WEBVTT

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Welcome back.

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So now we have our fire blast ability.

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Now we don't start with it by default.

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For that reason I'm going to add it to my start up abilities just to make this easy to test.

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So I'm going to go to class defaults and I'm going to give it a startup input tag.

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And that's going to be two.

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And now we should be able to start with it.

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If we go into blueprints character or a BP or a character, and I can search here in the details panel

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for abilities.

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And we have our startup abilities.

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Array.

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So I'm going to add to startup abilities.

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I'm going to choose GA fireblast.

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And with that, now we should be able to start with Fireblast.

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And we see it here, so we can see it in our menu as well.

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And we can activate it and it has a cost and cooldown.

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Great.

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So what are we going to do here in Fireblast?

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Well, I'd like to blast a bunch of fireballs.

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In fact, my description tells me what to do.

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Launches 12 fireballs in all directions, each coming back and exploding upon return.

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Now they cause zero damage because we haven't set that yet.

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So we still need to remember that our fireballs are not going to cause any damage.

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But what we can do is work on spawning those fireballs.

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And I'd like to make an actor class that can do what we need to do.

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And this class is going to be inheriting some things from Aura Projectile, because it is going to be

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a projectile.

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It's just going to be behaving a little bit differently.

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So I'm going to go into my actor folder where I have aura projectile.

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I'm going to make a new C plus plus class based on this.

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It can go in the aura folder, but I'm going to call this Aura Fireball.

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This will be different than the projectile file.

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It's going to be different than the Firebolt.

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It's going to have some additional properties to it.

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So I'm going to create the class, close down the editor saving all, and I'm going to close my folders

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and open Aura Fireball.

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And because it's based on Aura projectile I'm going to open Aura Projectile to see what we're inheriting.

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Now Aura Projectile has a few things that we're going to take advantage of.

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We have a projectile movement component.

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We have damage effect params.

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We have a homing target scene component.

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And I'm not going to make these fireballs homing projectiles.

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So we're not going to use that.

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But we do have beginplay.

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We have an on hit.

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And if we look at on hit, we see that we're spawning a system and playing a sound.

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And if our looping sound component is valid, we stop it and set be hit to true.

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This is a pretty useful function to have and that is protected, so we can use that in Aura Fireball.

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We've also overridden destroyed and in destroyed we stop that sound component and if not be hit and

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not has authority.

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We call on hit.

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So there's that as well.

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Now on sphere overlap is something we're going to want to have our own logic for, because on sphere

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overlap for these fireballs is going to be different.

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The behavior that I want for the fireball is I want it to pass through things.

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I don't want it to explode on impact with anything.

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I want it to explode when it comes back to aura.

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So aura projectiles on sphere overlap function should be virtual so that I can decide how the fireball

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behaves.

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So I'm going to make it a virtual function, and I'm going to override it in the protected section of

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Aura Fireball.

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So let's first add a public section and then a protected.

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And here in the protected section I'm going to override on sphere overlap.

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We're going to add override to the end here.

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And with this function we can go ahead and generate a definition line.

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And we're not going to call super because we don't want the same functionality as aura projectile.

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We don't want to blow up.

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All we want to do is pass through things and potentially cause damage to them.

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And we'll get to the damage part.

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But for now, we're overriding on sphere overlap and doing nothing for now.

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Now, aura projectile has a sphere component.

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It's set up properly already.

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It has a lifespan.

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That's fine too.

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It has be hits, which we can use if we decide to.

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And it also has an impact effect, an impact sound, a looping sound, and a looping sound component.

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And where does it spawn that looping sound?

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Well, it does so in Beginplay.

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If we go to or a projectile dot cp and look at Beginplay, we set the lifespan.

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We set replicated movement to true.

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We bind to on component began overlap for the sphere.

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Our on sphere overlap, and we also start that looping sound component and all that stuff sounds great.

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We're going to want our own functionality in addition to this, but we also want to call this functionality.

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So I'm going to override Beginplay virtual void Beginplay override.

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And I'm going to generate a definition and keep my call to super.

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So we do want super and Beginplay.

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We don't want super in on sphere overlap okay.

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So we have quite a few things here.

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What we can do now is we can create a blueprint based on this.

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But I'd also like to go into my fire blast spell.

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So or a fire blast.

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Here's the CP I'm going to open the header file two and I'm going to add to Aura Fire Blast, a class

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that we can use to spawn fireballs.

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So I'm going to add a private section for it.

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And I'm going to call this fireball class.

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It's going to be a subclass of of type A or a fireball.

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I'm going to forward declare it and call it fireball class.

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And we'll set this from the blueprint so it gets a uproperty.

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Edit defaults only.

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And we'll also have a function to spawn our fireballs, and we'll perform any algorithms that we need

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to determine the behavior of those fireballs.

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And that's going to be a public function.

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So I'm going to make a fireball spawning function.

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And I'd like this to return a 2D array of fireballs, all the fireballs that we spawn.

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So I'm going to return a 2D array of a or a fireball pointers and this will be called Spawn Fireballs.

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We'll capitalize B for balls.

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Now I'm going to make this a you function with blueprint callable.

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So it's easy to use within our ability blueprint.

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And I'm going to generate a definition for this.

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And for now leave it blank.

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And I'm going to collapse the functions of my Get descriptions.

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And with that, now that we have a fireball class, we can create a fireball blueprint and set the fireball

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class in Aura Fire Blast.

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So I'm going to compile and launch.

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Now, of course, I can't compile and launch, can I?

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I'm going to have to return something from spawn fireballs.

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So for now we'll just return a T array of A or a fireball pointers and it'll be an empty array that'll

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satisfy it for now.

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Back to the editor.

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So back in the editor, I'm going to open up fire blast I don't need or a character open anymore, and

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or a fire blast is going to need a fireball class.

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So we're going to make a blueprint for that in blueprints.

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And we'll go to Ability system or a abilities Fire fire blast.

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And we'll put the fireball here.

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I'm going to make a blueprint class based on Aura Fireball.

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And call this BP underscore fireball.

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So the fireball is different than the fire bolt, although it has some similarities.

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Right now.

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The first thing I'm going to do is select my sphere and click add and add a Niagara system.

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And this is going to be the fireball effect.

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And the fireball effect can be if we search for fire here we have a fireball.

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And if we browse to fireball it's right here next to our other projectile fire Niagara systems.

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And we can open it and see what it looks like.

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And it's a little bit different than the others.

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The others are kind of more of a slow burning ball of fire, but fireball looks like it's a lot faster

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because I plan on sending this out at a greater speed and having it come back.

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So this system is a little bit more appropriate for that.

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We'll see when we start spawning these.

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So I'm going to close those systems and we have our fireball effect.

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We also have some things to set in the details panel.

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We can scroll down to Aura Projectile and we need to set an impact effect.

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Now, if we search for explosion, we have two versions of it.

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There's explosion one, which looks like this.

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And there's explosion, which is a little bit different.

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In fact, I think we changed this one a lot by hiding the sparks and the explosion here.

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So now we see what it really looks like.

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There's even a shine part of it.

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There we go.

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So here's explosion and here's explosion one I think we're already using this.

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We can use the other one for fireball.

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So nice fire explosion I'm going to browse to it and set it here.

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It's going to be fire explosion.

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Impact sound can be the same sound we're using for our fire bolt.

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So I'm going to just find that.

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I'm just going to go to our Firebolt in our abilities, fire Firebolt and open up Firebolt.

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I'm going to scroll down and find Firebolt Impact and then select it and go back to fireball and set

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it there.

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I'm going to do the same for the looping sound.

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It's the Firebolt hiss.

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I'm going to set that as well.

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So with that we have those properties set.

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We can save I'm going to close those Niagara systems.

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I'm going to close Firebolt and we have a fireball.

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Now we're going to need to spawn some of these.

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And for aura projectile movement.

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I'm actually not going to use projectile movement.

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That's right.

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I don't want projectile movement.

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I'm going to set initial speed and max speed to zero, because I want to move this thing myself.

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Now.

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Yes, that means we could just go ahead and make a new actor, but I'd like to inherit the other things

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from Aura Projectile.

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And I'm just going to take this projectile movement component and uncheck start with tick enabled and

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just make it kind of a dead component that we don't use.

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I'm also going to take projectile movement component and uncheck Auto activate.

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So now it doesn't do anything.

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And if we bring one of these in.

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By browsing to it and dragging in an aura fireball.

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We can press play and we'll see that it just sits there.

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Now it has a lifespan, so it will explode after 15 seconds.

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But that's all it does.

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So really nothing too crazy.

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I'm going to control this fireball by other means and we'll see how soon.

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So with that we have an Aura Fireball.

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GA Fire Blast can have its fireball class now set to BP Aura Fireball.

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And with that, we're now ready to start spawning these things and we'll handle that next.

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Great job.

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I'll see you soon.