flip a/b in the project code

[Pomax]

It'll be a major version update, but I really want X to run left/right and Y front-back, not the other way around.

class CabinetProjector {
  ...

  rotate(x, y, z) {
    let { A, B, C } = this;

    let a = x;
    let b = y * cos(A) - z * sin(A);
    let c = y * sin(A) + z * cos(A);

    x = a;
    y = b;
    z = c;

    a = x * cos(B) + z * sin(B);
    b = y;
    c = x * -sin(B) + z * cos(B);

    x = a;
    y = b;
    z = c;

    a = x * cos(C) - y * sin(C);
    b = x * sin(C) + y * cos(C);
    c = z;

    return [b, a, c];
  }

  ...
}