Box Tower / 堆箱塔

游戏展示

Box Tower

游戏开发

创建 2D 游戏

略

设置分辨率 480x800

略

导入资源

略

Box / 箱子

从 Project 拖动 Box 资源到 Hierarchy

Inspector
- Rect Transform: reset(图片没有 reset)
  - Scale
    - X: 0.2
    - Y: 0.2

BG / 背景

从 Project 拖动 Box 资源到 Hierarchy > Main Camera

添加 Box Collider 2D

Inspector
- Box Collider 2D
  - Size
    - X: 4.85
    - Y: 4.85

添加 RigidBody 2D

Inspector
- RigidBody 2D
  - Size
    - Mess: 1
    - Linear Drag: 2
    - Angular Drag: 3

Game Over

Hirearchy
- Main Camera
  - Create Empty: Game Over
Inspector
- Tag: Game Over
- Rect Transform
  - Position
    - Y: -5.18
- Box Collider 2D
  - Is Trigger: True
  - Size
    - X: 26
    - Y: 0.15

Box Spawner / 箱子生成器

Hirearchy
- Main Camera
  - Create Empty: Box Spawner
Inspector
- Rect Transform
  - Position
    - Y: 3.7

Platform Holder

从 Project 拖动 Box 资源到 Hierarchy，重命名为：Platform Holder

Inspector
- Tag: Game Over
- Rect Transform
  - Position
    - Y: -4.8
  - Scale
    - X: 0.7
    - Y: 0.07
- Add Component += Box Collider 2D

Prefabs

创建新文件夹，Prefabs

Project
- Assets
  - Create
    - Folder: Prefabs

从 Hierarchy 拖动 Box 到 Prefabs

删除 Hierarchy > Box

Scripts

创建新文件夹，Scripts

Project
- Assets
  - Create
    - Folder: Scripts
  - Scripts
    - Create
      - C# Script
        
        BoxScript
        
        GameplayController
        
        BoxSwapner
        
        CameraFollow

附加脚本

Hierarchy
- Main Camera += CameraFollow
  - Box Swapner += BoxSwapner
- Create: Gameplay Controller
- Gameplay Controller += GameplayController

Project
- Assets
  - Prefabs
    - Box -> Inspector
Inspector
- Open Prefabs
```
* Add Component += `BoxScript`
```

BoxSwapner Script

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

public class BoxSwapner : MonoBehaviour
{
    public GameObject boxPrefabs;

    void Start()
    {
        SwapBox();
    }

    public void SwapBox()
    {
        GameObject boxObject = Instantiate(boxPrefabs);

        boxObject.transform.position = transform.position;
    }
}

Game Controller

删除 BoxSwapner Script 中的 Start()

diff --git a/Box-Tower/Assets/Scripts/BoxSwapner.cs b/Box-Tower/Assets/Scripts/BoxSwapner.cs
index 66f02dc..102da62 100644
--- a/Box-Tower/Assets/Scripts/BoxSwapner.cs
+++ b/Box-Tower/Assets/Scripts/BoxSwapner.cs
@@ -6,11 +6,6 @@ public class BoxSwapner : MonoBehaviour
 {
     public GameObject boxPrefabs;
 
-    void Start()
-    {
-        SwapBox();
-    }
     public void SwapBox()
     {
         GameObject boxObject = Instantiate(boxPrefabs);

BoxScript.cs

using UnityEngine;

public class BoxScript : MonoBehaviour
{
    private float minX = -2.2f;
    private float maxX = 2.2f;

    private bool canMove;
    private float speed = 2f;

    private Rigidbody2D myBody;

    private bool gameOver;
    private bool ignoreCollision;
    private bool ignoreTrigger;

    private void Awake()
    {
        myBody = GetComponent<Rigidbody2D>();
        myBody.gravityScale = 0f;
    }

    void Start()
    {
        canMove = true;

        if (Random.Range(0, 2) > 0)
        {
            speed *= -1f;
        }

        GameplayController.instance.currentBox = this;
    }

    // Update is called once per frame
    void Update()
    {
        MoveBox();
    }

    private void MoveBox()
    {
        if (canMove)
        {
            Vector3 temp = transform.position;
            temp.x += speed * Time.deltaTime;

            if (temp.x > maxX)
            {
                speed *= -1f;

            }
            else if (temp.x < minX)
            {
                speed *= -1f;
            }

            transform.position = temp;
        }
    }
}

GameplayController.cs

using UnityEngine;

public class GameplayController : MonoBehaviour
{
    public static GameplayController instance;

    public BoxSwapner boxSwapner;

    [HideInInspector]
    public BoxScript currentBox;

    public CameraFollow cameraScript;
    private int moveCount;

    private void Awake()
    {
        if (instance == null)
        {
            instance = this;
        }
    }

    private void Start()
    {
        boxSwapner.SpawnBox();
    }
}

效果：箱子可以左右来回的移动

完善代码

具体代码请查看 GitHub

导出游戏

File
- Build Settings (Shift + Cmd + B)

Build Settings

Player Settings

小结

两个物体 A,B 两者都有碰撞体 collider（Box Collider，Sphere Collider，Capsule Collider 等）当两物体相撞时，会进入 OnTriggerEnter() 和 OnCollisionEnter() 中的哪一个呢？

只会进入一个，A 和 B 的脚本只会进入同一个
A 或者 B collider 有一个勾选 isTrigger 或者两者都勾选 isTrigger A 和 B都可以进入 OnTriggerEnter() 方法，但是不可进入OnCollisionEnter方法。
A 和 B collider 都不勾选 isTrigger，A 和 B 能进入 OnCollisionEnter() 方法但是不能进入 OnTriggerEnter() 方法。

A isTrigger	B isTrigger	OnCollisionEnter	OnTriggerEnter
✅	✅	✅
✅			✅
	✅		✅
			✅

1	using UnityEngine;
2
3	public class BoxScript : MonoBehaviour
4	{
5	private float minX = -2.2f;
6	private float maxX = 2.2f;
7
8	private bool canMove;
9	private float speed = 2f;
10
11	private Rigidbody2D myBody;
12
13	private bool gameOver;
14	private bool ignoreCollision;
15	private bool ignoreTrigger;
16
17	private void Awake()
18	{
19	myBody = GetComponent<Rigidbody2D>();
20	myBody.gravityScale = 0f;
21	}
22
23	void Start()
24	{
25	canMove = true;
26
27	if (Random.Range(0, 2) > 0)
28	{
29	speed *= -1f;
30	}
31
32	GameplayController.instance.currentBox = this;
33	}
34
35	// Update is called once per frame
36	void Update()
37	{
38	MoveBox();
39	}
40
41	private void MoveBox()
42	{
43	if (canMove)
44	{
45	Vector3 temp = transform.position;
46	temp.x += speed * Time.deltaTime;
47
48	if (temp.x > maxX)
49	{
50	speed *= -1f;
51
52	}
53	else if (temp.x < minX)
54	{
55	speed *= -1f;
56	}
57
58	transform.position = temp;
59	}
60	}
61	}