点击记录坐标点

public class FreeMove : MonoBehaviour 
{
    private static List<Vector3> listPos = new List<Vector3>();
    private bool isMove = false;
    private static int n = 0;
    private float lookatTime = 4;
    private float movetoTime = 10;

    void Update()
    {
        //mouse click
        if (Input.GetMouseButtonDown(0))
        {
            Ray ray = Camera.mainCamera.ScreenPointToRay(Input.mousePosition);
            RaycastHit hits;
            if(Physics.Raycast(ray, out hits))
            {
                if(hits.collider.gameObject.tag == "terr")
                {
                    Vector3 vec = new Vector3(hits.point.x, hits.point.y + 0.5f, hits.point.z);
                    listPos.Add(vec);
                    GameObject obj = GameObject.CreatePrimitive(PrimitiveType.Cube);
                    obj.transform.position = vec;
                    obj.collider.isTrigger = true;
                    obj.AddComponent<TriggerTest>();
                }
            }
        }
    }

    void LateUpdate()
    {
        //camera move
        if (isMove)
        {
            if (listPos != null)
            {
                //look at pos
                this.gameObject.transform.LookAt(new Vector3(Mathf.Lerp(this.gameObject.transform.position.x, listPos[n].x, Time.deltaTime * lookatTime), Mathf.Lerp(this.gameObject.transform.position.y, listPos[n].y, Time.deltaTime * lookatTime), Mathf.Lerp(this.gameObject.transform.position.z, listPos[n].z, Time.deltaTime * lookatTime)));
                //move to pos
                Vector3 targetPos = listPos[n];
                this.gameObject.transform.position = new Vector3(Mathf.Lerp(this.gameObject.transform.position.x, targetPos.x, Time.deltaTime * movetoTime), Mathf.Lerp(this.gameObject.transform.position.y, targetPos.y, Time.deltaTime * movetoTime), Mathf.Lerp(this.gameObject.transform.position.z, targetPos.z, Time.deltaTime * movetoTime));
            }
        }
    }

    void OnGUI()
    {
        if (GUI.Button(new Rect(10, 10, 80, 30), "WALK"))
        {
            isMove = true;
        }
    }

    public static void AddNum()
    {
        if (n < listPos.Count)
        {
            n++;
        }
    }
}

public class TriggerTest : MonoBehaviour 
{
    void OnTriggerEnter(Collider other)
    {
        FreeMove.AddNum();
    }
}