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Welcome back my fellow game developers to a brand new extremely long video.

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I know you're sick of that.

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But as always, it's extremely worth it because we learn so much.

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First of all, we create an enemy.

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We add a range to it.

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We add a way to draw that range.

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And we also run the game. We can shoot the enemy.

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Obviously he doesn't die for now,

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but we can get into the range.

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You can see right here the player is in Chase range.

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It's being sent every single time.

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If we get out of this little bubble, there you go,

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you see that the player is out of range.

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So let's not waste any more time.

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And let's get started with this long video.

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Oh, so it's time for some enemies.

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Let's get started.

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The first thing that we're going to do is we're going

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to right-click create an empty game object.

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Make sure that its position is reset.

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And the rotation and scale and et cetera.

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And we'll just call this the enemy for now until we decide which enemy will want to use.

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Next thing we'll need to do is we'll need to go into the sprites.

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We're going to right-click create a folder in here for the enemies.

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And inside of the enemies will go into the resources and

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we are going to drag in the monster and creatures.

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And let's just put it in here.

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So we'll wait for everything to import. We'll open this up.

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And as you can see, we have four types of enemies

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that I've downloaded from open game arts.

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Of course, as always,

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you can go find your own enemies.

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These are the ones that I've used and they will be in the link, in the resources.

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And what should I choose?

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I think I'm going to choose four now,

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the, let's see which one.

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I really haven't thought about this.

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The enemies.

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Let's just choose the skeleton and be very generic.

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So as you can see, we have attack three death either et cetera, et cetera.

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So I'm just going to go into the idle.

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I'm going to make it multiple Sprite Editor apply.

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And let's go ahead and slice it up,

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not automatically, but by a grid size.

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And if you were a bit confused by what I did last time,

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I just check the length of the entire sprite.

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So it's 600 and I divide it by how many skeletons we have.

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So we have four or one single row,

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so divided by four.

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That means it's 150 by 150, as always.

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For some reason, I'm surprised.

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So we go into the splice, slice.

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Splice, think that's movie splice, sure, slice.

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There we go. Apply.

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Now we have our little skeletons right here.

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I'm going to drag it.

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And the scene, whoa,

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that's a huge skeleton, isn't it?

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That's irony.

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If you haven't picked it up.

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Anyways, we'll make it 50. There we go.

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We still can't see him because we need to have and apply.

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Let's go ahead and create a layer in here which will be the enemy or enemies.

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And I'm going set the bullets to render in front of

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the enemy and also the player to render a plot of the enemy.

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And let's go ahead and set the enemy right here.

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So there you go.

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It's still a very small enemy.

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Let's save that. Let's make him a bit bigger.

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So an idle 50, Let's make them 32.

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Apply that.

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Maybe even bigger.

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Let's make him 16. So 16.

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Yep. There we go.

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Okay.

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That's too big.

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When D maybe 20.

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Yeah, I think 20 is good enough.

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That's changed this two points. See if that helps.

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Yep, there we go. He looks a lot better,

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still a bit grainy,

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but no worries about that.

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We have him for free.

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Anyways.

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Let's see, this is the body.

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This would be the body.

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And I'm going to child it to the enemy game object.

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So now we have the enemy right here and the body.

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Let's just set him to 00.

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The position is relative,

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of course to the enemy game objects or now we move around

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using the enemy and you can see that he is rendered behind the player,

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behind the gun and he should be also rendered behind the bullets. Go right.

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Now that we have this,

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next thing we need to do is obviously at

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some behavior or a way to control the behavior of our enemy.

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So we're going to go into the assets, the scripts,

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we're going to right-click in here,

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create a new folder maybe,

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and let's call it the enemies.

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Enter.

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Maybe also create one in here for the player,

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which will be the player controller.

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And let's see, we'll also create one for the bullets and time now.

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So create a new folder for the bullets.

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And we are going to move these into the bullet.

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Why?

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Because we have the bullet,

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the player bullet controller and the impact effect.

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So and inside of the enemies will right-click,

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create a new C Sharp script,

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and we'll call it the

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And EMI controller hit Enter.

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Wait for this to compile. Okay, great.

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And now in the enemy,

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we can go ahead and add a component which is the enemy controller.

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And we're going to open up the script.

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Okay? So something you might have noticed that all the tabs are gone.

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That's not because I closed them,

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That's because we've changed the directory of them.

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So we moved, for example,

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the player controller from the folder scripts into the folder player scripts.

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That's why we don't have it,

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but don't worry, it's still,

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if we double-click, we can easily open it up.

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Let's continue on.

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What do we need in here inside of the NMI controller?

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While we need, first of all,

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a variable that will keep in check the enemies speed.

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And we will need a variable which will represent the enemies rigid body.

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So I'm going to do just that.

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These are very simple things.

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No need for a lot of explanation.

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This is a serialized field,

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a float, and the enemy speed.

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And another variable which will be a private rigid body 2D.

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And I just remembered.

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And EMI, rigid body.

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The body doesn't need to be capital.

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Save that.

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And I just remember that we forgot obviously to

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add a couple of things to the enemy, which is here.

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We are going to add a component which will be a box collider.

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And let's go ahead and make it.

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So maybe without the shield,

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usually it's better to keep the box colliders a bit smaller than the actual body.

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This will make the player of your game wanted to become more accurate.

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And we can also add the shadow, by the way,

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under the enemy, which is a fairly good idea.

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I'm going to add another component,

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which will be the rigid body 2D.

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Obviously we are going to make the gravity scale 0.

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Save that, and we'll close both,

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both of these down.

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Move the script under the two components,

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or we can just leave it there.

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What's the speed of the enemy?

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What's the speed of the player first, okay,

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It's then, let's make the enemy speed 5.5 of that.

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Save that. Okay, great.

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So now we have the enemy.

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We have a rigid body and a collider on him

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so we can shoot him and interact with him physically.

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Now what you want to do is we want to start moving the enemy towards the player,

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but not all the time,

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only when the player gets close enough.

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So we need a variable for the range at

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which the player will be at an order for the enemy to stop chasing him.

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And we also need the direction in which the enemy will be moving.

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So first thing first,

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we're going to create a serialized field,

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which will be a float with the player or the player chase range,

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let's call it the player chains range.

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So the range which the player should be to start chasing him.

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And we'll create a private factor three.

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And this will be the direction to move in the direction to move and save that.

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Okay, great.

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Let's go back in here.

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And what's the chase range? And you know what?

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Let's keep it for later on.

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And I'll show you a very nifty way of how we can draw.

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So how are we going to know what the chase ranges?

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So I can, for example,

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start making the change range five or ten, or 21.

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But what does it mean?

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What does it mean the chase range in here.

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So do we have to every time calculate these little boxes

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in here to determine how far or close declare is.

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Well, of course not.

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What we're going to do is we're going to draw

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a circle in here that will only appear in the scene mode,

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but not inside of the game mode.

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How are we going to do this?

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If we go back and here we have something called the draw gizmos.

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And you can find that in the Unity documentation.

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And the here we go,

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you can see that we have something under the mono behavior,

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which is onDraw gizmo select.

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And you can see right here implement the onDraw gets selected to

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draw gizmo object is selected.

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Notice what we said, if the object is selected and you can see right here,

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we have the gizmos test and how we can use it.

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So we create a void onDraw gizmo.

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And in here we can create the gizmo color so we select which color we want to be drawn.

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And what do we want to draw,

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which is the sphere.

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So we can click on the troposphere and we can see it right here,

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which is the public draws fear,

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draws a solid sphere with center and a radius.

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So let's implement this.

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And use it to draw our own circle or sphere around the enemy and know the range of it.

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And if we look closely at the method and here we can see that draws fear,

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we need a center and we need a radius.

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So what should the radius be?

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Think about it while we create this method.

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So in here, we're going to say on draw gizmos selected.

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And we are first of all going to choose a color.

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So it's going to be the gizmos dot color

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and it's going to be equal to the color, let's say red.

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Save that.

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Next we are going to access the gizmos dot Draw wire, sphere.

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So why are sphere look at that draws a wireframe sphere with a center and the radius.

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So it's a bit different than the sphere,

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but because we are playing in 2D,

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we don't need to draw the entire sphere,

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we just need the wire around it.

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And let's see what should be the center.

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The center obviously should be the transform dot positions or

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transport is the transport of the object which has the enemy controller.

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I know I've said it a million times,

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but for those of you that are still confused,

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I know that I was a bit confused when I when I started doing

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this a couple of years ago, a lot of years ago.

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And I remember, so where does this come from?

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Well, it's the transform of the object that has the enemy controller on it,

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which means it's this one, V enemy.

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This is the transformer talking about back in here.

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What is the radius?

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Well, have you thought about it?

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What should be the radius?

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Obviously, it's the player chase range.

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We are going to save that.

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We are going to go back into Unity.

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And well, whereas the circle you might be asking, well,

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if you remember a couple of videos ago we turned off the gizmos.

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Maybe you already saw it,

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you didn't notice, but if we click it, there we go.

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And why did we turn it off?

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Because we had this camera and annoying icon of the camera.

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What we can do is we can open the gizmos.

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You can see that we can deselect a lot of things in here,

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but one of the most important ones is we can make these icons are a bit smaller.

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So there you go.

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We no longer see the annoying camera go, correct?

255
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So look at that big, huge circle.

256
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Let's make it a bit smaller.

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And you can see that it immediately changes.

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I'm going to make it yea big.

259
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I'm going to set the player there.

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And the next thing that we need to do is we need to calculate the distance

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between the player and the enemy and see if it's less than the range.

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If it's less, we can start chasing the player.

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If it's not less than,

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we do not chase the player.

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So what's the first step to do?

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Well, we have the range,

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we have the transform position of the enemy.

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The next thing we need is a reference to the player.

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How are we going to get the reference of the player?

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Well, we first of all need to understand a method that I'm going to show you,

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which is the object dot find objects of type.

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And what this does,

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the object t means that it depends on what the object you are looking for.

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So when you find the object,

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d becomes that type of object.

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So the object, the first act of loaded object that matches the specific type.

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So it returns the first loaded object of the type types or you can give it your type.

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And if we look here,

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we can see a couple of examples.

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So let's say we want to find the Canvas renderer.

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If you don't know what the Canvas renderer is,

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don't worry, we will look into it later on.

283
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But for now, look the Canvas renderer.

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We create a canvas renderer pipe variable with the name Canvas,

285
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and we use finite object of type and we get the canvas render.

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So now we get a reference to it.

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And because we only have one player,

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we can use this.

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If we had multiple players,

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we couldn't have because,

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well, obviously we find only the first act of one.

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So look this method up,

293
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find it, study it, understand it.

294
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And then you will have to do this challenge.

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You'll need to find the player object.

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So create a variable of type transformed to represent the player we want to

297
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chase and start use find objects of type 2, find the player.

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The type should be the player controller.

299
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Why? Because we need to find some specific type of the player.

300
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So how do we identify the player?

301
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He's just like all the other objects.

302
00:15:51,424 --> 00:15:52,824
What makes him unique?

303
00:15:52,820 --> 00:15:57,260
It's not just the name you can find through the name or the body or the on.

304
00:15:57,260 --> 00:15:59,520
We need to use something specific.

305
00:15:59,524 --> 00:16:03,354
And that's something specific is the player controller script.

306
00:16:03,350 --> 00:16:09,920
That's why the type of the object you want to find is the player controller.

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00:16:09,920 --> 00:16:13,780
And finally use dot transform on the object you find and

308
00:16:13,775 --> 00:16:17,975
assign it to the variable we've created, y dot transform.

309
00:16:17,975 --> 00:16:22,435
You should know this because the type that we are going to create is the transform.

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Why is it transform?

311
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Well, because we want to get the distance.

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How do we get the distance?

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Well, obviously because it's a transform.

314
00:16:29,270 --> 00:16:31,310
So pause the video right now.

315
00:16:31,310 --> 00:16:34,200
Go do the challenge.

316
00:16:34,210 --> 00:16:37,220
Okay, so first thing, first,

317
00:16:37,220 --> 00:16:45,430
we are going to create a private transform and the player to chase.

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00:16:45,434 --> 00:16:47,684
Now inside of start,

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00:16:47,680 --> 00:16:56,160
we are going to say that the player to chase is equal to find objects of type.

320
00:16:56,155 --> 00:17:00,615
And the type that we are looking for is the player controller.

321
00:17:00,610 --> 00:17:04,990
And when we do find him because declared of two Chase as a transform,

322
00:17:04,990 --> 00:17:09,340
we're just going to access the transform immediately from me.

323
00:17:09,340 --> 00:17:11,100
So I hope you did the challenge.

324
00:17:11,095 --> 00:17:12,795
I hope it wasn't too hard.

325
00:17:12,790 --> 00:17:15,190
I know there was a bit of tricks in here,

326
00:17:15,190 --> 00:17:18,640
even though it's the first time you use find object of type,

327
00:17:18,640 --> 00:17:21,480
I'm sure that you were at least capable

328
00:17:21,475 --> 00:17:24,805
of doing this part if you couldn't have figured out this,

329
00:17:24,805 --> 00:17:29,525
don't worry about it was due time, will understand everything.

330
00:17:29,525 --> 00:17:35,195
But now, the next step is to go ahead and calculate the distance.

331
00:17:35,195 --> 00:17:39,265
So I'm going to create first of all, an if statement.

332
00:17:39,260 --> 00:17:43,250
And then I'm going to write vector 3 dot.

333
00:17:43,249 --> 00:17:46,549
And you can see that we have a method in here which is the distance and

334
00:17:46,550 --> 00:17:50,110
it returns the distance between a and B.

335
00:17:50,105 --> 00:17:52,615
So we're going to open this up.

336
00:17:52,610 --> 00:17:54,050
What is the a?

337
00:17:54,050 --> 00:17:59,750
It's going to be the transform dot position. And what is the B?

338
00:17:59,750 --> 00:18:03,960
It's going to be the player to chase dot position.

339
00:18:03,964 --> 00:18:05,154
There you go.

340
00:18:05,150 --> 00:18:10,060
And what is the condition if the distance between the transformed position,

341
00:18:10,055 --> 00:18:12,325
which is the enemy and the player to chase,

342
00:18:12,320 --> 00:18:18,520
which is the player and it's less than V player chase range.

343
00:18:18,515 --> 00:18:22,235
Then we are going to be moving our enemy.

344
00:18:22,235 --> 00:18:24,205
But that is for another video.

345
00:18:24,200 --> 00:18:27,710
For now, I'm just going to use the debug dot log.

346
00:18:27,710 --> 00:18:34,600
And I'm going to say player is in Chase range.

347
00:18:34,604 --> 00:18:41,894
And an else statement which we'll say that duplicate this line, move it down.

348
00:18:41,890 --> 00:18:44,160
And it's going to say,

349
00:18:44,155 --> 00:18:52,515
player out of Chase is out of chase range.

350
00:18:52,510 --> 00:18:56,000
Save that back in our game.

351
00:18:57,960 --> 00:19:02,640
Let's know what I just want to make something.

352
00:19:02,635 --> 00:19:05,475
I'll make this public just for now,

353
00:19:05,470 --> 00:19:07,870
just so we can see what happens.

354
00:19:07,870 --> 00:19:10,600
So you'll notice that on the enemy right

355
00:19:10,600 --> 00:19:13,440
now we have a player to chase, but there is nothing.

356
00:19:13,435 --> 00:19:15,435
We are not going to add anything.

357
00:19:15,430 --> 00:19:18,280
We're just going to run the game. There you go.

358
00:19:18,275 --> 00:19:21,085
You can see that now the doom player, if I click on it,

359
00:19:21,080 --> 00:19:23,440
there is the reference and now the skeleton,

360
00:19:23,435 --> 00:19:26,395
our enemy has a reference to the player.

361
00:19:26,390 --> 00:19:27,770
I can even shoot him.

362
00:19:27,770 --> 00:19:29,870
So I'm going to go into the console.

363
00:19:29,870 --> 00:19:31,550
What is this false?

364
00:19:31,550 --> 00:19:32,360
Let's double-click.

365
00:19:32,360 --> 00:19:36,620
Okay, So this one and player is out of chase range.

366
00:19:36,620 --> 00:19:38,890
Let me set the game window next to

367
00:19:38,885 --> 00:19:43,165
the scene when those so we can see clearly the circle in here.

368
00:19:43,160 --> 00:19:46,100
So if I come close enough,

369
00:19:46,100 --> 00:19:50,350
There we go, you can see that now player is in Chase range.

370
00:19:50,345 --> 00:19:53,575
If I go out, player is out of range.

371
00:19:53,570 --> 00:19:56,530
If I go and play as NJ strange,

372
00:19:56,525 --> 00:19:59,585
there you go, everything is working perfectly fine.

373
00:19:59,585 --> 00:20:01,045
So I hope you enjoy it.

374
00:20:01,040 --> 00:20:04,120
And the next video will be actually moving our enemy,

375
00:20:04,115 --> 00:20:06,745
not just printing something to the debug, to the log.

376
00:20:06,740 --> 00:20:08,740
Let me remove this debug dot log.

377
00:20:08,735 --> 00:20:09,505
Save that.

378
00:20:09,500 --> 00:20:13,120
Let me make this private again because we don't need to see it.

379
00:20:13,115 --> 00:20:14,755
I just wanted to demonstrate.

380
00:20:14,750 --> 00:20:17,620
Don't forget to stage all your files.

381
00:20:17,615 --> 00:20:19,735
And before I go,

382
00:20:19,730 --> 00:20:21,860
What did I also want to tell you all.

383
00:20:21,860 --> 00:20:22,990
I hope you enjoy it.

384
00:20:22,985 --> 00:20:24,695
See you next time.