using UnityEngine;

public class FollowPosition : MonoBehaviour

{

    public Transform targetTrans;

    public Transform lookAtTrans;

    public Vector3 offsetPos;       //与本跟随者之间的位置偏移

    public bool x, y, z;            //是否在对应的轴上进行跟随

    Transform selfTrans;

    Vector3 targetPos;

    Vector3 curPos;

    void Start()

    {

        selfTrans = transform;

    }

    void LateUpdate()

    {

        if(targetTrans != null)

        {

            targetPos = targetTrans.position;

            curPos = selfTrans.position;

            if (x)

                curPos.x = targetPos.x + offsetPos.x;

            if (y)

                curPos.y = targetPos.y + offsetPos.y;

            if (z)

                curPos.z = targetPos.z + offsetPos.z;

            selfTrans.position = curPos;

        }

        if(lookAtTrans != null)

        {

            selfTrans.LookAt(lookAtTrans.position);

        }

    }

}