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Del curso dictado por Michigan State University

Introduction to Game Development

2942 calificaciones

Michigan State University

Introduction to Game Development

2942 calificaciones

Curso 1 de 5 en SpecializationGame Design and Development

If you love games and want to learn how to make them, then this course will start you down that path. Making games is a creative and technical art form. In this course you will familiarize yourself with the tools and practices of game development. You will get started developing your own videogames using the industry standard game development tools, including the Unity3D game engine and C#. At the end of the course you will have completed three hands-on projects and will be able to leverage an array of game development techniques to create your own basic games. This course is for individuals interested in becoming a game designer, game artist, or game programmer.

De la lección

Intro to Unity3D Development

One of the reasons we use Unity3D is its visual editor which makes creating interactive games accessible to both creative and technical individuals. In this module, you will create your first Unity3D project from start to finish. Using a variety of graphical and audio assets and a library of scripts, you will create a simple model of our solar system. By the end of the module, you should have a good understanding of the Unity3D editor and the workflow for creating games.

Conoce a los instructores

Brian Winn
Associate Professor
Media and Information

[MUSIC]

In this video we'll briefly discuss how audio works in Unity and

then add audio to our solar system.

The basic concept of audio in Unity is fairly simple.

You have an audio listener component which,

like a microphone, picks up audio from certain locations in the environment.

The audio listener component is often attached to the camera.

You only have one audio listener component turned on at any one time in your

Unity scene.

You also have audio source components attached to gameObjects within the scene.

The audio listener picks up the sound emitted from the audio sources.

Unity supports 3D positional sound.

That is, the audio listener will pick up the audio from the audio source

based on its relative position in 3D space.

So if the audio source is to the right of the audio listener,

it'll come out of the right speaker.

If it's to the left, it'll come out of the left speaker.

If it's close to the audio listener, it'll be loud.

If it's farther away, it'll be softer.

So our objectives for this video will be to add some sound to the Sun and

add some sound to the Earth to create a more rich,

auditory experience in our solar system.

So let's go ahead and look at the main camera.

If I select it over here in the inspector you can see that there's actually an audio

listener component attached to that.

The audio listener is a pretty simply component.

There are no properties, we can just turn it on or off in essence.

So we've got the audio listener on the camera and let's go ahead and

add a sound for the sun.

So if I go ahead and look at the Sounds folder,

you can see that I've got a burning sound.

So let me select that.

And over here in the inspector we can actually preview it.

[SOUND] So

it basically just sounds like something burning.

Once again, there's many different ways of doing things.

I always like shortcuts, so we can basically take that burning sound,

drag and drop it right onto the Sun gameObject, and if I go back to the sun,

we can see now it's got a audio source attached to it.

The audio source component actually has several properties,

one of those being loop.

So we want this sound to continually play.

If we don't select loop, it'll basically play the few seconds of the sound clip,

and then end.

But we want it to continually play, so I'm gonna go ahead and check that.

So let's go ahead and play.

[SOUND] So as we're playing, we can adjust things.

So another property is the volume.

So the volume is set at 1.

Let me pull it down to 0.3 or something like that.

So that's like a 30%, 0.3.

And we can jut barely hear the sun burning, or

maybe we can increase that a little bit to 0.5, for example.

Now once again, I'm in play mode so any change that I make is not gonna stick.

It's just for, you know, essentially testing purposes and

trying to figure out what I actually want.

So now that I have what I want, I could stop it, go in here for

volume and change this to 0.5.

Let's also add a sound to the Earth.

For purposes of example, I can select the Earth.

I can go to component.

Move down to audio and add an audio source.

This is the sort of manual way of doing it.

Dragging and dropping a sound right on a gameObject is probably the quicker way.

But by doing that you can see I've added the audio source component.

Right now there is no audio clip set so I need to select my audio clip.

So I can click the little selection target thing here and

this will show all of the possible audio clips that we've got.

I'm gonna go ahead and select the drone hum sound effect and

set that as the audio clip for this audio source.

And go ahead, let's go ahead and hit play.

[SOUND] So you can somewhat tell as the Earth gets closer,

the sound gets louder, and as it gets farther away, it gets quieter,

since the Earth is actually moving closer and farther from our camera.

The other thing I forgot to do is turn on looping, so

you can see that the sound stopped.

So let's go ahead and stop that, turn on looping.

And let's scroll down a little bit.

There's 3D sound settings down here, let me go ahead and press play.

We can just play with some of these things as we play and

kinda get what we want once again.

So one thing, and they have a doppler level which basically kind of creates

a doppler effect on the sound as it's moving.

Right now that's set at one.

I could turn off the doppler effect if I want to.

The next thing is a volume roll off, and it's sort of visually represented here.

The minimum distance is one meter.

So if I'm closer then one meter, I'm not gonna hear the sound.

The maximum distance is 500.

So let me adjust this a bit.

Let me go down to, let's say, five.

And now our little diagram here, really kinda shows what's going on.

And it shows the sort of respective volume of the sound as it gets

closer to the audio listener and as it goes farther away.

[COUGH] I'm sorry, I misspoke earlier.

The one meter, it basically peaks out.

So, from one down to zero it'd be maximum volume.

So if I adjust this up, you know you're gonna see maximum volume.

As it gets a little bit farther away.

So let's go back down to 1, and

after five meters it will basically drop down to no sound.

So maybe something like ten meters is a pretty good sign.

Now this graph down here, you can actually drag and drop and

tweak however you want it cuz you create sort of a custom roll off.

And once again I'm in play mode so

everything I'm doing is not going to stick.

So if I stop, I can then go back and play with this and make it stick.

So once again I can turn off the doppler.

I can set the maximum distance to 10 meters rather than 500 meters.

So, one thing that we can do just as sake of example is go ahead and

press play again and

let's go back to the main camera and with the audio listener component,

if I just turned it off, you can see, you know, I basically turned off the sound.

The sound still exists, it's still playing, I'm just not listening to it.

It's sort of the tree falling in the forest concept.

If I turn the Audio Listener back on, once again I'm listening.

So, you know, this I'm doing in the editor.

Obviously, in an actual game, we could programmatically control the audio

listener to turn on or turn off, or switch from one audio listener to another

if we had, for say, multiple cameras in a racing game.

Or maybe we've got a camera in the car and a chase camera and that sort of thing.

So in any case, we've got audio in our game now,

and our overall simulation is really starting to come together.

So what's next?

In the next video, we will discuss a bit more about the camera gameObject.

[MUSIC]

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