1 00:00:00,800 --> 00:00:05,430 Welcome back, My favorite game developers. 2 00:00:05,430 --> 00:00:09,880 As you can see now we have three enemies, x2, very scary. 3 00:00:09,884 --> 00:00:11,554 Let me maximize on play. 4 00:00:11,550 --> 00:00:14,220 And we have a wrong with not only have doors, 5 00:00:14,220 --> 00:00:15,630 we also have enemies, 6 00:00:15,630 --> 00:00:17,460 which are three skeletons. 7 00:00:17,460 --> 00:00:21,930 These skeletons are the guys we need to kill in order to open the doors. 8 00:00:21,930 --> 00:00:26,780 But for now what we do is we just catch them in the act using a list. 9 00:00:26,775 --> 00:00:28,785 So I've maximized on play, 10 00:00:28,785 --> 00:00:30,525 I should not have done that. 11 00:00:30,525 --> 00:00:32,345 I'm now going to run again. 12 00:00:32,340 --> 00:00:36,210 If I look in the rooms and today now, 13 00:00:36,205 --> 00:00:40,855 I can see that I have the enemies right here and I have the two doors, 14 00:00:40,850 --> 00:00:44,570 but the magic is that we caught them without adding them manually. 15 00:00:44,570 --> 00:00:48,550 You can see that it happens automatically using contact filters, 16 00:00:48,545 --> 00:00:51,445 using lists, using a lot of cool stuff. 17 00:00:51,440 --> 00:00:55,280 So let's not waste any more time and let's get started. 18 00:00:55,280 --> 00:00:56,810 Oh, case. 19 00:00:56,810 --> 00:00:59,590 So now we have the doors closing. 20 00:00:59,585 --> 00:01:03,205 It's time to start opening them up. 21 00:01:03,200 --> 00:01:05,300 How do we open up the doors? 22 00:01:05,300 --> 00:01:09,050 The way we will allow them to open is when we get 23 00:01:09,050 --> 00:01:13,490 rid of all the enemies that we have in the current map. 24 00:01:13,490 --> 00:01:16,310 So what we're going to do is we're going to 25 00:01:16,310 --> 00:01:20,140 create a variable which will first of all make sure that the, 26 00:01:20,135 --> 00:01:22,985 all the doors open when all the enemies are killed. 27 00:01:22,985 --> 00:01:28,535 Maybe just maybe the level that you created doesn't have to kill all the enemies. 28 00:01:28,535 --> 00:01:30,625 Maybe it's a level for the shop, 29 00:01:30,620 --> 00:01:32,840 for example, just like we had in Hades. 30 00:01:32,840 --> 00:01:35,300 So that's why we'll add this variable. 31 00:01:35,300 --> 00:01:37,160 So let's get started. 32 00:01:37,159 --> 00:01:39,679 So in here we have the enemy controller. 33 00:01:39,680 --> 00:01:42,390 As you can see, I've organized everything. 34 00:01:42,394 --> 00:01:45,444 Anyways, let's not waste time because in the wrong manager, 35 00:01:45,440 --> 00:01:48,130 we are going to add the volume right here. 36 00:01:48,125 --> 00:01:53,645 And that is to open or open doors. 37 00:01:53,645 --> 00:01:59,585 When and and me is dy. 38 00:01:59,585 --> 00:02:01,405 There you go. We save that. 39 00:02:01,400 --> 00:02:04,700 We'll go back in here and we'll make sure to set this, 40 00:02:04,700 --> 00:02:09,170 this particular room to true open when enemies die. 41 00:02:09,170 --> 00:02:10,120 Okay, great. 42 00:02:10,115 --> 00:02:14,995 Next thing we need to do is we need to get a reference of all the enemies. 43 00:02:14,990 --> 00:02:16,420 Well, how do we do that? 44 00:02:16,415 --> 00:02:18,475 We will have obviously multiple enemies. 45 00:02:18,470 --> 00:02:23,750 That means we will have to most likely get some sort of array. 46 00:02:23,750 --> 00:02:27,250 But why we don't want to use an array? 47 00:02:27,245 --> 00:02:29,285 Because when we have an array, 48 00:02:29,285 --> 00:02:31,315 how am I going to demonstrate this? 49 00:02:31,310 --> 00:02:33,530 So for example, you can see right here, 50 00:02:33,530 --> 00:02:35,960 if I click on one of those arrays right here, 51 00:02:35,960 --> 00:02:37,770 and if I use the minus, 52 00:02:37,774 --> 00:02:41,734 this will simply remove the door from our game. 53 00:02:41,735 --> 00:02:44,575 It does not actually delete the entire element. 54 00:02:44,570 --> 00:02:47,990 So we still have two doors right here, 55 00:02:47,990 --> 00:02:49,780 but one of them is missing. 56 00:02:49,775 --> 00:02:51,575 Now when it comes to the door, 57 00:02:51,575 --> 00:02:56,455 this is not a huge problem because we already know that we will have only two doors. 58 00:02:56,450 --> 00:02:58,220 We are not going to count them. 59 00:02:58,220 --> 00:03:00,080 We are not going to get rid of them. 60 00:03:00,080 --> 00:03:02,030 They are there, they are static, 61 00:03:02,030 --> 00:03:03,440 they are not moving. 62 00:03:03,440 --> 00:03:05,500 But when it comes to the enemies, 63 00:03:05,495 --> 00:03:09,865 what we want is we want to get a reference to all the enemies in the map. 64 00:03:09,860 --> 00:03:12,950 And then as we slowly kill them one by one, 65 00:03:12,950 --> 00:03:14,620 we are going to count them. 66 00:03:14,615 --> 00:03:17,665 And if we find that all of them have disappeared, 67 00:03:17,660 --> 00:03:19,210 then we will open the door. 68 00:03:19,205 --> 00:03:22,915 And this will cause a problem when we are using a rate. 69 00:03:22,910 --> 00:03:26,870 That's why we are going to use something a bit better, 70 00:03:26,870 --> 00:03:29,320 which is the list. 71 00:03:29,315 --> 00:03:32,495 So a list is just like an array. 72 00:03:32,495 --> 00:03:35,345 It represents a strongly typed list of objects. 73 00:03:35,345 --> 00:03:40,055 And by the way, this is the documentations of Microsoft for the C-sharp, 74 00:03:40,055 --> 00:03:42,085 not the Unity documentation, 75 00:03:42,080 --> 00:03:43,730 but it's pretty much the same. 76 00:03:43,730 --> 00:03:44,840 You can find examples, 77 00:03:44,840 --> 00:03:48,440 you can find what ever you want and lists 78 00:03:48,440 --> 00:03:53,000 the great thing about them as they are much better at sorting, 79 00:03:53,000 --> 00:03:57,140 they are much better at sorting through and manipulating. 80 00:03:57,140 --> 00:04:00,560 So what we can do is as each enemy dies, 81 00:04:00,560 --> 00:04:05,420 we can remove him from the list without worrying about any kinds of error, 82 00:04:05,420 --> 00:04:07,660 the list will adjust itself. 83 00:04:07,655 --> 00:04:13,165 So that explained, I will let you find the list, 84 00:04:13,160 --> 00:04:16,400 the class, find the documentation of this. 85 00:04:16,400 --> 00:04:21,010 And I'm going to issue you the challenge again just like the last challenge I know. 86 00:04:21,005 --> 00:04:26,005 So annoying when you have to do something by yourself without seeing what I did first. 87 00:04:26,000 --> 00:04:28,580 But it's time to grow up, 88 00:04:28,580 --> 00:04:31,010 time to become real game developers, 89 00:04:31,010 --> 00:04:35,200 look for problems and do things that we have never encountered before. 90 00:04:35,195 --> 00:04:36,565 This is the beauty of it. 91 00:04:36,560 --> 00:04:41,560 Look through the documentation and find how we can instantiate a new. 92 00:04:41,555 --> 00:04:44,665 Let's create a serialized field list. 93 00:04:44,660 --> 00:04:46,630 We want to see the list in the inspector. 94 00:04:46,625 --> 00:04:49,975 Later on, we obviously need to make it private, 95 00:04:49,970 --> 00:04:52,840 but we want to check if everything is working. 96 00:04:52,835 --> 00:05:00,245 And finally, the type of the list will be a collider to D. So find the documentation, 97 00:05:00,245 --> 00:05:03,275 go through it, create a new list, 98 00:05:03,275 --> 00:05:07,105 which is the list of enemies of type collider 2D. 99 00:05:07,100 --> 00:05:09,500 I'll see you in just a bit. 100 00:05:09,500 --> 00:05:12,050 Okay, welcome back. 101 00:05:12,050 --> 00:05:13,960 So how did you get on that? 102 00:05:13,955 --> 00:05:15,865 I hope you're not too angry at me. 103 00:05:15,860 --> 00:05:19,310 Anyways, let's go ahead and create a serialized field. 104 00:05:19,310 --> 00:05:21,970 And this is going to be a list. 105 00:05:21,965 --> 00:05:23,965 And as you can see, well, 106 00:05:23,960 --> 00:05:25,280 you saw in the example, 107 00:05:25,280 --> 00:05:27,860 let's just double-check and see how it's created. 108 00:05:27,860 --> 00:05:31,760 So you can see it needs the systems dot collections, 109 00:05:31,760 --> 00:05:33,010 which is right here. 110 00:05:33,005 --> 00:05:37,295 Oops, sorry, which is right here that allows us to create lists. 111 00:05:37,295 --> 00:05:40,355 Let's go see what we have in here. 112 00:05:40,355 --> 00:05:41,905 Let's say I'm scrolling down, 113 00:05:41,900 --> 00:05:43,550 how do you create lists, please? 114 00:05:43,550 --> 00:05:45,350 How do I create a list? 115 00:05:45,350 --> 00:05:49,410 Where is it? Where is it? 116 00:05:49,930 --> 00:05:51,890 Okay, So there you go. 117 00:05:51,890 --> 00:05:53,510 This is how you create a list. 118 00:05:53,510 --> 00:05:58,550 So we need to type in the type of this that we have inside these two unnatural, 119 00:05:58,550 --> 00:06:02,180 what they're called and say that it's equal to a new list. 120 00:06:02,180 --> 00:06:04,030 So back in here, 121 00:06:04,025 --> 00:06:07,835 the type collider 2D, 122 00:06:07,835 --> 00:06:09,445 I've already told you that. 123 00:06:09,440 --> 00:06:12,680 And you'll see why it's a collider 2D in just a bit. 124 00:06:12,680 --> 00:06:15,110 So enemies, and it's equal to 125 00:06:15,110 --> 00:06:22,600 a new list of Collider to the enemies and we close it off with these two parentheses. 126 00:06:22,595 --> 00:06:26,645 Now, obviously it took you just a little bit more time to find everything, 127 00:06:26,645 --> 00:06:29,195 maybe look through the documentation, but that's good. 128 00:06:29,195 --> 00:06:33,025 Now you can say that proudly that shoe look through 129 00:06:33,020 --> 00:06:36,920 the documentation found out by yourself how lists are created, 130 00:06:36,920 --> 00:06:39,290 and this will give you much more confidence 131 00:06:39,290 --> 00:06:41,890 as you move through your game development journey. 132 00:06:41,885 --> 00:06:43,595 I'm not always going to be here. 133 00:06:43,595 --> 00:06:47,275 Sometimes I won't be sometimes I'm don't have the time to answer you. 134 00:06:47,270 --> 00:06:49,700 So this is a great exercise. 135 00:06:49,700 --> 00:06:51,140 I love these exercises. 136 00:06:51,140 --> 00:06:52,270 I hope you're not too angry. 137 00:06:52,265 --> 00:06:55,025 Let's continue on. What do we need to do right now? 138 00:06:55,025 --> 00:06:58,315 We need to go into the rooms right here 139 00:06:58,310 --> 00:07:01,460 and we're going to create a new empty game object, 140 00:07:01,460 --> 00:07:03,740 which will be the enemies. 141 00:07:03,739 --> 00:07:06,729 And this will hold all the enemies that we have. 142 00:07:06,725 --> 00:07:11,375 The skeleton enemy right here that C does he need anything? 143 00:07:11,375 --> 00:07:12,965 Also the shooting range. 144 00:07:12,965 --> 00:07:18,335 Let's make it a bit smaller so we don't want the enemies to shoot us. 145 00:07:18,335 --> 00:07:19,895 We know everything works. 146 00:07:19,895 --> 00:07:22,225 That's good and we are going to make their health. 147 00:07:22,220 --> 00:07:24,170 But smaller, maybe three. 148 00:07:24,170 --> 00:07:27,760 So he takes three hits, apply the changes. 149 00:07:27,755 --> 00:07:30,995 And I'm going to move him to the enemies. 150 00:07:30,995 --> 00:07:35,515 I'm going to also go into the Prefabs and add a couple of enemies. 151 00:07:35,510 --> 00:07:38,510 And here, so the enemy, 152 00:07:38,510 --> 00:07:41,480 the skeleton will adding another one. 153 00:07:41,480 --> 00:07:45,380 Here. Another one, so great. 154 00:07:45,380 --> 00:07:50,410 Now we have three skeletons roaming around that will chase and shoot the player. 155 00:07:50,405 --> 00:07:51,455 We will save that. 156 00:07:51,455 --> 00:07:52,525 Okay, great. 157 00:07:52,520 --> 00:07:56,660 Now the next thing that we want to do is we want to get the, 158 00:07:56,660 --> 00:07:59,750 a reference to all those enemies and be able to count them. 159 00:07:59,750 --> 00:08:01,460 Now what we can do, obviously, 160 00:08:01,460 --> 00:08:02,480 as we can go ahead, 161 00:08:02,480 --> 00:08:05,960 select these three and drag them in here and set them manually. 162 00:08:05,960 --> 00:08:07,960 That would be good, 163 00:08:07,955 --> 00:08:09,745 that would be working. 164 00:08:09,740 --> 00:08:14,630 But we want to have a more dynamic way of accessing these enemies. 165 00:08:14,630 --> 00:08:19,090 One of those dynamic ways is using find objects of type, 166 00:08:19,085 --> 00:08:22,795 where we go through all the objects and we find all of them. 167 00:08:22,790 --> 00:08:24,560 This is also a good idea, 168 00:08:24,560 --> 00:08:27,590 but it is very taxing on the system. 169 00:08:27,590 --> 00:08:29,990 You have to go through all the elements, 170 00:08:29,990 --> 00:08:32,900 starting from the camera and down until you 171 00:08:32,900 --> 00:08:37,610 find all of these enemies of type or object of type. 172 00:08:37,610 --> 00:08:39,370 We're not going to do that. 173 00:08:39,365 --> 00:08:43,795 Instead, we are going to do something much more complicated at first, 174 00:08:43,790 --> 00:08:47,800 but much more effective and less taxing on the system. 175 00:08:47,795 --> 00:08:51,145 And it's a great way to learn something very new. 176 00:08:51,140 --> 00:08:53,110 And we already have the, 177 00:08:53,105 --> 00:08:56,545 let's say the infrastructure for that established by having 178 00:08:56,540 --> 00:09:00,250 the colliders of the enemies and the collider of the room. 179 00:09:00,245 --> 00:09:01,855 So what am I talking about? 180 00:09:01,850 --> 00:09:02,660 You just saw it. 181 00:09:02,660 --> 00:09:06,160 It's the collider, 2D overlap collider. 182 00:09:06,155 --> 00:09:07,315 What does this do? 183 00:09:07,310 --> 00:09:09,050 It takes in a contact filter, 184 00:09:09,050 --> 00:09:11,260 which we will look at in just a bit. 185 00:09:11,255 --> 00:09:15,265 And it gives us the results of all the collider 2D objects. 186 00:09:15,260 --> 00:09:19,930 So a contact filter used to filter the results differently. 187 00:09:19,925 --> 00:09:21,835 What do we mean by that? 188 00:09:21,830 --> 00:09:25,360 We mean that we have the collider of the room right here. 189 00:09:25,355 --> 00:09:27,245 So we have the collider, 190 00:09:27,244 --> 00:09:29,524 we have all the objects inside. 191 00:09:29,525 --> 00:09:31,315 We don't want to catch the player, 192 00:09:31,310 --> 00:09:34,540 for example, we are only interested in the skeletons. 193 00:09:34,535 --> 00:09:39,215 So we need to add this contact filter that will understand how it's used. 194 00:09:39,215 --> 00:09:40,685 But let's continue on. 195 00:09:40,685 --> 00:09:42,635 So contact filter and the result, 196 00:09:42,635 --> 00:09:44,575 that result, It's the array. 197 00:09:44,570 --> 00:09:46,210 To receive the results. 198 00:09:46,205 --> 00:09:47,455 We can use an array, 199 00:09:47,450 --> 00:09:50,380 we can use also a list. 200 00:09:50,375 --> 00:09:52,135 Don't worry about that. 201 00:09:52,130 --> 00:09:53,630 Let's continue one. 202 00:09:53,630 --> 00:09:54,290 What do we need? 203 00:09:54,290 --> 00:09:58,580 So it returns the number of results if we want a return, 204 00:09:58,580 --> 00:10:02,030 and then we are going to check what is a contact filter. 205 00:10:02,030 --> 00:10:05,330 So I'm giving you all the ways of how we create. 206 00:10:05,330 --> 00:10:08,750 So honestly, I had no idea what a contact filter was. 207 00:10:08,750 --> 00:10:12,440 This is the first time I encountered when I was creating this game, 208 00:10:12,440 --> 00:10:15,710 even though I've had a lot of experience in game development, 209 00:10:15,710 --> 00:10:19,030 this is really the first time that I actually used it into the, 210 00:10:19,025 --> 00:10:21,305 so I went and looked for it. 211 00:10:21,305 --> 00:10:24,245 Okay, So look, we have a lot of properties. 212 00:10:24,245 --> 00:10:26,065 And if you go back, 213 00:10:26,060 --> 00:10:28,700 we can see right here results differently. 214 00:10:28,700 --> 00:10:30,500 And what else do we have? 215 00:10:30,500 --> 00:10:33,020 We have something called bi layer mask. 216 00:10:33,020 --> 00:10:35,170 I know what layer mask is, 217 00:10:35,165 --> 00:10:37,765 so I have to look and I find. 218 00:10:37,760 --> 00:10:39,650 Set Layer Mask, excellent. 219 00:10:39,650 --> 00:10:44,900 This sets the layer mask based on some kind of provided a parameter or something. 220 00:10:44,900 --> 00:10:46,180 Great. I click on it, 221 00:10:46,175 --> 00:10:48,355 I see contact filter, layer mask. 222 00:10:48,350 --> 00:10:50,020 I give it a layer mask. 223 00:10:50,015 --> 00:10:54,485 I know what the layer mask is and I'll show you how we are going to use it. 224 00:10:54,485 --> 00:10:58,045 But anyways, these are the steps that even I sometimes take. 225 00:10:58,040 --> 00:10:59,960 So don't think that NEW, 226 00:10:59,960 --> 00:11:02,290 don't remember everything and you should know, 227 00:11:02,285 --> 00:11:04,585 no, you should do your own research. 228 00:11:04,580 --> 00:11:09,260 Always look through the documentation and now let's go ahead and get started. 229 00:11:09,260 --> 00:11:13,150 So I'm going to go back in here and I'm going to create, first of all, 230 00:11:13,145 --> 00:11:18,445 a private collider 2D, 231 00:11:18,440 --> 00:11:22,910 and this will be the room collider. 232 00:11:22,910 --> 00:11:24,010 Save that. 233 00:11:24,005 --> 00:11:27,205 And then a, another private contact 234 00:11:27,200 --> 00:11:30,860 filtered to D and it's going to be the contact filter to D. 235 00:11:30,860 --> 00:11:32,900 I'll just keep the name as it is. 236 00:11:32,900 --> 00:11:34,450 So now and start, 237 00:11:34,445 --> 00:11:35,875 what are we going to do? 238 00:11:35,870 --> 00:11:39,160 Well, first of all, we need a reference to the room collider. 239 00:11:39,155 --> 00:11:43,285 So room collider is equal to get components. 240 00:11:43,280 --> 00:11:47,270 And it's going to be the collider 2D. 241 00:11:47,270 --> 00:11:51,290 Great, So now we have a reference to the collider on the room. 242 00:11:51,290 --> 00:11:56,030 Next thing we want to do is we want to get the contact filter 2D. 243 00:11:56,030 --> 00:12:00,290 And we're going to set the layer mask just like we saw. 244 00:12:00,290 --> 00:12:03,350 And what did we say we need inside of the set Layer Mask, 245 00:12:03,350 --> 00:12:05,140 we need the Layer Mask. 246 00:12:05,135 --> 00:12:06,865 How do we get the layer mask? 247 00:12:06,860 --> 00:12:08,570 Well, we know what layer is, 248 00:12:08,570 --> 00:12:09,940 but what is the mask? 249 00:12:09,935 --> 00:12:14,715 The mask is a way to let us say to convert, 250 00:12:14,719 --> 00:12:16,989 to understand what the layers are. 251 00:12:16,985 --> 00:12:18,775 So what can we do? 252 00:12:18,770 --> 00:12:21,800 We can use something called the layer mask. 253 00:12:21,800 --> 00:12:26,560 And we can use a method in here that says to get the mask. 254 00:12:26,555 --> 00:12:28,465 And how do we get the mask? 255 00:12:28,460 --> 00:12:31,040 We can get it actually buy the layers name. 256 00:12:31,040 --> 00:12:34,300 Great, so now we have access to the layer's name. 257 00:12:34,295 --> 00:12:37,075 And what does the layer, it's the enemy. 258 00:12:37,070 --> 00:12:39,350 And because this is a string reference, 259 00:12:39,350 --> 00:12:42,070 makes sure that shoe have potted correctly, 260 00:12:42,065 --> 00:12:44,105 go even copy it if you have to. 261 00:12:44,105 --> 00:12:46,265 But what's happening in here, 262 00:12:46,265 --> 00:12:47,765 we got the layer name. 263 00:12:47,765 --> 00:12:49,405 We use the get mask, 264 00:12:49,400 --> 00:12:53,290 which is a method available in the layer mask library. 265 00:12:53,285 --> 00:13:00,775 We use this whole layer mask and set the layer mask on the contact filter. 266 00:13:00,770 --> 00:13:02,680 Complicated, I know. 267 00:13:02,675 --> 00:13:10,105 And now we use the room collider, thought overlap collider. 268 00:13:10,100 --> 00:13:11,780 And in here, what did we need? 269 00:13:11,780 --> 00:13:13,900 We need the compact filter to the, 270 00:13:13,895 --> 00:13:15,205 what are the results? 271 00:13:15,200 --> 00:13:17,180 Where do we want to throw our results? 272 00:13:17,180 --> 00:13:18,560 And you can see right here the arrow, 273 00:13:18,560 --> 00:13:20,080 if you click it, there you go. 274 00:13:20,075 --> 00:13:25,445 You can add it to a list or we can add it to a collider 2D based on what we give it. 275 00:13:25,445 --> 00:13:27,725 So if we give it an array in here, 276 00:13:27,725 --> 00:13:29,575 then this result will be an array. 277 00:13:29,570 --> 00:13:32,750 But because we're giving it currently a list, 278 00:13:32,750 --> 00:13:37,340 this will be as a list, save that record. 279 00:13:37,340 --> 00:13:40,750 So again, let's go through this one more time. 280 00:13:40,745 --> 00:13:42,685 We created a contact filter. 281 00:13:42,680 --> 00:13:46,450 We understood what contact filters are through the unit documentations. 282 00:13:46,445 --> 00:13:48,595 We've added a collider 2D. 283 00:13:48,590 --> 00:13:49,730 That's very simple. 284 00:13:49,730 --> 00:13:52,220 We got a reference using the get component. 285 00:13:52,220 --> 00:13:53,860 We already know how we do that. 286 00:13:53,855 --> 00:13:55,885 We access the contact filter. 287 00:13:55,880 --> 00:13:58,880 We use a method called the Set Layer Mask. 288 00:13:58,880 --> 00:14:01,090 This set Layer Mask requires a, 289 00:14:01,085 --> 00:14:03,055 something called a layer mask, 290 00:14:03,050 --> 00:14:05,410 not just a layer, a layer mask. 291 00:14:05,405 --> 00:14:07,145 So what we do, 292 00:14:07,145 --> 00:14:09,215 we looked for get Layer Mask. 293 00:14:09,215 --> 00:14:12,665 And this will actually be a sight challenge to you. 294 00:14:12,665 --> 00:14:15,035 Go look for Layer Mask, 295 00:14:15,035 --> 00:14:18,335 get Layer Mask and stand how we found this method. 296 00:14:18,335 --> 00:14:21,215 So this is a whole different process. 297 00:14:21,215 --> 00:14:22,915 We use the get layer mask, 298 00:14:22,910 --> 00:14:27,040 which is part of the layer mask and Unity engine layer mask, 299 00:14:27,035 --> 00:14:29,245 and we use the name of the enemy layer. 300 00:14:29,240 --> 00:14:33,680 So now what happens as soon as this room manager starts? 301 00:14:33,680 --> 00:14:36,440 First of all, on Trigger Enter it finds the enemy. 302 00:14:36,440 --> 00:14:40,540 Second of all, it looks through all the enemies that are already here. 303 00:14:40,535 --> 00:14:44,725 And as I've said, there are many ways of catching the enemies. 304 00:14:44,720 --> 00:14:46,390 There is find objects of type. 305 00:14:46,385 --> 00:14:48,475 We can have used the entrepreneur enter, 306 00:14:48,470 --> 00:14:52,570 but I thought this is a great opportunity to learn about lists. 307 00:14:52,565 --> 00:14:55,855 Learn about contact filter in never know when. 308 00:14:55,850 --> 00:14:58,970 Sometimes you might find yourself in a situation and 309 00:14:58,970 --> 00:15:02,710 programming where you just can't do it without a contact filter. 310 00:15:02,705 --> 00:15:05,015 So save all of that. 311 00:15:05,015 --> 00:15:09,595 We go back into Unity and let's look at our enemies now as soon as we run, 312 00:15:09,590 --> 00:15:11,420 we should see the three enemies here. 313 00:15:11,420 --> 00:15:13,910 Hopefully run the game. 314 00:15:13,910 --> 00:15:16,190 There we go. Excellent. 315 00:15:16,190 --> 00:15:19,510 And you can see that we've got all the colliders of skeleton one, 316 00:15:19,505 --> 00:15:22,145 skeleton to and skeleton three, 317 00:15:22,145 --> 00:15:23,845 or however you want to call it. 318 00:15:23,840 --> 00:15:26,780 Excellent, We have a reference to them. 319 00:15:26,780 --> 00:15:30,110 So now the next step is to kill all of them 320 00:15:30,110 --> 00:15:33,710 and open the doors with blue that in the next video, 321 00:15:33,710 --> 00:15:36,140 make sure to complete your changes. 322 00:15:36,140 --> 00:15:42,360 Make sure to leave a review and I'll see you in the next video.