1 00:00:00,000 --> 00:00:04,530 Welcome back, My favorite game developers in this video, 2 00:00:04,530 --> 00:00:09,720 when we set the time between shots to 0.1 and we start shooting our birds. 3 00:00:09,720 --> 00:00:13,680 You'll notice that even though they are on top of each other, 4 00:00:13,680 --> 00:00:15,950 they do not destroy themselves, 5 00:00:15,945 --> 00:00:20,195 but they still get destroyed when they hit any wall. 6 00:00:20,190 --> 00:00:25,470 Not only that, if I have a lot of bullets being fired and walk the player through them, 7 00:00:25,470 --> 00:00:27,830 you'll notice that the player also, 8 00:00:27,825 --> 00:00:31,385 or the bullets and the player not interact with each other and 9 00:00:31,380 --> 00:00:35,100 they don't get destroyed upon hitting the layer, 10 00:00:35,100 --> 00:00:36,120 which is a good mechanic. 11 00:00:36,120 --> 00:00:39,920 We don't want the player to use the bullet to be able to kill themselves. 12 00:00:39,915 --> 00:00:41,475 This is a game mechanic. 13 00:00:41,475 --> 00:00:43,165 So with that said, 14 00:00:43,160 --> 00:00:44,870 let's not waste any more time, 15 00:00:44,870 --> 00:00:51,770 and let's get started by learning layer and physics 2D matrix k. 16 00:00:51,770 --> 00:00:55,210 So now when we run our game, 17 00:00:55,205 --> 00:00:57,565 you'll see that we can fire our books. 18 00:00:57,560 --> 00:01:00,350 But the problem is if we try to press it multiple 19 00:01:00,350 --> 00:01:03,680 times or if we set the time between shots, 20 00:01:03,680 --> 00:01:08,930 for example, 0.1, you'll see that we don't see any bullets flying away. 21 00:01:08,930 --> 00:01:09,350 Why? 22 00:01:09,350 --> 00:01:11,380 Because notice on the left, 23 00:01:11,375 --> 00:01:14,245 we have the bullets firing and destroying 24 00:01:14,240 --> 00:01:18,220 themselves because they are interacting with each other. 25 00:01:18,215 --> 00:01:19,765 And we don't want that. 26 00:01:19,760 --> 00:01:21,740 We want to fix this problem. 27 00:01:21,740 --> 00:01:23,890 How are we going to do this? 28 00:01:23,885 --> 00:01:25,565 Now before we continue on, 29 00:01:25,565 --> 00:01:28,655 maybe it's something that you do want to keep in your game. 30 00:01:28,655 --> 00:01:30,025 But honestly for me, 31 00:01:30,020 --> 00:01:33,880 it's kind of annoying having your bullets be destroyed. 32 00:01:33,875 --> 00:01:37,915 So again, how are we going to fix this? 33 00:01:37,910 --> 00:01:43,070 Well, if we look right here on the right and the inspector of any game object, 34 00:01:43,070 --> 00:01:46,030 we can see that we have something called the layer. 35 00:01:46,025 --> 00:01:50,095 And I've showed you this previously when we were talking about sorting layers, 36 00:01:50,090 --> 00:01:53,080 but we haven't delved deep into it. 37 00:01:53,075 --> 00:01:55,405 So if I go back to layers, 38 00:01:55,400 --> 00:02:00,820 you can see that I have tags which we will talk about In the future. 39 00:02:00,815 --> 00:02:04,465 We have the sorting layers which determine which Sprite 40 00:02:04,460 --> 00:02:08,450 or which layer renders in front of which other layer. 41 00:02:08,450 --> 00:02:11,060 And we also have the layers. 42 00:02:11,060 --> 00:02:13,750 And you can see that we already have the default 43 00:02:13,745 --> 00:02:17,035 transparent affects, ignore re-cast water. 44 00:02:17,030 --> 00:02:23,240 You are all of these different layers that are already present in Unity. 45 00:02:23,240 --> 00:02:29,480 So what we're going to do is we are going to set the bullets on a certain layer. 46 00:02:29,480 --> 00:02:34,070 You might be asking, but why should we be setting these bullets on a certain layer? 47 00:02:34,070 --> 00:02:42,340 Well, let me show you by first creating the player bullets layer. 48 00:02:42,335 --> 00:02:46,555 Now, we want to go into the projects. 49 00:02:46,550 --> 00:02:50,710 Go into our where are the prefabs, the pleasurable it? 50 00:02:50,705 --> 00:02:55,445 And let's just set the player bullet on the player bullets layer. 51 00:02:55,445 --> 00:02:57,355 Okay, So this was the prefab. 52 00:02:57,350 --> 00:02:59,960 So all subsequent creation or 53 00:02:59,960 --> 00:03:03,590 clones of this prefab will also be on the player bullet layer. 54 00:03:03,590 --> 00:03:06,400 But still, how is this helping us? 55 00:03:06,395 --> 00:03:09,325 Well, if we go into our edit, 56 00:03:09,320 --> 00:03:11,590 into our project settings, 57 00:03:11,585 --> 00:03:15,005 and if we go into the physics 2D and scroll down, 58 00:03:15,005 --> 00:03:19,205 we can see right here this layer collision matrix. 59 00:03:19,205 --> 00:03:20,795 And if you, sorry, 60 00:03:20,795 --> 00:03:22,105 if you tilt your head, 61 00:03:22,100 --> 00:03:24,370 you can see, let me maximize this. 62 00:03:24,365 --> 00:03:28,975 You can see that we have the default transparent re-cast player bullets, 63 00:03:28,970 --> 00:03:31,760 water UI, and on this side also. 64 00:03:31,760 --> 00:03:34,540 So how does this matrix work? 65 00:03:34,535 --> 00:03:37,345 Let's say we have the default layer, 66 00:03:37,340 --> 00:03:39,760 which was previously the bullets layer. 67 00:03:39,755 --> 00:03:45,605 And we can see that it also interacts right here with the default layer on this side. 68 00:03:45,605 --> 00:03:49,765 So what we can do is we can actually turn this off. 69 00:03:49,760 --> 00:03:54,710 So now the default layer does not interact with the other default layers. 70 00:03:54,710 --> 00:03:59,810 But obviously we don't want that to happen because whenever you create a game object, 71 00:03:59,810 --> 00:04:01,960 you will have it as default. 72 00:04:01,955 --> 00:04:04,975 And maybe we do want some of the default 73 00:04:04,970 --> 00:04:08,360 game objects interacting with other default game objects. 74 00:04:08,360 --> 00:04:11,800 And that's why we created the player bullet. 75 00:04:11,795 --> 00:04:14,575 What we can do is we can say that the player bullet, 76 00:04:14,570 --> 00:04:15,880 which is right here, 77 00:04:15,875 --> 00:04:19,135 does not interact with the player bullet. 78 00:04:19,130 --> 00:04:21,080 So we turn this off. 79 00:04:21,080 --> 00:04:25,220 And now the player bullets should not destroy 80 00:04:25,219 --> 00:04:29,829 each other because they will not be able to interact with each other. 81 00:04:29,825 --> 00:04:31,115 Let's test this out. 82 00:04:31,115 --> 00:04:32,585 I'm going to go back. 83 00:04:32,585 --> 00:04:35,245 I'm going to run the game. 84 00:04:35,240 --> 00:04:38,840 And I'm going to go to the DOM player and okay, 85 00:04:38,840 --> 00:04:42,770 so the time between shots will be 0.1. 86 00:04:42,770 --> 00:04:45,110 And let's try to hold down the mouse button. 87 00:04:45,110 --> 00:04:48,190 Now when I hold down the mouse button, there you go. 88 00:04:48,185 --> 00:04:49,685 You can see that the bullets, 89 00:04:49,685 --> 00:04:52,195 even though they are on top of each other, 90 00:04:52,190 --> 00:04:54,350 are not destroying themselves, 91 00:04:54,350 --> 00:04:59,140 but they are still getting destroyed when they hit a wall. 92 00:04:59,135 --> 00:05:02,755 So you can see that clearly when we shoot towards the wall, 93 00:05:02,750 --> 00:05:07,510 but they are on top of each other and they do not destroy themselves. 94 00:05:07,505 --> 00:05:09,505 How cool is that? 95 00:05:09,500 --> 00:05:14,390 We have this powerful tool in our arsenal now where we can set 96 00:05:14,390 --> 00:05:16,910 different objects to different layers 97 00:05:16,910 --> 00:05:19,640 and make sure that they don't interact with each other. 98 00:05:19,640 --> 00:05:26,410 Now, another thing that we might want to change is the player bullets hitting the player. 99 00:05:26,405 --> 00:05:27,125 Again. 100 00:05:27,125 --> 00:05:30,905 I tell you, if you do want to keep this mechanic in your game, 101 00:05:30,905 --> 00:05:32,305 feel free to do it. 102 00:05:32,300 --> 00:05:36,710 If you don't, we are going to change the way bullets interact with the player. 103 00:05:36,710 --> 00:05:41,600 Now, currently, the player capsule collider is very small. 104 00:05:41,600 --> 00:05:44,810 What we can do is we can add another capsule collider. 105 00:05:44,810 --> 00:05:50,060 We will have to later on because what happens if one of the enemies shoots a bullet 106 00:05:50,060 --> 00:05:52,640 at our head and we don't have a collider 107 00:05:52,640 --> 00:05:55,520 there that does not register that we've been shot. 108 00:05:55,520 --> 00:05:56,630 We will fix that. 109 00:05:56,630 --> 00:06:02,270 But for now, let's just keep things simple and try to hit the player on his legs. 110 00:06:02,265 --> 00:06:04,095 So I'm going to run the game. 111 00:06:04,090 --> 00:06:05,490 I'm going to shoot a bullet. 112 00:06:05,485 --> 00:06:06,885 And if I stop there, 113 00:06:06,880 --> 00:06:10,930 you can see that it hits the player and can kill him. Again. 114 00:06:10,930 --> 00:06:12,490 You want to keep those mechanics. 115 00:06:12,490 --> 00:06:15,070 You want the player bullets to help the player. 116 00:06:15,070 --> 00:06:16,050 That's okay. 117 00:06:16,045 --> 00:06:19,685 But you will have to this challenge. 118 00:06:19,689 --> 00:06:23,789 You'll need to make sure that the player and the bullets won't interact. 119 00:06:23,785 --> 00:06:26,815 So create a layer, layer. 120 00:06:26,815 --> 00:06:29,665 Assign the player to that layer, 121 00:06:29,665 --> 00:06:33,205 and make sure that the player and the player bullets 122 00:06:33,205 --> 00:06:36,775 do not interact through the physics matrix. 123 00:06:36,775 --> 00:06:39,955 So that said, pause the video right now, 124 00:06:39,955 --> 00:06:41,505 go create the player layer. 125 00:06:41,500 --> 00:06:44,760 Make sure the bullets don't kill our player. 126 00:06:44,760 --> 00:06:47,180 Okay, welcome back. 127 00:06:47,180 --> 00:06:49,760 So how did you get on with that? 128 00:06:49,760 --> 00:06:51,490 Before I continue on, 129 00:06:51,485 --> 00:06:52,975 I just want to do something. 130 00:06:52,970 --> 00:06:55,120 I told you I wouldn't want to do it, 131 00:06:55,115 --> 00:06:56,465 but let's do it for now. 132 00:06:56,465 --> 00:06:59,255 I'm going to add a box collider to the player. 133 00:06:59,255 --> 00:07:01,915 This will not be where the player interacts. 134 00:07:01,910 --> 00:07:06,470 This will be just a box collider to determine that the player is being hit. 135 00:07:06,470 --> 00:07:11,410 So I'm going to make it around the size of the player and I'm going to make it 136 00:07:11,405 --> 00:07:16,465 a trigger because I don't want this box collider to interact with the world physically. 137 00:07:16,460 --> 00:07:20,090 I want to keep this box collider as a registered to if 138 00:07:20,090 --> 00:07:24,040 someone has deep layer or some kind of layer. 139 00:07:24,035 --> 00:07:26,545 So I'm going to save this. 140 00:07:26,540 --> 00:07:28,270 I'm going to run the game. 141 00:07:28,265 --> 00:07:30,355 Obviously, we'll need to override the prefab. 142 00:07:30,350 --> 00:07:32,780 I'm going to shoot this and if I walked towards the bullet, 143 00:07:32,780 --> 00:07:35,480 you can see that it hits the player. 144 00:07:35,480 --> 00:07:39,350 So let's go ahead into the layers appear. 145 00:07:39,350 --> 00:07:41,600 At layers, open the layers. 146 00:07:41,600 --> 00:07:45,230 I am going to add the player layer. 147 00:07:45,230 --> 00:07:48,500 And now I'm going to go into the doom player. 148 00:07:48,500 --> 00:07:53,740 I'm going to go into the Layers and I'm going to set this layer to the player layer. 149 00:07:53,735 --> 00:07:58,085 And you can see that when you change the layer of a parent, you get the option. 150 00:07:58,085 --> 00:07:59,915 Do you want to set the player, 151 00:07:59,915 --> 00:08:04,675 the player to player for all the child objects as well. 152 00:08:04,670 --> 00:08:06,850 Would you want to do that or not? 153 00:08:06,845 --> 00:08:10,325 I think it wouldn't harm if we set the children also. 154 00:08:10,325 --> 00:08:12,205 So I'm going to set this, 155 00:08:12,200 --> 00:08:13,760 I'm going to save this. 156 00:08:13,760 --> 00:08:17,720 I'm going to go into the project settings, physics, 157 00:08:17,720 --> 00:08:24,310 and I'm going to make sure that the player bullets and the player do not interact. 158 00:08:24,305 --> 00:08:28,325 So you can see where there is an intersection between the player bullets. 159 00:08:28,325 --> 00:08:34,345 The player. I'm going to make sure that there is no sign in here. There we go. 160 00:08:34,340 --> 00:08:35,720 Now if we run the game, 161 00:08:35,720 --> 00:08:39,020 the bullets should travel through the player. 162 00:08:39,020 --> 00:08:40,610 And yep, there we go. 163 00:08:40,610 --> 00:08:43,540 So we can shoot the bullets as many times as we want, 164 00:08:43,535 --> 00:08:45,415 and they do not hit the player. 165 00:08:45,410 --> 00:08:49,370 They keep floating until they hit some kind of enemy. 166 00:08:49,370 --> 00:08:51,160 So I hope you enjoy, 167 00:08:51,155 --> 00:08:54,385 I hope you like this new tool that you have. 168 00:08:54,380 --> 00:09:00,530 We can also apply all of our changes to the prefab that we have of the dome player. 169 00:09:00,530 --> 00:09:02,720 And in the next video, 170 00:09:02,720 --> 00:09:06,290 you'll notice that we have these bullets, 171 00:09:06,290 --> 00:09:07,480 okay, they are firing. 172 00:09:07,475 --> 00:09:08,815 It's, everything is nice, 173 00:09:08,810 --> 00:09:10,510 but when they hit a wall, 174 00:09:10,505 --> 00:09:12,275 there is nothing that's happening. 175 00:09:12,275 --> 00:09:15,325 The bullet is just disappearing and that's not very exciting. 176 00:09:15,320 --> 00:09:17,750 We want to have some kind of impact, 177 00:09:17,750 --> 00:09:19,070 some kind of effects, 178 00:09:19,070 --> 00:09:23,080 or we can feel the weight of those bullets hitting a wall. 179 00:09:23,075 --> 00:09:26,275 And that's exactly what we'll do in the next video by adding 180 00:09:26,270 --> 00:09:29,470 the special effects to the bullet upon impact. 181 00:09:29,465 --> 00:09:32,635 So don't forget to commit your changes. 182 00:09:32,630 --> 00:09:36,540 And I'll see you in the next video.