Unity教学如何制作的2D赛车小游戏？
摘要：视频链接： https:www.bilibili.comvideoBV1wT9rYZEKe?spm_id_from=333.788.videopod.sections&vd_source=25b783f5f9
视频链接：
https://www.bilibili.com/video/BV1wT9rYZEKe?spm_id_from=333.788.videopod.sections&vd_source=25b783f5f945c4507229e9dec657b5bb
本教程涉及到 Unity 常用组件、常用方法等核心知识点，掌握本教程相关知识后你就就可以快速掌握一些 Unity2D 常用组件了
1.需求分析
玩家通过点击屏幕上的向左、向右移动按钮控制红色小车左右移动避让黄色小车
黄色小车在屏幕最上方随机生成后向下移动
屏幕右上方分数跟随时间变化而变化
红色小车与某一辆黄色小车碰撞则游戏结束，弹出游戏结束界面
游戏结束界面上有本局游戏分数以及重新开始的按钮
2.代码实现
2.1 创建项目目录
Imags：静态图片
Prefabs：预设物体
Resources：动态资源
Audio：音频
Scenes：场景
Scripts：脚本
2.2 创建面板、小车、按钮等
2.3 按钮控制红色小车左右移动
创建游戏管理脚本 GameManager.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class GameManager : MonoBehaviour
{
/// <summary>
/// 游戏管理器实例
/// </summary>
public static GameManager insta;
/// <summary>
/// 主界面
/// </summary>
public MainPanel mainPanel;
private void Awake()
{
insta = this;
}
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
}
}
红色小车挂载脚本 RedCar.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class RedCar : MonoBehaviour
{
/// <summary>
/// 移动速度
/// </summary>
private int moveSpeed = 100;
/// <summary>
/// 移动方向
/// </summary>
public int moveDirection = 0;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
//屏幕范围内左右移动
if (moveDirection == -1 && transform.localPosition.x <= -490) return;
if (moveDirection == 1 && transform.localPosition.x >= 490) return;
transform.localPosition += new Vector3(moveDirection * moveSpeed * Time.deltaTime, 0, 0);
}
/// <summary>
/// 碰撞显示结束界面
/// </summary>
/// <param name="collision"></param>
private void OnTriggerEnter2D(Collider2D collision)
{
GameManager.insta.overPanel.ShowPanel();
}
}
主界面挂载脚本 MainPanel.cs，拖拽相应物体
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class MainPanel : MonoBehaviour
{
/// <summary>
/// 红色小车物体
/// </summary>
public RedCar redCar;
/// <summary>
/// 分数文本
/// </summary>
public Text scoreText;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
}
/// <summary>
/// 点击按钮向左移动
/// </summary>
public void OnLeftMoveClick()
{
redCar.moveDirection = -1;
}
/// <summary>
/// 点击按钮向右移动
/// </summary>
public void OnRightMoveClick()
{
redCar.moveDirection = 1;
}
}
2.4 黄色小车自动向下移动
黄色小车挂载脚本 YellowCar.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class YellowCar : MonoBehaviour
{
/// <summary>
/// 移动速度
/// </summary>
private int moveSpeed = 100;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
transform.localPosition -= new Vector3(0, moveSpeed * Time.deltaTime, 0);//向下移动
if(transform.localPosition.y <= -1060) Destroy(gameObject);//如果移动到屏幕最底端则自动销毁
}
}
2.5 红色小车与黄色小车碰撞则游戏结束
红色小车挂载组件 Box Collider 2D 和 Rigidbody 2D
黄色小车挂载组件 Box Collider 2D
结束界面挂载脚本 OverPanel.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;
public class OverPanel : MonoBehaviour
{
/// <summary>
/// 分数文本
/// </summary>
public Text scoreText;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
}
/// <summary>
/// 显示面板
/// </summary>
public void ShowPanel()
{
Time.timeScale = 0f;//游戏暂停
gameObject.SetActive(true);
}
/// <summary>
/// 点击按钮重新开始游戏
/// </summary>
public void OnRestartClick()
{
Time.timeScale = 1f;//游戏恢复
gameObject.SetActive(false);
SceneManager.LoadScene(0);
}
}
GameManager.cs 新增结束界面变量
public class GameManager : MonoBehaviour
{
/// <summary>
/// 游戏管理器实例
/// </summary>
public static GameManager insta;
/// <summary>
/// 主界面
/// </summary>
public MainPanel mainPanel;
/// <summary>
/// 结束界面
/// </summary>
public OverPanel overPanel;
...
2.6 更新界面分数
主界面
...
public class MainPanel : MonoBehaviour
{
/// <summary>
/// 红色小车物体
/// </summary>
public RedCar redCar;
/// <summary>
/// 分数文本
/// </summary>
public Text scoreText;
/// <summary>
/// 分数数值
/// </summary>
public int score;
/// <summary>
/// 开始时间
/// </summary>
private float startTime;
// Start is called before the first frame update
void Start()
{
startTime = Time.time;
}
// Update is called once per frame
void Update()
{
//更新分数
score = (int)(Time.time - startTime);
scoreText.text = "分数：" + score;
}
...
结束界面
...
public class OverPanel : MonoBehaviour
{
/// <summary>
/// 分数文本
/// </summary>
public Text scoreText;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
scoreText.text = "分数：" + GameManager.insta.mainPanel.score;
}
...
2.7 通过预设随机生成黄色小车
创建黄色小车根目录
...
/// <summary>
/// 创建黄色小车上一次时间
/// </summary>
private float lastTime;
/// <summary>
/// 黄色小车物体预设
/// </summary>
public GameObject preYellowCarGo;
/// <summary>
/// 黄色小车根目录
/// </summary>
public GameObject yellowCarRootGo;
// Start is called before the first frame update
void Start()
{
startTime = Time.time;
lastTime = Time.time;
}
// Update is called once per frame
void Update()
{
//更新分数
score = (int)(Time.time - startTime);
scoreText.text = "分数：" + score;
//每过3秒生成一辆黄色小车
if(Time.time - lastTime >= 3f)
{
CreateYellowCar();
lastTime = Time.time;
}
}
/// <summary>
/// 点击按钮向左移动
/// </summary>
public void OnLeftMoveClick()
{
redCar.moveDirection = -1;
}
/// <summary>
/// 点击按钮向右移动
/// </summary>
public void OnRightMoveClick()
{
redCar.moveDirection = 1;
}
/// <summary>
/// 创建黄色小车
/// </summary>
private void CreateYellowCar()
{
//在x坐标为-490到490之间随机生成黄色小车
GameObject yellowCarGo = Instantiate(preYellowCarGo, yellowCarRootGo.transform);
int randomInt = Random.Range(-490, 490);
yellowCarGo.transform.localPosition = new Vector3(randomInt, 1060, 0);
}
}
2.8 添加音频
创建游戏中音频物体
...
/// <summary>
/// 黄色小车根目录
/// </summary>
public GameObject yellowCarRootGo;
/// <summary>
/// 游戏进行中音频
/// </summary>
public AudioSource gameInAudioSource;
// Start is called before the first frame update
void Start()
{
startTime = Time.time;// 开始时间赋值
lastTime = Time.time;// 创建黄色小车上一次时间赋值
gameInAudioSource.Play();//播放游戏进行音乐
}
...
创建游戏结束音频物体
...
/// <summary>
/// 游戏技术音频
/// </summary>
public AudioSource gameOverAudioSource;
...
/// <summary>
/// 显示面板
/// </summary>
public void ShowPanel()
{
Time.timeScale = 0f;//游戏暂停
gameObject.SetActive(true);
//停止游戏进行音频，播放游戏结束音频
if (GameManager.insta.mainPanel.gameInAudioSource.isPlaying)
{
GameManager.insta.mainPanel.gameInAudioSource.Stop();
}
gameOverAudioSource.Play();
}
...
2.9 物体换皮
3.完整代码
GameManager
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class GameManager : MonoBehaviour
{
/// <summary>
/// 游戏管理器实例
/// </summary>
public static GameManager insta;
/// <summary>
/// 主界面
/// </summary>
public MainPanel mainPanel;
/// <summary>
/// 结束界面
/// </summary>
public OverPanel overPanel;
private void Awake()
{
insta = this;
}
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
}
}
MainPanel
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class MainPanel : MonoBehaviour
{
/// <summary>
/// 红色小车物体
/// </summary>
public RedCar redCar;
/// <summary>
/// 分数文本
/// </summary>
public Text scoreText;
/// <summary>
/// 分数数值
/// </summary>
public int score;
/// <summary>
/// 开始时间
/// </summary>
private float startTime;
/// <summary>
/// 创建黄色小车上一次时间
/// </summary>
private float lastTime;
/// <summary>
/// 黄色小车物体预设
/// </summary>
public GameObject preYellowCarGo;
/// <summary>
/// 黄色小车根目录
/// </summary>
public GameObject yellowCarRootGo;
/// <summary>
/// 游戏进行中音频
/// </summary>
public AudioSource gameInAudioSource;
// Start is called before the first frame update
void Start()
{
startTime = Time.time;// 开始时间赋值
lastTime = Time.time;// 创建黄色小车上一次时间赋值
gameInAudioSource.Play();//播放游戏进行音乐
}
// Update is called once per frame
void Update()
{
//更新分数
score = (int)(Time.time - startTime);
scoreText.text = "分数：" + score;
//每过3秒生成一辆黄色小车
if(Time.time - lastTime >= 3f)
{
CreateYellowCar();
lastTime = Time.time;
}
}
/// <summary>
/// 点击按钮向左移动
/// </summary>
public void OnLeftMoveClick()
{
redCar.moveDirection = -1;
}
/// <summary>
/// 点击按钮向右移动
/// </summary>
public void OnRightMoveClick()
{
redCar.moveDirection = 1;
}
/// <summary>
/// 创建黄色小车
/// </summary>
private void CreateYellowCar()
{
//在x坐标为-490到490之间随机生成黄色小车
GameObject yellowCarGo = Instantiate(preYellowCarGo, yellowCarRootGo.transform);
int randomInt = Random.Range(-490, 490);
yellowCarGo.transform.localPosition = new Vector3(randomInt, 1060, 0);
}
}
OverPanel
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;
public class OverPanel : MonoBehaviour
{
/// <summary>
/// 分数文本
/// </summary>
public Text scoreText;
/// <summary>
/// 游戏技术音频
/// </summary>
public AudioSource gameOverAudioSource;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
scoreText.text = "分数：" + GameManager.insta.mainPanel.score;
}
/// <summary>
/// 显示面板
/// </summary>
public void ShowPanel()
{
Time.timeScale = 0f;//游戏暂停
gameObject.SetActive(true);
//停止游戏进行音频，播放游戏结束音频
if (GameManager.insta.mainPanel.gameInAudioSource.isPlaying)
{
GameManager.insta.mainPanel.gameInAudioSource.Stop();
}
gameOverAudioSource.Play();
}
/// <summary>
/// 点击按钮重新开始游戏
/// </summary>
public void OnRestartClick()
{
Time.timeScale = 1f;//游戏恢复
gameObject.SetActive(false);
SceneManager.LoadScene(0);
}
}
RedCar
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class RedCar : MonoBehaviour
{
/// <summary>
/// 移动速度
/// </summary>
private int moveSpeed = 100;
/// <summary>
/// 移动方向
/// </summary>
public int moveDirection = 0;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
//屏幕范围内左右移动
if (moveDirection == -1 && transform.localPosition.x <= -490) return;
if (moveDirection == 1 && transform.localPosition.x >= 490) return;
transform.localPosition += new Vector3(moveDirection * moveSpeed * Time.deltaTime, 0, 0);
}
/// <summary>
/// 碰撞显示结束界面
/// </summary>
/// <param name="collision"></param>
private void OnTriggerEnter2D(Collider2D collision)
{
GameManager.insta.overPanel.ShowPanel();
}
}
YellowCar
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class YellowCar : MonoBehaviour
{
/// <summary>
/// 移动速度
/// </summary>
private int moveSpeed = 100;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
transform.localPosition -= new Vector3(0, moveSpeed * Time.deltaTime, 0);//向下移动
if(transform.localPosition.y <= -1060) Destroy(gameObject);//如果移动到屏幕最底端则自动销毁
}
}