WEBVTT 00:06.810 --> 00:07.800 Welcome back. 00:07.800 --> 00:10.230 So we almost have the behavior we want. 00:10.260 --> 00:16.110 Our shaman summons some minions, and after that it launches fireballs. 00:16.110 --> 00:21.210 We want to summon more minions when we get below a certain threshold. 00:21.210 --> 00:27.990 In other words, if I kill four of these five enemies, then I want our minion to summon more. 00:28.080 --> 00:33.450 And that means our minion needs to know when an enemy has been killed. 00:33.450 --> 00:36.540 It needs to know when that enemy has died. 00:36.690 --> 00:42.990 Now an easy way is to go into our summon ability, and right after we spawn an actor, we take that 00:42.990 --> 00:52.380 actor and we type in on Destroyed and there's a delegate broadcast whenever something is destroyed. 00:52.410 --> 00:56.580 Now, yes, there's a delay of a few seconds. 00:56.580 --> 01:03.570 So once our enemy is killed, then there will be a delay of lifespan, which is a member variable we 01:03.570 --> 01:11.020 added to our character class after that delay, then the enemy will actually be destroyed, at which 01:11.020 --> 01:13.810 point it's on destroyed delegate will be broadcast. 01:13.810 --> 01:19.390 So this is something that works, if we don't mind that little bit of delay. 01:19.390 --> 01:21.760 So let's click Assign on Destroy. 01:21.760 --> 01:25.150 That's going to create a on destroyed event automatically. 01:25.150 --> 01:33.430 And when one of these minions is destroyed, we can use increment minion count passing in a negative 01:33.430 --> 01:36.370 one and we can hook that up. 01:36.370 --> 01:39.550 But this has to be our avatar actor. 01:40.050 --> 01:46.710 So we'll get that and pass that in for the target and this bind has to be reached. 01:46.920 --> 01:50.870 So we're going to bind shortly after spawning. 01:50.880 --> 01:53.070 So we'll put this bind right here. 01:54.280 --> 01:55.420 Like so. 01:56.060 --> 02:04.160 And then once we destroy an enemy that will result in decrementing our minion count. 02:04.190 --> 02:06.590 So let's test this out. 02:07.070 --> 02:08.420 I'm going to press play. 02:09.520 --> 02:11.310 There's our five minions. 02:11.320 --> 02:15.270 Let's make sure that we don't die in the process of testing this. 02:15.280 --> 02:17.380 I'm going to kill these. 02:17.380 --> 02:22.120 And as soon as we get down to one, within five seconds, we should see. 02:23.400 --> 02:25.170 Our shaman summoned more. 02:26.690 --> 02:29.120 All right, so we're down to one. 02:31.690 --> 02:33.040 Our shaman is not summoning. 02:33.040 --> 02:34.390 Yes, our shaman summoned more. 02:34.420 --> 02:36.090 There was that delay, remember? 02:36.100 --> 02:37.960 So we have that delay. 02:38.110 --> 02:41.290 But now we get the behavior we want. 02:41.290 --> 02:46.960 Our shaman will summon more if it's down to one minion left. 02:47.410 --> 02:50.650 Otherwise it's going to sit there launching fireballs. 02:50.680 --> 02:53.860 Now, another thing I'm noticing is my ranged. 02:53.860 --> 02:56.200 Demons are not throwing rocks, are they? 02:56.200 --> 03:03.040 And that tells me that I must not have their class, their character class set to elementalist. 03:03.810 --> 03:05.160 Let's see if we just get one more. 03:05.160 --> 03:06.130 Some in here. 03:06.150 --> 03:07.530 There, we got it. 03:07.740 --> 03:15.540 Okay, So I'm going to make sure that our ranged demons can do their range attacks real quick. 03:15.540 --> 03:22.680 So I'm going to go to Character Demon, Open Demon Ranger and search for character class. 03:24.970 --> 03:26.890 Yes, it's set to Warrior. 03:26.890 --> 03:29.590 We need to set this to Ranger. 03:30.540 --> 03:34.350 And now if we just really quickly test that. 03:34.380 --> 03:37.320 Now we see that they're launching their rocks. 03:37.350 --> 03:42.030 Looks like the rocks are colliding probably with the ground. 03:42.030 --> 03:45.600 It looks like the same issue that our shaman had. 03:45.600 --> 03:48.000 So we're going to go ahead and fix that. 03:48.420 --> 03:52.230 It looks like they're throwing the slingshot rock, right? 03:52.230 --> 03:56.610 So let's go to Blueprints Ability System Enemy. 03:57.540 --> 03:58.410 Abilities. 03:58.460 --> 04:00.300 BP Slingshot Rock. 04:00.840 --> 04:09.190 Their overlap sphere and we'll just use the same solution that we used in the Aura projectile. 04:09.210 --> 04:15.170 I don't really feel like making a base blueprint they can both derive from just to get this same behavior. 04:15.180 --> 04:20.340 All I want to do is in begin play, disable that sphere collision. 04:21.260 --> 04:23.690 So set collision enabled. 04:26.130 --> 04:27.570 We'll set it to no collision. 04:28.450 --> 04:31.300 We'll do a 0.1 second delay. 04:33.610 --> 04:34.870 0.1 seconds. 04:36.030 --> 04:40.260 And after that delay, we'll set collision enabled. 04:42.900 --> 04:44.610 And we'll set it to. 04:45.770 --> 04:46.880 Query only. 04:47.120 --> 04:49.640 In fact, we don't need to set collision enabled first. 04:49.640 --> 04:52.920 We can just do what we did in the fireball. 04:52.940 --> 04:57.440 We can just set this to no collision, No need to set it to no collision. 04:57.440 --> 05:02.030 We'll just have a delay and set it to query only after 0.1 seconds. 05:02.060 --> 05:03.710 Let's see if that helps. 05:07.270 --> 05:08.380 That's better. 05:08.800 --> 05:13.330 Although I do see that it's kind of throwing the rock downward. 05:15.220 --> 05:20.410 So for that reason, I'm just going to check out that ranged attack. 05:20.440 --> 05:22.170 Gar ranged attack. 05:22.180 --> 05:28.920 And let's just take a look at the projectile target location and see what that is. 05:28.930 --> 05:31.180 I'm going to draw a debug sphere for it. 05:34.650 --> 05:41.070 And that's going to be that combat target location that we're passing in to spawn projectile. 05:41.950 --> 05:48.040 And I'll give it a duration of three seconds, a radius of 12. 05:48.650 --> 05:50.840 And a line color of magenta. 05:51.660 --> 05:53.970 Let's see what that is, if we can see it. 06:01.780 --> 06:03.550 Okay, so it is. 06:04.500 --> 06:05.610 Looking correct. 06:05.610 --> 06:10.070 It's at our combat target location for them, which is aura. 06:14.730 --> 06:22.290 So for some reason, the Slingshot rock looks like it's colliding probably with the ground, which means 06:22.290 --> 06:26.910 that that sphere may have to be a bit smaller for the rock. 06:26.940 --> 06:28.560 Let's see if that fixes it. 06:32.350 --> 06:33.730 I think that does. 06:35.470 --> 06:36.760 Yep, that fixes it. 06:36.760 --> 06:41.980 And I think we will want to angle that rock upward and we'll do that. 06:42.650 --> 06:43.430 As well. 06:43.430 --> 06:50.510 I think what we can do is our ranged attack is calling spawn projectile, spawn projectile could have 06:50.510 --> 06:58.730 a pitch override and we can put some kind of a little bit of a pitch elevation of sorts for spawn projectile. 06:58.730 --> 07:06.110 And that way when we spawn one with or a projectile spell, then we can spawn it sort of at an upward 07:06.110 --> 07:06.790 pitch. 07:06.800 --> 07:13.730 So here in aura projectile spell, spawn projectile, we're setting the rotation here. 07:13.940 --> 07:21.440 The rotation is the vector from socket location to projectile target location, convert it to a rotator. 07:21.440 --> 07:25.160 What we can do is override that pitch, but only if we want to. 07:25.190 --> 07:33.470 So I'm going to make a parameter that can go into spawn projectile for overriding the pitch and a boolean 07:33.470 --> 07:35.420 for whether or not we want to do that. 07:35.420 --> 07:40.790 So Spawn Projectile can now take a bool called be override pitch. 07:41.600 --> 07:43.830 We'll set it equal to false by default. 07:43.830 --> 07:47.370 So if we don't pass anything in, nothing will happen. 07:47.370 --> 07:54.660 And then we'll have a float called pitch override and we'll set this to zero by default. 07:54.660 --> 07:57.720 And that way nothing will happen if we don't pass that one in. 07:57.720 --> 08:02.790 And then we'll add this to the CP file right here. 08:03.060 --> 08:09.900 We don't need to set those default values here just in the H file and we'll check if we should override 08:09.900 --> 08:10.710 the pitch. 08:10.710 --> 08:20.820 So for the rotation here, we'll say if be override pitch and if we do, we'll take our spawn transform's 08:20.820 --> 08:22.950 rotation and change it. 08:22.950 --> 08:27.930 In fact, we'll just change the rotation before setting the spawn transform rotation. 08:27.930 --> 08:32.310 So we'll do this right here just after setting the rotation. 08:32.310 --> 08:39.660 If be override pitch, then we'll take rotation, dot pitch and set it equal to pitch override. 08:40.440 --> 08:43.560 That way we can give a little bit of a pitch override. 08:43.560 --> 08:46.200 So let's go ahead and we'll close the editor. 08:48.290 --> 08:53.780 And we'll compile and launch again and set a pitch override for that ranged attack. 08:54.020 --> 08:57.290 This is going to affect our slingshot enemies as well. 08:57.290 --> 08:59.480 So something to keep in mind. 09:00.530 --> 09:01.010 Okay. 09:01.010 --> 09:08.540 So back here in ranged attack, if I check override pitch and I give this a value, say 35, then we 09:08.540 --> 09:11.680 should see those rocks thrown at a 35 degree pitch. 09:11.690 --> 09:13.280 Let's see if that works. 09:14.630 --> 09:15.290 There we go. 09:15.290 --> 09:15.860 Look at that. 09:15.860 --> 09:20.330 They're flying much farther because they're really launching those things. 09:20.450 --> 09:26.000 And that's going to also affect our slingshot enemies, by the way, as I mentioned. 09:26.000 --> 09:30.200 So that could be something we wish to parameterize. 09:30.200 --> 09:35.120 We could also make a ranged attack specific to the character. 09:35.120 --> 09:39.640 We could have a parameter on the character and an interface function to get it. 09:39.650 --> 09:46.250 There are numerous options, but I want to see just really quickly how this affects our slingshot enemy 09:46.250 --> 09:49.490 and we may find a value that works for both of them. 09:49.490 --> 09:54.980 So I'm going to go to Goblin Slingshot, drag in a goblin slingshot and press play. 09:57.340 --> 10:02.290 And of course, my goblin slingshot is behaving like a melee attacker. 10:02.290 --> 10:09.340 And that's because if I right click on it and edit Goblin, Slingshot and search for character class. 10:09.370 --> 10:11.610 Sure enough, it's set to Warrior. 10:11.620 --> 10:13.720 I want it set to Ranger. 10:13.750 --> 10:15.700 Now it'll act like a ranger. 10:16.970 --> 10:18.020 There we go. 10:18.260 --> 10:20.870 So it's a little bit high. 10:20.900 --> 10:25.100 I think it's a little high for the rock to actually it looks good for the rock. 10:25.250 --> 10:26.900 And I think. 10:28.190 --> 10:30.260 Our enemies pitch. 10:31.220 --> 10:33.200 For the slingshot is a little high. 10:34.270 --> 10:41.080 Now, realistically, you could calculate the distance between them and calculate the correct pitch 10:41.080 --> 10:43.720 that would give you an accurate shot. 10:43.780 --> 10:48.860 And that would be a bit of a kind of physics problem to solve, which would be pretty fun. 10:48.880 --> 10:50.320 I'm not going to go that deep. 10:50.320 --> 10:56.950 I'm just going to take my range attack and set the pitch override to 25 and call it done. 10:56.950 --> 10:58.780 But take it as an optional challenge. 10:58.780 --> 11:02.650 If you'd like to calculate the pitch dynamically based on distance. 11:02.650 --> 11:04.290 But I think this is good. 11:04.300 --> 11:11.620 This gives you a bit of a distance that will be considered dangerous for you that you can try to avoid. 11:13.650 --> 11:14.550 Perfect. 11:17.050 --> 11:22.390 And of course, if we eliminate some of these demons, if we don't die in the process. 11:23.120 --> 11:26.150 Well, then we'll get more demons spawned. 11:26.150 --> 11:27.830 But it looks like I died, so. 11:28.040 --> 11:30.960 Okay, well, we did what we set out to do. 11:30.980 --> 11:33.650 We now have a minion count. 11:33.650 --> 11:41.000 And as long as that minion count gets down to below the minion count threshold, we get more minions. 11:41.000 --> 11:43.730 And I'm just going to really quickly test that. 11:43.760 --> 11:50.630 This is a little bit harder with all rock throwing enemies, but we're going to manage and once we get 11:50.630 --> 11:55.900 more powerful abilities, then we won't be so overwhelmed. 11:55.910 --> 12:01.190 Okay, we're down to one and let's see if we can get that summon ability. 12:01.220 --> 12:02.320 There it is. 12:02.330 --> 12:03.680 We have the summon ability. 12:03.710 --> 12:04.610 Perfect. 12:05.060 --> 12:06.290 Excellent job. 12:06.320 --> 12:11.720 In the next video, we'll work on summoning those minions in a more attractive manner rather than just 12:11.720 --> 12:12.730 popping in. 12:12.740 --> 12:15.350 We'll be adding some juice to our game. 12:15.530 --> 12:16.370 Excellent. 12:16.370 --> 12:18.140 I'll see you in the next video.