CODEWITHSUNDEEP
c#unity-game-enginerotationtransformquaternions
Daniele Pappalardo
Daniele Pappalardo

Reputation: 104

Rotation third person in direction to camera?

I want my object to rotate towards the camera at the same time when I rotate the camera, so that the player while walking is always oriented in the direction of the camera, as in typical third-person games. Unfortunately, any method used so far leads me to a rotation of the object, slightly behind, the rotation of the camera. I've been looking for a solution for a week and I'm desperate. I publish a video of the rotation I have with an object.

video of the late rotation

private Rigidbody rb;
public float speed = 1.0f;

void Start()
    {
      rb = GetComponent<Rigidbody>(); 
    }

direction = Camera.main.transform.forward;
direction.y = 0.00f;

private void FixedUpdate ()
{

 Quaternion targetRotation = Quaternion.LookRotation(direction);
Quaternion newRotation = Quaternion.Lerp(rb.transform.rotation, targetRotation, speed * Time.fixedDeltaTime);
rb.MoveRotation(newRotation);
 }  

}

Upvotes: 0

Views: 1230

Answers (2)

Ruzihm
Ruzihm

Reputation: 20249

This is an inappropriate use for Quaternion.Lerp because you aren't working with a proportion of how far to move. Currently, you're basically telling it to only rotate a tiny percentage of the way to the target rotation.

You should rather use Quaternion.RotateTowards, because you can easily calculate angular rotation based on deltaTime (or, fixedDeltaTime as you use):

public float speed = 30f; // max rotation speed of 30 degrees per second

// ...

Quaternion newRotation = Quaternion.RotateTowards(rb.transform.rotation, targetRotation, 
        speed * Time.deltaTime);
rb.MoveRotation(newRotation);

After re-reading your question, now it seems that you don't want a smooth transition/lerp. In that case, just set the rotation to the target rotation:

rb.MoveRotation(targetRotation);

If even that is too much interpolation/not immediate enough, you could set the rigidbody's rotation in Update:

private void Update ()
{
    rb.rotation = Quaternion.LookRotation(direction);
}

Upvotes: 1

KBaker
KBaker

Reputation: 401

You don't need any of these code I think. You can just place the camera as your character's child transform in the hierarchy, and align it so that it is above and behind your character. When he moves, the camera should follow automatically.

Upvotes: 0

Related Questions