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These are the user uploaded subtitles that are being translated: 1 1 00:00:00,000 --> 00:00:04,057 [MUSIC] 2 2 00:00:04,057 --> 00:00:07,895 In this video, we're gonna give ourselves a way to have our waves loop over, and 3 3 00:00:07,895 --> 00:00:08,751 over, and over. 4 4 00:00:08,751 --> 00:00:12,232 So even if you have only two ways, and I'm gonna change my to two here, 5 5 00:00:12,232 --> 00:00:16,362 it just goes wave one, wave two, wave one, wave two, over, and over, and over so 6 6 00:00:16,362 --> 00:00:17,552 that our game can loop. 7 7 00:00:17,552 --> 00:00:21,841 So we'll hop over into EnemeySpawner.cs, create ourselves a variable. 8 8 00:00:21,841 --> 00:00:24,377 So we'll serialize this, so it's available in the inspector. 9 9 00:00:24,377 --> 00:00:28,019 We're making a bool, so it's either gonna be either true or it's gonna be false and 10 10 00:00:28,019 --> 00:00:29,113 we'll call it looping. 11 11 00:00:29,113 --> 00:00:33,839 So I have a bool called looping, which we will initialize as false. 12 12 00:00:33,839 --> 00:00:37,951 So bool looping = false;. 13 13 00:00:37,951 --> 00:00:41,889 And then within our start method here's something really cool. 14 14 00:00:41,889 --> 00:00:48,389 We're we can say we can change the type of return value for our start method. 15 15 00:00:48,389 --> 00:00:53,972 So that when the engine calls start, it is doing something a little bit different, 16 16 00:00:53,972 --> 00:00:56,364 we can change it to an IEnumerator, 17 17 00:00:56,364 --> 00:01:00,696 so that we make our start a code routine, which is really nifty. 18 18 00:01:00,696 --> 00:01:02,520 And then within our StartCoroutine, 19 19 00:01:02,520 --> 00:01:04,803 just gonna put my curly braces down a line here. 20 20 00:01:04,803 --> 00:01:09,553 So within our StartCoroutine we can create a do while loop, 21 21 00:01:09,553 --> 00:01:14,686 which basically means it goes over and over and over at do while. 22 22 00:01:14,686 --> 00:01:17,028 And we'll make it while looping is true. 23 23 00:01:17,028 --> 00:01:21,391 So we'll give ourselves a little bit of room here and start by typing do. 24 24 00:01:21,391 --> 00:01:24,897 And then give ourselves a code block in here of curly braces. 25 25 00:01:24,897 --> 00:01:29,763 We're going to change our stock StockCoroutines inot our yield conditions. 26 26 00:01:29,763 --> 00:01:36,001 So yield return StartCoroutine SpawnAllWaves. 27 27 00:01:36,001 --> 00:01:38,399 So this now becomes the yield condition. 28 28 00:01:38,399 --> 00:01:43,581 Once we get into the do while loop, we're saying do a thing, go, go, go, go, go. 29 29 00:01:43,581 --> 00:01:45,941 And then, once it's finished doing all this, 30 30 00:01:45,941 --> 00:01:48,777 the yield will then return back within our start method. 31 31 00:01:48,777 --> 00:01:55,245 And we can say, close our, curly braces here, so we've got our yield condition. 32 32 00:01:55,245 --> 00:01:58,007 And then we can say, While (looping). 33 33 00:01:58,007 --> 00:02:00,625 And this is another way of saying While (looping) equals true. 34 34 00:02:00,625 --> 00:02:03,160 We can say while, and then in brackets, looping. 35 35 00:02:03,160 --> 00:02:07,103 So what we're doing here is saying when the engine call start, do this thing, 36 36 00:02:07,103 --> 00:02:08,439 start the co-routines. 37 37 00:02:08,439 --> 00:02:10,767 This is a series co-routine. 38 38 00:02:10,767 --> 00:02:12,283 And we are gonna yield. 39 39 00:02:12,283 --> 00:02:13,917 So come back to start and 40 40 00:02:13,917 --> 00:02:18,994 continue with whatever is after this statement once this has completed. 41 41 00:02:18,994 --> 00:02:20,947 So once this completed, we come back here. 42 42 00:02:20,947 --> 00:02:22,260 We see the while. 43 43 00:02:22,260 --> 00:02:25,717 If looping is true, then it jumps back up to the do and 44 44 00:02:25,717 --> 00:02:27,771 it starts this all over again. 45 45 00:02:27,771 --> 00:02:31,611 And because it started as part of the yield, then it waits until it's finished, 46 46 00:02:31,611 --> 00:02:33,146 then it comes back to the while. 47 47 00:02:33,146 --> 00:02:34,660 So this is a really neat loop and 48 48 00:02:34,660 --> 00:02:38,915 a really neat way of saying we can do this particular thing here, this SpawnAllWaves, 49 49 00:02:38,915 --> 00:02:42,146 we can do it over, and over, and over, so we can loop it in there. 50 50 00:02:42,146 --> 00:02:45,336 So we'll save this up and hop over into Unity, check that it all worked. 51 51 00:02:45,336 --> 00:02:47,912 The first thing we need to do is click On for Looping. 52 52 00:02:47,912 --> 00:02:51,350 So let's check it without looping on, and make sure it's working as we're expecting. 53 53 00:02:51,350 --> 00:02:53,907 You might wanna stop at the end of a number of waves, and 54 54 00:02:53,907 --> 00:02:57,314 then the player can go on to another level, so you don't want it to loop. 55 55 00:02:57,314 --> 00:02:59,045 Okay, that's it without looping. 56 56 00:02:59,045 --> 00:03:01,973 We'll click Looping On, click on Play, and 57 57 00:03:01,973 --> 00:03:05,064 we should see these waves looped over and over. 58 58 00:03:05,064 --> 00:03:09,186 Okay, once, twice, okay, so you can see, they just keep getting spawned, 59 59 00:03:09,186 --> 00:03:10,691 and spawned, and spawned. 60 60 00:03:10,691 --> 00:03:13,940 And so you can imagine, this is a game, if we're spawning all these waves, and 61 61 00:03:13,940 --> 00:03:15,249 the game is just going on and on, 62 62 00:03:15,249 --> 00:03:17,893 you don't have to have to have created 300 different waves. 63 63 00:03:17,893 --> 00:03:22,411 You can create a certain number 10 or 20 or 30 and the game will go on and 64 64 00:03:22,411 --> 00:03:23,219 on forever. 65 65 00:03:23,219 --> 00:03:27,395 And if you make your enemies engaging, if you make your waves interesting and 66 66 00:03:27,395 --> 00:03:30,992 all that kind of good stuff then the player is gonna feel like this is 67 67 00:03:30,992 --> 00:03:33,642 a pretty awesome game to play for a bunch of time. 68 68 00:03:33,642 --> 00:03:37,587 Okay, so it's just a quick lecture on the do while loop and 69 69 00:03:37,587 --> 00:03:42,335 how we have used that within our co-routine and how we have changed our 70 70 00:03:42,335 --> 00:03:47,188 Start method to be an IEnumerator so that we can use it as a co-routine. 71 71 00:03:47,188 --> 00:03:50,803 Great work, well done, I'm sure you're game is shaping up really nicely. 72 72 00:03:50,803 --> 00:03:53,558 I look forward you seeing your sharing in the community. 73 73 00:03:53,558 --> 00:03:56,390 If you've got something neat that you're enjoying with your waves, 74 74 00:03:56,390 --> 00:03:59,230 then please do share it with us, and I'll see you in the next lecture. 7537