1 00:00:04,330 --> 00:00:05,200 ‫Hello and welcome. 2 00:00:05,200 --> 00:00:11,590 ‫In this lecture, we're going to be adding an impact particle effect to wherever we hit with our rifle. 3 00:00:11,590 --> 00:00:14,050 ‫So let's dive in and see how it's done. 4 00:00:14,910 --> 00:00:18,510 ‫So this is going to be a quick one because we want to do something that we've already done before, 5 00:00:18,510 --> 00:00:22,710 ‫which is spawn particle effects that aren't attached. 6 00:00:22,770 --> 00:00:28,980 ‫Now we know that this is going to be using the new gameplay statics again, and let's go ahead and open 7 00:00:28,980 --> 00:00:30,490 ‫up that header file. 8 00:00:30,510 --> 00:00:41,100 ‫So gameplay static H and we want to search for the spawn emitter within here. 9 00:00:41,280 --> 00:00:47,580 ‫The symbol search isn't always reliable, so I'm going to just do a search spawn emitter. 10 00:00:48,490 --> 00:00:53,260 ‫And we are looking for the other versions of this spawn emitter at location. 11 00:00:53,260 --> 00:00:54,580 ‫That's the one we want. 12 00:00:55,090 --> 00:01:02,170 ‫And what we're going to do is it's going to need the world, the particle system, a location and a 13 00:01:02,170 --> 00:01:03,490 ‫rotation. 14 00:01:03,850 --> 00:01:08,230 ‫You could go with a zero rotation, but we actually want a rotation. 15 00:01:08,320 --> 00:01:11,970 ‫So let's go over to the game, to the gun, C++, rather. 16 00:01:11,980 --> 00:01:16,450 ‫And we're going to use this spawn emitter at location to a get world. 17 00:01:17,540 --> 00:01:23,000 ‫In here, and then we are going to give it a particle system. 18 00:01:23,000 --> 00:01:25,070 ‫So we need to go ahead and set one up. 19 00:01:25,070 --> 00:01:29,810 ‫I'm going to leave that blank as a to do for you, seeing as we already know how to set up particle 20 00:01:29,810 --> 00:01:35,570 ‫systems and then what we're going to do, we're going to get the location that's fairly straightforward. 21 00:01:35,570 --> 00:01:37,370 ‫That's going to be the hit location, isn't it? 22 00:01:37,580 --> 00:01:41,450 ‫And then the next thing, let me get my spacing right there. 23 00:01:41,900 --> 00:01:45,440 ‫Then the next thing is going to be the rotation. 24 00:01:45,440 --> 00:01:47,390 ‫Now this is slightly more complicated. 25 00:01:47,480 --> 00:01:54,080 ‫Now the first thing we're going to do is we're going to create a vector for the shot direction, which 26 00:01:54,080 --> 00:01:56,690 ‫is going to show us where the shot was coming from. 27 00:01:56,690 --> 00:02:01,520 ‫And this one is fairly straightforward because we've already got the direction it's going in. 28 00:02:01,520 --> 00:02:05,090 ‫So where it's coming from is just going to be the negative of this. 29 00:02:05,090 --> 00:02:09,050 ‫So minus rotation vector is going to give us the shot direction. 30 00:02:09,050 --> 00:02:10,970 ‫Where was that shot coming from? 31 00:02:10,970 --> 00:02:13,970 ‫And that's going to be useful when we're applying damage later as well. 32 00:02:14,210 --> 00:02:15,410 ‫So shot direction. 33 00:02:15,410 --> 00:02:15,950 ‫Cool. 34 00:02:15,950 --> 00:02:16,490 ‫Great. 35 00:02:16,490 --> 00:02:19,670 ‫And what we want in here is a rotator. 36 00:02:19,670 --> 00:02:28,460 ‫So you can get a rotator from a vector in C++ just by doing dot rotation like so. 37 00:02:28,850 --> 00:02:31,970 ‫And that should be enough so we can put a semicolon on the end of the line. 38 00:02:31,970 --> 00:02:40,730 ‫So all that remains is a mini challenge for you to fill out this particle system with something that 39 00:02:40,730 --> 00:02:42,830 ‫we can configure in Blueprint. 40 00:02:43,750 --> 00:02:43,910 ‫Okay. 41 00:02:43,990 --> 00:02:44,640 ‫Welcome back. 42 00:02:44,650 --> 00:02:47,650 ‫So we're going to essentially do what we did with the muzzle flash. 43 00:02:47,650 --> 00:02:49,000 ‫So I'm going to copy that. 44 00:02:49,000 --> 00:02:53,830 ‫You property here instead of the muzzle flash, we're going to have the impact effect. 45 00:02:55,030 --> 00:03:01,150 ‫Like so and we're going to use that in your gameplay. 46 00:03:01,150 --> 00:03:02,860 ‫Static spawn emitter at location. 47 00:03:02,860 --> 00:03:03,460 ‫Cool. 48 00:03:03,460 --> 00:03:09,730 ‫We're going to remove the draw debug point and we're going to have a go at compiling and playing. 49 00:03:10,520 --> 00:03:15,770 ‫Once you've got that to compile successfully, we are going to go over to the content browser, open 50 00:03:15,770 --> 00:03:21,780 ‫up our BP rifle because we need to attach a impact effect. 51 00:03:21,800 --> 00:03:23,840 ‫Let's open up the full blueprint editor. 52 00:03:23,870 --> 00:03:24,890 ‫Go to class defaults. 53 00:03:24,890 --> 00:03:26,490 ‫Details impact effect. 54 00:03:26,510 --> 00:03:27,140 ‫Let's look. 55 00:03:27,170 --> 00:03:28,850 ‫See what we can find. 56 00:03:28,850 --> 00:03:29,870 ‫Impact. 57 00:03:29,900 --> 00:03:30,920 ‫See if we've got something. 58 00:03:30,920 --> 00:03:32,120 ‫There I am. 59 00:03:33,560 --> 00:03:33,970 ‫Nope. 60 00:03:33,980 --> 00:03:35,450 ‫No, I am either. 61 00:03:35,450 --> 00:03:38,340 ‫Maybe it's going to be called hit logo. 62 00:03:38,460 --> 00:03:41,840 ‫We've got a Dre Wraith drone hit world. 63 00:03:41,850 --> 00:03:48,380 ‫We've got a few different things down here and I think we can also choose some stuff from the shooter 64 00:03:48,380 --> 00:03:49,310 ‫game asset pack. 65 00:03:49,310 --> 00:03:55,100 ‫So if we go back to the content browser, asset packs, shooter game weapons, not weapons, sorry, 66 00:03:55,100 --> 00:04:03,020 ‫the effects and then particle systems and then weapons, assault rifle impacts, who got the eye impact 67 00:04:03,020 --> 00:04:03,920 ‫hit or something. 68 00:04:03,920 --> 00:04:06,560 ‫So we can I think I'm going to be using that one. 69 00:04:06,740 --> 00:04:10,430 ‫So I see what I'm going to search for assault rifle. 70 00:04:10,520 --> 00:04:12,050 ‫That will be my impact effect. 71 00:04:12,050 --> 00:04:13,910 ‫I quite liked that one in testing. 72 00:04:13,910 --> 00:04:20,920 ‫So we're going to go alt p, but you can try out the other impact effects and try and hit a wall. 73 00:04:20,930 --> 00:04:21,260 ‫There you go. 74 00:04:21,260 --> 00:04:25,850 ‫When I hit the wall, you can see the impact effect being spawned off of it. 75 00:04:25,850 --> 00:04:28,070 ‫So I'm very happy with that result. 76 00:04:28,460 --> 00:04:34,400 ‫And the next lecture, we're going to be dealing damage to actors that we place around the world. 77 00:04:34,400 --> 00:04:35,120 ‫Very exciting. 78 00:04:35,120 --> 00:04:36,470 ‫So I will see you there.