WEBVTT 00:00.270 --> 00:02.880 Welcome back to your next quest. 00:03.060 --> 00:06.300 You're going to spawn the rock projectile. 00:06.420 --> 00:10.290 Now, from the ranged attack, go ahead and spawn the projectile. 00:10.290 --> 00:16.920 And as a bonus, add a little bit of a spin to the rock as just a flying rock. 00:16.920 --> 00:20.190 That doesn't spin, doesn't seem very convincing. 00:20.190 --> 00:27.510 So add a random spin to the rock any way that you know how, and then see if you can launch some of 00:27.510 --> 00:28.200 these rocks. 00:28.200 --> 00:31.590 So pause the video and conquer this quest now. 00:34.590 --> 00:39.100 Okay, so instead of drawing a debug sphere, I'd like to spawn a projectile. 00:39.120 --> 00:46.170 Now, because my projectile spell has this blueprint callable function spawn projectile, I can just 00:46.170 --> 00:47.130 call that. 00:47.160 --> 00:55.290 Now it needs a target location and luckily we have a combat target and we can access that with get combat 00:55.290 --> 00:56.160 target here. 00:56.160 --> 01:02.850 So I'm going to take these two nodes and just control D over here with those selected to get that combat 01:02.850 --> 01:03.510 target. 01:03.510 --> 01:05.310 And we're going to spawn the projectile. 01:05.310 --> 01:12.000 Now, actually, we didn't need our combat socket location as spawn projectile gets that for us, but 01:12.000 --> 01:18.090 we do need to know which direction to shoot that projectile, which is why we need that combat target 01:18.090 --> 01:24.150 and we're going to get its actor location and pass that in to spawn projectile. 01:24.450 --> 01:30.530 Now let's see if our enemies are launching rocks and it looks like they are. 01:30.540 --> 01:33.750 It's a little bit hard to see those rocks. 01:35.410 --> 01:38.610 Looks like they're actually hurting each other as well. 01:38.620 --> 01:41.880 So that's something that we want to take care of, don't we? 01:41.890 --> 01:46.240 But we're launching something it's a bit harder to see. 01:46.240 --> 01:54.070 So I'm going to go into my X testing map, which has a lot less stuff in here, and I'm going to set 01:54.070 --> 01:57.610 my game mode override to BP or a game mode. 01:57.640 --> 02:02.860 I'm going to remove the Aura character and drag in a player start. 02:02.860 --> 02:07.570 So going to all classes, scrolling down to player start. 02:08.860 --> 02:10.390 Dragging that in. 02:13.170 --> 02:19.470 And I'll go ahead and drag in a goblin slingshot just to see if it's going to shoot at me. 02:19.710 --> 02:24.990 So we'll go to character Goblin, Slingshot and drag one of those in like so. 02:26.180 --> 02:27.860 So saving all. 02:27.860 --> 02:29.150 I'm going to press play. 02:30.810 --> 02:33.240 And let's see if that goblin slingshot. 02:36.150 --> 02:44.520 Looks like it's coming straight at me, so I'm going to check its character class and it's set to Warrior, 02:44.520 --> 02:46.200 so we should set it to Ranger. 02:46.230 --> 02:48.320 That way it knows it's a ranged attacker. 02:48.330 --> 02:49.920 Then it's going to work. 02:50.310 --> 02:56.430 Okay, so it's launching something I seem to only see really its shadow though. 02:58.910 --> 03:03.140 But let me pause the video and zoom in to make sure. 03:03.170 --> 03:05.960 No, it is indeed a rock. 03:05.990 --> 03:09.470 It's just a little small and kind of hard to see. 03:09.560 --> 03:12.620 So there are things we can do to fix that. 03:12.620 --> 03:17.810 Of course, we can make the rock bigger if we wanted to do that. 03:17.810 --> 03:20.180 That's one thing I think I'll definitely do. 03:20.180 --> 03:24.380 So I'll take my rock mesh and I'll set its scale to. 03:24.380 --> 03:26.300 Let's try to. 03:27.710 --> 03:30.590 And we'll try a rock that's twice as big. 03:33.310 --> 03:37.360 Now that looks comically big, so we'll zero in on a good size. 03:37.360 --> 03:41.350 Let's do 1.25. 03:43.570 --> 03:46.000 That might work a little bit better. 03:47.120 --> 03:50.090 I think that's a pretty good size for a Slingshot rock. 03:50.210 --> 03:56.280 Now, in addition to that, we could just make it easier to see by going into that rocks material. 03:56.300 --> 03:58.130 So why don't we do that? 03:58.130 --> 04:04.580 I'm going to browse to Slingshot Rock, open that material, and we could give this a little bit of 04:04.580 --> 04:08.240 some emissive ness and emissive color of sorts. 04:08.240 --> 04:11.660 We could even make it emissive closer to the edges. 04:12.050 --> 04:19.790 I'm going to go ahead and find my slingshot rock static mesh, select it, and then choose to use that 04:19.790 --> 04:21.770 as my preview mesh here. 04:22.010 --> 04:25.150 And I'm going to right click and type for now. 04:25.550 --> 04:25.720 E. 04:25.730 --> 04:27.410 S n l. 04:27.650 --> 04:32.810 This is a nice effect that gives us some kind of glowing edges a bit. 04:32.810 --> 04:38.690 And if I drag that into a miss of color, then now our rock has some glowing edges. 04:38.690 --> 04:44.480 Kind of a nice, easy little trick you can do to make things a little bit easier to see. 04:45.570 --> 04:50.480 Of course, you have to be careful because if it's a white background, it makes it even harder to see. 04:50.490 --> 04:54.300 So it's really up to you, but we can try that also. 04:54.300 --> 04:56.760 I don't think I even applied that material. 04:56.760 --> 04:58.650 Let's try after applying it. 04:59.100 --> 05:04.950 So yeah, it's a little bit probably even harder to see, but we can take that for now and multiply 05:04.950 --> 05:06.180 by a color. 05:06.180 --> 05:14.100 So using a multiply node, I can press three and hook that up and that's a three dimensional color. 05:14.100 --> 05:18.630 We could give it a little bit of a more yellowish or gold color if we like. 05:20.970 --> 05:23.160 And hook that up to the emissive color. 05:23.190 --> 05:25.140 Make it a little bit golden. 05:25.140 --> 05:25.830 Sort of. 05:27.430 --> 05:29.430 And see how that looks. 05:29.440 --> 05:33.940 It's a little bit a little bit easier to see a little bit. 05:34.060 --> 05:41.380 Now, we can also overdrive the color if we wanted to do that by multiplying it by a scalar. 05:41.380 --> 05:47.260 So say 2000 would be a very extreme example of this, right? 05:47.260 --> 05:52.210 So that's going to definitely make it easier to see if we apply and try this out. 05:52.300 --> 05:56.860 But we don't really necessarily want a red hot rock, do we? 05:56.860 --> 06:00.400 But, you know, you could find some kind of balance, right? 06:00.400 --> 06:05.380 You can set this to 500, for example, maybe even 100. 06:05.530 --> 06:07.120 That might even be too much. 06:07.120 --> 06:12.580 You could try 50, maybe 20, maybe even just five. 06:14.430 --> 06:15.240 It's up to you. 06:15.240 --> 06:17.610 But these are just some little tricks you can use. 06:17.640 --> 06:20.610 Five makes it not quite enough, I think. 06:21.060 --> 06:22.750 So find that balance. 06:22.770 --> 06:24.420 Find the color you want as well. 06:24.420 --> 06:27.450 So this can be a sort of brownish color if you want. 06:30.570 --> 06:32.220 So something like that. 06:33.920 --> 06:40.580 And of course, as we get our level in place, then it's going to look even better if we're in a darker 06:40.580 --> 06:41.270 environment. 06:41.270 --> 06:45.560 So if I come over here into the shade, see if I can even. 06:46.350 --> 06:47.730 Get shot at here. 06:47.970 --> 06:48.480 Yep. 06:48.480 --> 06:49.260 There it was. 06:49.260 --> 06:52.290 You could see it a little bit better in the shade, so. 06:53.960 --> 06:55.460 Little tricks you can do. 06:55.610 --> 06:58.040 I'm going to change the exponent a bit. 07:12.370 --> 07:18.850 We'll go up to about 20 and 0.01 for that base reflect fraction. 07:18.850 --> 07:25.690 So that way we'll get more on the edges, less on the inside like so and I'll just go ahead and just 07:25.960 --> 07:33.580 play with that color a little bit, maybe make it a little red ish until I get something that looks 07:33.580 --> 07:38.050 a little easier to see, but I don't want it to be too crazy. 07:43.070 --> 07:44.420 Think I'm okay with that. 07:44.900 --> 07:45.890 Okay, cool. 07:46.250 --> 07:48.490 Now for the random spin. 07:48.500 --> 07:50.780 We could do this in a number of ways. 07:50.870 --> 07:58.870 I'm simply going to create a yaw pitch and roll and get a random float and set those and begin play. 07:58.880 --> 08:03.590 So what I'd like to do is use random float in range. 08:04.880 --> 08:13.280 And we'll go from -360 to positive 360 and promote this to a variable. 08:13.280 --> 08:17.500 And I'll call this your rotation rate. 08:17.510 --> 08:22.580 In fact, if this is a rotation rate, we don't have to stick to 360. 08:22.670 --> 08:29.480 I'm going to go from -500 to positive 500 and I'm going to promote this to another variable and call 08:29.480 --> 08:38.780 this pitch rotation rate and promote this to another variable and call it roll rotation rate. 08:40.300 --> 08:44.890 So we'll go ahead and set these all three and begin play. 08:46.940 --> 08:51.410 And I'm just going to add a local rotation to the rock here in Tick. 08:51.410 --> 08:55.670 So add local rotation, we'll use the rock mesh. 08:58.540 --> 09:06.850 And for delta rotation, we'll just multiply delta seconds by each of our rotation rates. 09:06.850 --> 09:11.770 So I'll just go ahead and get them all out here and multiply each of them. 09:11.770 --> 09:13.420 So multiply. 09:16.000 --> 09:20.680 We'll multiply the first rotation rate by that. 09:20.680 --> 09:27.870 And for Delta rotation, it's a rotator, but I'm going to split the struct pin and use this first one 09:27.880 --> 09:31.750 your that's going to go into delta rotation. 09:31.750 --> 09:37.720 Your it doesn't really matter which one is which here, but I'm going to do the same for the other two. 09:37.720 --> 09:46.480 Pitch rotation rate will be multiplied by delta seconds that will go into the pitch and roll rotation 09:46.480 --> 09:49.330 rate also multiplied by delta seconds. 09:49.360 --> 09:53.230 That will go into Delta rotation roll. 09:53.380 --> 10:01.030 And if we like, we can order these so we don't have too much crisscrossing going on. 10:01.950 --> 10:06.930 We're going to have some, but I can eliminate the criss crossing here. 10:07.520 --> 10:08.900 Like so. 10:09.880 --> 10:15.040 And with that, we have a rock that will rotate randomly. 10:15.160 --> 10:19.090 And of course, it's so small that you probably won't notice it. 10:19.090 --> 10:20.320 So it may be worth it. 10:20.320 --> 10:21.670 Just not taking it all. 10:21.670 --> 10:22.990 But there we go. 10:23.020 --> 10:25.600 We have a random rotation to the rock. 10:26.200 --> 10:26.650 Okay. 10:26.650 --> 10:32.770 Now the last thing I'd like to take care of is these rocks are hurting other enemies. 10:32.770 --> 10:38.470 We want those rocks to just ignore all the enemies and go straight to aura. 10:38.470 --> 10:42.160 But I don't want to just check for aura. 10:42.190 --> 10:49.960 I want to make sure that it's not trying to hurt something if it's friendly to that particular objects 10:49.960 --> 10:51.400 team, so to speak. 10:51.400 --> 10:57.030 In other words, we should use our aura ability system library function. 10:57.040 --> 10:58.270 Where is it? 10:58.300 --> 11:00.010 It's called is not friend. 11:00.040 --> 11:06.520 We should check that and I'm going to check that in our aura projectile as it overlaps. 11:06.520 --> 11:12.710 So we're going to go to Aura Projectile and go down to the on sphere overlap and we're going to check 11:12.710 --> 11:13.520 that right away. 11:13.550 --> 11:20.780 We're going to check if you aura ability system library is not friend. 11:21.760 --> 11:23.760 We want this to be true. 11:23.770 --> 11:27.880 Otherwise we should not do anything on sphere overlap. 11:27.910 --> 11:36.100 Now we need to pass in the effect causer that we can get from our damage effect spec handle like we 11:36.100 --> 11:37.030 did up here. 11:37.060 --> 11:42.010 We're making sure that the thing overlapped is not the effect causer here. 11:42.040 --> 11:46.930 We can also get the avatar from the effect context, can't we? 11:46.960 --> 11:48.700 So there are multiple ways. 11:48.700 --> 11:50.620 I'm just going to use the effect causer. 11:50.890 --> 11:53.650 We're going to pass that in as the first actor. 11:54.480 --> 11:57.450 The second actor is going to be the other actor. 11:57.480 --> 11:59.160 The actor being overlapped. 12:01.440 --> 12:05.610 Now we want is not friend to be false. 12:06.200 --> 12:09.750 If we want to return, we want it to be true. 12:09.770 --> 12:15.800 If we want to cause damage and do everything else now, yes, we're using this damage effect spec handle 12:15.800 --> 12:23.390 data, but we're checking that pointer before and returning early before that so we can use it safely 12:23.390 --> 12:24.050 here. 12:24.320 --> 12:28.880 So if is not friend is false, then we'll just return. 12:28.880 --> 12:33.950 And this should prevent any enemies from damaging each other with projectiles. 12:33.950 --> 12:40.280 So let's go ahead and just launch again and make sure those slingshot enemies are not hitting each other 12:40.280 --> 12:41.750 with their rocks. 12:41.780 --> 12:46.730 And in turn, we can also make sure that Ora can damage the enemies. 12:46.850 --> 12:54.950 And keep in mind, this is now going to prevent PvP because now Ora cannot damage other auras because 12:54.950 --> 12:56.660 they're both going to be players. 12:56.990 --> 13:01.470 So just something to keep in mind, but let's try this out. 13:01.490 --> 13:02.960 Yes, we can damage enemies. 13:02.960 --> 13:04.070 Can enemies damage us? 13:04.070 --> 13:05.180 They can. 13:05.330 --> 13:06.930 Are they damaging each other? 13:06.960 --> 13:08.700 No, they are not. 13:08.700 --> 13:10.710 And that is perfect. 13:10.950 --> 13:11.580 All right. 13:11.580 --> 13:16.260 And I'm also noticing that those rocks are kind of flying a little bit low. 13:16.350 --> 13:20.640 They're hitting the ground before they reach Ora in some cases. 13:20.640 --> 13:27.930 So it is possible that we may wish to have some kind of a pitch override for that initial direction 13:27.930 --> 13:31.920 for spawning the projectile here in ora projectile spell. 13:31.920 --> 13:34.580 So that's something to also keep in mind. 13:34.590 --> 13:39.780 We may wish to angle that projectile upward a bit in the case that it's using gravity. 13:39.780 --> 13:43.050 So we'll get to those fine tweaks as well. 13:43.080 --> 13:48.270 But for now, we know that our slingshot enemies are firing projectiles. 13:48.270 --> 13:49.650 This is looking great. 13:49.680 --> 13:56.910 The only thing left is to make that slingshot actually stretch and look like a real slingshot should 13:56.910 --> 13:59.580 when enemies are shooting. 13:59.820 --> 14:00.860 Excellent job. 14:00.870 --> 14:03.000 I'll see you in the next video.