code:

    public ControlsOutput processInput(DataPacket input) {

        Vector2 ballPosition = input.ball.position.flatten();
        CarData myCar = input.car;
        Vector2 carPosition = myCar.position.flatten();
        Vector2 carDirection = myCar.orientation.noseVector.flatten();
        Vector2 carToBall = ballPosition.minus(carPosition);

        double steerCorrectionRadians = carDirection.correctionAngle(carToBall);
        float steer;
        if (steerCorrectionRadians > 0) {
            steer = -1;
        } else {
            steer = 1;
        }

        return new ControlsOutput()
                .withSteer(steer)
                .withThrottle(1);
    }