    coordsByIndex: (Coords3D | undefined)[];
    indexByCode: Map<string, number>;
}
Convert a linear sequence of note types into a piano-style layout.
Parameters
- ys: number[]
  Desired vertical coordinates for the notes/keys
- Optionalshifts: number[]
  Adjustments to the first three rows. A shift difference of 1 puts a row behind the next row. Defaults to [0, 0, 0] so all rows are ahead of the rows below.
Returns { coordsByIndex: (Coords3D | undefined)[]; indexByCode: Map<string, number> }
indexByCode: a Map instance from keycodes to note indices. coordsByIndex: location of each note on layer 1 (the one with QWERTY/ASDF keys).
- Defined in piano.ts:9