using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using AX.MessageSystem;

public struct CameraFocusData
{
    public float distance;
    public float x;
    public float y;
    public GameObject obj;
}

/// <summary>
/// 车辆头顶图标处理
/// </summary>
public class CarHeadImg : MonoBehaviour {

    public GameObject carObj;

    public float distance = 20f;
    public float x = 180.0f;
    public float y = 20.0f;

    // Use this for initialization
    void Start () {
        GetComponent<Button>().onClick.AddListener(CameraFocusCarObj);
	}

    private void CameraFocusCarObj()
    {
        CameraFocusData data = new CameraFocusData();
        data.distance = distance;
        data.x = x;
        data.y = y;
        data.obj = carObj;

        MessageDispatcher.SendMessage("CAMERA_FOCUS_CAROBJ", data);
    }

    // Update is called once per frame
    void Update () {

        UIFollow();
    }

    /// <summary>
    /// 车辆头顶UI图标跟随车辆模型
    /// </summary>
    private void UIFollow()
    {
        transform.GetComponent<RectTransform>().position = Camera.main.WorldToScreenPoint(carObj.transform.position);
    }

    private void OnDestroy()
    {
        GetComponent<Button>().onClick.RemoveListener(CameraFocusCarObj);
    }
}