1 00:00:03,070 --> 00:00:03,610 Hello again. 2 00:00:03,610 --> 00:00:05,350 In this lecture, we're doing something crazy. 3 00:00:05,350 --> 00:00:10,930 We're sterilizing our variables so that we can move our steer speed left and right within the inspector. 4 00:00:10,930 --> 00:00:15,340 So I can see how our game is going to look when we properly implement our steering. 5 00:00:15,340 --> 00:00:16,660 So let's get started. 6 00:00:16,660 --> 00:00:21,100 Making your variables available in the inspector will save you a lot of time and also help a lot if 7 00:00:21,100 --> 00:00:25,570 you're working with someone on your team who maybe is wearing the design hat and doesn't want to dig 8 00:00:25,570 --> 00:00:27,580 around in the code to see what's going on. 9 00:00:27,580 --> 00:00:30,520 So what we're going to do is use something called serialised field. 10 00:00:30,520 --> 00:00:36,040 So if you jump back into driver X and I find move speed, give myself a space before that, use the 11 00:00:36,040 --> 00:00:42,220 open square braces and you can see that Visual Studio code is automatically added the closed saying, 12 00:00:42,220 --> 00:00:47,350 I think you want to put something within here, I'm going to type in serialize field and you can see 13 00:00:47,350 --> 00:00:50,200 I just type in C, R and then it knows what the remainder is. 14 00:00:50,200 --> 00:00:55,360 You can click on that or hit tab or hit spacebar and that will complete serialize field and serialize 15 00:00:55,360 --> 00:00:57,310 field is an example of an attribute. 16 00:00:57,310 --> 00:01:02,710 This square braces, when we put it before a variable or a class or a method, shows that we're adding 17 00:01:02,710 --> 00:01:06,370 some sort of attribute to the thing that is following it. 18 00:01:06,370 --> 00:01:13,240 So Serialize Field is adding the attribute that allows us to serialize, in other words, right to disk 19 00:01:13,540 --> 00:01:14,740 this particular variable. 20 00:01:14,740 --> 00:01:17,230 And when we do that, we can access it in the inspector. 21 00:01:17,230 --> 00:01:22,180 So I'm going to save jump back into unity and you should see give it a moment to think about things. 22 00:01:22,180 --> 00:01:27,010 Make sure you clicked on your vehicle or your player you can see on the driver script. 23 00:01:27,010 --> 00:01:32,860 Now we have move speed and the number in here will be whatever we initialized this at, which is cool. 24 00:01:32,860 --> 00:01:40,450 Now I'm going to change the move speed to say 0.03 and then click on play and that should change my 25 00:01:40,450 --> 00:01:40,810 speed. 26 00:01:40,810 --> 00:01:47,530 So I'm moving quicker in this loop and then if I change it while I'm still in play mode to increase 27 00:01:47,530 --> 00:01:52,540 it while it goes way up, the screen goes really far so you can change it while it's in motion, which 28 00:01:52,540 --> 00:01:53,320 is pretty cool. 29 00:01:53,320 --> 00:01:55,090 I'm going to leave it at 0.03. 30 00:01:55,090 --> 00:01:59,650 Now, what I want to highlight here as well is as soon as you change this within the inspector, that 31 00:01:59,650 --> 00:02:00,820 will be the new value. 32 00:02:00,820 --> 00:02:05,560 Despite the fact when I go back here into my code, it's been initialized at 0.01. 33 00:02:05,560 --> 00:02:12,160 This is being overwritten by the value that I'm saving to my disk, which says 0.03. 34 00:02:12,160 --> 00:02:15,820 So sometimes that can get you a little bit of confusion where you're looking in your code and you're 35 00:02:15,820 --> 00:02:19,210 saying, hang on a minute, 0.01, why is it going so fast? 36 00:02:19,210 --> 00:02:24,820 As soon as you modify the value in the inspector, that becomes the overriding value and that's the 37 00:02:24,820 --> 00:02:25,960 one it's going to be using. 38 00:02:25,960 --> 00:02:27,580 Okay, so we've done that for move speed. 39 00:02:27,580 --> 00:02:29,260 Let's do that for steer speed. 40 00:02:29,260 --> 00:02:35,470 And this is time for a challenge for you serialize your steer speed using serialized field make steer 41 00:02:35,470 --> 00:02:37,450 speed available in the inspector. 42 00:02:37,450 --> 00:02:40,630 And then I've got another kind of quirky challenge for you here. 43 00:02:40,630 --> 00:02:43,060 Drive your car using the inspector. 44 00:02:43,060 --> 00:02:49,600 See if you can keep it on the screen for 10 seconds by modifying the value of the steer speed while 45 00:02:49,600 --> 00:02:50,830 you are playing the game. 46 00:02:50,830 --> 00:02:51,250 There you go. 47 00:02:51,250 --> 00:02:52,120 Take on that challenge. 48 00:02:52,120 --> 00:02:53,380 I'll see you back here when you're done. 49 00:02:56,010 --> 00:02:56,340 Okay. 50 00:02:56,340 --> 00:03:00,540 First step, we're going to put a serialized field in front of our steer speed. 51 00:03:00,540 --> 00:03:05,250 So serialize field hit tab to autocomplete complete click on save. 52 00:03:05,280 --> 00:03:08,730 Pretty straightforward to add that bit of code, jump back over into unity. 53 00:03:08,730 --> 00:03:13,860 It'll think for a second we should now have a second value, which is my steer speed. 54 00:03:13,860 --> 00:03:16,290 I'm going to pop my move speed down a little bit. 55 00:03:16,290 --> 00:03:17,250 I'm going to cheat a bit here. 56 00:03:17,250 --> 00:03:19,020 I'm going to move speed .01. 57 00:03:19,020 --> 00:03:20,600 So we're going a little bit slower now. 58 00:03:20,610 --> 00:03:21,210 Click on play. 59 00:03:21,210 --> 00:03:22,080 I'm going to get ready. 60 00:03:22,080 --> 00:03:26,790 Oversteer speed, it's doing some left so I'm going to turn it to increase it. 61 00:03:26,790 --> 00:03:30,600 Now I need to decrease it so it doesn't turn as much and then back the other way. 62 00:03:30,600 --> 00:03:31,620 That will turn it the other way. 63 00:03:31,620 --> 00:03:36,630 Okay, so we've got the fundamentals of steering our vehicle is a little bit clunky and not exactly 64 00:03:36,630 --> 00:03:40,650 how we'd want our player to play the game, but it is working and looks pretty cool. 65 00:03:40,650 --> 00:03:42,720 It's a car driving game and we can do this by. 66 00:03:42,720 --> 00:03:48,300 We're playing around with moving our steer speed in the inspector and obviously the next step is for 67 00:03:48,300 --> 00:03:53,280 us to hook this up so the player can use keys on their keyboard because obviously the player is not 68 00:03:53,280 --> 00:03:56,190 going to have access to the unity inspector when they're playing around. 69 00:03:56,190 --> 00:03:59,640 But this is the fundamental we've got move speed to go faster or slower. 70 00:03:59,640 --> 00:04:01,560 We've got steer speed to move left or right. 71 00:04:01,560 --> 00:04:02,400 So there we go. 72 00:04:02,400 --> 00:04:03,690 I'll see you in the next lecture.