WEBVTT 00:07.210 --> 00:08.200 Welcome back. 00:08.200 --> 00:13.840 Now, even though our game is programmed for multiplayer, our save game is single player. 00:13.840 --> 00:20.200 And for that reason, I'd like to just place a couple of safeguards in place for anyone who's launching 00:20.200 --> 00:26.620 this project up, brings it up in the Pi, and goes ahead and sets the number of players to two and 00:26.620 --> 00:27.730 presses play. 00:27.730 --> 00:35.020 And of course, this isn't going to be a problem unless we load up our single player solution for loading, 00:35.020 --> 00:35.620 right? 00:35.890 --> 00:42.580 I don't want anyone to be able to select a slot right here on the client and press play. 00:42.580 --> 00:48.460 I want to force that person to just play in single player mode. 00:48.460 --> 00:54.850 So for the select slot button, I'm going to prevent anything from happening as well as making the quit 00:54.850 --> 00:56.920 button here on a client. 00:56.920 --> 01:02.530 Quit the game because if I quit and go back to this menu and press play, then I'm going to see some 01:02.530 --> 01:04.210 information here again. 01:04.210 --> 01:05.650 So here's what I'm going to do. 01:05.650 --> 01:08.800 I'm going to go into my C plus plus project. 01:08.800 --> 01:15.880 I'm going to close all tabs, but I'm going to go to UI actually in the private folder into ViewModel, 01:15.880 --> 01:18.430 into MVVM load screen. 01:18.730 --> 01:24.970 So the first thing I'm going to look for here in MVVM load screen is load data. 01:25.390 --> 01:30.640 And on the client or a game mode isn't going to be valid. 01:31.150 --> 01:33.790 So I'm going to first place a check here. 01:33.790 --> 01:40.210 If not is valid or a game mode will return. 01:40.210 --> 01:47.380 In this case, the next thing I want to do is look for new slot button pressed, as I don't want to 01:47.380 --> 01:53.170 be able to make a new slot if or a game mode isn't valid here as well. 01:53.170 --> 02:01.630 So what I'm going to do is place another if check if not is valid or a game mode. 02:01.630 --> 02:06.340 And in this case I'd like to add an on screen debug message. 02:06.340 --> 02:07.960 I'm going to say G engine. 02:10.660 --> 02:17.680 Add on screen debug message I'll use one for the key, 15 seconds for the time for the color. 02:17.680 --> 02:20.530 Let's make this pretty magenta will do. 02:20.530 --> 02:24.100 And for the F string I'm going to say. 02:25.360 --> 02:29.140 Please switch to single player. 02:30.810 --> 02:37.260 So at least the user will know why it's not working and they'll be instructed how to make it work. 02:37.470 --> 02:38.940 And we'll return here. 02:39.390 --> 02:41.190 So let's see how this works. 02:44.830 --> 02:47.710 I'll go ahead and just go to the load menu. 02:48.040 --> 02:50.740 And first I'm going to try it with one player. 02:50.740 --> 02:54.940 Make sure we can enter a new name, create a new slot and play. 02:54.940 --> 02:56.620 Everything works fine. 02:58.980 --> 03:01.290 I can select an old slot and play that. 03:01.290 --> 03:03.090 Everything looks fine. 03:04.390 --> 03:07.210 Of course I'm going to have to fix that up, but that's cool. 03:07.630 --> 03:08.980 Things are working. 03:10.150 --> 03:13.900 Now I'm going to set the number of players to two and it looks like we're standalone. 03:13.900 --> 03:16.360 So I'm going to set it to play as listen server. 03:17.070 --> 03:18.960 And see what happens on the client. 03:18.990 --> 03:20.370 Now here's what happens. 03:20.370 --> 03:26.670 And even though I can click the plus, if I click new slot I see, please switch to single player so 03:26.670 --> 03:29.100 we can't click on a new slot. 03:29.130 --> 03:34.350 However, if we quit and then press play, then we're loading things up. 03:34.350 --> 03:39.030 So we need to make this quit button make us exit the game. 03:39.030 --> 03:40.020 That's what I'd like to do. 03:40.020 --> 03:43.170 So I'm going to go into my blueprints. 03:43.810 --> 03:49.930 Into UI load menu and open Wbhp load screen. 03:49.930 --> 03:52.960 I'm interested in my quit button here. 03:53.550 --> 03:54.870 So here's my quit button. 03:54.870 --> 04:01.320 What we're doing is we're opening a level, but I don't want to do that if we're on a client. 04:01.320 --> 04:04.440 So what I'm going to do is get the game mode. 04:05.000 --> 04:08.540 With get game mode and I'm going to check is valid here. 04:12.100 --> 04:13.690 And if it's valid. 04:13.690 --> 04:16.510 All right, we'll go ahead and open that level. 04:16.510 --> 04:19.960 If it's not valid, I'd like to quit the game. 04:20.320 --> 04:23.110 So we're going to call quit game. 04:24.120 --> 04:25.500 Simple as that. 04:25.740 --> 04:28.560 And with that, I'm going to press play. 04:28.650 --> 04:32.310 And on the client, if I quit, we exit the game. 04:32.400 --> 04:36.990 So now our single player save game solution is enforced. 04:36.990 --> 04:42.030 And if we set this to play as client well that's not going to work. 04:43.600 --> 04:49.810 We have to set this to play as either standalone or listen server with a single player. 04:51.840 --> 04:54.240 And then, of course, it'll work. 04:55.750 --> 04:56.680 Excellent. 04:56.680 --> 04:57.970 I'll see you soon.