Cancelling Force of Rigidbody for new Direction

Questions & Answers
1

Hi
I was hoping someone could tell me how I would go about causing an object to fly in a new direction immediately. Currently, I’m adding force to the Rigidbody, but this means that even after turning the object, the previously accumulated force remains. I know I should cancel this force, but I’m not sure what the best way of doing so would be.

Also, I HAVE managed to eliminate the force of my rotation, so that the object only rotates so long as a player is holding down the appropriate button. However, I’m not sure that the way I did it - manually providing a Vector3 (0, 0, 0), is the best way to do so. Can someone tell me whether there’s a better way?

Thanks!

	public float speed = 10f;
	public float turnSpeed = 0.01f;


	private Rigidbody rBody;
	private float accel;
	private float acceleration = 10f;
	private float steer;

	// Use this for initialization
	void Start ()
	{
		rBody = GetComponent<Rigidbody> ();
	}

	// Update is called once per frame
	void Update ()
	{
		accel = Input.GetAxis ("Accel");
		steer = Input.GetAxis ("Steer");

	}

	void FixedUpdate ()
	{
		
		rBody.AddRelativeForce (0f, 0f, accel * acceleration);
		if (rBody.velocity.magnitude > speed)
			rBody.velocity = rBody.velocity.normalized * speed;
		if (steer == 0)
			rBody.angularVelocity = new Vector3 (0, 0, 0);
		else
			rBody.AddRelativeTorque (0f, steer * turnSpeed, 0f);
	}
2

rBody.velocity = newVelocity
should do it. There is no “accumulated force” unless you apply some yourself in that frame.

3

If you really want to use AddForce (and not the velocity change mode) you could just set the velocity and/or the angularVelocity to Vector3.zero and afterwards use AddForce(someForce) to apply the force through this method.