Original subtitles

Of course

We don't really have a game unless our sword ability can actually kill an enemy

So

Let's go ahead and do that

A couple of things that we need to do the first question that we need to answer it

How do we know where are the enemies are

In the

And the way that were going to do that as we're going to use a strategy similar

To Howie

The player position from the game camera

I'm going to add

The enemy

2 and 10

Is group

So let's go ahead and

Go into a basic enemy by clicking on

The icon from the main theme

And when I click on the route

I'm going to click on the

No

Dark

Tabs

Guiding click on

And then we're going to add

The

Anime to

Ok

So now anime is in the anime group

Let's go to our sword ability Now control shift to open

Quick opensea

Can you get your sword ability controller in open that up

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And then click the Script icon to open up the screen

So we're currently spawning a sword in

At the player

But we probably want to spoil the song

Instance

So how are we going to do that

We're going to get rid of this black here we're getting a fur

No dim repair where to change this to

Enemies is equal to

Get nodes

In

And then

Ok and then we're going to need to do a simple check here we're going to get rid of player lying here

And then I'm here we're going to say if enemies

Shot size

Is equal to 0 which means that we have no elements in the array does no enemies

The screen will just going to return out of that

So that we don't even try to spawn the sort of there's no

Ok now we're gonna get an error here and that's fine I'm just going to comment this out for now by hidden control

And then

Ok

So control cable automatically comment there was line so they don't

Take off

And there is one thing that we want to do with his enemies which is

We were

How to only get the enemy

Is that are within a certain distance of

The player

Because if there's an enemy that off screen we don't want the sword which is kind of like a melee ability

To be able to hear that

So let's declare a constant

Up here

Con

Max Rayne

I want to set it to something like

104

So there is a Max

Configurable if you want

By doing

At

Export

Bar

Mark

Range

You can do that if you want it to be configurable

My inspector

Right here

Music on speakers I don't foresee this variable needing to be changed

At all

So we're going to go back down to her on time or time out here

I'm going to say enemies

Is equal to enemies dot

So what we going to do is we're going to pass on

Filter mesh

So in the filter function

We can actually pass what is called

Filter function

Which is

A function that takes each element in the array

Argument

And can return either true or false

To decide

Whether that element should be preserved in the for

So you can imagine like a real life filter

You have it blacked out

Certain things so if you have a water filter

It let's all the waters there's a film

An

Prevents all the sediment from

So it's the same way with

Filter function with data

With an array

We can run a function against each element to the term

If that element should be filtered

Or not

And so in here what I'm going to do is it going to rain

Funk

And then parentheses enemy

We're going to specify this enemy is a type of no 2D

So that we can get suggestions

I'm going to call

Return

Anime

Global position

Distance squared

Tool

And we're going to check

The distance squared to the player

Position

Is

West Ham the maximum

Before we do that we're going to make this a little bit nicer by

Formatting as well babe

So if I go to my return key word here and I just press

Enter to create a new line

We can do that and then I need to move the end parentheses of you highlight Apprentice

It will show you where the matching printer

Underline underneath of parentheses

You can see that

Is underlined the

Opposing for a disease over here to begin

The filter

Funk

And so just before that one I'm going to hit enter again

Depressed

Tab to unintended

To preserve the proper in

And then here we still got an error but if we want to see if this works I can just take control care

To come in

Indent there's a couple of times

And then

Return

Solicitor very barebones filter function that will just feel throughout everything

So this Returns true

Element Andrew

Well described the elements so if we were the right like this we were filled out every single

I'm just going to keep it there for now just as demonstration purpose

We do need to

The player position

Again then

I'm gonna put that line back that we had before

Vera-playa equals get three dots

First

No dim

Claire

As note

Ok so back to our filter function I'm going to remove this hard couldn't fault here

I'm a presscontrol k on this line

To remove

The car

And then remember what we doing here is worth checking

If the distance

Square

2

The player

Is greater than

The match

Range

Or in this case we wanted to be less than the maximum sort Returns true

And preserve the

And again we're doing distance squared to because

Square calculation actually required

Fewer CPU Cycles compared

Atypical

Square root operation

And so when you're dealing with large list

This was actually

Match

So distance squared to

What can I put in as the argument there

Player

Dot global position

And then we're going to say is last

How

Max range

2

So when you do a Distance squared to check

This is going to get the squared

From the enemy to the player

That means that the Range that were checking also

To be square

So instead of using

Match range we have to use mate

Change x Max

Squared

So again this will filter out

Every Anna

That is further than

150 pixels away

From the player

And we're signing it here

Right enemies is equal to enemies that filter

Because this filter function

If I bring up my documentation

By clicking F1

On my keep

If I look

Theory test

And click

I can scroll down

And find

Motor function

And you can see that the return type

Is listed

Arsenal left of the filter

So it's going to return a new array

So and you can read the documentation as well

Which will tell you here

It returns a new array

So again the documentation is always there if you're confused about anything that I'm going over

Please feel free

Pause the video

Open up the door

Station

And just do a little bit of Reading if something I'm saying is

But moving on

2

The rest of this

So now we've got our filter Denham

All the animals are close enough to the play

To be able to use the sword ability

I'm sorry we're going to want to put that cheque back into

So

Where is equal then now

So can't be too

Ok so now we've got Oliver check down in Oliver

Setup done

Now we actually want to take

Closest enemy in attack on that

So I want to do is wee wee

Call enemies

Darts

Cus

And in here within a provide a sorting function

Which is

Funk

No to die

Karma

For a second

B

Colin no to do so again

Or typing elements

And then a cold

The end of that

But hit return and then unindent

So that way with God are formatted correctly

And just a quick note about the Sorting function so the way that sorting works across a Friday

Languages is Dad new passing a function

That Compares element 88 helmet

So it gives you

Pairs at a time

And you as the developer

To tell

Weather

It should be sorted before

B and

Works the same way in Jesus Christ

We've got our a enemy and our

B&M

And we're going to grab the Disco

To the player for each of those enemies

And then return true

If a is closer because we want a to be sorted

First is this is unclear what you can do is again open up your documentation with f

You can actually

Bye

The method name that you're having trouble

Type

Sort custom here

That brings me right to the erase awesome and I can click into that

And this will give me a lot of useful information

How does sorting actually work

Any point doing this you're unsure of the exact behaviour of a function that were using the overall pass

Video open up the documentation in read

What

Function

Does

So we need to grab the a Distance so a underscore distance

Is equal to

A global position

Where can you use distance squared to again for the same reason that we did above

Inside edition

Squared to the player global

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I'm just going to keep that

Unless duplicate this line solutions copy and paste

I'm going to change this

Be distance

And be very short to change this to be Da Club up

I know we're just going to return a distance

Is less than

So again if this

Sorting function Returns true that means that a should be sorted

Before

B

Andover minor type of here this needs to be 2D

Capitalise

What is fixed

So now we got a sorted Enemy Away

And we already know that the enemy size is greater than 0

So

Replace this comment out line

So player get parent and Child

Ring keep this line actually because we're going to tell the sword to go into the tree somewhere for keeping this line to add child

What we're going to change is the global positions what's on comment that line as well

Instead of playing at global position

What we're going to do is ringing to say enemies

At index 0

So the first enemy

In the sorted array

Will be the closest anime

And it will be a

That

So let's go and test this but first let's go back to our main scene

And click on the 2D

Set the top to go bye

2 hour

Scene view

And I'm just going to go ahead and duplicate this enemy by selecting it and pressing ctrl d

And I've got a second-hand

I'm going to hit w

To enable the move tool

Then I'm going to move that second enemy

Fire away

So let's go ahead and play

I can see that the sword is always attacking this rat first

Because that's the closest one now if I switch directions

Responding on that one

Now that we've got the sword tiling the proper anime

Wheel cover

How to actually make the sword kill the enemy in the next lesson