1 00:00:04,110 --> 00:00:07,740 ‫In this lecture, we're going to create a C++ class. 2 00:00:07,770 --> 00:00:11,310 ‫Now we need a class that we can use for our pawns. 3 00:00:11,340 --> 00:00:15,720 ‫Now I'm saying pawns, plural, because there will be two different pawns in our game. 4 00:00:15,720 --> 00:00:20,280 ‫There's going to be the tank that we use to roll around the level, and there's going to be a turret 5 00:00:20,280 --> 00:00:24,870 ‫which will be our enemy so we can create a base pawn class. 6 00:00:24,870 --> 00:00:30,050 ‫And this is going to have the basic functionality that both the tank and the turret will share. 7 00:00:30,060 --> 00:00:34,890 ‫And this way we can create our two child classes, the tank and the turret. 8 00:00:34,890 --> 00:00:40,890 ‫So these are going to inherit qualities from the base pawn class and these are things that both pawns 9 00:00:40,890 --> 00:00:47,010 ‫are going to share, such as having the mesh, having a capsule component and the ability to launch 10 00:00:47,010 --> 00:00:47,820 ‫projectiles. 11 00:00:47,820 --> 00:00:51,840 ‫Now, we're going to get into all those features in future videos for this video. 12 00:00:51,840 --> 00:00:56,280 ‫We're just going to create the C++ class and add some basic variables to it. 13 00:00:56,280 --> 00:01:00,990 ‫So this is our motivation for creating our first C++ class. 14 00:01:01,020 --> 00:01:06,450 ‫Now we're ready to start creating some C++ classes for this project. 15 00:01:06,630 --> 00:01:13,410 ‫Now you'll see down here in the content browser that there are no folders for C++ classes. 16 00:01:13,410 --> 00:01:19,770 ‫That's because we haven't created any just yet, but we're about to write now so we can go up to tools 17 00:01:19,770 --> 00:01:22,140 ‫and select new C++ class. 18 00:01:22,140 --> 00:01:27,690 ‫And here is where we're going to choose the parent class for the class that we're going to create. 19 00:01:27,690 --> 00:01:31,740 ‫And by default, we have several options here to choose from. 20 00:01:31,740 --> 00:01:35,330 ‫This is something that you should have seen in previous lectures. 21 00:01:35,330 --> 00:01:38,280 ‫So now we have some decisions to make here. 22 00:01:38,370 --> 00:01:41,550 ‫For one, which parent class are we going to choose? 23 00:01:41,550 --> 00:01:42,210 ‫We have. 24 00:01:42,210 --> 00:01:43,860 ‫The first one is none. 25 00:01:43,860 --> 00:01:50,910 ‫That would basically allow us to create a plain old C++ class, but we're going to need some extra functionality. 26 00:01:50,910 --> 00:01:55,440 ‫For one, we want to be able to place an instance of this object in the world. 27 00:01:55,440 --> 00:01:58,230 ‫So we can't do that with a plain old C++ class. 28 00:01:58,230 --> 00:02:03,810 ‫We could do that with a character or a pawn or an actor, but which one of these is most appropriate 29 00:02:03,810 --> 00:02:05,250 ‫for what we want to do? 30 00:02:05,400 --> 00:02:10,020 ‫Well, we need to take a step back and think about what exactly we're trying to create here. 31 00:02:10,050 --> 00:02:17,460 ‫We're trying to create a tank that we can control and move around the level and shoot projectiles so 32 00:02:17,460 --> 00:02:21,570 ‫that we can cause damage and all that good stuff in our assets folder. 33 00:02:21,570 --> 00:02:28,770 ‫Just to remind us, we have this meshes folder here and we have the tank base and we have the tank turret. 34 00:02:28,800 --> 00:02:32,670 ‫These are two different meshes that are going to be in our class. 35 00:02:32,670 --> 00:02:35,640 ‫And so we need the capability to have meshes. 36 00:02:35,640 --> 00:02:39,270 ‫And so a plain C++ class does not have that ability. 37 00:02:39,540 --> 00:02:41,670 ‫So let's think about this for a second. 38 00:02:41,670 --> 00:02:44,250 ‫What parent class should we use? 39 00:02:44,250 --> 00:02:48,780 ‫Well, the first class that should probably come to your mind is the actor class. 40 00:02:48,780 --> 00:02:52,320 ‫Now, the actor class has the ability to be placed in the world. 41 00:02:52,320 --> 00:02:53,850 ‫So that's a great start. 42 00:02:53,940 --> 00:02:57,750 ‫It also has the ability to have a visual representation. 43 00:02:57,750 --> 00:03:04,080 ‫Whether that's a mesh or anything else, it can actually be seen once you place it in the world, provided 44 00:03:04,080 --> 00:03:07,650 ‫that you give it a mesh or whatever it is that you want to see. 45 00:03:07,650 --> 00:03:13,260 ‫Now derived from actor, we have the -- class and the -- inherits all of those qualities from the 46 00:03:13,260 --> 00:03:19,830 ‫actor class, except it has additional qualities such as the ability to be possessed by a controller. 47 00:03:19,830 --> 00:03:25,980 ‫Now this whole possession thing is something that will go into more detail about later, but for now, 48 00:03:25,980 --> 00:03:30,060 ‫just understand that this means a -- can be controlled by a player. 49 00:03:30,060 --> 00:03:36,750 ‫So if you're pressing a mouse button or a keyboard key, this can be set up and configured so that we 50 00:03:36,750 --> 00:03:38,580 ‫can move the -- around. 51 00:03:38,580 --> 00:03:43,110 ‫So this sounds like something that we would definitely want for our tank. 52 00:03:43,110 --> 00:03:49,410 ‫So by handling movement input, the -- is sounding like a pretty good choice now derived from the 53 00:03:49,410 --> 00:03:55,560 ‫-- class and thus inheriting all the stuff that the -- has, plus all the stuff that the -- inherited 54 00:03:55,560 --> 00:03:56,880 ‫from its parent class. 55 00:03:56,880 --> 00:04:02,100 ‫We have the character class which has some character specific stuff. 56 00:04:02,460 --> 00:04:05,550 ‫For example, it has something called a character movement component. 57 00:04:05,550 --> 00:04:07,830 ‫Now, a -- does not have this. 58 00:04:07,860 --> 00:04:13,980 ‫A character movement component gives the character extra abilities such as different movement modes 59 00:04:13,980 --> 00:04:19,440 ‫like flying and swimming and crouching and other stuff specific to characters. 60 00:04:19,440 --> 00:04:25,560 ‫The character class is good for bipedal characters and it's not going to work very well for non bipedal 61 00:04:25,560 --> 00:04:28,410 ‫characters things that are not creatures with two legs. 62 00:04:28,410 --> 00:04:34,050 ‫And although it would be pretty awesome to have a tank flying around the level and dropping bombs on 63 00:04:34,050 --> 00:04:38,940 ‫everything it sees, we're not going to do quite anything that complicated in this section. 64 00:04:38,940 --> 00:04:41,040 ‫We're just going to make a tank that can roll around. 65 00:04:41,040 --> 00:04:47,220 ‫So we really don't need a character movement component or any of that special character specific stuff. 66 00:04:47,220 --> 00:04:52,380 ‫So for this, I think a -- is perfect for what we're trying to achieve. 67 00:04:52,380 --> 00:04:59,490 ‫So I'm going to challenge you to create a new C++ class, create a class based on --, and name this 68 00:04:59,490 --> 00:05:01,230 ‫new class based --. 69 00:05:01,230 --> 00:05:03,600 ‫Now you can leave all settings as is. 70 00:05:03,670 --> 00:05:05,200 ‫In the class creation wizard. 71 00:05:05,200 --> 00:05:10,570 ‫You don't need to change the file path or anything like that, so pause the video and create your first 72 00:05:10,570 --> 00:05:13,030 ‫C++ class for this project. 73 00:05:16,320 --> 00:05:18,090 ‫So back here in the level. 74 00:05:18,120 --> 00:05:21,690 ‫So let's go up to tools and create new C++ class. 75 00:05:21,690 --> 00:05:24,260 ‫I have not created the C++ class yet. 76 00:05:24,270 --> 00:05:27,180 ‫I just closed out of this to go back to that slide. 77 00:05:27,180 --> 00:05:33,480 ‫But now that I'm back, I'm ready to create my first C++ class for this project and I'm going to choose 78 00:05:33,480 --> 00:05:36,720 ‫-- and you'll see that every time you hover over these. 79 00:05:36,720 --> 00:05:38,370 ‫You've probably seen this before. 80 00:05:38,400 --> 00:05:44,790 ‫We get a tooltip that pops up and it says, -- is the base class of all actors that can be possessed 81 00:05:44,790 --> 00:05:45,660 ‫by players. 82 00:05:45,660 --> 00:05:52,680 ‫Or I know that sounds pretty exciting, but we are going to configure this to be movable by input from 83 00:05:52,680 --> 00:05:53,370 ‫a player. 84 00:05:53,370 --> 00:05:55,380 ‫So this is perfect. 85 00:05:55,470 --> 00:06:01,020 ‫It goes on to say that they are the physical representations of players and creatures in a level. 86 00:06:01,020 --> 00:06:07,080 ‫So in other words, once we create this tank, it's going to represent us as players in the world. 87 00:06:07,080 --> 00:06:07,950 ‫Pretty cool. 88 00:06:08,040 --> 00:06:15,960 ‫So select -- and click next and it's showing us the path where it's going to stick this class in our 89 00:06:15,960 --> 00:06:20,070 ‫project and you'll see that it's in source slash tune tanks. 90 00:06:20,070 --> 00:06:26,280 ‫Now we're going to want to name our new -- because my -- is a horrendous name and it's very vague. 91 00:06:26,280 --> 00:06:29,700 ‫We need something a little bit more specific now. 92 00:06:29,700 --> 00:06:35,400 ‫We're going to plan on using this as a base class, meaning we're going to derive classes from this 93 00:06:35,400 --> 00:06:38,340 ‫class so we can call this base --. 94 00:06:38,340 --> 00:06:43,080 ‫Now, I know that's not much better than my --, but hey, it's telling us that this is a base --. 95 00:06:43,080 --> 00:06:46,770 ‫This is something we're going to derive child classes from in the future. 96 00:06:46,770 --> 00:06:47,730 ‫We'll get to that. 97 00:06:47,730 --> 00:06:52,320 ‫But for now, we're going to call this base -- and we're going to click Create Class. 98 00:06:53,930 --> 00:06:54,590 ‫All right. 99 00:06:54,590 --> 00:06:58,340 ‫So Visual Studio code has opened up for us with our new class. 100 00:06:58,340 --> 00:07:01,700 ‫We have based upon H and based upon CP. 101 00:07:01,730 --> 00:07:08,180 ‫Now we can close this sidebar by clicking the Explorer icon there, and we can take a look at what V's 102 00:07:08,180 --> 00:07:09,890 ‫code has generated for us. 103 00:07:09,890 --> 00:07:16,880 ‫So by default we get the class constructor as well as three functions begin, play, tick and set up 104 00:07:16,880 --> 00:07:18,380 ‫player input component. 105 00:07:18,410 --> 00:07:21,980 ‫Now you should be familiar with Begin, Play and tick the comments here. 106 00:07:21,980 --> 00:07:23,300 ‫Explain what they do. 107 00:07:23,330 --> 00:07:28,790 ‫Set up player input component is something that the pawn gets and this function allows us to handle 108 00:07:28,790 --> 00:07:34,250 ‫input such as from a keyboard key or a mouse click and we'll learn more about how this works in future 109 00:07:34,250 --> 00:07:35,690 ‫videos in baseband. 110 00:07:35,840 --> 00:07:41,930 ‫CP These functions are defined for us, but they're pretty bare and won't change that in future videos 111 00:07:41,930 --> 00:07:42,740 ‫as well. 112 00:07:42,740 --> 00:07:49,370 ‫So in this video we created our first C++ class and the next video will discuss components and why we 113 00:07:49,370 --> 00:07:51,770 ‫would like to add some to our new class. 114 00:07:51,800 --> 00:07:52,790 ‫I'll see you soon.