Play Again

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En provenance du cours de Michigan State University

Introduction to Game Development

2943 notes

Michigan State University

Introduction to Game Development

2943 notes

Cours 1 sur 5 dans Specialization Game 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.

À partir de la leçon

Designing and Coding Gameplay Systems

Now, don't get scared, but games need code. Code is the canvas upon which game systems are painted. However, that doesn't mean you need to be a C# ninja. In this module, you will start to learn the ins-and-outs of programming C# in Unity. You will apply this knowledge to build a first person shooter game, called Box Shooter. By the end of the module, you will have the tools to begin to develop your own custom games!

Game Manager12:24

Particles and SFX5:30

Rencontrer les enseignants

Brian Winn
Associate Professor
Media and Information

[MUSIC]

Since our mouse cursor is locked and invisible, it's difficult to have a play

again button that we can click on with the mouse pointer.

Rather than have a 2-D button as we've done before, in this video we'll create

a 3-D that we can shoot in the scene, much like how we shoot the target.

Our objectives will be to create a game object with 3D text for

the play again button.

Apply a collider and the play again button script to make it functional.

Examine the code and polish the experience so

the play again button's field dynamic can only appear in the game overstate.

I'm going to create my game object for my play again button.

To do that, I'm going to go under create, 3D objects, and I'm going to pick 3D text.

You can see it appears out there in the world,

and I want to position this in front of my camera.

I'm going to position it at maybe zero.

Perhaps three meters high and then at 14 meters in the z direction, so

you can see it right up there in front of my camera.

And let's go ahead and set up the text.

So, right now it says, hello world.

I'm gonna make it all caps.

Play again.

I want to align it to the middle center and you can see it now as more centered.

I'll set the alignment to center as well and

I'm going to set the font style to bold.

And let's go ahead and modify the color, so I'll click the color swatch.

I'm going to leave it at white but I'm going to make it sort of semi-transparent

so rather than 255, I'll set it to 150.

So it's somewhat transparent.

Now we need to detect collisions on this game object, so let's go ahead and

add a box collider so that the projectile can run into it.

So let me click Add Component, Physics, and choose Box Glider.

And if I zoom in up here in the scene view,

you can see now the green outline reflects that Box Glider.

Right now the size is zero thickness, so let me change this to one to give a little

bit of thickness to the Box Glider to help it detect that collision.

And make it a little bit easier to shoot.

Now I've already created a script called PlayAgain, so let's go ahead and

attach that to this game object.

And let's double-click on it to do a quick walk-through.

You can see this is sorta very simplified version of our target behavior.

It looks for a CollisionEnter, and it checks to see if the game object that

it was collided with is tagged as projectile.

And if it was, it tells the game manager to run the restart game function.

So let's go back to Unity and test this out.

So if I shoot this, notice at the bottom I got an error message.

[MUSIC]

Let me exit out and click on this.

It says level couldn't be loaded because it has not been

added to the build settings.

And notice the sort of double quote there.

I think those are two single quotes saying that the level name is nothing.

So let's go back to the game manager and

notice that we never defined the play again level to load.

So let's go ahead and do that.

Level One because that's the name of our level and hit Play Again.

[MUSIC]

[SOUND] And once my timer runs out,

lets go ahead and shoot Play Again.

And it starts the game over.

Just go ahead and stop.

So our Play Again button functions the way that we want it to function.

Now we just need to set it up a little bit more.

So let's go ahead and rename this from New Text to Play Again.

And then let's make this into a pre-fab, because we're gonna

actually have multiple of these buttons on the screen when the game is over.

So let's make that into a pre-fab.

We'll keep the one that's out there, there.

And let me switch to a top-down view.

Basically, what I wanna do is have four of these kind of in each four

quadrants of my world.

So I'm gonna go ahead and duplicate this Play Again, and it creates a second wand.

And I wanna reposition this to the other side of the world.

So I'll leave it at 0, 3.

But rather than 14, let me make it at negative 14, so it's on the other side.

But of course, it's gonna be facing backwards.

You can see that if I spin around here.

So it'll be facing backwards to the player.

So I need to rotate it.

So let me rotate it 180 degrees.

Let's go ahead and create another one.

Duplicate it.

We'll position this one 14 units in the x-direction.

They're all going to be three high in the Y.

And at zero in the Z.

That's right on the other side, but we're going to have to rotate this one as well.

So, let's rotate it to negative 90.

And check to see if that's accurate.

It looks accurate.

And we'll go ahead and duplicate this play again to create a second copy,

and then we want to make it negative 14 in the extraction, so it's on the other side.

And then we need to rotate it properly.

So right now, it's backwards.

So let's make this rotation as 270 degrees.

So now you can see we've got four Play Again buttons.

Sort of around the player, no matter which way their facing,

they'll see a Play Again button.

Let's go ahead and create an empty game object to hold these.

So I'll create empty, and name this PlayAgain Buttons.

I'm gonna reset the transform to be at zero, zero, zero.

And let me go ahead and

add all four of these game objects to that empty game object.

Now to make this a little more interesting visually, I want these to rotate.

And since I put this all into a continual game object, I can put the rotation on it.

So if I select this you can kind of simulate that by going to rotation under

y and seeing the sort of nice rotation effect that we're gonna get.

So I need to go back and let's add a component.

Of course we're gonna do this with a script.

And I've already got a script called rotate.

Which rotates around a various axis.

So let me make it around the Y axis.

And I'll just leave this be to ten.

And you could certainly do a code walk-through of this.

It's very similar to our target mover script.

And the final thing I need to do is set our game manager to basically control

our Play Again button.

So we don't want these on the screen all the time so

initially I'm gonna make this inactive so we don't see it.

And under the Game Manager, we can actually attach the Play Again

buttons which will actually make this active after the game is over.

So let me go ahead and do that.

And let's go ahead and play.

[MUSIC]

And I'll just let the game run out very quickly.

We can see GAME OVER, our PLAY AGAIN comes to the screen, and

it's rotating around the world and I can target one of them.

Shoot it and my game restarts.

In the next video we'll add visual and

audio polish to the game through particle effects and additional sound effects.

[MUSIC]

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