using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Cinemachine;

public class CameraVR : MonoBehaviour
{
    private CinemachineVirtualCamera _cinemachineVirtualCamera;
    private CinemachineBasicMultiChannelPerlin _multiChannelPerlin;

    //当前持续时间
    private float _shakeTime;
    //总时间
    private float _shakeTimeTotal;
    //强度
    private float _shakeIntensity;


    private void Awake()
    {

        _cinemachineVirtualCamera = GetComponent<CinemachineVirtualCamera>();

        _multiChannelPerlin = _cinemachineVirtualCamera.GetCinemachineComponent<CinemachineBasicMultiChannelPerlin>();

    }

    // Update is called once per frame
    void Update()
    {
        if (_shakeTime > 0)
        {
            _shakeTime -= Time.deltaTime;
            _multiChannelPerlin.m_AmplitudeGain = Mathf.Lerp(0, _shakeIntensity, _shakeTime / _shakeTimeTotal);
        }
    }

    /// <summary>
    /// 抖动
    /// </summary>
    /// <param name="Time">抖动时间</param>
    /// <param name="Intensity">强度</param>
    public void ShakeCamera(float time, float intensity)
    {
        if (_cinemachineVirtualCamera != null)
        {
            _shakeTimeTotal = time;
            _shakeIntensity = intensity;

            _shakeTime = _shakeTimeTotal;
            _multiChannelPerlin.m_AmplitudeGain = _shakeIntensity;
        }
    }

  private void OnDrawGizmos()
    {
        Ray ray = new Ray(transform.position, transform.forward);
        Gizmos.color = Color.blue;
 
        Gizmos.DrawRay(ray);
 
    }    
}