addforce results in different speeds in build and inspector

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1

i have tried adding Time.deltaTime but that only results in making the object go even slower, when i test the game on the inspector the momentum works just fine, but once i create a build and try the same thing my object goes a lot slower

 if (Input.GetKey("w"))
        {
            rb.AddForce(transform.forward * moveforward);

        }

 if (Input.GetKey("s"))
        {
            rb.AddForce(transform.forward * -moveback);
        }

1 Answer

1
2

Call AddForce() inside the FixedUpdate()

bool moveForwardRequest;

void Update()
{
 if (Input.GetKey("w"))
  {
        moveForwardRequest = true;
  }
}

void FixedUpdate()
{
    if(moveForwardRequest)
    {
          moveForwardRequest = false;
          rb.AddForce(transform.forward * moveforward);
    }
}

AddForce have the optional third parameter, it is ForceMode.Force by default, AddForce with ForceMode.Force mode works like this internally,

 rigidbody.velocity += Vector3.forward*moveForward* Time.fixedDeltaTime / (rigidbody.mass);

so, it is better to call AddForce method inside FixedUpdate, to avoid unexpected behaviour.