1 00:00:00,000 --> 00:00:04,160 Welcome back, my fellow game developers. 2 00:00:04,155 --> 00:00:08,045 In this video, we are going to add automatic firing. 3 00:00:08,040 --> 00:00:11,600 So you can see right here that we have a time between shots. 4 00:00:11,595 --> 00:00:14,195 How much time do you want between shots? I can hear you. 5 00:00:14,190 --> 00:00:15,770 You want to say 0.5? 6 00:00:15,765 --> 00:00:17,595 Okay, sir, There you go. 7 00:00:17,595 --> 00:00:18,615 We play run. 8 00:00:18,615 --> 00:00:19,995 We had the Play button. 9 00:00:19,995 --> 00:00:21,515 We run the gain, 10 00:00:21,510 --> 00:00:24,390 and we hold down the left mouse button. 11 00:00:24,390 --> 00:00:27,480 And there you go. You can see that we should 12 00:00:27,480 --> 00:00:31,080 every single frame and you can see that they are very consistent. 13 00:00:31,080 --> 00:00:35,180 So I'm not playing a game and here I'm holding down the button and it 14 00:00:35,175 --> 00:00:39,855 keeps firing every 0.5 seconds or each have second, 15 00:00:39,855 --> 00:00:41,335 we keep firing able. 16 00:00:41,335 --> 00:00:43,405 So let's not waste any more time. 17 00:00:43,400 --> 00:00:46,420 We're going to learn about counters. 18 00:00:46,415 --> 00:00:48,955 And let's get started. 19 00:00:48,950 --> 00:00:50,750 O k. 20 00:00:50,750 --> 00:00:53,440 So we want to have the ability to 21 00:00:53,435 --> 00:00:58,135 automatically fire bullets when the mouse button is held down. 22 00:00:58,130 --> 00:01:01,190 So currently whenever we press the button, 23 00:01:01,190 --> 00:01:03,020 once we can shoot, 24 00:01:03,020 --> 00:01:05,200 but what we want is to have some kind of 25 00:01:05,195 --> 00:01:08,935 automatic firing while we are holding down the button, 26 00:01:08,930 --> 00:01:11,060 just like a rifle, 27 00:01:11,060 --> 00:01:14,180 even though we are using a shotgun right here, 28 00:01:14,180 --> 00:01:18,470 we'll just use our imagination and imagine that this is an automatic shotgun. 29 00:01:18,470 --> 00:01:22,570 And while we're holding down the button, it keeps firing. 30 00:01:22,565 --> 00:01:25,685 So how are we going to do this? 31 00:01:25,685 --> 00:01:27,685 Currently, if you look right here, 32 00:01:27,680 --> 00:01:29,350 you can see that this method, 33 00:01:29,345 --> 00:01:31,085 the get mouse button down, 34 00:01:31,085 --> 00:01:36,355 returns a true during the frame the user pressed the given mouse button. 35 00:01:36,350 --> 00:01:39,980 So it only returns true once in 36 00:01:39,980 --> 00:01:43,790 the frame that the player or the user has pressed the button. 37 00:01:43,790 --> 00:01:49,060 What we want is we want to use something called the input dot get mouse button. 38 00:01:49,055 --> 00:01:52,525 So notice this was mouse button down. 39 00:01:52,520 --> 00:01:55,520 This is the get mouse button. 40 00:01:55,520 --> 00:01:57,050 And if you read the description, 41 00:01:57,050 --> 00:02:02,830 you can see that it returns a true whether the given mouse button is held down. 42 00:02:02,825 --> 00:02:05,005 So while we are holding down, 43 00:02:05,000 --> 00:02:06,640 this keeps returning true. 44 00:02:06,635 --> 00:02:12,055 And this will allow us to keep instantiating bullets all the time, every single frame. 45 00:02:12,050 --> 00:02:15,230 But we come up to a problem. 46 00:02:15,230 --> 00:02:17,620 You've noticed that when we run the game, 47 00:02:17,615 --> 00:02:20,585 if you remember, we can see the stats right here. 48 00:02:20,585 --> 00:02:25,795 So we have about 800 to a thousand frames per second. 49 00:02:25,790 --> 00:02:27,670 So every single frame, 50 00:02:27,665 --> 00:02:30,145 while we are holding down the mouse button, 51 00:02:30,140 --> 00:02:32,930 we are going to be instantiating a bullet, 52 00:02:32,930 --> 00:02:34,400 which is very bad. 53 00:02:34,400 --> 00:02:38,740 So we are going to have around the 1000 bullets every single second. 54 00:02:38,735 --> 00:02:39,985 Now, it's fun. 55 00:02:39,980 --> 00:02:41,920 It's a very OOP weapon, 56 00:02:41,915 --> 00:02:43,955 but that's not what we want. 57 00:02:43,955 --> 00:02:47,515 We want to have a certain time between 58 00:02:47,510 --> 00:02:52,360 firing each book while we are holding down just like a real weapon. 59 00:02:52,355 --> 00:02:53,665 What's the mattering here? 60 00:02:53,660 --> 00:02:54,770 Okay, So no worries. 61 00:02:54,770 --> 00:02:57,590 I think this will sort itself out. Anyways. 62 00:02:57,590 --> 00:02:58,580 Let's start off. 63 00:02:58,580 --> 00:03:02,230 The first thing we're going to do is we'll create a serialized field, 64 00:03:02,225 --> 00:03:04,265 which is going to be a float, 65 00:03:04,265 --> 00:03:08,685 and it's going to be the time between shots. 66 00:03:08,689 --> 00:03:17,569 A second variable that we'll have as a private float and the shot counter. 67 00:03:17,570 --> 00:03:20,950 And what we'll do is as soon as we start, 68 00:03:20,945 --> 00:03:25,645 we are going to set the shot counter to be around 0, 69 00:03:25,640 --> 00:03:30,850 or we can set it immediately in here instead of setting it and the start. 70 00:03:30,845 --> 00:03:33,215 So we start off at 0. 71 00:03:33,215 --> 00:03:35,435 Now if we scroll down in here, 72 00:03:35,435 --> 00:03:38,905 we are going to create another condition. 73 00:03:38,900 --> 00:03:47,220 And we'll say that if the input dot get mouse button, 74 00:03:47,224 --> 00:03:51,564 which returns whether the given modes button is held down. 75 00:03:51,560 --> 00:03:56,030 And we also use the index 0 for the left mouse button. 76 00:03:56,030 --> 00:04:00,620 We are going to start using the shot counter and 77 00:04:00,620 --> 00:04:06,250 removing from it the time dot delta time. 78 00:04:06,245 --> 00:04:10,015 So do you remember when we use the plus equals 79 00:04:10,010 --> 00:04:13,790 somewhere up here when we were using the transform, 80 00:04:13,790 --> 00:04:14,960 now we don't have it. 81 00:04:14,960 --> 00:04:17,690 Well, this is similar to the plus equals. 82 00:04:17,690 --> 00:04:24,010 So this represents the shot counter minus Time.deltaTime. 83 00:04:24,005 --> 00:04:28,135 And you know what, I'm going to duplicate this, comment this out. 84 00:04:28,130 --> 00:04:33,320 And then I will make this a minuss equals. 85 00:04:33,320 --> 00:04:36,830 So you'll remember that these are the same things. 86 00:04:36,830 --> 00:04:42,170 And I'll even move it down next to the line right here. 87 00:04:42,170 --> 00:04:46,790 You can keep this as a reminder of why we are setting minus equals, 88 00:04:46,790 --> 00:04:48,880 plus equals and all of these things. 89 00:04:48,875 --> 00:04:52,975 It's much easier to read and it's much cooler 90 00:04:52,970 --> 00:04:54,890 and will make you much more professional 91 00:04:54,890 --> 00:04:57,050 looking whenever we are showing someone your game. 92 00:04:57,050 --> 00:04:59,000 So let's continue one, 93 00:04:59,000 --> 00:05:00,440 what do we need in here? 94 00:05:00,440 --> 00:05:02,750 While we are holding down the mouse button, 95 00:05:02,750 --> 00:05:06,160 the shot counter is being counted down. 96 00:05:06,155 --> 00:05:12,085 So what we want is whenever this shot counter ends or becomes 0, 97 00:05:12,080 --> 00:05:15,040 we want to fire a bullet and then 98 00:05:15,035 --> 00:05:19,625 refresh the shot counter back to the time between shots. 99 00:05:19,625 --> 00:05:22,525 So how are we going to do this? 100 00:05:22,520 --> 00:05:25,150 Instead of immediately instantiating, 101 00:05:25,145 --> 00:05:27,575 I'm going to issue a challenge. 102 00:05:27,575 --> 00:05:29,945 Was that a better transition than last time? 103 00:05:29,945 --> 00:05:33,875 Anyways, your challenge is to check if the counter has, 104 00:05:33,875 --> 00:05:39,045 and so create an if condition that checks the shot counter. 105 00:05:39,049 --> 00:05:43,489 If the shot counter is less than or equal to 0, 106 00:05:43,490 --> 00:05:45,530 why is it less than or equal to 0? 107 00:05:45,530 --> 00:05:48,770 You might be asking why not immediately 0? 108 00:05:48,770 --> 00:05:51,600 Well, because as we're counting.