Integrate RigidBody kinematic After Press GetAxis Unity - unity3d

Question

I would like to integrate the rigidbody kinematic, when I finish pressing one of the axis, because in my code after my tank moves, it keeps moving for a while as if it were a force. I tried to add it, if it stopped pressing the buttons but it didn't work.
I tried to add them in the update, or in the form of a boolean but I think I have problems to set the logic of where it should be so that it works correctly.
What I would like is for the object's kinematic to activate when the axis is released.
Thank you very much for the help
public class TankController : MonoBehaviour
{
public int m_PlayerNumber = 1;
public float m_Speed = 12f;
public float m_TurnSpeed = 180f;
public AudioSource m_MovementAudio;
public float m_PitchRange = 0.2f;
private string m_MovementAxisName;
private string m_TurnAxisName;
private Rigidbody m_Rigidbody;
private float m_MovementInputValue;
private float m_TurnInputValue;
private float m_OriginalPitch;
private void Awake()
{
m_Rigidbody = GetComponent<Rigidbody>();
}
private void OnEnable()
{
// When the tank is turned on, make sure it's not kinematic.
m_Rigidbody.isKinematic = false;
// Also reset the input values.
m_MovementInputValue = 0f;
m_TurnInputValue = 0f;
}
private void OnDisable()
{
// When the tank is turned off, set it to kinematic so it stops moving.
m_Rigidbody.isKinematic = true;
}
private void Start()
{
// The axes names are based on player number.
m_MovementAxisName = "CarroV" ;
m_TurnAxisName = "CarroH";
// Store the original pitch of the audio source.
}
private void Update()
{
// Store the value of both input axes.
m_MovementInputValue = Input.GetAxis(m_MovementAxisName);
m_TurnInputValue = Input.GetAxis(m_TurnAxisName);
EngineAudio();
}
private void FixedUpdate()
{
// Adjust the rigidbodies position and orientation in FixedUpdate.
/* if (Input.GetKey(KeyCode.Keypad8) || !Input.GetKey(KeyCode.Keypad2) || !Input.GetKey(KeyCode.Keypad4) || !Input.GetKey(KeyCode.Keypad6))
{
m_Rigidbody.isKinematic = true;
}
*/
Move();
Turn();
}
private void Move()
{
//m_Rigidbody.isKinematic = false;
// Create a vector in the direction the tank is facing with a magnitude based on the input, speed and the time between frames.
Vector3 movement = transform.forward * m_MovementInputValue * m_Speed * Time.deltaTime;
// Apply this movement to the rigidbody's position.
m_Rigidbody.MovePosition(m_Rigidbody.position + movement);
}
private void Turn()
{
// m_Rigidbody.isKinematic = false;
// Determine the number of degrees to be turned based on the input, speed and time between frames.
float turn = m_TurnInputValue * m_TurnSpeed * Time.deltaTime;
// Make this into a rotation in the y axis.
Quaternion turnRotation = Quaternion.Euler(0f, turn, 0f);
// Apply this rotation to the rigidbody's rotation.
m_Rigidbody.MoveRotation(m_Rigidbody.rotation * turnRotation);
/* else
{
m_Rigidbody.isKinematic = true;
}*/
}
}
`

Answer 1

When you set isKinematic, you're telling the physics engine to not apply forces to the game object.
However, your object still has velocity and you need to cancel that yourself.
if (Input.GetKey(KeyCode.Keypad8) || !Input.GetKey(KeyCode.Keypad2) || !Input.GetKey(KeyCode.Keypad4) || !Input.GetKey(KeyCode.Keypad6))
{
m_Rigidbody.isKinematic = true;
m_Rigidbody.velocity = Vector3.zero;
}
Additional consideration:
Is there a reason you're using the physics engine? If you want it to use physics then stopping should be either using "drag" in the RigidBody inspector or place a force in the opposite direction:
if (Input.GetKey(KeyCode.Keypad8) || !Input.GetKey(KeyCode.Keypad2) || !Input.GetKey(KeyCode.Keypad4) || !Input.GetKey(KeyCode.Keypad6))
{
m_Rigidbody.AddForce(-m_Rigidbody.velocity * someScalingValue); // where someScalingValue is a float you choose
}
If you're doing physics, you should try and keep isKinematic to false.
Alternatively don't use the physics engine, keep isKinematic set to true and move the transform instead.