All language subtitles for lesson095

Do the first thing you need to think about whenever you create a new game on

About the jump into changing a gameobject with a script on his case we can I change the health bar with

With a script

First thing you need to think about it

Who needs a reference to this

Who's going to be changing this

Well

We had a reference to coins

In the player script

The new player script double click on their script

But we get the coins text

UI

Referenced here

So when I had a similar reference to the image component

So we can do is just type public

Image

Elf bar

And we can technical go into the start function here

Type health bar

Subtitled by
-♪ online-courses.club ♪-
We compress knowledge for you!
https://t.me/joinchat/ailxpXoW3JVjYzQ1

Equals game object

Define what the name is the name is health bar with a space

Dad

Member

Because it's an image

Variable type

Winner deals getcomponent

Image again weird syntax year

But now it's going to find

Health bar game object

And then get the

Now we can actually adjust

Health bar

Another way of doing this is just to get rid of her entirely

Because there's only one player in the game

We just say hey player

How far

Is this

Dragon on a without of the

Now here's a thing

Weekly dinner health bar

What we just referenced was the image component

Well the image component

Doesn't actually have anything to do with whip

So why are we getting the image component

In that the rect transform

The reason why is because you can actually access the recttransform

Simply by having any other reference to a component

Ethical thing about recttransform in transformed bellies

So what we can do is actually just go like this

Update you I'll say I don't know the update function here in the new player script in Russia's rights

Code I just say what's your test here said health bar

With

2

100

The way that we do there is health bar that wrecked transferred is recttransform

I know this is a little confusing

But there is certain components

That come out of the box with unity

You can just reference whenever you want to

So even though health bar

Does an actually have a variable called recttransform

What is means if we're just going hey find something called recttransform

In that game are checked

Now that we have the recttransform value

We can actually just like that

And it's not actually with your height or even size

Kind of weird with red Transformers actually size Delta

Then you going to say equals

New

Vector

2

Yeah I just said it to you 100 and then

Whatever it's current y valuers or height

So again health bar that recttransform

And I just close down

With a semicolon

Richard set

How far to 100 units wide

So in theory it should end up looking like that

The moment we collect a coin

And this is just a test to see if work setting the width properly so it's a play and see if that happens

Here we go

Alright so now we know how to change the actual width of a bar

We're getting write an equation

So I know one thing

I know we need an original size

Brother health bar

We don't know how big

The bar is

When we start the game

Create a variable is going to be private because we're not really going to need to see it and the inspector and we definitely don't need a

From any other script in the game

Private private

Vector2

Health bar original size

What's this by default we created the variable but by the fault it's just

00009 why or

0 in width and 0 in the height

So we need to make sure that we find out what that original size is

So what we're going to do is going to say

Health bar or Ridge size = the health Bar number that's the image

Variable APR

Dart recttransform size Delta

The health bar original size this variable

Is matching

Finding out with the size delta of the red Transformers

So just so we can see it in the Inspector was just serializability quick

Remove this after we know for sure

How much is go ahead hip play and make sure

We can see what the health bar orig sizes

Ok so we're just updated because we put it in the start function so right when we started

It matched the value

816 in width and 29 in height

Where is perfect it's magic

Cinematic how small I make this

Pronounce 263

When we go to iPlayer on new player skript here when we got a new player script here by selecting player

The nearest that is still 816

That's because it's found the original value when we were in the start function

Mama hit play at SoundAbout value

But now

It's still has their value so it's remembering what the original value was

Now we can find out the proportion

Based on its original size to right now it's almost maybe 30%

Aboriginal

The way that you calculate that

Is simply buy some Division so have you learnt this in high school maybe you're learning this right now in high school or college

Have you forgotten all about this stuff and that's definitely ok we're going to do a little bit of a refresher here

So basically to find the proportion or the percentage

Original value

You just divide so if we write some pseudocode here we go health bar that recttransform

That size Delta

X /

The original value

What is that that's health bar

Norwich

Size

X

What's go ahead in just for a quick maths refresher

ASDA Bangor sell

Debug.log

This actually

Into the debug window

Tell we can write a Little Liars train here

Health bar percentage is

Whenever this number is so it's

Print

With

÷ the original with

The Crown which is 100

The original it was 100

What are percentage

Well this is gonna give us a decimal not a percentage but we can jump in unity and take a look at it play here

Collect something

Alright so looks like the health bar percentage is .12

What does that mean that swell 12%

Number with percentages you just need a x x 100

And I should give us an accurate

Percentage

So currently it's 12% of its original value

That's perfect so that's going to be using

When scaling is health bar

So now we have a general understanding of not only how to change the size or the width

The health bar

We also have a general understanding of how percentages work and how we can find out what the percentage of the health bar is

I'm just going to go ahead and comment all this out for now

To our going to do is actually just going to the collectible script

And we need to start setting some conditions

Michael Dunn appear

Do certain things to various variables

So I know that if it's a coin

I want to add

To the coins collected variable

And I know that it is a health

Item type

I want to add

To another line Sonu player health

Classical or mine is equals what in this case it can be plus equals

Ok

Well

We want to add to a coins in their health

Or let's say a coin collectible type

We actually need to make these conditions

Turn down here

Go ahead and comment out all of these conditions here that We Created earlier and we're just going to come in the mail

Because we actually can just copy and paste them

Copy all of this we don't really need it in our start function

That was just for a tutorial now actually going to put it inside of the ontriggerenter so weird paste all

And we have I'm a coin here

Remove all this debug stuff don't need this anymore that was just for the tutorial now actually making

Subtitled by
-♪ online-courses.club ♪-
We compress knowledge for you!
https://t.me/joinchat/ailxpXoW3JVjYzQ1

So this is if I'm a coin then we want to add

Health

Bad health

NN regardless no matter who I am

I still want to update the UI

Just to get the

Variables to match the actual UI elements

And then just destroy the game object

Destroy the coin or the health object

Don't say that out

And let's see hear back in the Unity

So I know that I don't want to spend too much time creating graphics for health

So she just take this coin here

Call this

Health

Let's make it a bright red

There we go there some healthier for us

A little bit pink

And

What I want to do is actually just drag this to a prefabs

Right there

Creating original prefab

So now we have a health item

In a coin item

Well is this actually going to be havenshealth

Not yet let's go hen

Johnny dough's

And how we have this collectible pony here on her health game object

Let's be sure we said it to health

Alright so if we go back into your script here

You can see here that it says if I am type is coin flip the coin

If item type is health

Well I didn't type is said to help

Therefore it should increase our health value

So nothing's going to happen to our national health bar

Just yet

All that's going to happen is going to add some health

It's going to play

Take a look at our health value here

100 if I collect this

But now it's 101

Well

We really don't want to go over 101 do we

So what we're going to do is just create a simple condition inside of the condition we've only written here

Wheeler Dealers just go if

New player

Health is smaller than a value of 100

Then

Working as an elf

That's great

The now

Go back into unity sofa health is currently 100

Play

We should be able to collect the health

But it's not actually an increase the value

Pretty much Max Tell right

So let's go ahead and set our health by default

250 just for testing purposes

In here play

Now it's 51

Awesome that's perfect

So now that we've actually got the ability to collect these red orbs to get health

Now I want to make it actually reflected

In the percentages

Are the health bars with

Hi so our health

Variable

My actual player

Is it raining right we like to help and it goes up by 1 so from 50 to 51

Nothing happening with the actual

Health bar UI so we need to make that reflective of the actual value

Well you remember we have a function inside of a new player called update UI

The update UI is basically just going to say hey what's the coins value what's the health value what's RAM

Are you going to check for all these things every time you collect something and it's going to try and reflect it in the UI

So what's writing pseudocode here to help us better understand how I'm going to write this equation

Basically wanted to set

The health bar

With

To a percentage

Of its original value

Ok so we're going to do this is something like see here we need a multiplier

We need a x

The original health bar with

Do something like health bar Dad x x x a percentage of a value

Going to be x x something like .45 something like that so it shrinks down to half of its size

How we get that value

What's the apprentices here in try and figure out what this would be

Well it's going to be my current health

/ my Max health

Ok

So what is my maximum health value

When I actually have something like that

Swansea this what's a private integer

Call Max health

Let's make our maxhealth 100 ok

Our health is currently 100 as well that's ok

So now health / Max health is going to be some kind of a decimals of my health is it 50

50 / Max health is 50% or .5

So health bar that x x x 50%

Should kind of do the trick right

Well not exactly

Actually needs to be the original value to health bar or rage

Dad x

So what's the original size what was the original size of the health bar then we're going x x at present

So how do we write this in actual code

It would be something like health bar

Dad

Transform

Recttransform Meadows

Size Delta

Equals

New vector2

Ok here is where we do that equation

Health bar rage size.xl

X x printezis health /

Max health

I know this is confusing

And it seems like I'm smart and I know exactly what I'm doing here

But I actually had it sorted take a breather and puzzle little bit while doing this tutorial evening

Really think about what is equation is

Ok so we've got some squiggly lines looks like we're not actually

That's right we need to put a y value in here what's the weather you that's the height we want it to be identical

Just help bar directions form delta 0.1

Semicolon

So why on earth is this equation

Let's just break it down as simple as we can guys

So was setting the size of our health bar

That's called size Delta

And that is a variable of the recttransform component

We're going to set that to a new vector to

Who is X and Y or in this case with or height

Premier Inn why perimeter ok

What about the experiment are really quick

This is the actual whip

So we're going to set the width to be the original size

Times that percentage

Bet calculator

From my current health

÷ maxhealth

Search my credit is 50

100

That's .5

So it's the original size of the bar

In the wet

X x 0.5

Why you here is the height

When are we doing you're saying don't change it keep it exactly what it is

How far Direct transform that size delta that's why

So nothing is going to be tweet here

Ok so I think they will do it let's test this year

Go hip playing see what happens

Nothing should happen with a health bar yet

Currently with our current script is if we collect a health item so that's right

Oh my goodness

So it is 0 or 21 take a look

Exactly 0

Let's try and diagnose why that happened

Going to happen all out with you guys when you're making your game

White just happened

To my line of code

So I talked about debugging

These kinds of errors

OK well let's go ahead in remove all of this comment stuff we don't need that

Let's go ahead in figure out what is going on here some of you might actually see exactly

Going on in if you do bravo to you

But I'm going to go step-by-step in figure out what's going on here

Well what are health borough Ridge size

What is the current value

Let's go home hip play and make sure we get that value correct when I want to do is go through each portion of my

To make sure everything is the correct value

Securly it's 8:16

Ok

Let's see here

So that's 816

X

Times our health

Which is 50

÷ or Max health

1 x 100

Just go ahead and do a little bit of a debug.log

Health

Percentage

Is

Plus animals copy

Is value here

Ok so we're going to find out what the health percentage is

What's going on here play

0

I think I know what's going on

What we need to do

I'm actually glad it happened because I need to tell you about

Define dividing one integer

Another integer

It's going to output 0

And the reason why is because

These are floats these are integers

How we convert them to a float

Actually I got to do is just type float in front of One

Inflow in front of another integer so now they seem to do is say what's the healthy to do

Convert that to a float

What's the max out integer into a float

Enniskillen divider 2

So let's see if he bugs

The proper calculation

Awesome OK now it's .51 time to do is go back in the net script here and just had the

Float / float

Then we can delete the debug here

And it should

Set our health bar

To be about 51%

Original value

Artem ok sorry how far is adjusting properly

The other thing we got to do is your guys as well when we have play

You notice that a health is 50 here

The Mark self is 100 but why is the bar none A50 it should be that way the moment

Start the game

Well

You probably thought of it before I did are we going to do is make this update UI

Cabin

In the start function as well

So what you going to do it right here update you why

So the moment that unity starts the game then we hit play

It's going to burst

Variables

And just like a speed reader he's going to jump to The Voice start here

Restarting my game

I need to first set the health bar original size variable to match the health bar

And then I'm going to go ahead and update my uy meaning I'm going to take a look at all these calculations here

Make the appropriate adjustments

That's it saving

Tiny unity

How far

The moment we have play the moment the death start function fires

Is it raining down

Perfect awesome

I love it and you can see it to iterate it there so let's go ahead in ads and health

To the game

Sad one here

Maybe some in the sky right here

Periods and healthy and here

Is always really fine and collectables collectables and just going to make your game so fun and we make a little

Play two player on a jump in that direction

Really really cold here so let's go ahead in

Play

Awesome

Well it looks like the health bar

Isn't updating and that's a little strange will take a look and see what's going on

For some reason

Those prefabs that we just added are not adding health to the player

Why is that

I see

Looks like this is a great example

I've just double checking your prefabs

Looks like if we double click on her health prefab

It looks like the item type wasn't set correctly for a health prefab

Let's be sure we said that to health

Go back to the scene

Just double checking m Oliver health

Ok so the item type is set correctly

How much is drag these

Angela one as well

Just having organised

Now when we have play

You can scale up a game window just a little bit to see the iteration of the health bar

Alright good it's going outputs go

Over here

Good ass

Slowly iterating

What's your notice better coins are no longer updating now

What is going on with ticklish here it's go back in your script in

Are you out this bug as well

I'm keeping these bags in this tutorial guys because I want you guys to understand slowly

How to fix bugs

So if you're going or collectible script here if item type is coin or going to add Torpoint

And then we're going to update the UI

Update UI function

Looks like that's probably set up so let's go ahead and jump into unity

BBC what's going on it's like one of these coins here I'll take a scripture ok

Hurricanes

Oh my goodness

Item type is it the ML I have no idea why they happened but that's ok that's why we use

Prefabs

Double click on a coin prefab

In a project folder

Change the item type 2 coin

Now it's a van hopefully everything is updating accordingly

Health

The coin

Yeah ok

Item types are working fine

Perfect

Awesome

There's a quick recap guys

Your variables

For health and ammo

Coins

All that stuff it's not stored in the UI DUI is simply reflect

The variables

Data stored somewhere else

In this case for storing those variables in a

Assistant script that means a script that's going to be running throughout the entire game

In our case it's the new player this player is always going to be in the game so were storing

Inventory variables like health my coins collected

Does are all stored in the Script

In the UI elements

Reflects those

Using a simple function called update UI

We fire this function or call this function

From other scripts so we can call that function from the collectible script and see it's been cold here

Or if we had an enemy scripting when the enemy hit the player

In the health decreased

You just buy that functions again

That's why we have a single function called update by inside of one

Class and that's the new player class

Because I want to give a fire that from all kinds of other script a collectible script

An enemy script maybe a boss script

Maybe there's some traps in the game that can hurt you

Or maybe there's some characters in the game that will give you 3000 coins

No matter what or who is changing the variables of your inventory

All we got to do is just updating you are

With this simple coming and here new player that update UI

And it's always going to go back to this function here

Check the variables check your inventory

And then update the UI accordingly

So that is how you I generally works and games you have one big function here that can update the UI

Based on your inventory so that a ton about the classes can use that single function

Instead of writing of that function inside of every single class

That wants to update the UI

This doesn't make sense don't worry these kind of principles that can be used over and over and over and kind of research

As we work through this tutorial to create our 2D game