WEBVTT 00:06.810 --> 00:07.890 Welcome back. 00:08.070 --> 00:13.560 So we've got some sounds now, and our Goblin spear is just a little bit better. 00:13.560 --> 00:15.690 But I'd like even more effects. 00:15.690 --> 00:22.620 I'd like effects for when the spear impacts with something, but I don't want to just add some kind 00:22.620 --> 00:29.910 of a notify in the montage for the attack because if the spear just misses, I don't want anything there. 00:29.910 --> 00:37.770 But if it does get a hit, I want to see some kind of impact effect and perhaps hear an impact sound. 00:37.770 --> 00:42.030 So what we're going to do is let's see what effects we have. 00:42.030 --> 00:46.620 We'll go into effects combat and blood impact. 00:46.650 --> 00:48.300 Now we have this blood impact. 00:48.300 --> 00:53.460 It's a little bit cartoony, but that fits with the style for the rest of the assets in this project. 00:53.460 --> 00:58.500 But if you're using your own assets, of course you can use really any effect that you want. 00:58.500 --> 01:01.230 But this is a nice flashy blood effect. 01:01.230 --> 01:08.260 And I'd like to play this, but the thing is, different characters might have different impact effects. 01:08.260 --> 01:13.330 You might have some kind of fantasy creature that has blue blood or green blood or something. 01:13.330 --> 01:19.000 And by the way, if you wanted a green blood splatter, you could come into this blood impact. 01:19.000 --> 01:23.020 I would duplicate it first, but then you could go to initialize particle. 01:23.020 --> 01:29.320 And here's the color here used by this effect, you could change it to green if you wanted to like this 01:29.320 --> 01:31.030 and then you'd have a green effect. 01:31.150 --> 01:33.070 I'm going to control Z to undo that. 01:33.070 --> 01:35.530 But just showing you that it's pretty easy. 01:35.530 --> 01:42.640 And because we could do this, I'd like the blood effect to be retrieved from the target that we hit 01:42.640 --> 01:44.350 with our melee ability. 01:44.350 --> 01:47.500 So our melee ability is causing damage. 01:47.500 --> 01:53.200 What it can do at the same time as it causes damage is it can spawn some kind of blood effect. 01:53.230 --> 02:00.220 Now, being a top down game, I'm not too concerned with 100% accuracy location wise. 02:00.220 --> 02:05.950 When we hit something, when we hit something, I'd like to spawn that blood effect just about at the 02:05.950 --> 02:06.820 tip of the spear. 02:06.820 --> 02:08.080 At the tip socket. 02:08.660 --> 02:12.880 So we can get that combat socket location associated with the montage. 02:12.890 --> 02:14.630 We have that in our ability as well. 02:14.630 --> 02:20.420 So since we need to get the blood effect from the target that we're hitting, that would be a good thing 02:20.450 --> 02:27.170 to first of all, add to our base character class and then add a function to retrieve it from our combat 02:27.170 --> 02:28.070 interface. 02:28.070 --> 02:31.070 So we have two things that we're going to want to do here. 02:31.070 --> 02:33.530 So we're going to do that on the C plus plus side. 02:33.530 --> 02:35.210 So I'm going to close the editor. 02:35.450 --> 02:41.630 And from here in Writer, I'm going to go into the character folder, into Aura character base, and 02:41.630 --> 02:48.260 I'm going to add a Niagara system variable that we can set from blueprint for the impact specifically 02:48.260 --> 02:49.190 for blood. 02:49.220 --> 02:55.340 So just at the bottom of our protected section, I'm going to add a new variable. 02:55.340 --> 02:57.040 It's going to be a U. 02:57.050 --> 02:58.640 Niagara system. 02:58.640 --> 03:00.890 Writer is going to ask if I want to forward declare it. 03:00.890 --> 03:01.790 I do. 03:01.880 --> 03:03.320 And this will be. 03:04.450 --> 03:11.020 Blood effect and it's going to be added anywhere and we'll make it blueprint read only so we can access 03:11.020 --> 03:12.360 it from Blueprint as well. 03:12.370 --> 03:18.850 Now I want a function to return this, but I want it on my combat interface so we don't have to cast 03:18.850 --> 03:22.390 two or a character base or one of its child classes. 03:22.390 --> 03:25.870 So we're going to go into interaction combat interface. 03:25.870 --> 03:30.910 And here in the combat interface, we're going to make a Blueprint Native event, and I'd like it to 03:30.910 --> 03:32.830 be Blueprint Callable as well. 03:33.160 --> 03:39.640 So down at the bottom I'm going to make a function that returns a you Niagara system pointer. 03:39.640 --> 03:42.070 I'm going to add the forward declaration up there. 03:42.770 --> 03:46.270 So Ryder just stuck it way up there. 03:46.280 --> 03:47.780 That's fine. 03:47.900 --> 03:52.510 And I can drag this you anim montage way up there as well. 03:52.520 --> 03:54.500 That's fine if that's up there too. 03:54.500 --> 03:59.990 And this will be a pointer and we'll call this function get blood effect. 04:00.530 --> 04:04.130 And as I mentioned, I want it to be a blueprint native event. 04:04.130 --> 04:08.960 So we'll go ahead and copy the U function for this Blueprint Native event. 04:10.390 --> 04:16.330 And we can override the implementation version in or a character base and just return that effect. 04:16.330 --> 04:24.280 So we'll do it Inside of this comment section here, we're going to say virtual you Niagara system pointer, 04:24.310 --> 04:31.930 get blood effect implementation and we'll go ahead and generate the definition and return our blood 04:31.930 --> 04:32.590 effect. 04:33.970 --> 04:34.870 Cool. 04:35.170 --> 04:35.560 Okay. 04:35.560 --> 04:40.810 So now that we have a way to get the blood effect, we're planning on getting that from the victim. 04:40.810 --> 04:43.300 We're hitting an attack montage. 04:43.300 --> 04:47.440 Should have some kind of hit sound as well, some impact sound. 04:47.440 --> 04:54.010 But it's going to depend, I think, on the montage itself, because we might have one attack animation 04:54.010 --> 04:58.540 that swipes with a hand, another attack that swipes with a weapon. 04:58.540 --> 05:03.850 So I think this should be closely linked up with that attack animation. 05:03.850 --> 05:12.410 Now, if we go back to our character base and we search for attack montages, we have the array of tagged 05:12.410 --> 05:13.490 montages. 05:13.490 --> 05:19.760 And if we just go to the declaration or usages, we see that it's in the combat interface, we could 05:19.760 --> 05:25.850 easily associate a sound effect with a given attack montage that we can play or not play, depending 05:25.850 --> 05:27.940 on whether we got a successful hit. 05:27.950 --> 05:35.930 So I'm going to add a U sound base pointer to this and I'm going to call this impact sound and set it 05:35.930 --> 05:38.570 to null by default null pointer. 05:38.600 --> 05:43.340 Give it the same U property as the others in the struct like so. 05:43.340 --> 05:47.000 And now we can set an impact sound per attack. 05:47.570 --> 05:50.780 Okay, so let's go ahead and compile and launch. 05:52.280 --> 05:52.940 All right. 05:52.940 --> 05:59.360 So back in the editor, what I'm going to do is first open up aura character and I'm going to search 05:59.360 --> 06:00.320 for combat. 06:00.320 --> 06:02.150 And here's my blood effect. 06:02.150 --> 06:05.930 I'm going to set that and I'm going to choose blood impact for that. 06:06.230 --> 06:08.450 So now Aura has a blood impact. 06:08.480 --> 06:15.410 Now we can just go into the character folder and BP enemy base and just set this on the base enemy blueprint 06:15.410 --> 06:16.250 as well. 06:16.250 --> 06:19.550 So I'm going to search for blood and set that to blood impact. 06:19.550 --> 06:21.920 And now all enemies will just have that red blood. 06:21.920 --> 06:24.770 But you can override that per enemy if you like. 06:24.830 --> 06:27.410 So now our Aura character has blood. 06:27.590 --> 06:37.100 We can also go into our Goblin Spear blueprint, BP Goblin Spear into its attack montages and notice 06:37.100 --> 06:42.770 that the single array element in attack montages now has an impact sound. 06:42.770 --> 06:48.500 So what would be a good impact sound to play in the event that our Goblin Spear hits something? 06:48.590 --> 06:51.050 Well, let's take a look at content assets. 06:51.050 --> 06:57.510 Sounds and hidden within some of these folders there's a sound I think I'd like to play. 06:57.510 --> 07:04.740 If we go into Enemies Ghoul and Swipe, I think this would be a pretty decent impact for a spear. 07:04.740 --> 07:13.170 So I'm just going to make a sound effect here and I'd like to go to the Sounds folder into the SFX template 07:13.170 --> 07:13.590 multi. 07:13.620 --> 07:16.620 I'm going to copy that into the swipe folder in Ghoul. 07:16.620 --> 07:21.120 So drag over to swipe copy here and open that. 07:21.120 --> 07:29.310 I can go ahead and just rename it right away to SFX, underscore swipe and I can open it up and I'm 07:29.310 --> 07:35.760 going to open the content drawer, click doc and layout and I'm going to go into Enemies Ghoul Swipe 07:35.760 --> 07:37.380 and get these three. 07:37.380 --> 07:43.080 I'm going to select my input array and drag all three in for that and press play. 07:43.800 --> 07:44.760 And there it is. 07:44.760 --> 07:46.020 Now it's a bit loud. 07:46.020 --> 07:51.660 So I'm going to select my volume multiplier and put this way down like 0.1. 07:55.170 --> 07:56.700 That might be a little too low. 07:56.700 --> 07:57.450 So let's go. 07:57.450 --> 07:58.680 0.25. 07:59.330 --> 08:01.610 And I think that sounds pretty good. 08:01.610 --> 08:03.770 And of course, you're going to want to test this. 08:03.800 --> 08:11.000 Ideally, you would test with some studio monitors as you're playtesting the game and make sure everything 08:11.000 --> 08:12.410 is just right. 08:12.410 --> 08:20.090 So I'm going to put this SFX swipe into my Goblin Spear and its attack montages array right here for 08:20.090 --> 08:21.380 the impact sound. 08:21.590 --> 08:26.840 So with SFX Swipe selected and I can set that impact sound. 08:27.140 --> 08:34.430 So now that I know this is set, at least for Goblin Spear, I can go about playing this sound effect 08:34.430 --> 08:39.740 and spawning the blood particles and I'm going to do that in my melee attack ability. 08:39.740 --> 08:48.050 So I'm going to go to content blueprints, ability system, enemy abilities and open gar melee attack 08:48.230 --> 08:53.180 and go all the way to the end here where what we're doing is causing damage. 08:53.180 --> 09:00.840 But we're doing so in this for loop and a for each loop looping over all live players within radius. 09:00.840 --> 09:06.570 Now we're checking to see if it's a friend and if it's not a friend, we're causing damage. 09:06.570 --> 09:09.750 Well, we're also going to do is spawn those blood effects. 09:09.750 --> 09:13.650 Now, remember, we're going to spawn the blood effects at the tip of the spear. 09:13.650 --> 09:21.090 So if this goblin happens to damage to auras or to player controlled characters that happen to be within 09:21.090 --> 09:28.410 the radius of that sphere at the tip of the spear, there's really no point in playing to impact sounds 09:28.410 --> 09:34.830 and spawning two blood particles unless, of course, both characters had different blood particles. 09:34.830 --> 09:40.560 So I guess in the case of blood particles we could spawn two blood particles, but no point in playing 09:40.560 --> 09:43.530 the impact sound more than once at the same time. 09:43.530 --> 09:45.990 That's just not necessary. 09:46.020 --> 09:53.550 So what I'd like to do is if we reach the true case here, I'd like to create a Boolean variable called 09:53.550 --> 09:54.630 hit target. 09:54.630 --> 10:01.230 Or rather than hit Target, I'm going to call it has hit target as hit target sounds like a noun, like 10:01.230 --> 10:04.620 something that you would store, like a reference to a hit target. 10:04.620 --> 10:09.240 But this is a boolean, whether or not we have hit a target and if we've caused damage, we're going 10:09.240 --> 10:11.640 to set has hit target to true. 10:12.170 --> 10:18.320 And by the end of this, before we end our ability at the end of this, for each loop we're going to 10:18.320 --> 10:21.020 check that has hit Target Boolean. 10:21.020 --> 10:25.100 And if we have, then we're going to play the sound once. 10:25.100 --> 10:29.830 So we're going to use has hit target for the condition and we'll play that sound. 10:29.840 --> 10:35.390 But regardless of whether we play the sound or not, we're going to end the ability so both the true 10:35.390 --> 10:37.280 and false will end the ability. 10:37.280 --> 10:44.180 But in the true case here, we're going to play one sound and that's going to be the sound associated 10:44.180 --> 10:46.270 with our tagged montage. 10:46.280 --> 10:48.440 Now notice we have an impact sound. 10:48.560 --> 10:54.110 We're going to drag that down and create a reroute node and we're going to reroute it all the way over 10:54.110 --> 10:54.830 here. 10:55.040 --> 10:59.360 So another reroute node and then we're going to play this sound. 10:59.360 --> 11:04.430 So what we're going to do is play sound at location. 11:05.340 --> 11:07.290 And what is the location? 11:07.290 --> 11:11.610 It's going to be the combat socket location that we got here. 11:12.650 --> 11:14.150 So we'll hook that in. 11:14.750 --> 11:16.670 Just tidying this up a bit. 11:17.510 --> 11:19.400 And this will be for the true case. 11:19.400 --> 11:24.410 So the true case, we play the sound, but we also end the ability right after. 11:26.450 --> 11:27.290 Okay. 11:27.620 --> 11:31.200 And then, of course, we can spawn the impact particles. 11:31.220 --> 11:35.000 We could do that right here when we cause damage. 11:35.210 --> 11:42.050 So we're going to use the blueprint callable function, get blood particles or get blood effect, we 11:42.050 --> 11:42.920 called it. 11:42.920 --> 11:48.250 And this will be on the target, which is the array element here in the for loop. 11:48.260 --> 11:55.790 So we're going to get this node here, add a reroute or reroute it over here. 11:57.660 --> 12:03.420 And we're going to get that blood effect and we're going to spawn system at location. 12:06.590 --> 12:07.790 Like so. 12:10.970 --> 12:17.720 And the system will be the blood effect and the location is going to be this combat socket location, 12:17.720 --> 12:24.470 which I'm now starting to think that I should store in a variable so we can keep this a little bit neater. 12:24.470 --> 12:31.790 So I'm going to just highlight from this point backward and bring things back a bit. 12:31.790 --> 12:38.900 And I'm going to promote this to a variable and call this combat socket location and we're going to 12:38.900 --> 12:41.000 set that as soon as we've gotten it. 12:41.550 --> 12:43.290 And use it here. 12:43.920 --> 12:46.260 And then we can just use a getter for it. 12:46.260 --> 12:49.470 That's what I prefer to keep these nodes under control. 12:50.670 --> 12:53.700 We'll just use a getter for that combat socket location. 12:53.700 --> 12:57.030 And we don't need to drag too many wires all over the place. 12:57.030 --> 13:00.300 And we're going to use that combat socket location here. 13:01.870 --> 13:05.130 We can leave the rotation at zero and the scale at one. 13:05.140 --> 13:08.920 All the rest of these settings can be at their defaults. 13:08.950 --> 13:10.240 That looks good. 13:11.040 --> 13:18.630 Now, we did store our tagged montage in a variable as well, so we really don't have to run this big 13:18.640 --> 13:20.940 root node over here if we don't want to. 13:20.970 --> 13:27.300 We could just get that tagged montage out and break it and we can get that impact sound and hook it 13:27.300 --> 13:28.500 in directly here. 13:29.280 --> 13:37.380 So just minimizing the number of nodes that we need reroutes for and that looks better. 13:37.530 --> 13:41.220 We can do the same thing right here if we wanted to as well. 13:41.250 --> 13:43.020 For now, I think it's okay. 13:43.380 --> 13:44.150 Okay. 13:44.160 --> 13:48.150 Now the thing is, we're setting these each time we activate the ability. 13:48.150 --> 13:53.130 But if we go to class defaults and scroll down, we see that this is instance per actor. 13:53.130 --> 14:00.810 So that's okay that we have these member variables, but just realize that they keep their values each 14:00.810 --> 14:02.700 time we activate the ability. 14:02.700 --> 14:05.610 This ability has been instance and it sticks around. 14:05.640 --> 14:09.630 So in the case of combat socket location, for example, that's fine. 14:09.630 --> 14:11.400 We're setting it before we use it. 14:11.400 --> 14:13.170 But something like has hit target. 14:13.170 --> 14:19.410 This boolean should be set to false at the very beginning when we activate the ability because if we 14:19.410 --> 14:23.040 ever set it to true, it'll still be true next time we activate it. 14:23.040 --> 14:30.370 So we're going to set it to false at the very beginning of the ability and this on end ability is getting 14:30.370 --> 14:32.680 in my way, so I'm going to delete it. 14:33.190 --> 14:37.950 Okay, so now we should see and hear some additional effects. 14:37.960 --> 14:42.990 Let's save all and go ahead and let our spear enemy attack us. 14:43.010 --> 14:49.150 I'm going to go ahead and just remove the other enemies from the world so we can test just the spear 14:49.150 --> 14:49.750 enemy. 14:52.240 --> 14:53.530 And there we go. 14:56.780 --> 14:58.010 All right. 14:58.220 --> 15:00.110 It looks and sounds great. 15:00.230 --> 15:01.880 Much better, right? 15:01.970 --> 15:03.010 Excellent. 15:03.020 --> 15:06.140 And of course, we can increase the number of players to two. 15:08.440 --> 15:11.440 Now let's take a look on the client. 15:11.920 --> 15:15.790 And notice that we don't get our impact effects. 15:15.790 --> 15:19.300 We don't get the sound and we don't get that blood either. 15:19.420 --> 15:20.830 So why is that? 15:20.830 --> 15:22.180 What's going on here? 15:22.210 --> 15:28.240 Well, we're playing the sound and spawning those particles from a melee attack. 15:28.270 --> 15:31.360 Now, this is something that we execute on the server. 15:31.360 --> 15:34.300 We're executing it from a behavior tree task. 15:34.300 --> 15:40.870 And this is for a or enemy or a enemies are not controlled by a player. 15:40.870 --> 15:42.040 They're controlled by AI. 15:42.310 --> 15:47.320 Now we know that gameplay abilities are automatically replicated, right? 15:47.350 --> 15:52.180 Well, they're actually replicated to the owning client only. 15:52.180 --> 15:57.700 And no real players own this enemy, AI controlled character. 15:57.790 --> 16:03.610 So if we're spawning a system here in the gameplay ability and we're playing a sound, this is only 16:03.610 --> 16:05.380 going to happen on the server. 16:05.530 --> 16:10.290 It's not going to replicate to anyone because as no one owns this. 16:10.310 --> 16:16.070 So for that reason, if we want some cosmetic effects, we need a way to replicate those. 16:16.100 --> 16:23.840 And gas has a built in way to replicate those types of effects and that way is via the use of gameplay 16:23.840 --> 16:24.790 queues. 16:24.800 --> 16:30.830 So we're going to finally learn a little bit about gameplay queues so that we can get these types of 16:30.830 --> 16:35.450 effects working in our game and we'll handle that next.