3 dimensional Rotation around point

fn rotate_around_point(point: (f64, f64, f64), axis: (f64, f64, f64), angle: f64) -> (f64, f64, f64) {
    let (px, py, pz) = point;
    let (ax, ay, az) = axis;
    let cosa = angle.cos();
    let sina = angle.sin();

    let x = (ax * (ax * px + ay * py + az * pz) * (1.0 - cosa)
        + px * cosa
        + (-az * py + ay * pz) * sina);

    let y = (ay * (ax * px + ay * py + az * pz) * (1.0 - cosa)
        + py * cosa
        + (az * px - ax * pz) * sina);

    let z = (az * (ax * px + ay * py + az * pz) * (1.0 - cosa)
        + pz * cosa