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Hello there.

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In this video, we're going to make invincibility for the player so he cannot be knocked twice in a

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row.

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How are we going to do that?

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Let's go to player.

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We're going to create a routine.

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What is quarantine is pretty simple to understand.

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Basically, it allows you to do some actions with a delay.

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How do you create a quarantine?

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You just go, let's say here and you make it private, a enumerator, you give it a name and our will

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be I'm not sure if I can spell it in win ability.

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Let me see if I spelled that correctly.

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Okay.

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This is the correct word.

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Yeah.

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Now how do we use it?

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Very simple.

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If we want to make some delay, we just make yield return new wait four.

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And here we can choose what we want and we want wait 4 seconds.

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And in our case, final is just choose point 5 seconds.

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So what I'm going to do debug dot log in wins started or and I'll choose let's say 5 seconds.

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All right then here I'll make delay of the 5 seconds and then I'll do the log in wins over.

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Now let's see, how does it work?

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How do we run this coverage in?

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We need just to do very simple stuff.

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We can type, start or routine.

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Now we need a name or we can just type in the instability here and it will work.

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Let's see.

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And now it's in the action.

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I'm going to open my console hit play.

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We're going to see first message.

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Then after 5 seconds, we're going to see another message.

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In.

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We started for five.

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In wins over and we can use it just to control bowl and can be knocked, for example.

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Let's go and create this boolean private bool can be knocked.

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Oh, sorry.

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Then we go in here and instead of using debug we're going to do can be knocked equals false.

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Can be knocked.

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Equals true.

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Now we don't start quarantine from here.

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We started in the knockback, so once player was knocked, we do start routine invincibility.

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And just above that, we're going to say, if not can be knocked, then return.

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Yes.

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So it can be knocked as false.

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Then we return from this function and none of this will work.

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And I guess we need to set.

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Can we knock to true by default?

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Let's go above and do this.

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I forgot to do that.

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Sorry can be not true.

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Now let's go back to Unity and see if I can knock back myself five times in a row.

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I can do it once, but not again until time passes.

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But if I would say not use this quarantine, I'll commit it out.

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Let's see what's going to happen.

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I can knock myself over and over again.

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And if there is a couple of traps, we can trigger it twice.

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So that's not what we need.

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All right, so let's uncomment this.

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Now we have invincibility, but it's not really clear if player is invincible.

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There is no obvious sign of that.

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So I want to do that and I want to do that in the style of very old games, how it was before.

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I want to make our sprite blink in the time of invincibility.

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Let me find the player.

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I'm going to open his color.

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And there is an Alpha channel which makes it transparent if we want.

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Right?

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So what I want to do is basically affects like this.

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We're going to change Alpha to half of the alpha and then back to original every 0.1 second.

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And it's going to look like this.

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Got it.

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So we're going to get access to a Sprite renderer.

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Then we're going to get access to the color and we're going to change.

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It's alpha.

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Okay, let's go and do that.

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Let's go back to code.

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We're going to need component of Sprite, Renderer, Private Sprite.

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Right, Renderer.

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And we're going to name it as S.r.

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Then we're going to go to start and assign this component S.R equals to get component of Sprite renderer.

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Then let's find our core routine.

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And where is it?

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Over here.

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We're going to make two temp values.

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First will be color, original color, which will be equals to our lot.

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Color, color of our sprite renderer.

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And then we're going to make another color darken color, which will be equals to new color.

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And color has four channels red, green, blue and alpha.

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We're going to take red of the original sprite renderer as our color dot are.

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Same for G.

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Same for blue as our color blue and for the alpha is going to be 0.5 like that.

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Now here, we said can be knocked to false.

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Of course, then we're going to control the color, as are color equals to darken color.

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Then we're going to wait for, let's say, 0.1 F.

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Then we're going to make S.r.

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I'll make a space here, as are color equals to original color.

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Then wait again 4.1 second.

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And this How is going to work?

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It's our color.

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Dark in color.

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We need to think how long we want invincibility to be.

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So lets say if it will be our one second, we need to combine values to make one second in total.

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So as our color.

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I can just copy this.

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Copy.

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Based.

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Based.

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Based.

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How long it is.

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One, two, three, four, five, six, seven, eight.

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To more.

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Then we set the original color and we make can be knocked through again and I can delete this line of

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code.

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So now, when instability not only sets can be knocked, but also changes color every point.

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One second.

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Let's try this.

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Let's see how it feels.

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Boom.

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We're blinking and we know that we are under some effect.

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And after a couple of tries, player will understand what is happening here because it's pretty intuitive.

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I only don't like how it looks.

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It's blinking kind of too fast, so maybe we can make it slower in the end.

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Let's go back to code and do this one one, then 1.5, 1.5 and then point 25 point 20.25, then point

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three.

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And then the original color.

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And we can delete these.

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So now we have less steps, but they take more time.

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Let's go and see this.

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Yeah, this looks better.

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This looks more intuitive and understandable.

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Something can fast in the beginning and then it gets in slower.

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And I have a feeling when it's going to be stopped.

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If you want, you can add a couple of more steps and just copy this, paste it in and make it longer.

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So point three, 5.4 I guess is going to be bit more clear.

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Boom.

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Yeah, that's.

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That feels good.

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I'll keep this one.

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All right, That's it for this video.

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See you in the next one.