// Input.GetAxis("Horizontal")返回括号内轴向的值
myDirection = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
// transform.TransformDirection()从自身坐标转化为世界坐标
myDirection = transform.TransformDirection(myDirection);

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Video;
using UnityEngine.UI;

public class VideoDisplay : MonoBehaviour
{
    private RawImage raw; // RawImage组件
    private VideoPlayer video; // VideoPlayer组件


    // Start is called before the first frame update
    void Start()
    {
        raw = GetComponent<RawImage>();
        video = GetComponent<VideoPlayer>();
    }

    // Update is called once per frame
    void Update()
    {
        raw.texture = video.texture; // 让video的材质给image的材质，就能显示图像了
    }
}

if (Input.GetKey(KeyCode.F)) // 按F键视频全屏
{
  video.renderMode = VideoRenderMode.CameraNearPlane; // 渲染模式为摄像机近平面
}
if (Input.GetKey(KeyCode.Escape)) // ESC 退出全屏模式
{
  video.renderMode = VideoRenderMode.RenderTexture; // 渲染器纹理
}
// 视频静音
video.SetDirectAudioMute(0, true);

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


[System.Serializable] // 序列化


public class dataModel
{
    public int[] number; // 题号字段
    public string[] title; // 题目
    public string[] A; // A选项
    public string[] B;
    public string[] C;
    public string[] D;
    public string[] answer; //答案
}

{
    "number": [1, 2, 3, 4, 5],
    "title": ["2+5=？", "中国的首都在哪里？", "How old are you?", "国庆节是哪一天？", "2*3=？"],
    "A": ["7", "上海", "18", "10月1日", "9"],
    "B": ["2", "广州", "20", "7月1日", "6"],
    "C": ["10", "北京", "21", "6月1日", "5"],
    "D": ["3", "杭州", "22", "1月1日", "1"],
    "answer": ["A", "C", "D", "A", "B"]
}

dataModel obj; // 数据模型对象

// Start is called before the first frame update
void Start()
{
  // JsonUtility.FromJson<数据模型>(json字符串)
  // 将从JSON中读取的字符串转换为对应模型对象
  obj = JsonUtility.FromJson<dataModel>(LoadFromJson());

}
private string LoadFromJson() // 从JSON文件中读取数据
{
  StreamReader reader;
  string json; //读取到的字符串
  if (!File.Exists(Application.dataPath +"/data/question.json"))
  {
    print(Application.dataPath + "/data/question.json" + " 文件不存在");
    // 没有找到文件
    return null;
  }

  reader = new StreamReader(Application.dataPath + "/data/question.json"); // 分配读取文件的路径
  json = reader.ReadToEnd(); // 重头读到尾，返回字符串类型

  return json;
}