WEBVTT 00:06.870 --> 00:08.160 Welcome back. 00:08.190 --> 00:15.240 Now that we've got things working pretty well and we have a test ability, it's time to start actually 00:15.240 --> 00:21.930 giving our abilities something to do as our test ability only prints debug messages to the screen. 00:21.960 --> 00:26.430 Now if I click just anywhere, I'm going to move to that location. 00:26.430 --> 00:32.100 But if I'm hovering over an enemy and I click, well, I activate my test ability. 00:32.460 --> 00:33.840 So that's great. 00:33.840 --> 00:39.900 We know that we can activate abilities and everything, but I'd like Aura to have some magical spells 00:39.900 --> 00:46.550 that she can cast, and that's going to require some real abilities that do real things. 00:46.560 --> 00:51.360 So the first spell that I'd like to make is a projectile spell. 00:51.720 --> 00:56.730 I'd like for Aura to cast a projectile like a fireball. 00:56.730 --> 01:06.060 And if we go to assets and characters or animations abilities, we have a cast firebolt function. 01:06.240 --> 01:07.630 It looks like this. 01:07.630 --> 01:10.240 So we have an animation that we can play. 01:10.240 --> 01:15.160 And if we're going to cast a firebolt, we need a firebolt effect. 01:15.160 --> 01:22.840 And if we go to assets, effects and projectiles, we have this firebolt and there are three versions. 01:22.840 --> 01:25.600 If we open them, I'm opening fire. 01:25.600 --> 01:28.450 Three you'll see that this is what they look like. 01:28.450 --> 01:29.890 They look like fireballs. 01:29.890 --> 01:31.210 Pretty exciting. 01:31.360 --> 01:37.720 So I'd like to launch one of these and that is going to be our first major ability. 01:37.720 --> 01:45.190 And this happens to be an ability that will require quite a few different aspects and mechanics to it. 01:45.490 --> 01:52.270 So this will be a great learning experience for how abilities work now, because we're going to want 01:52.270 --> 01:54.250 to spawn projectiles. 01:54.250 --> 02:01.810 We need a class for a projectile to spawn and we're going to create a projectile class in this video. 02:01.810 --> 02:04.000 So let's go ahead and do it. 02:04.030 --> 02:10.540 We're going to go into our C plus plus classes or a public actor folder. 02:10.540 --> 02:13.390 I think we can put this right here in the actor folder. 02:13.390 --> 02:14.860 It's going to be an actor. 02:14.980 --> 02:19.030 So let's make a new C plus plus class based on actor. 02:19.120 --> 02:25.270 Click next and we're going to call this aura projectile. 02:25.270 --> 02:27.550 Let's go ahead and create this class. 02:29.510 --> 02:31.000 And I'll close the editor. 02:31.010 --> 02:35.500 And in this aura projectile class, we're going to put some basic things that we need. 02:35.510 --> 02:42.620 So I'm going to go ahead and close all the tabs and open aura projectile dot h and we can start to sort 02:42.620 --> 02:45.500 of rearrange this basic actor. 02:45.500 --> 02:51.710 So first of all, I don't plan on using the tick function, so we're going to remove it altogether. 02:51.920 --> 02:58.910 I'm also going to remove these comments as I don't feel like we need them and I'm going to go into the 02:58.910 --> 03:07.430 CPP file and remove tick from here, remove the comments as well and set primary actor tick be ever 03:07.430 --> 03:11.660 tick equal to false in the constructor so we don't tick. 03:11.900 --> 03:17.420 And without those comments we're stripped out and it looks clean. 03:17.750 --> 03:21.260 So what do we want in Aura Projectile? 03:21.530 --> 03:24.980 Well, we want to be able to hit something. 03:24.980 --> 03:32.940 I'd like to use overlap events for this and what we saw with our Effect actor is we could add that overlap 03:32.940 --> 03:40.740 volume in blueprint and we wouldn't really need access to it in C plus plus as long as we created a 03:40.740 --> 03:46.920 blueprint callable function that we could call from the blueprint and pass in any important information 03:46.920 --> 03:49.800 such as the actor that was overlapped. 03:49.830 --> 03:58.800 We can take that approach here if we'd like and then leave it up to the blueprint side to add that projectiles 03:58.800 --> 04:00.480 overlap volume. 04:00.480 --> 04:06.240 If we want to do that, another option is to just add it here in C plus plus, if we know it's always 04:06.240 --> 04:13.050 going to be, say, a sphere, if we don't think we'll ever need a projectile that has a box or capsule 04:13.050 --> 04:19.350 collision volume, we could just add a sphere right here so we could do it that way. 04:19.470 --> 04:22.170 I'm going to do it that way for the projectile. 04:22.170 --> 04:27.120 I think all of our projectiles are going to want a sphere overlap volume. 04:27.240 --> 04:40.380 So I'm going to make a private section and I'm going to add a T object pointer to type U sphere component. 04:40.800 --> 04:50.340 I'm going to add a forward declaration for it and we'll call this sphere and it gets a U property. 04:53.690 --> 04:55.430 With visible anywhere. 04:56.610 --> 04:59.970 Now we'll create an en overlap function for it. 04:59.980 --> 05:10.260 So let's make a void function en sphere overlap which we'll need a u primitive component pointer called 05:10.260 --> 05:11.370 overlapped. 05:13.100 --> 05:14.060 Component. 05:15.690 --> 05:22.290 An actor called other actor a you primitive component pointer. 05:25.230 --> 05:39.390 Called other comp and in 32 other body index, a bull called B from sweep and a const F hit result. 05:40.970 --> 05:43.790 Reference called sweep result. 05:45.270 --> 05:47.970 And this must be a new function. 05:49.080 --> 05:57.150 So let's create that function definition and we're going to construct our sphere component and then 05:57.150 --> 06:00.000 bind our on sphere overlap to it. 06:00.000 --> 06:07.950 So first we'll construct it here in the constructor sphere equals create default Subobject use sphere 06:07.980 --> 06:09.090 component. 06:09.990 --> 06:11.910 We'll call this sphere. 06:13.070 --> 06:15.410 We'll let the root component be the sphere. 06:15.410 --> 06:19.760 So let's set root component to the sphere. 06:20.360 --> 06:28.130 And now that we have a sphere, we'll go into begin play and say sphere on component. 06:30.160 --> 06:31.360 Begin overlap. 06:31.660 --> 06:33.280 Add dynamic. 06:35.110 --> 06:40.630 With this and or a projectile on sphere overlap. 06:42.340 --> 06:43.150 Great. 06:43.420 --> 06:47.830 Now my sphere should be set to query only. 06:47.830 --> 06:58.270 So I'm going to say sphere set collision enabled to collision enabled query only. 06:59.910 --> 07:06.330 And I'm going to set it to ignore all channels except for the select few that I want it to overlap with. 07:06.360 --> 07:08.250 So we're going to say sphere. 07:10.150 --> 07:13.270 Set collision response to. 07:13.270 --> 07:21.670 And I want it to be to all channels and I'd like to use ECR, ignore collision, response, ignore. 07:22.000 --> 07:27.040 And then I'd like to set collision response to specific channels. 07:27.040 --> 07:30.480 So set collision response to channel. 07:30.490 --> 07:34.000 I'm going to choose EC World dynamic. 07:34.000 --> 07:36.040 We'll go ahead and overlap that. 07:36.040 --> 07:37.960 So ECR overlap. 07:39.240 --> 07:46.740 And I'm going to copy this line and paste it and change this to make world static. 07:46.830 --> 07:51.630 We'll overlap those and I'd like to overlap with the pawn type as well. 07:51.630 --> 07:55.380 So EQ pawn will overlap those as well. 07:56.280 --> 07:58.170 Okay, so now we have a sphere. 07:58.170 --> 08:03.510 It's got an overlap callback and this is a projectile, right? 08:03.510 --> 08:06.270 So it needs a way to fly through the air. 08:06.390 --> 08:12.110 The perfect way to handle that, especially in multiplayer, is with the projectile movement component. 08:12.120 --> 08:14.010 So we're going to add one of those as well. 08:14.400 --> 08:16.650 I'm going to go ahead and forward declare that right away. 08:16.650 --> 08:25.560 And the type is you projectile movement component and I can foresee myself needing to access this from 08:25.560 --> 08:31.530 outside the class because in the future we're going to want to set parameters on it. 08:31.530 --> 08:40.450 Potentially, we may wish to make it a homing projectile and set its homing projectile target, things 08:40.450 --> 08:40.870 like that. 08:40.870 --> 08:43.280 So I'm going to make this a public component. 08:43.300 --> 08:51.640 It's going to be a T object pointer of type U projectile movement component called projectile movement, 08:52.030 --> 08:55.540 and it's going to get a U property with visible anywhere. 08:55.990 --> 08:59.850 And just like our sphere, we'll construct it right here. 08:59.860 --> 09:02.350 We'll say projectile movement. 09:04.390 --> 09:11.470 We'll use Createdefaultsubobject writer is quick to give me lots of autocomplete stuff, but I want 09:11.500 --> 09:14.350 create default subobject with you. 09:14.350 --> 09:15.580 Projectile. 09:16.820 --> 09:18.200 Movement component. 09:18.230 --> 09:21.320 I'm going to call this simply projectile movement. 09:22.100 --> 09:25.380 It tried to include navigation system types there. 09:25.400 --> 09:26.570 No, thanks. 09:26.570 --> 09:30.470 And we're going to set a initial speed. 09:30.470 --> 09:34.310 So projectile movement, initial speed. 09:34.340 --> 09:36.980 We'll go ahead and give that a default value. 09:37.010 --> 09:38.840 Let's give it 550. 09:40.040 --> 09:42.260 We'll take projectile movement. 09:43.990 --> 09:47.050 Max speed will set that to the same value. 09:47.230 --> 09:50.260 550 and gravity scale. 09:50.260 --> 09:56.790 I'd like this to have no gravity, so I'm going to say projectile movement, projectile gravity scale. 09:56.800 --> 09:59.950 I'm going to set that to zero so we have no gravity. 10:00.370 --> 10:01.120 Okay. 10:01.240 --> 10:11.130 So we have basically a skeleton for a projectile class and we have something that will happen on overlap, 10:11.140 --> 10:13.840 basically an empty function that does nothing. 10:13.840 --> 10:21.160 But we'll definitely be fleshing this out with things that should happen, but we can go ahead and create 10:21.160 --> 10:22.050 one of these. 10:22.060 --> 10:25.060 Let's go ahead and compile and launch. 10:27.010 --> 10:31.990 And now that we're in the editor, we can create an aura projectile. 10:32.470 --> 10:36.340 Now we have our aura projectile class. 10:36.340 --> 10:39.580 But I'm going to make a blueprint based on this that's specific. 10:39.580 --> 10:41.680 I'm going to make a fireball class. 10:42.070 --> 10:47.560 Now, I could put it here in my actor folder, but this is going to be related to one of my gameplay 10:47.560 --> 10:48.520 abilities. 10:48.610 --> 10:53.560 So what I'm going to do is go into gameplay abilities here in blueprints, ability system, gameplay 10:53.560 --> 10:54.500 abilities. 10:54.520 --> 11:01.660 I'm going to make a new folder and I'm going to call this fire and I'm going to have all my fire abilities 11:01.660 --> 11:02.800 in this folder. 11:02.800 --> 11:10.450 And here in Fire I'm going to make a folder called Firebolt and Firebolt is going to contain my Firebolt 11:10.450 --> 11:11.950 ability once I make it. 11:11.950 --> 11:17.950 And any associated classes such as the Firebolt class, that's an aura projectile. 11:17.980 --> 11:21.720 I'm going to make that blueprint for the aura projectile now. 11:21.730 --> 11:24.220 So I'm going to base this on Aura Projectile. 11:25.500 --> 11:28.980 And call this BP underscore firebolt. 11:29.640 --> 11:33.230 I'm going to open it up and here's my firebolt. 11:33.240 --> 11:37.370 And the first thing we're going to add is a Niagara system. 11:37.380 --> 11:44.430 So I'm going to click on my sphere, click Add, Type Niagara and get a Niagara particle system component. 11:44.430 --> 11:49.320 Call this fire effect and set its Niagara system asset. 11:49.320 --> 11:54.900 I'm going to search for fire and choose Fire three. 11:54.900 --> 11:57.780 And there's my beautiful fireball. 11:57.990 --> 12:00.840 We're going to call this a firebolt, actually. 12:00.960 --> 12:02.490 And this looks great. 12:02.520 --> 12:04.320 Let's see what it looks like here in the world. 12:04.320 --> 12:07.800 I'm going to just drag one in, raise it up a bit. 12:07.800 --> 12:09.900 So here's what it looks like in the world. 12:09.900 --> 12:15.480 But of course, it has a velocity, so it's going to fly away, right? 12:15.510 --> 12:18.450 Let's put it right in front of our character. 12:19.800 --> 12:20.640 Oh, there it went. 12:20.640 --> 12:21.480 I don't know if you saw it. 12:21.480 --> 12:22.710 It was a bit quick. 12:22.830 --> 12:24.630 I'll put it over here to the left a bit. 12:24.630 --> 12:26.190 Let's put it behind the character. 12:26.670 --> 12:29.130 And there it goes. 12:29.130 --> 12:30.840 There goes that fireball. 12:30.870 --> 12:31.710 Beautiful. 12:31.830 --> 12:38.850 All right, so we have a projectile, and whatever direction it's facing is going to determine where 12:38.850 --> 12:39.420 it flies. 12:39.420 --> 12:45.300 If I move it that way a little bit and press play, it's going to fly off that way if I turn it this 12:45.300 --> 12:45.930 way. 12:47.160 --> 12:48.480 It's going to fly that way. 12:48.480 --> 12:49.410 You get the point. 12:49.950 --> 12:52.170 So we have something that can fly. 12:52.200 --> 12:53.610 Beautiful. 12:54.500 --> 13:01.880 So now that we have a projectile, we can create an ability that spawns these projectiles, a kind of 13:01.880 --> 13:07.850 fireball ability, a nice, offensive, magical attack that aura can use. 13:08.270 --> 13:15.260 So I'd like to do that in the videos to come and figure out how we can spawn projectiles when we activate 13:15.260 --> 13:16.310 this ability. 13:16.550 --> 13:19.730 So we'll do that in the videos to come. 13:19.730 --> 13:25.790 And before I wrap up just because I can, I'm getting a little tired of my checkered floor, so I'm 13:25.790 --> 13:34.820 just going to go ahead and go into my assets dungeon folder and find a couple of tiles and I'm going 13:34.820 --> 13:39.830 to get some tile one by one A and some tile one by one. 13:39.860 --> 13:44.300 B Let's see if there's a two by two and three by three. 13:44.300 --> 13:45.680 I think I have three by three. 13:45.710 --> 13:47.180 A That's a bigger one. 13:47.420 --> 13:49.220 Three by three B. 13:52.930 --> 13:54.820 And I think I'd like to just. 13:55.950 --> 13:58.030 Kind of cover this floor. 13:58.050 --> 14:03.120 In fact, I'd like to kind of get rid of this floor here and use these. 14:05.710 --> 14:10.240 If I open and show simple collision, I see that they have collision volumes. 14:11.690 --> 14:16.370 So I'm going to take some time to put some of these floor tiles out. 14:17.680 --> 14:22.360 And when we start the next video, you'll see that I have a much nicer floor. 14:22.690 --> 14:23.480 Excellent. 14:23.500 --> 14:25.120 I'll see you in the next video.