12.20 摄像机跟随玩家

public class CameraFollow : MonoBehaviour {
	Transform player;
float up = 11, away = 17;
	Vector3 pos;
float speed =3f;
	void Start () {
	player = GameObject.FindWithTag("Player").transform;
}
void Update () {

	pos = player.position + Vector3.up * up - player.forward * away;//相机定位
	transform.position = Vector3.Lerp(transform.position,pos,Time.deltaTime*speed);//跟随
	transform.LookAt(player);//看向玩家

	//四元数写法

	//Quaternion q = Quaternion.LookRotation(player.position-transform.position);
	//transform.rotation = Quaternion.Slerp(transform.rotation,q,Time.deltaTime*speed);
}