WEBVTT 00:00.020 --> 00:00.500 Hello guys. 00:00.500 --> 00:01.400 Welcome to the video. 00:01.400 --> 00:04.370 In this one we need to fix one of the bugs we have for a while. 00:04.370 --> 00:09.080 And I've been ignoring it for a while, but it just, you know, I did not have a great chance to fix 00:09.080 --> 00:09.170 it. 00:09.170 --> 00:11.120 But now we have an amazing chance. 00:11.120 --> 00:16.250 Because now I can show you what is, uh, event action and how to use it. 00:16.250 --> 00:20.810 It's a very nice feature that is very convenient, and it can be pretty useful if you use it. 00:20.810 --> 00:21.470 Right. 00:21.470 --> 00:26.870 So first of all, I want to show you a debug that we have on the prefab of a player manager. 00:27.470 --> 00:34.220 I'm going to set respawn delay to 1.5 seconds and let me drop another enemy on the scene. 00:34.220 --> 00:37.160 I'm going to take this chicken and I'm going to place it over here. 00:37.640 --> 00:39.410 So now I'm going to go to play mode. 00:39.410 --> 00:44.870 And once I die, you'll see that we have an error that says that we don't have access to the player 00:44.870 --> 00:46.850 transform over here. 00:46.850 --> 00:49.100 Missing reference exception. 00:49.100 --> 00:55.130 This happens because we try to get access to the player transform on the player manager, and at the 00:55.130 --> 01:01.880 moment when we kill the player, the player is dead and we do not have anything on the player manager 01:01.880 --> 01:02.660 field. 01:03.080 --> 01:03.200 Uh. 01:03.200 --> 01:04.220 Over here. 01:05.370 --> 01:07.020 You can see we have it now. 01:07.020 --> 01:09.720 But if I die, it says missing. 01:09.750 --> 01:10.260 Sorry. 01:10.260 --> 01:11.100 Once again. 01:16.080 --> 01:19.380 You can see it says missing and that's why we see an error. 01:19.380 --> 01:20.670 So we need to fix it. 01:20.670 --> 01:24.150 And there is a very simple and convenient way to fix it. 01:24.150 --> 01:26.010 Now let's go to the scripts. 01:28.230 --> 01:29.190 Enemy chicken. 01:29.850 --> 01:32.730 And we're going to go ahead. 01:34.630 --> 01:39.760 To, uh, Layer manager one second. 01:40.330 --> 01:41.590 Layer manager. 01:41.590 --> 01:49.000 And at the top over here I want to make a public static event action. 01:50.210 --> 01:54.170 And I'm going to name it as on layer respawn. 01:54.680 --> 01:59.900 So now we've made an action and we can invoke it every time we respawn the player. 01:59.900 --> 02:01.280 That's the first step. 02:01.990 --> 02:05.470 Let's go here at the place where we respawn the player. 02:06.810 --> 02:08.340 On player respawn. 02:08.340 --> 02:10.110 Question mark Doh't. 02:10.110 --> 02:10.950 Invoke. 02:11.570 --> 02:15.590 So now this will be invoked every time we respawn the player. 02:15.590 --> 02:18.830 And also now we can subscribe to this event. 02:18.830 --> 02:22.640 And every time it is invoked we can do something else. 02:22.640 --> 02:26.420 It's like we sort of attaching another method to this event. 02:26.420 --> 02:32.390 And every time this event is invoked, we're going to also call that method that is attached to this 02:32.390 --> 02:33.380 event okay. 02:33.380 --> 02:38.840 And I know it's all confusing and maybe have lots of questions, but in general it's just like that. 02:38.840 --> 02:39.680 That's how you use it. 02:39.680 --> 02:41.270 And it's very simple to deal with. 02:41.270 --> 02:45.770 You make an action, then you go and invoke it at the place you want it to invoke. 02:45.770 --> 02:52.490 For example, we want this event to happen every time we respawn the player, just like we did here 02:52.490 --> 02:53.330 and now. 02:53.330 --> 02:59.960 Every time this will be invoked, all of the, uh, methods that we subscribe to this event will be 02:59.960 --> 03:00.410 called. 03:00.410 --> 03:04.010 So let's go to, uh, enemy over here. 03:04.720 --> 03:07.960 And we have this method update player ref. 03:07.960 --> 03:10.630 So what we can do here is go to start. 03:11.730 --> 03:20.430 And we're going to do player manager on player respawn plus equals update players ref just like that. 03:20.430 --> 03:27.570 And maybe let's rename it to Update players update player reference just a little bit better. 03:28.110 --> 03:33.750 Now we don't need to do invoke repeating, because this will be called every time we invoke that event. 03:33.750 --> 03:38.640 And maybe we want to unsubscribe from the event every time enemy dies. 03:38.640 --> 03:47.850 So somewhere here I'm going to do player manager on player respawn minus equals update player reference. 03:48.300 --> 03:48.900 All right. 03:48.900 --> 03:49.620 Very good. 03:49.620 --> 03:51.270 That's all what we need to do. 03:51.270 --> 03:53.220 Now let's go back to unity. 03:54.430 --> 03:57.340 And, uh, we're going to go to play mode. 04:06.000 --> 04:06.630 Q. 04:07.990 --> 04:12.400 Going to get some fruits and we have a player manager reference here. 04:12.400 --> 04:16.240 But if I jump into the gap, I'm going to kill the player. 04:16.240 --> 04:21.310 It's going to say missing, but we do not have any errors in here at the moment. 04:21.550 --> 04:24.700 If we go to debug mode on the enemy chicken. 04:28.930 --> 04:31.150 We can see that player transform. 04:31.150 --> 04:32.350 Says none. 04:32.380 --> 04:34.480 Now let's unpause the game. 04:34.630 --> 04:40.900 I'm going to respond and we can see player chicken now has reference of a player clone transform, which 04:40.900 --> 04:45.820 is this one and same reference we have on the player manager over here. 04:45.850 --> 04:46.750 Isn't it great? 04:46.750 --> 04:51.880 It is great and probably I should do it like that in the first place. 04:51.880 --> 04:56.830 But I didn't because sometimes, you know, like my brain is not working. 04:56.830 --> 04:57.550 So yeah. 04:57.550 --> 04:59.440 Thank you so much for paying attention. 04:59.440 --> 05:01.150 That's all what I wanted to do in this video. 05:01.150 --> 05:03.370 Just a quick example on how to use action events. 05:03.370 --> 05:05.950 And let me know if you want to know more about action events. 05:05.950 --> 05:11.950 Maybe I can make some video for that and I will explain things in details, but as of now, we don't 05:11.950 --> 05:13.150 need to know much about them. 05:13.150 --> 05:18.010 We can just use this simple example because we don't really need other functionality from them. 05:18.010 --> 05:20.200 Okay, well see you in the next video.