Enemies

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En provenance du cours de Michigan State University

Introduction to Game Development

3047 notes

Michigan State University

Introduction to Game Development

3047 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

Creating Games in Unity3D

Unity3D is a powerful tool for creating games. In this module, you will create your first actual game from start to finish, called Roller Madness. This ball rolling game will introduce you to the concepts of physics, health and damage, pickups, enemies, spawners, a user interface, and a variety of visual and audio effects. This is your right of passage into game development!

Game Manager4:52

Rencontrer les enseignants

Brian Winn
Associate Professor
Media and Information

[MUSIC]

This game would be a lot more challenging if there were enemies in

the world to avoid.

In this video, we'll add enemies to the game.

Our objectives will be to create an enemy gameObject and set it up.

In doing so, we will review several of the concepts that we've covered so far.

Okay, we're gonna create our enemy gameObject.

And to do this, we're gonna hearken back to our first project where we created just

primitive assets.

So I could use some of the prototyping assets, but for sake of example,

let's go up and say Create>3D Object, and make a cube.

Okay, so the cube is created.

It's not in the center, so let me go ahead and reset that so we can see it.

It's essentially a one by one by one cube.

Let me select that here in the scene view.

I'm still in 2D mode let me switch back to 3D and drag this up.

And of course I want to rename this, not cube, I want to name it Enemy.

And we need to create a material, so let me go ahead and look at my materials.

I'm gonna base this off of a death zone material.

So let me go ahead and select that and duplicate it, and

rename it my Enemy Material.

And let's change the albedo texture from the white swatch to an orange swatch.

And I'm going to check and

I'm going to change the tint color back to just pure white.

So it's gonna be kind of an orange looking enemy.

And now that that material is set up, I'm gonna go ahead and drag and

drop it on the cube.

So we've got an orange enemy.

So there's various components or

scripts that we need to attach to the enemy to make it do what it needs to do.

So let me go ahead and choose add component.

Go down to scripts.

One of those is the Chaser script.

So the Chaser script basically makes a gameObject chase another gameObject,

which is exactly what we want our enemy to do, so let me choose that.

You can see there's a speed.

Right now, it's 20.

Just by testing before, I know this is pretty fast.

So let me change this to something like four.

Minimum distance is how close will it get?

You know, I'm gonna say zero so

it you know will try to get right on top of the enemy if possible.

And then there's a target.

So the target we can specify as roller ball.

Basically, the way the script works though is if the target isn't specified,

it will default to a player tagged game object.

But let me go ahead and specify that to start out with.

Okay, we have the chaser set up.

Let me go ahead and play this so you can see that.

Right now it's right on my ball, so my ball fell right on top of it.

But you can see the enemy is essentially chasing me around the world.

Notice it is going through bumpers.

Because we haven't fully set up the enemy yet with colliders and that sorta thing.

So the first thing that I'll do is I'll actually move the enemy

away from the player at the beginning of the game.

So let me just drag it over here.

Maybe I'll make it so

we can kind of just see it in the camera, right there on the edge.

So let's add a few additional components.

So we do need a rigid body because we want this to collide

with things like the bumpers.

So let's go ahead and add physics and add the rigid body.

Once again you can modify the mass and drag and so forth.

I'm just going to leave everything at the defaults for now.

I do want this to use gravity just like the player so

it will fall off the world just like the player will.

It's going to be affected by forces, so I will not check is kinematic.

So the other thing that I might wanna do is,

it already has a box collider on it, but there's no physical material.

I'm gonna go ahead and make this bouncy so the enemies kind of bounce off

the ground depending on how high they are when they originally appear in the world.

So right now if I once again zoom in on this,

it's pretty much right on the ground so let me move it up a little bit.

Once again, if I want to be precise, I could snap it or just go over and tag.

So I'll start at that two meters high and go ahead and try that.

So let's just hit play.

[MUSIC]

You can see now that it won't travel through bumpers,

so we can kind of block it, get away from it, but

the enemy isn't really doing any damage yet, it's just kinda getting in our way.

So just like with the death zone, we need to add a damage script on the enemy.

So let me go and say, Add Component > Scripts, pick Damage.

We can define the amount of damage.

I'm gonna just leave it at ten cuz I do want it to kill my player on contact.

Because ten's greater than one.

I don't have a trigger right now.

I could actually create a second collider on this, so

you could actually have multiple colliders.

So I could have one collider that's not a trigger and

bouncy, so it interacts with physics.

And then I could have a second collider that is a trigger

that would detect a trigger collision, but this script is actually set up to also

have the option of damage on collision, so I'll switch to damage on collision.

And the final thing that I wanna do is I wanna give the enemy health,

just like the player, because I want the enemies to die as well when maybe they run

into each other or when they fall off the world and run into the ground.

So let me add the component for health.

And once again, I’ll leave it with the defaults.

So let’s go ahead and play.

[MUSIC]

You can see the enemies come in pretty quickly, so

maybe I need to adjust their speed a little bit.

But once I get moving I am able to get away from it if I focus on that.

We have our enemy pretty well set up so let's make it into a pre-fab by dragging

the gameObject into our pre-fab folder to create an enemy pre-fab.

And let's go ahead and add two enemies to the world to start out with.

Once again, let's position it.

So I'm gonna make this maybe two meters high, and let's do a top down view.

And I'll position both of these guys to be kind of

at the far extremities of the world so

they don't attack me immediately before I have a chance to start moving.

And just like the coins,

it might be nice to have an empty game object to organize my enemies.

So I'll call this Enemies.

I'll set it back to the origin.

And then I'll drag my enemies into that empty gameObject.

So let's go ahead and try this.

[MUSIC]

So you can see the two enemies up there in the scene view are chasing me.

If I'm good enough, I could see if I can get them to run into each other.

Might be a little tricky to do that.

There.

They just destroyed each other.

>> 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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