1 00:00:00,650 --> 00:00:05,970 Welcome back my fellow game developers to a brand new video. 2 00:00:05,969 --> 00:00:11,629 And in this one we've actually made our enemies lightly stupid. 3 00:00:11,625 --> 00:00:14,145 So even though he can shoot, 4 00:00:14,145 --> 00:00:18,705 but only the slight problem is that he shoots himself, 5 00:00:18,705 --> 00:00:20,445 which is sometimes good, 6 00:00:20,445 --> 00:00:22,425 especially if a very hard enemy. 7 00:00:22,425 --> 00:00:25,235 But in our case, we will be fixing it later on. 8 00:00:25,230 --> 00:00:27,930 But for now, all you need to know is that we can 9 00:00:27,930 --> 00:00:31,330 change the time between shots to, for example, three. 10 00:00:31,330 --> 00:00:33,410 And you can see it takes three seconds to shoot, 11 00:00:33,410 --> 00:00:35,660 but we don't do that using a counter. 12 00:00:35,660 --> 00:00:38,990 We do that using something called a co-routine, 13 00:00:38,990 --> 00:00:46,120 which is a very hard scaring but in credibly powerful tool to learn in Unity. 14 00:00:46,115 --> 00:00:50,245 So I need your concentration and your full attention. 15 00:00:50,240 --> 00:00:55,890 Let's not waste any more time and let's get started. 16 00:00:55,990 --> 00:01:02,930 Okay, so time to give our enemy the ability to shoot the player, 17 00:01:02,930 --> 00:01:05,420 or at least attack the player. 18 00:01:05,420 --> 00:01:10,460 We do have two different types of attacks that we are going to implement in our game. 19 00:01:10,460 --> 00:01:11,990 One of them will be the Malay, 20 00:01:11,990 --> 00:01:15,190 one of them will be simply shooting from afar or 21 00:01:15,185 --> 00:01:19,235 throwing the sword and the skeletons example. 22 00:01:19,235 --> 00:01:22,615 But we are going to focus more for now on the shooting from 23 00:01:22,610 --> 00:01:25,960 a distance and do them melee attacks later on. 24 00:01:25,955 --> 00:01:27,595 Maybe in a different section, 25 00:01:27,590 --> 00:01:31,570 may be in the boss section where we have the giant skeleton. 26 00:01:31,565 --> 00:01:33,545 Okay, with that out of the way, 27 00:01:33,545 --> 00:01:35,065 let's go ahead and get started. 28 00:01:35,060 --> 00:01:38,350 The first thing we're going to do is we're going to 29 00:01:38,345 --> 00:01:42,195 create a couple of variables and the enemy controller 0 case. 30 00:01:42,190 --> 00:01:45,970 So we are going to go into the enemy controller. 31 00:01:45,965 --> 00:01:49,865 And in here we are going to create a couple of variables. 32 00:01:49,865 --> 00:01:55,145 So before the death splatter right here, 33 00:01:55,145 --> 00:01:58,225 we're going to add attack, 34 00:01:58,220 --> 00:02:03,710 just a common so we know what everything is and it's going to be a serialized field 35 00:02:03,710 --> 00:02:09,400 of type Boolean and it's going to be a melee attack. 36 00:02:09,395 --> 00:02:11,585 So if it is a melee attacker, 37 00:02:11,585 --> 00:02:15,635 we are going to check it in the inspector and it will attack using melee. 38 00:02:15,635 --> 00:02:18,505 Then we are going to create a serialized fields, 39 00:02:18,500 --> 00:02:25,040 which is going to be a game object and it's going to be the enemy projectile. 40 00:02:25,040 --> 00:02:30,460 So this is what the enemy will be throwing out of his hand if he does shoot. 41 00:02:30,455 --> 00:02:34,945 Finally, we are going to create a transform dot. 42 00:02:34,940 --> 00:02:38,180 Oh, sorry, fire position. 43 00:02:38,180 --> 00:02:41,110 Okay, so now we have the projectile. 44 00:02:41,105 --> 00:02:43,435 We will create a file position. 45 00:02:43,430 --> 00:02:49,180 And we also want to have a time in-between the shots that the enemy does. 46 00:02:49,175 --> 00:02:51,965 So it's similar to the way we handled our gun. 47 00:02:51,965 --> 00:02:56,755 So float time between shots. 48 00:02:56,750 --> 00:03:04,520 And finally we are going to create a private bool ready to shoot. 49 00:03:04,520 --> 00:03:06,380 So what happens here? 50 00:03:06,380 --> 00:03:09,010 When we are ready to shoot, the enemy shoots, 51 00:03:09,005 --> 00:03:12,715 and every time he shoots and between time shots is going to calculate. 52 00:03:12,710 --> 00:03:14,270 So we did this using, 53 00:03:14,270 --> 00:03:16,730 I believe the counter. 54 00:03:16,730 --> 00:03:20,180 We created a counter where we count down the time until 55 00:03:20,180 --> 00:03:24,290 we finish a certain amount of time between shots when it's finished, 56 00:03:24,290 --> 00:03:25,900 then we can show it again. 57 00:03:25,895 --> 00:03:27,545 That was an old way. 58 00:03:27,545 --> 00:03:30,545 Now we are going to use something called the co-routine. 59 00:03:30,545 --> 00:03:34,105 So before I do that and introduce you to coroutines, 60 00:03:34,100 --> 00:03:38,390 let me first of all set the ready to shoot in here to true. 61 00:03:38,390 --> 00:03:40,280 So whenever the enemy starts, 62 00:03:40,280 --> 00:03:42,950 he is ready to shoot and an update. 63 00:03:42,950 --> 00:03:47,510 We are going to go ahead and create something in here which is a condition. 64 00:03:47,509 --> 00:03:50,829 And if The Malay attacker, 65 00:03:50,824 --> 00:03:54,484 or if we're not a merely attacker, we are not. 66 00:03:54,485 --> 00:03:59,305 When we put the exclamation mark again and we are ready to shoot. 67 00:03:59,300 --> 00:04:03,050 Then what we're going to do is we're going to go ahead 68 00:04:03,050 --> 00:04:07,040 and say that ready to shoot as false. 69 00:04:07,039 --> 00:04:11,859 And then in here we are going to start a coating. 70 00:04:11,854 --> 00:04:14,364 So what is a co-routine? 71 00:04:14,359 --> 00:04:16,179 Why do we need it in here? 72 00:04:16,175 --> 00:04:19,055 Let's have a bit of an explanation. 73 00:04:19,055 --> 00:04:21,715 So what is a coltan? 74 00:04:21,710 --> 00:04:25,970 A co-routine is a method that can suspend the execution of 75 00:04:25,970 --> 00:04:32,260 instructions until a certain condition or certain conditions are met. 76 00:04:32,255 --> 00:04:36,025 These suspensions are know as yield. 77 00:04:36,020 --> 00:04:37,730 And in our example, 78 00:04:37,730 --> 00:04:42,950 will be suspending the time until our enemy is ready to shoot again. 79 00:04:42,950 --> 00:04:46,880 So let's go back to our code and see what all of that means. 80 00:04:46,880 --> 00:04:48,460 So currently what we have, 81 00:04:48,455 --> 00:04:51,605 we check in the update which is called every single frame. 82 00:04:51,605 --> 00:04:57,485 We check if we are not aiming attacker and we are ready to shoot, 83 00:04:57,485 --> 00:04:59,665 then ready to shoot, set to false. 84 00:04:59,660 --> 00:05:04,430 And for example, here we are going to shoot the bullet. 85 00:05:04,430 --> 00:05:07,600 But what we want, just like we had in the counter, 86 00:05:07,595 --> 00:05:12,235 we want after a certain amount of time to be able to shoot. 87 00:05:12,230 --> 00:05:15,760 Again, we have this set to false because we don't want to shoot 88 00:05:15,755 --> 00:05:19,555 every single frame a bullet and have gazillions of bullets. 89 00:05:19,550 --> 00:05:23,530 So the way we fix this is by using a co-routine. 90 00:05:23,525 --> 00:05:26,395 So let me just go ahead and create a coroutine right 91 00:05:26,390 --> 00:05:30,520 here is going to be of type eye enumerator. 92 00:05:30,515 --> 00:05:34,675 You don't need to worry a lot about what our enumerator is, 93 00:05:34,670 --> 00:05:38,420 just know that it's the type of coatings. 94 00:05:38,420 --> 00:05:45,970 We're going to create the coroutine name as fire enemy, projectile. 95 00:05:45,965 --> 00:05:53,045 I'm going to open up the brackets and we are going to suspend the time. 96 00:05:53,045 --> 00:05:55,865 So I'm going to say that yield. 97 00:05:55,865 --> 00:05:58,835 Okay, Focus, yield. 98 00:05:58,835 --> 00:06:00,785 That means we are suspending. 99 00:06:00,785 --> 00:06:04,205 Return. New. 100 00:06:04,205 --> 00:06:07,735 Wait four seconds. 101 00:06:07,730 --> 00:06:09,890 I'm going to open up the brackets. 102 00:06:09,890 --> 00:06:15,340 And how many seconds do we want to weight as the time between shots? 103 00:06:15,335 --> 00:06:23,095 And after that, we can go ahead and instantiate the bullet or instantiate the projectile, 104 00:06:23,090 --> 00:06:25,520 which is the projectile, 105 00:06:25,520 --> 00:06:29,690 enemy projectile where do instantiated at the five position, 106 00:06:29,690 --> 00:06:35,810 that position and the position but rho station. 107 00:06:35,810 --> 00:06:40,630 And then what we can do is set the ready to shoot back to true. 108 00:06:40,625 --> 00:06:42,985 And now we can show it again. 109 00:06:42,980 --> 00:06:44,530 Complicated, isn't it? 110 00:06:44,525 --> 00:06:46,085 I know less explain. 111 00:06:46,085 --> 00:06:47,785 Oh, and before I forget, 112 00:06:47,780 --> 00:06:50,660 and here after we have the shoot, 113 00:06:50,660 --> 00:06:52,900 we start the co-routine, 114 00:06:52,895 --> 00:06:56,635 which is the far enemy projectile. 115 00:06:56,630 --> 00:06:59,000 Okay, now you're even more confused. 116 00:06:59,000 --> 00:07:02,050 Let's try this again and update. 117 00:07:02,045 --> 00:07:05,755 What do we have every single frame update as being cold, 118 00:07:05,750 --> 00:07:08,780 we have all these statements right here which we 119 00:07:08,780 --> 00:07:12,080 will be converting into methods in just a bit. 120 00:07:12,080 --> 00:07:14,210 But what we focus on is here, 121 00:07:14,210 --> 00:07:18,440 if we are not a melee attacker and we are ready to shoot, 122 00:07:18,440 --> 00:07:19,660 then ready to shoot, 123 00:07:19,655 --> 00:07:22,625 set to false, and we start a Colton. 124 00:07:22,625 --> 00:07:24,325 So what happens in here, 125 00:07:24,320 --> 00:07:26,260 ready to shoot a set to false? 126 00:07:26,255 --> 00:07:31,015 That means that this method or this condition right here is false. 127 00:07:31,010 --> 00:07:33,830 So we don't shoot again every single frame. 128 00:07:33,830 --> 00:07:35,630 That's why we set it to false. 129 00:07:35,630 --> 00:07:38,360 But how are we going to set it back to true? 130 00:07:38,360 --> 00:07:41,030 We used to do that using the counter. 131 00:07:41,030 --> 00:07:43,670 Now we are using something a coating. 132 00:07:43,669 --> 00:07:45,199 And just like I said, 133 00:07:45,200 --> 00:07:47,860 co-routine is called Using start coroutine. 134 00:07:47,855 --> 00:07:51,745 You put the name in here and you call it I enumerator. 135 00:07:51,740 --> 00:07:54,560 No worries. Don't worry about that. For now. 136 00:07:54,560 --> 00:07:57,190 You want to delve deeper into that? Be my guest. 137 00:07:57,185 --> 00:08:00,055 You don't have to know exactly what that means. 138 00:08:00,050 --> 00:08:01,930 We have the far enemy projectile, 139 00:08:01,925 --> 00:08:04,495 then we have this expansion, which is yield. 140 00:08:04,490 --> 00:08:08,180 Then we have the return new, wait four seconds. 141 00:08:08,180 --> 00:08:10,700 So because we have an ion numerator, 142 00:08:10,700 --> 00:08:15,230 we have to return a new weight four seconds. What does this do? 143 00:08:15,230 --> 00:08:19,160 Just like it says, it waits for a number of seconds, 144 00:08:19,160 --> 00:08:21,110 which is the time between shots. 145 00:08:21,110 --> 00:08:23,530 And after it waits for this, 146 00:08:23,525 --> 00:08:27,125 then we instantiate the enemy projectile. 147 00:08:27,125 --> 00:08:32,005 Enemy shoots, and he is ready to shoot again, again and again. 148 00:08:32,000 --> 00:08:34,360 So what happens in here? 149 00:08:34,355 --> 00:08:35,785 First of all, we start, 150 00:08:35,780 --> 00:08:38,210 we have the ready to shoot to true. 151 00:08:38,210 --> 00:08:39,850 We should. 152 00:08:39,845 --> 00:08:42,265 It's false, we no longer shoot. 153 00:08:42,260 --> 00:08:45,350 And when the time between shots ends, 154 00:08:45,350 --> 00:08:50,120 we throw the projectile and then we are ready to shoot again. 155 00:08:50,120 --> 00:08:52,960 Let's test this out and see how it works. 156 00:08:52,955 --> 00:08:55,255 I'm going to go back into Unity. 157 00:08:55,250 --> 00:09:00,500 I'm going to see where do we actually have our knife 0. 158 00:09:00,500 --> 00:09:01,760 So we don't have a knife. 159 00:09:01,760 --> 00:09:05,780 So what we'll do is we'll simply use the bullet that we already have. 160 00:09:05,780 --> 00:09:08,090 So in the prefabs, 161 00:09:08,090 --> 00:09:09,800 we have the player booklets. 162 00:09:09,800 --> 00:09:12,650 Just use that for now, the fire position, 163 00:09:12,650 --> 00:09:14,860 let me add right-click, 164 00:09:14,855 --> 00:09:16,775 create an empty game object. 165 00:09:16,775 --> 00:09:19,265 And I'm going to put it right here, 166 00:09:19,265 --> 00:09:20,815 are run almost right here. 167 00:09:20,810 --> 00:09:28,370 So this will be the fire position on the enemy. 168 00:09:28,370 --> 00:09:30,710 We provide him with the FAR position 169 00:09:30,710 --> 00:09:33,730 defined between shots would be 1 second. We will save that. 170 00:09:33,725 --> 00:09:42,025 And now we are going to make sure that he is not a, made an attacker. 171 00:09:42,020 --> 00:09:44,770 Let's run the game and see what happens. 172 00:09:44,765 --> 00:09:47,185 So now, there you go. 173 00:09:47,180 --> 00:09:49,820 You can see that he is instantiating the bullet, 174 00:09:49,820 --> 00:09:53,930 but He's shooting himself and the face. 175 00:09:53,930 --> 00:09:55,910 So if I pause this for a second, 176 00:09:55,910 --> 00:09:57,530 you can see that the five position, 177 00:09:57,530 --> 00:09:59,450 that's how it's being directed. 178 00:09:59,450 --> 00:10:05,660 And we know that the players bullet only traveled in the right direction. 179 00:10:05,660 --> 00:10:07,100 I know it's kind of funny. 180 00:10:07,100 --> 00:10:09,440 Let's try this a different way. 181 00:10:09,440 --> 00:10:11,060 But in any case, 182 00:10:11,060 --> 00:10:15,350 let's not worry about that too much for now because in the next video we'll be 183 00:10:15,350 --> 00:10:21,110 creating proper enemy bullets that will actually far towards the player or not. 184 00:10:21,110 --> 00:10:23,330 Even bullets will create the projectile, 185 00:10:23,330 --> 00:10:25,480 which is the ninth of the enemy. 186 00:10:25,475 --> 00:10:29,315 He'll be throwing it as the player and not shooting himself. 187 00:10:29,315 --> 00:10:33,655 But you can see right now that this is working using the Colton. 188 00:10:33,650 --> 00:10:36,410 If I click back on the enemy right here, 189 00:10:36,410 --> 00:10:40,000 you can see that I can increase the time between shots to 2. 190 00:10:39,995 --> 00:10:43,795 So now every two seconds we have this attack. 191 00:10:43,790 --> 00:10:46,370 So I hope you enjoyed the video. 192 00:10:46,370 --> 00:10:49,100 I know the shooting mechanic isn't perfect, 193 00:10:49,100 --> 00:10:51,740 but as I said in the next video, 194 00:10:51,740 --> 00:10:53,410 we'll be creating better bullets. 195 00:10:53,405 --> 00:10:56,985 I hope you are committing all of your changes. 196 00:10:56,989 --> 00:11:01,659 And in the next video we'll be making a proper enemy bullets, 197 00:11:01,655 --> 00:11:03,685 Gentiles, or whatever you wanna call it. 198 00:11:03,680 --> 00:11:06,180 So I'll see you then.