记录步骤：win+R→PSR.exe

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一、竖屏设置

分辨率设为9：16

二、主控脚本

• 添加一个空节点，命名“游戏主控”

• 新建游戏的主控脚本，命名为MyGame.cs,方便管理(即，一些全局性的逻辑控制)

• 如有必要，修改主控脚本的Execution Order(优先级)

  1 using System.Collections;
  2 using System.Collections.Generic;
  3 using UnityEngine;
  4
  5 public class MyGame : MonoBehaviour
  6 {
  7 //添加全局性的设置
  8 // Start is called before the first frame update
  9 void Start()
  10 {
  11 Application.targetFrameRate = 60;//帧数设为60
  12 }
  13
  14 // Update is called once per frame
  15 void Update()
  16 {
  17
  18 }
  19 }

三、制作子弹

• 制作预制体

子弹运动：

1 using System.Collections;
2 using System.Collections.Generic;
3 using UnityEngine;
4
5 public class Mybullet : MonoBehaviour
6 {
7 public float speed = 3.5f;
8 // Start is called before the first frame update
9 void Start()
10 {
11
12 }
13
14 // Update is called once per frame
15 void Update()
16 {
17 float dy = speed * Time.deltaTime;
18 transform.Translate(0, dy, 0, Space.Self);
19 Vector3 sp = Camera.main.WorldToScreenPoint(transform.position);
20 if (sp.y > Screen.height)
21 {
22 Destroy(this.gameObject);
23 }
24 }

四、制作飞机

• 控制飞机左右移动

• 添加预制体资源：public GameObject myPrefab;

• 断开预制体：unpack Prefab

  1 using System.Collections;
  2 using System.Collections.Generic;
  3 using UnityEngine;
  4
  5 public class Myplane : MonoBehaviour
  6 {
  7 public GameObject MyPrefab;
  8 private float interval=0.4f;//间隔时间
  9 private float count = 0;
  10
  11 // Start is called before the first frame update
  12 void Start()
  13 {
  14 Application.targetFrameRate = 60;
  15 }
  16
  17 // Update is called once per frame
  18 void Update()
  19 {
  20 count += Time.deltaTime;
  21 if (count >= interval)
  22 {
  23 count = 0;
  24 Fire();
  25 }
  26 //键盘控制飞机的左右移动
  27 float step = 2.5f * Time.deltaTime;
  28 if (Input.GetKey(KeyCode.LeftArrow))
  29 {
  30 transform.Translate(-step, 0, 0);
  31 }
  32 if (Input.GetKey(KeyCode.RightArrow))
  33 {
  34 transform.Translate(step, 0, 0);
  35 }
  36 }
  37 void Fire()
  38 {
  39 GameObject bullet = Instantiate(MyPrefab);
  40 bullet.transform.position = transform.position + new Vector3(0, 1f, 0);
  41 }
  42 }

五、制作怪物

• 添加到游戏主控MonsterCtrl.cs

• 不断生成

• 随机头像

• 大小优化

• 随机位置

  1 using System.Collections;
  2 using System.Collections.Generic;
  3 using UnityEngine;
  4
  5 public class Mymonster : MonoBehaviour
  6 {
  7 public float speed = 1.0f;
  8 // Start is called before the first frame update
  9 void Start()
  10 {
  11
  12 }
  13
  14 // Update is called once per frame
  15 void Update()
  16 {
  17 float dy = speed * Time.deltaTime;
  18 transform.Translate(0, -dy, 0,Space.Self);
  19 Vector3 sp = Camera.main.WorldToScreenPoint(transform.position);
  20 if (sp.y <0)
  21 {
  22 Destroy(this.gameObject);
  23 }
  24 }
  25 }

  1 using System.Collections;
  2 using System.Collections.Generic;
  3 using UnityEngine;
  4
  5 public class MonsterCtrl : MonoBehaviour
  6 {
  7 public GameObject monsterPerfab;
  8
  9 public Sprite[] images;
  10
  11 // Start is called before the first frame update
  12 void Start()
  13 {
  14 InvokeRepeating("CreatMonster", 0.1f, 2f);
  15 }
  16
  17 // Update is called once per frame
  18 void Update()
  19 {
  20
  21 }
  22
  23 void CreatMonster()
  24 {
  25 float x = Random.Range(-2, 2);
  26 float y = 5;
  27 GameObject monster = Instantiate(monsterPerfab);
  28 monster.transform.position = new Vector3(x, y, 0);
  29
  30
  31 //随机怪物
  32 int index = Random.Range(0, images.Length);
  33
  34 SpriteRenderer renderer = monster.GetComponent();
  35 renderer.sprite = this.images[index];
  36
  37 //怪物大小设为100px(像素)
  38 Sprite sprite = this.images[index];
  39 float imgWidth = sprite.rect.width; // 图像的实际宽度
  40 float scale = 100/imgWidth; //缩放比例
  41 monster.transform.localScale = new Vector3(scale, scale, scale);
  42 }
  43 }

六、击中目标

• “子弹”与“怪物”之间的碰撞处理：

1. 添加Rigidbody 2D及Collider 2D

2. 添加Tag：player，Bullet，Monster（用于身份识别）

3. 修改MyBullet.cs,添加碰撞处理

   1 using System.Collections;
   2 using System.Collections.Generic;
   3 using UnityEngine;
   4
   5 public class Mybullet : MonoBehaviour
   6 {
   7 public float speed = 3.5f;
   8 // Start is called before the first frame update
   9 void Start()
   10 {
   11
   12 }
   13
   14 // Update is called once per frame
   15 void Update()
   16 {
   17 float dy = speed * Time.deltaTime;
   18 transform.Translate(0, dy, 0, Space.Self);
   19 Vector3 sp = Camera.main.WorldToScreenPoint(transform.position);
   20 if (sp.y > Screen.height)
   21 {
   22 Destroy(this.gameObject);
   23 }
   24 }
   25 private void OnTriggerEnter2D(Collider2D collision)
   26 {
   27 if (collision.tag.Equals("Monster"))
   28 {
   29 Destroy(collision.gameObject);
   30 Destroy(this.gameObject);
   31 }
   32 }
   33 }

七、游戏背景

• 添加到游戏主控background.cs

• Order in Layor:-10

• 俩图片无缝连接：Deplicate（复制）

  1 using System.Collections;
  2 using System.Collections.Generic;
  3 using UnityEngine;
  4
  5 public class background : MonoBehaviour
  6 {
  7
  8 Transform bg1;
  9 Transform bg2;
  10
  11 public float speed = 1.0f;//向下运动速度
  12 // Start is called before the first frame update
  13 void Start()
  14 {
  15 //找出变化路径
  16 bg1 = GameObject.Find("/背景/bg1").transform;
  17 bg2 = GameObject.Find("/背景/bg2").transform;
  18
  19 //手动确定背景图片的位置从而无缝连接
  20 bg1.position = new Vector3(0, 0, 0);
  21 bg2.position = new Vector3(0, 10, 0);
  22 }
  23
  24 // Update is called once per frame
  25 void Update()
  26 {
  27 float dy = speed * Time.deltaTime;
  28 bg1.Translate(0, -dy, 0);
  29 bg2.Translate(0, -dy, 0);
  30 //图片循环显示
  31 if (bg1.position.y <= -10)
  32 {
  33 bg1.Translate(0, 20, 0);
  34
  35 }
  36 if (bg2.position.y <= -10)
  37 {
  38 bg2.Translate(0, 20, 0);
  39 }
  40 }
  41 }

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• 物理系统：Physics

由物理规律起作用的系统：刚体（RigidBody）→指物理系统中的物体（具有质量、速度、可反弹…）

Add Component→Physics 2D→Rigidbody 2D

刚体有三种类型：

Dynamic:普通刚体，有质量，有速度

Static：静态刚体，质量无穷大，无速度（适用于建筑物、地面等固定不动的物体）

Kinematic:运动学刚体，无质量（忽略物理规律的刚体，一般用于碰撞检测）

只有添加撞体（Collider）组件后，才有碰撞的计算

Add Component→Physics 2D→Box Collider 2D

• * 方形：Box Collider 2D
  • 圆形：Circle Collider 2D
  • 不规则边缘：Edge Collider 2D
  • 胶囊形状：Capsule Collider 2D

刚体的反弹：

　　1.在project窗口里，Create→Physics Material 2D…

• * Friction：摩擦系数

  • Bounciness：弹性系数，设为1（完全反弹（无能量损耗））　

    　　　　2.选择“皮球”的Rigidbody2D组件

• * Material:选择….材质　　

  　　　　3.运行游戏，观察反弹