参考文章

Unity3D之人物头顶名称与血条更新与绘制
https://wenku.baidu.com/view/1ac8f9bfda38376bae1fae1e.html

Unity利用MovieTexture实现视频的播放
https://blog.csdn.net/weixin_43492764/article/details/85246524

切换武器

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class ChanceWeapon : MonoBehaviour {
	public GameObject weapon_01;
	public GameObject weapon_02;
	void Start ()
	{
		weapon_01.SetActive(false);
		weapon_02.SetActive(true);
	}
	void Update () {
		if (Input.GetKeyDown ("0")){
			switchWeaponsPlease();
			}	
		}	
	void switchWeaponsPlease(){
		if(weapon_01.activeSelf){
			weapon_01.SetActive(false);
			weapon_02.SetActive(true);
		}
		else
		{
			weapon_01.SetActive(true);
			weapon_02.SetActive(false);
		}
	}
}