using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/*******************************************************************************
*Create By CG
*Function 摄像机控制
*******************************************************************************/
namespace ZXK.UTility
{
	public class CameraMyControl : MonoBehaviour
	{
        [SerializeField]//镜头位移速度
        private float _moveSpeed = 10.0f;
        [SerializeField]//镜头旋转速度
        private float _rotSpeed = 100.0f;
        [SerializeField]//镜头拉近速度
        private float _zoomSpeed = 100.0f;
        //加速度倍数
        private float _expedite = 5.0f;

        private Camera _camera = null;

        private float _cameraView = 60.0f;

        private void Awake()
        {
            _camera = transform.GetComponentInChildren<Camera>();
            if (_camera)
            {
                _cameraView = _camera.fieldOfView;
                _camera.transform.localPosition = Vector3.zero;
            }
        }

        private void Update()
        {
            if (UnityEngine.EventSystems.EventSystem.current.IsPointerOverGameObject()) return;
            //获取移动按键
            Vector3 translation = GetInputTranslationDirection();
            //加速
            if (Input.GetKey(KeyCode.LeftShift))
            {
                //原速度*10为按下Shift后的速度
                translation *= _expedite;
            }
            //移动
            transform.Translate(translation * Time.deltaTime * _moveSpeed);

            //旋转
            if (Input.GetMouseButton(1))
            {
                Vector2 mouseMovement = new Vector2(Input.GetAxis("Mouse X"), Input.GetAxis("Mouse Y")*-1);
                transform.Rotate(new Vector3(0, mouseMovement.x, 0) * Time.deltaTime * _rotSpeed,Space.World);
                _camera.transform.Rotate(new Vector3(mouseMovement.y, 0, 0) * Time.deltaTime * _rotSpeed);
            }

            //摄像机拉近
            _camera.transform.Translate(new Vector3(0, 0, Input.mouseScrollDelta.y * Time.deltaTime * _zoomSpeed));
        }

        Vector3 GetInputTranslationDirection()
        {
            Vector3 direction = new Vector3();
            if (Input.GetKey(KeyCode.W))
            {
                direction += Vector3.forward;
            }
            if (Input.GetKey(KeyCode.S))
            {
                direction += Vector3.back;
            }
            if (Input.GetKey(KeyCode.A))
            {
                direction += Vector3.left;
            }
            if (Input.GetKey(KeyCode.D))
            {
                direction += Vector3.right;
            }
            if (Input.GetKey(KeyCode.Q))
            {
                direction += Vector3.up;
            }
            if (Input.GetKey(KeyCode.E))
            {
                direction += Vector3.down;
            }
            return direction;
        }
    }
}