Camera bám theo

using UnityEngine;

public class FollowCamera : MonoBehaviour
{
    [SerializeField] private Transform target;
    [SerializeField] private Vector3 offset = new Vector3(0f, 6f, -8f);
    [SerializeField] private float smoothTime = 0.15f;
    [SerializeField] private Vector3 lookAtOffset = new Vector3(0f, 1.5f, 0f);

    private Vector3 velocity;      // SmoothDamp giữ trạng thái ở đây

    void LateUpdate()
    {
        if (target == null) return;

        Vector3 wanted = target.position + offset;
        transform.position = Vector3.SmoothDamp(transform.position, wanted, ref velocity, smoothTime);
        transform.LookAt(target.position + lookAtOffset);
    }
}

[SerializeField] private CharacterSwitcher switcher;

void LateUpdate()
{
    Transform target = switcher.ActiveCharacter;    // không gán cứng
    Vector3 wanted = target.position + offset;

    transform.position = Vector3.SmoothDamp(transform.position, wanted, ref velocity, smoothTime);
    transform.LookAt(target.position + lookAtOffset);
}

[SerializeField] private float lookAhead = 2.5f;
private CharacterController targetCC;

void LateUpdate()
{
    Vector3 ahead = targetCC.velocity.normalized * lookAhead;
    ahead.y = 0f;

    Vector3 wanted = target.position + offset + ahead;
    transform.position = Vector3.SmoothDamp(transform.position, wanted, ref velocity, smoothTime);
    transform.LookAt(target.position + lookAtOffset);
}

[SerializeField] private LayerMask obstacles;

Vector3 pivot = target.position + lookAtOffset;
Vector3 dir = (wanted - pivot).normalized;
float dist = Vector3.Distance(pivot, wanted);

// có bức tường nào giữa nhân vật và chỗ camera muốn đứng không?
if (Physics.SphereCast(pivot, 0.3f, dir, out RaycastHit hit, dist, obstacles))
    wanted = hit.point - dir * 0.25f;      // kéo camera ra trước tường