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Sprites and Game Objects

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Introduction to C# Programming and Unity

科罗拉多大学系统

4.8（438 个评分） | 16K 名学生已注册

课程 1（共 5 门，C# Programming for Unity Game Development 专项课程）

This course is all about starting to learn how to develop video games using the C# programming language and the Unity game engine on Windows or Mac. Why use C# and Unity instead of some other language and game engine? Well, C# is a really good language for learning how to program and then programming professionally. Also, the Unity game engine is very popular with indie game developers; Unity games were downloaded 16,000,000,000 times in 2016! Finally, C# is one of the programming languages you can use in the Unity environment. This course doesn't assume you have any previous programming experience. Don't worry if you've never written code before; we'll start at the very beginning and work our way up to building small games by the end of the course. Throughout the course you'll learn core programming concepts that apply to lots of programming languages, including C#, and you'll also learn how to apply those concepts when you develop games. Computer programming is really fun in general, and programming games is even better! Caution: Beginning (assuming no prior programming knowledge) is not the same as easy (not hard to do). Learning to program IS hard to do, especially since this course is essentially the first half of a freshman-level college course. Meeting the course challenges while you master the material will be rewarding to you, but doing that will require hard work and maybe even a few expletives along the way. Module 1: Write your first C# console application and Unity script and learn how we store data in our programs Module 2: Learn how we use classes and objects to implement our code Module 3: Learn the basics of Unity 2D games and discover how we make decisions in our code Module 4: Get and use player input in your Unity games Module 5: Complete final peer review and take "Final Exam" “Unity” is a trademark or registered trademark of Unity Technologies or its affiliates in the U.S. and elsewhere. This course is an independent work and is not sponsored by, authorized by, or affiliated with Unity Technologies or its affiliates

查看授课大纲

您将学习的技能

Video Game Development, C Sharp (C#) (Programming Language), Unity (User Interface), Game Programming

审阅

4.8（438 个评分）

5 stars
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MR

Apr 09, 2018

Fantastic course!\n\nDr. T creates the best learning curve by balancing perfectly the level of difficulty in their courses. Worth it even for intermediate C#/Unity programmers.

EJ

Apr 08, 2019

This is a great course for those who want to learn C# for Unity. Dr. T is very effective in his instructions plus the program exercises will make you learn C# in no time. :-)

从本节课中

Unity 2D Basics and Selection

In this module, you'll learn some of the basic ideas behind using Unity to develop 2D games. You'll also learn how we can make decisions in our code.

Lesson Introduction0:48

The Unity Editor3:53

Sprites and Game Objects7:31

Unity's Component System3:57

Scripts as Components3:59

Debugging a Unity Script in MonoDevelop5:54

Debugging a Unity Script in Visual Studio2:52

2D Physics11:34

Colliders and Physics Materials, Part 16:49

Colliders and Physics Materials, Part 28:38

教学方

Dr. Tim "Dr. T" Chamillard
Associate Professor

脚本

In this lecture you'll learn how to add sprites to your game and

how to add game objects to the scenes in your game.

So before we continue you should do an in-video quiz about what you know

about sprites.

So let's start by talking about sprites.

Sprites are graphical assets that we include in our game.

Now a sprite can be a single image, or a single frame, if you will.

Or it can be a set of frames that we could use for an animation for

something in our game.

And so, those sprites that are sets of frames are regularly called sprite sheets,

or sprite strips.

So you should do another in-video quiz telling me about sprite strips.

Okay, the other thing we should talk about today are game objects.

And game objects are the entities that are actually in our game.

So we add game objects to a scene in Unity, and then that

game object is a thing that behaves within the context of the game world.

So let's go to Unity and start looking at how we actually do this.

So we'll start with the default project that we

looked at last time as we were exploring the Unity editor.

And this time, we're going to add a sprite and a game object to our scene in Unity.

The first thing I'm going to do is to actually save the scene.

So I'll come over here into the Project window and right-click and

say I want to Create a folder.

And I'm going to call this folder scenes, and then I'm going to Ctrl+S and

Save the current scene into scene0 in that folder.

And, of course, you don't always have to call yours scene0,

that's just what I tend to do.

The next thing I'm going to do is add a sprite to my project.

And so I will right-click here in the Project window again and

create another folder, this one I'll call sprites.

And now I need to get a graphical image added to the sprites folder.

And Unity supports a wide range of formats,

including PNGs and JPEGs and so on.

So I typically use PNGs for everything.

And so that's what I'm going to do.

And there are a variety of different ways to add an image to the sprites folder.

Of course, you can just use your operating system to copy the image

file into your sprites folder, I'm going to show you another way.

So you can also just drag from whatever you have that sprite saved,

onto the sprites folder like that.

And the sprite then gets added to your project.

I'll turn on Windows Magnifier, and

so we can see if we expand scenes, we have scene0 saved there.

And if we expand sprites, we have the teddybear saved there.

So that gives us a sprite in our project for the game.

It's not in the scene yet.

Remember, the Project window holds every asset that we have for

our game in its entirety.

And the Hierarchy window holds the things that are in our current scene.

So let's actually add the sprite to our scene.

And the way we do that is drag it, And drop it onto the scene.

And I'm actually going to rename it as well,

just because I like to use capitalization regularly.

So the general rule I will use is that I will capitalize

each word in the names of my game objects,

just like you'd capitalize each word in constants that you declare.

You'll notice there's a little asterisk next to scene0.

That means we have unsaved changes in the scene, so I'll Ctrl+S to save my scene.

Now, you can see that my teddy bear is pretty small in the game view and

I'm going to fix that in a moment.

Before I do,

I want to show you that if I double-click on the teddy bear in the Hierarchy window.

I actually zoom right into him in the scene view, so

that I can see him up close and personal.

And we'll find soon that that's helpful when we're manipulating

details about colliders, for example, for our teddy bear.

Okay, so let's actually make the teddy bear larger.

There's a variety of ways we can do that.

One way would be to come over here to the inspector and

change the scale of the teddy bear.

But I will tell you if we blow him up, I don't mean to explode him,

if we make him larger he's going to get more pixelated and

blurrier than he is right now, so I don't want to take that approach here.

Instead, what I'm going to do is I will select the Main Camera.

And over here, one of the characteristics of the Main Camera is the Size.

And so I'm just going to change that from 5 to 3.

And that makes the teddy bear the size that I want it to be in my game.

I am going to get rid of the magnifier now.

Now I will say that having to change the camera size is kind of awkward,

but I have a set of assets that are to a particular scale.

And so those assets are a little too small for

the default camera size of 5 in our Unity game.

There's an important lesson here.

And the important lesson is you should know before you have all of your art done,

you should know what your standard sizes are going to be for that art, so

that you can make sure your artist gives you the art that's the appropriate size.

My artist for my teddy bears did a fantastic job,

it's just that these are old assets that are even pre-Unity, and

so they're just a little too small for the default camera size.

So we can modify the camera size, and that lets us use assets that are maybe a little

too small, but the better idea is to make sure that the sprite, the PNG files or

whatever format you choose to use, are actually the appropriate size.

Speaking of the PNG files, I'm zooming in on the teddy bear in paint.net.

You will notice, down here on the bottom right, that my image is 32 by 32.

As a general rule, you should make sure your art assets

are a power of two on width and height.

So they don't have to match, it doesn't always have to be 32 by 32.

You could have an asset that's 8 by 64.

But each dimension of your asset should be a power of two.

And really that's to make the graphic card work as efficiently work as possible.

So you'll see assets that I provide to you that have transparency around them, and

you'll wonder why didn't I crop it to be tight against the edges

of whatever the asset is.

And that's because I wanted to make sure that each of the dimensions

was a power of two.

To recap, today we learned that sprites are graphical assets that we can include

in our game and we learned how to add those to our project.

And we learned that game objects are the entities that are actually in our scene

and we learned how to add those to our scene as well.

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