摄像机平滑跟随

 public Transform target = null;

public float height = 1f;
public float positionDamping = 3f;
public float velocityDamping = 3f;
public float distance = 4f;
public LayerMask ignoreLayers = -1;

private RaycastHit hit = new RaycastHit();

private Vector3 prevVelocity = Vector3.zero;
private LayerMask raycastLayers = -1;

private Vector3 currentVelocity = Vector3.zero;

void Start()
{
raycastLayers = ~ignoreLayers;
}

void FixedUpdate()
{
currentVelocity = Vector3.Lerp(prevVelocity, target.root.rigidbody.velocity, velocityDamping * Time.deltaTime);
currentVelocity.y = 0;
prevVelocity = currentVelocity;
}

void LateUpdate()
{
float speedFactor = Mathf.Clamp01(target.root.rigidbody.velocity.magnitude / 70.0f);
camera.fieldOfView = Mathf.Lerp(55, 72, speedFactor);
float currentDistance = Mathf.Lerp(7.5f, 6.5f, speedFactor);

currentVelocity = currentVelocity.normalized;

Vector3 newTargetPosition = target.position + Vector3.up * height;
Vector3 newPosition = newTargetPosition - (currentVelocity * currentDistance);
newPosition.y = newTargetPosition.y;

Vector3 targetDirection = newPosition - newTargetPosition;
if(Physics.Raycast(newTargetPosition, targetDirection, out hit, currentDistance, raycastLayers))
newPosition = hit.point;

transform.position = newPosition;
transform.LookAt(newTargetPosition);

}