using UnityEngine;
using System.Collections;
/// <summary>
/// 
/// </summary>
public class Test2DMove : MonoBehaviour
{
    /// <summary>
    /// 
    /// </summary>
    private Vector3 mStart = Vector3.zero;

    /// <summary>
    /// 
    /// </summary>
    private Vector3 mEnd = Vector3.zero;

    /// <summary>
    /// 
    /// </summary>
    Vector3 center = Vector3.zero;

    /// <summary>
    /// 
    /// </summary>
    Vector3 riseRelCenter;

    /// <summary>
    /// 
    /// </summary>
    Vector3 setRelCenter;

    /// <summary>
    /// 
    /// </summary>
    public float mSpeed = 0.01f;

    /// <summary>
    /// 
    /// </summary>
    public bool IsOver = false;

    /// <summary>
    /// 
    /// </summary>
    float mFloat = 0;

    public Transform startOjb = null;
    public Transform endOjb = null;
    void Start()
    {
        Init(startOjb.transform.position, endOjb.transform.position);
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="start"></param>
    /// <param name="end"></param>
    public void Init(Vector3 start, Vector3 end)
    {
        this.mStart = start;
        this.mEnd = end;
        // 弧线的中心
        center = (mStart + mEnd) * 0.5f;
        // 向下移动中心，垂直于弧线
        center += new Vector3(3.5f, 0, 0);
        riseRelCenter = start - center;
        setRelCenter = end - center;

        IsOver = true;
    }


    void Update()
    {
        if (IsOver)
        {
            //transform.LookAt(mEnd);
            mFloat += Time.deltaTime * mSpeed;
            // 相对于中心在弧线上插值
            transform.position = Vector3.Slerp(riseRelCenter, setRelCenter, mFloat);
            transform.position += center;

            if (transform.position == mEnd)
            {
                IsOver = false;
                //Destroy(gameObject);
            }
        }
    }
    
}