https://www.bilibili.com/video/BV18U4y187ug

工程

asset/.meta 属性文件

如何创建代码 & 场景

preference→external tolls 更改编辑器

asset 右键菜单 creat

五个窗口面板作用

center / pivot 原点坐标

创建地面

GameObject → Component Render → Material

书写第一个代码

游戏引擎：高复用模块的整合

文件名与类名保持一致

方法 / 函数

Start 开始方法

Update 更新方法

什么是预制体

prefabs 预先制作好的物体

instance 实例（对象）

碰撞检测

物体名字&标签

触发检测 & 碰撞检测

触发检测

勾选 Box Collider 的 Is TriggerP

//Player.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI; //引入命名空间

public class Player : MonoBehaviour
{
    public Rigidbody rd;
    public int score = 0;
    public Text scoreText;
    public GameObject winText;

    // Start is called before the first frame update
    void Start()
    {
        // Debug.Log("game start");
        rd = GetComponent<Rigidbody>();

    }

    // Update is called once per frame
    void Update()
    {
        // Debug.Log("game playing");
        // Vector3.right left back forward
        // (x,y,z) (2,0,0)
        // rd.AddForce(Vector3.right);
        // rd.AddForce( new Vector3(10,0,0) );
        float h = Input.GetAxis("Horizontal"); //-1 1
        float v = Input.GetAxis("Vertical");
        Debug.Log(h);
        rd.AddForce( new Vector3(h,0,v) );

    }

    //触发检测

    private void OnTriggerEnter(Collider other)
    {
        Debug.Log("OnTriggerEnter"+other.tag);

        if (other.tag == "Food")
        {
            Destroy(other.gameObject);
            score++;
            scoreText.text = "Socre:" + score;

            if(score == 5)
            {
                winText.SetActive(true);
            }

        }
    }

    private void OnTriggerExit(Collider other)
    {
        
    }

    private void OnTriggerStay(Collider other)
    {
        
    }

    /*
    //碰撞检测的方式

    private void OnCollisionEnter(Collision collision)
    {
        //获取碰撞物体上的标签
        //collision.collider.tag

        if (collision.gameObject.tag == "Food")
        {
            Destroy(collision.gameObject);
        }
    }

    private void OnCollisionExit(Collision collision)
    {
        
    }

    private void OnCollisionStay(Collision collision)
    {
        
    }

    */

}

//FollowTarget.cs

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

public class FollowTarget : MonoBehaviour
{
    public Transform playerTransform;
    private Vector3 offset;
    //通过拖拽方式获得小球位置
    // Start is called before the first frame update
    void Start()
    {
        //计算位置差
        offset = transform.position - playerTransform.position;
    }

    // Update is called once per frame
    void Update()
    {
        transform.position = playerTransform.position + offset;
    }
}

//Food.cs

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

public class Food : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        transform.Rotate( Vector3.up );
    }
}