Axis

The Axis class is used to invert Pitch vectors about a fixed point via Pitch.invert.

Class Constructor

constructor(p: Pitch, q: Pitch);

An Axis is constructed from two Pitch vectors, which would be sent to each other via inversion about the resultant axis.

let axis = new Axis(
    SPN.toPitch("C4");
    SPN.toPitch("G4");
);

let p = SPN.toPitch("E4");
p.invert(axis); // "Eb4"