Unity编程实战：操控Mesh指南

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"Unity中对Mesh编程的教程" 在Unity3D游戏开发中，掌握对Mesh的编程是非常关键的技能。Mesh是三维图形的基础，它包含了物体的几何形状信息，如顶点、边和面。本教程将深入探讨如何通过脚本与Unity中的Mesh进行交互，从而实现更灵活和动态的游戏效果。首先，我们来看一下本教程的目标。当你完成这个教程后，你将能够创建一个看起来类似于示例截图的游戏。游戏的基本玩法是引导一个球进入一个盒子里。为了实现这一点，你将通过代码绘制线条作为背景，这些线条可以让球弹射。这是一种利用物理碰撞和用户交互来增加游戏趣味性的方法。在开始之前，你需要了解一些基础知识。在Unity中，像"Transform"、"Collider"和"LineRenderer"这样的词汇通常表示类名。这些类在Unity引擎中扮演着重要的角色，Transform用于处理对象的位置、旋转和缩放；Collider负责处理物理碰撞；而LineRenderer则用于在场景中绘制连续的线段，比如我们的游戏中的线条。如果你对这些概念不熟悉，别担心，教程会提供相关的官方文档链接供你查阅。当提到像"OnMouseDown()"、"Update()"或"StealTheNoodles()"这样的内容时，这些都是Unity中特定的函数。例如，OnMouseDown()是在用户点击对象时调用的事件函数；Update()是每帧都会执行的函数，适合处理持续更新的任务；而"StealTheNoodles()"可能是自定义的函数名，代表特定的游戏逻辑。在语言方面，本教程可能涉及到C#，因为这是Unity最常用的脚本语言。通过C#，你可以编写控制Mesh、碰撞检测和用户交互的代码。学习如何创建和修改Mesh，如添加、移动或删除顶点，以及如何在运行时动态更新Mesh，都将大大提升你在Unity中的编程能力。教程中，你可能会学到以下知识点： 1. Mesh类的使用：包括创建Mesh、获取和设置顶点、边和面的信息。 2. 计算三角形索引和法线：确保渲染正确并支持光照计算。 3. MeshFilter和MeshRenderer组件：如何将创建的Mesh应用到游戏对象上。 4. 物理系统：如何结合Collider组件实现碰撞检测和反弹效果。 5. LineRenderer的使用：配置和更新线段，用于绘制游戏中的路径或边界。 6. 用户输入处理：通过OnMouseDown()等事件响应用户操作。 7. 更新逻辑：在Update()函数中处理游戏状态的更新。通过这个教程，你不仅能学会如何在Unity中编写与Mesh相关的代码，还能加深对游戏逻辑和用户交互的理解。这将对你的项目开发大有裨益，无论你正在制作的是简单的练习还是复杂的游戏。准备好深入探索Unity的Mesh编程世界吧！

Assuming you’ve read the blog post linked at the beginning of this

tutorial, you should have a fairly good understanding of what’s happening

here, even if you’ve never heard of the LineRenderer component before.

Basically, a LineRenderer is a component that renders lines based on values

that the programmer(you) inputs. In this instance, we are putting two Vector3s

into the LineRenderer. As you have probably figured out by this point, these

two vectors are the mouseHit variable(which is of course assigned to the

position of the mouse when the click occurred) and the current position of the

mouse(returned by MousePoint()).

There’s one last thing to do before we go back to Unity. Add this line to

the end of your script:

This tells Unity that we want a LineRenderer component on whatever

gameobject we’re tied to. More on that in a minute.

Enjoy the fruits of your labor!

Congratulations! You are now at that glorious stage of the tutorial where

you can press the big black button and see it change to the big glowy

blue button. Almost. Yeah, there’s still a little bit left to do. First, drop your

‘Level’ script onto the gameobject you created in the first part of the

tutorial(the one with the big box collider). Note that Unity autmagically adds

a LineRenderer component to the gameobject as well. That is the purpose of

the ‘@script RequireComponent(LineRenderer)’ line.

Next, check your script to make sure everything matches up:

function Update(){

! if(dragging){ //i.e if the mouse is down...

! !GetComponent(LineRenderer).enabled = true; //if we're

dragging, we want to draw a line

! !GetComponent(LineRenderer).SetPosition(0, mouseHit); //set

the first point of the line renderer to the position of the

mouse when the click occurred

! !GetComponent(LineRenderer).SetPosition(1,

MousePoint()); //grab the current position of the mouse and

make the line draw to it

! } else { //if we've received a MouseUp event and we're not

dragging anymore, we

! !GetComponent(LineRenderer).enabled = false; //stop drawing

the line

}

Click!

The player drags the mouse

Boink!

Update()

Every time Update() is called, we grab the mouse

position using our MousePoint() method and tell

the LineRenderer to draw it’s second vertex there.

The red line represents - well, the line we draw

using the LineRenderer.

@script RequireComponent(LineRenderer)

Note that there is no ‘;’ at the end

of this line.

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KyleLin740

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