//-----------------------------------------------------------------
//1，把本类作为一个组件，包含在 GameObject 中。
//2，左手坐标系。
//-----------------------------------------------------------------
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
//-----------------------------------------------------------------
public class FiCameraControl : MonoBehaviour
{
    public float moveSpeed = 30.0f;
    public float rotateSpeed = 0.2f;
    public float m_DampTime = 2f;

    public static Vector3 kUpDirection = new Vector3(0.0f, 1.0f, 0.0f);


    //控制摄像机旋转的成员变量。
    private float m_fLastMousePosX = 0.0f;
    private float m_fLastMousePosY = 0.0f;
    private bool m_bMouseRightKeyDown = false;

    private Camera m_Camera;
    private float m_ZoomSpeed;
    private Vector3 m_MoveVelocity = Vector3.zero;
    private Vector3 m_originPos;
    private Vector3 m_targetPos;
    private float m_size;

    //-----------------------------------------------------------------
    void Start()
    {
        m_Camera = GetComponent<Camera>();
        m_targetPos = transform.position;
        m_originPos = transform.position;
        m_size = m_Camera.fieldOfView;

    }

    public void Move(Vector3 targetPos)
    {
        m_originPos = transform.position;
        m_targetPos = targetPos;
    }

    private void Move()
    {
        transform.position = Vector3.SmoothDamp(transform.position, m_targetPos, ref m_MoveVelocity, m_DampTime);
    }

    public void Zoom(float size)
    {
        m_size = size;
    }

    public void Zoom()
    {
        m_Camera.fieldOfView = Mathf.SmoothDamp(m_Camera.fieldOfView, m_size, ref m_ZoomSpeed, m_DampTime);
    }

    private void FixedUpdate()
    {
        Move();
        Zoom();
    }

    //-----------------------------------------------------------------
    void Update()
    {
        //判断旋转
        //if (Input.GetMouseButtonDown(1)) //鼠标右键刚刚按下了
        //{
        //    var missle = GameObject.Find("CJ_Missile_Tests_daodangM_001");
        //    if (m_bMouseRightKeyDown == false)
        //    {
        //        m_bMouseRightKeyDown = true;
        //        Vector3 kMousePos = Input.mousePosition;
        //        m_fLastMousePosX = kMousePos.x;
        //        m_fLastMousePosY = kMousePos.y;
        //    }
        //}

        //else if (Input.GetMouseButtonUp(1)) //鼠标右键刚刚抬起了
        //{
        //    if (m_bMouseRightKeyDown == true)
        //    {
        //        m_bMouseRightKeyDown = false;
        //        m_fLastMousePosX = 0;
        //        m_fLastMousePosY = 0;
        //    }
        //}
        //else if (Input.GetMouseButton(1)) //鼠标右键处于按下状态中
        //{
        //    if (m_bMouseRightKeyDown)
        //    {
        //        Vector3 kMousePos = Input.mousePosition;
        //        float fDeltaX = kMousePos.x - m_fLastMousePosX;
        //        float fDeltaY = kMousePos.y - m_fLastMousePosY;
        //        m_fLastMousePosX = kMousePos.x;
        //        m_fLastMousePosY = kMousePos.y;


        //        Vector3 kNewEuler = transform.eulerAngles;
        //        kNewEuler.x += (fDeltaY * rotateSpeed);
        //        kNewEuler.y += -(fDeltaX * rotateSpeed);
        //        transform.eulerAngles = kNewEuler;
        //    }
        //}


        ////判断位移
        //float fMoveDeltaX = 0.0f;
        //float fMoveDeltaZ = 0.0f;
        //float fDeltaTime = Time.deltaTime;
        //if (Input.GetKey(KeyCode.A))
        //{
        //    fMoveDeltaX -= moveSpeed * fDeltaTime;
        //}
        //if (Input.GetKey(KeyCode.D))
        //{
        //    fMoveDeltaX += moveSpeed * fDeltaTime;
        //}
        //if (Input.GetKey(KeyCode.W))
        //{
        //    fMoveDeltaZ += moveSpeed * fDeltaTime;
        //}
        //if (Input.GetKey(KeyCode.S))
        //{
        //    fMoveDeltaZ -= moveSpeed * fDeltaTime;
        //}
        //if (fMoveDeltaX != 0.0f || fMoveDeltaZ != 0.0f)
        //{
        //    Vector3 kForward = transform.forward;
        //    Vector3 kRight = Vector3.Cross(kUpDirection, kForward);
        //    Vector3 kNewPos = transform.position;
        //    kNewPos += kRight * fMoveDeltaX;
        //    kNewPos += kForward * fMoveDeltaZ;
        //    transform.position = kNewPos;
        //}
    }
}
//-----------------------------------------------------------------