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These are the user uploaded subtitles that are being translated: 1 1 00:00:04,500 --> 00:00:08,127 In this video, we're gonna write our first line of code in Visual Studio. 2 2 00:00:08,127 --> 00:00:12,824 That's going to be print Hello World, and then when we go into Unity and 3 3 00:00:12,824 --> 00:00:17,459 click play, in the console area of Unity, it will print Hello World. 4 4 00:00:17,459 --> 00:00:21,788 This is a small but very significant step in making sure that our environment is set 5 5 00:00:21,788 --> 00:00:26,270 up correctly, and Unity and Visual Studio are working correctly together. 6 6 00:00:26,270 --> 00:00:28,850 Let's start by talking briefly about how Unity and 7 7 00:00:28,850 --> 00:00:30,880 Visual Studio relate to one another. 8 8 00:00:30,880 --> 00:00:32,800 So Unity is our game engine. 9 9 00:00:32,800 --> 00:00:36,450 This is where we say what the behaviors are in our game, and 10 10 00:00:36,450 --> 00:00:38,620 how all the pieces relate to one another. 11 11 00:00:38,620 --> 00:00:41,430 And how it all looks and how it all shapes up and comes together. 12 12 00:00:41,430 --> 00:00:45,060 One of the pieces that we use in Unity is our code, 13 13 00:00:45,060 --> 00:00:49,350 and our code is written in files that are .cs files. 14 14 00:00:49,350 --> 00:00:52,975 These are also called scripts, and they're a bunch of texts that say what 15 15 00:00:52,975 --> 00:00:57,095 are the rules and behaviors of the things that we want to have happen in our game. 16 16 00:00:57,095 --> 00:01:00,895 And the place that we write these scripts is in Visual Studio. 17 17 00:01:00,895 --> 00:01:05,640 Visual Studio is an IDE, that's an Integrated Developer Environment. 18 18 00:01:05,640 --> 00:01:10,560 And it gives us a whole lot of structure and tools to make our life easier, and 19 19 00:01:10,560 --> 00:01:12,500 to avoid making mistakes. 20 20 00:01:12,500 --> 00:01:16,267 So if you're a Mac user, this is a good time to point out that there's really not 21 21 00:01:16,267 --> 00:01:20,051 a lot of differences between Mac and PC when it comes to Unity and Visual Studio. 22 22 00:01:20,051 --> 00:01:23,612 But in the next video, Ben is gonna through those differences, so 23 23 00:01:23,612 --> 00:01:27,173 it's really clear what you're looking at and how it relates, and 24 24 00:01:27,173 --> 00:01:29,799 how it differs from what we're seeing on the PC. 25 25 00:01:29,799 --> 00:01:33,352 So let's go ahead and create our first scripts, and 26 26 00:01:33,352 --> 00:01:37,500 use Visual Studio to make a little bit of magic in Unity. 27 27 00:01:37,500 --> 00:01:41,620 So let's open up Unity Hub, few after you downloaded it, it might have a shortcut 28 28 00:01:41,620 --> 00:01:45,870 on your desktop, or you might need to navigate to it through your Program menu. 29 29 00:01:47,020 --> 00:01:49,940 When you open that up, you can see I've got a bunch of projects in here. 30 30 00:01:49,940 --> 00:01:53,970 If this is the first time you are using Hub, then yours is probably empty. 31 31 00:01:53,970 --> 00:01:55,430 And you wanna make sure that, 32 32 00:01:55,430 --> 00:01:59,930 under Installs, you got 2018 or later ready to go. 33 33 00:01:59,930 --> 00:02:02,750 So, from any of these tabs up hear, click on New. 34 34 00:02:02,750 --> 00:02:04,980 And that will allow us to create a new project, 35 35 00:02:04,980 --> 00:02:07,290 and it's gonna ask us where we want to save that. 36 36 00:02:07,290 --> 00:02:09,520 Let me just show you my directory here. 37 37 00:02:09,520 --> 00:02:12,180 I put that and then we can see exactly what's going on in here. 38 38 00:02:12,180 --> 00:02:15,450 So for me, I've created under my D drive. 39 39 00:02:15,450 --> 00:02:16,840 So just any of your drives. 40 40 00:02:16,840 --> 00:02:21,000 I've got a D drive here, I've created a photo called Repos which is short for 41 41 00:02:21,000 --> 00:02:23,550 the terminology repositories, which is something 42 42 00:02:23,550 --> 00:02:28,080 that'll be relevant later on in the course when we look at source control. 43 43 00:02:28,080 --> 00:02:31,740 And then within Repos, I've created Unity2D, 44 44 00:02:31,740 --> 00:02:35,650 which is where all of the projects from this course are going to go, 45 45 00:02:35,650 --> 00:02:38,170 and the first section we're working on isIntro_Setup. 46 46 00:02:38,170 --> 00:02:40,870 So, I encourage you to do a similar structure, 47 47 00:02:40,870 --> 00:02:43,705 have a Repos directory with our Unity2D course, 48 48 00:02:43,705 --> 00:02:48,584 and then for this particular section it's intro and setup, ready and running this. 49 49 00:02:48,584 --> 00:02:51,226 So when we go into start our new project, 50 50 00:02:51,226 --> 00:02:55,812 we click on the three little dots to the right of location, down here, 51 51 00:02:55,812 --> 00:03:00,710 and that will allow us to go and choose where we want to set that up. 52 52 00:03:00,710 --> 00:03:04,881 Go to DATA, or DATA, depending from where you're from, Repos, and 53 53 00:03:04,881 --> 00:03:07,370 then Unity2D, and then Intro_Setup. 54 54 00:03:07,370 --> 00:03:11,348 So I'm gonna just click on that once and select Project, and 55 55 00:03:11,348 --> 00:03:14,270 we'll use that as our project location. 56 56 00:03:14,270 --> 00:03:16,940 Now it's really important to know that a Unity Project 57 57 00:03:16,940 --> 00:03:21,200 is a folder with a set of directories and a set of files with inside it. 58 58 00:03:21,200 --> 00:03:26,090 When we start a project, it's not just one file, it's a whole bunch of files. 59 59 00:03:26,090 --> 00:03:29,540 We're gonna call the project name, here we'll call this Hello World, 60 60 00:03:29,540 --> 00:03:33,050 as all good programming first steps should be a Hello World, and 61 61 00:03:33,050 --> 00:03:37,350 under Template we're going to select 2D, and then click Create project. 62 62 00:03:40,796 --> 00:03:43,095 There might be a little bit of loading, a little bit of setup, 63 63 00:03:43,095 --> 00:03:45,590 a little bit of importing, particularly if it's the first time. 64 64 00:03:45,590 --> 00:03:48,450 So bear with that, it should do all of that automatically, and 65 65 00:03:48,450 --> 00:03:50,890 then we will be into the engine. 66 66 00:03:50,890 --> 00:03:53,040 Okay, so that started up our project. 67 67 00:03:53,040 --> 00:03:56,220 Let's just have a quick look in our directory to see what happened there 68 68 00:03:56,220 --> 00:03:57,530 in the Intro_Setup. 69 69 00:03:57,530 --> 00:04:01,420 We now have a Hello World folder, I've got a couple of other things in here that you 70 70 00:04:01,420 --> 00:04:03,310 won't have yet, cuz I've put them in. 71 71 00:04:03,310 --> 00:04:05,890 But the important thing is to see that we've got a Hello World. 72 72 00:04:05,890 --> 00:04:08,920 Within that there's a whole bunch of folders that Unity's created for 73 73 00:04:08,920 --> 00:04:13,030 us, including the Assets folder, and that's where all of our information, 74 74 00:04:13,030 --> 00:04:16,130 all of our game assets, and artwork, and scripts. 75 75 00:04:16,130 --> 00:04:19,580 Everything is gonna go into Assets, so that's being created for us. 76 76 00:04:19,580 --> 00:04:22,670 If your layout looks different to mine, you can come up to the top right here, 77 77 00:04:22,670 --> 00:04:25,340 it says Layout, click on that button and find Default. 78 78 00:04:25,340 --> 00:04:29,390 When you click on Default, that should default everything back to the default 79 79 00:04:29,390 --> 00:04:32,520 windows layout, so it should look the same as what I have here. 80 80 00:04:32,520 --> 00:04:38,160 So from anywhere down in this Assets area down here, right click, go to Create, 81 81 00:04:38,160 --> 00:04:42,520 and then find C# Script, click on that, and you'll see it create a script. 82 82 00:04:42,520 --> 00:04:46,680 Now, important message, we wanna typing straight away the name of our script, 83 83 00:04:46,680 --> 00:04:48,850 don't click anywhere else and don't hit Enter. 84 84 00:04:48,850 --> 00:04:53,510 Cuz if you do that, you'll accidentally create this file with the default name. 85 85 00:04:53,510 --> 00:04:54,930 And if we create it with the default name, 86 86 00:04:54,930 --> 00:04:59,470 when we go and rename it in a moment, it will cause some issues and some errors. 87 87 00:04:59,470 --> 00:05:04,300 So you wanna make sure that while the script name is still highlighted and blue, 88 88 00:05:04,300 --> 00:05:06,620 that you start typing straight away. 89 89 00:05:06,620 --> 00:05:10,850 We're gonna change the name of this to HelloWorld, no spaces. 90 90 00:05:10,850 --> 00:05:12,877 And I've put capital H and capital W. 91 91 00:05:12,877 --> 00:05:17,019 And you know you've created your script correctly if the name underneath 92 92 00:05:17,019 --> 00:05:21,559 the script there matches the name we see over in inspector you can see public class 93 93 00:05:21,559 --> 00:05:22,410 HelloWorld. 94 94 00:05:22,410 --> 00:05:25,750 So if its Hello World there ,and HelloWorld under your script, success, 95 95 00:05:25,750 --> 00:05:26,740 we are ready to go. 96 96 00:05:26,740 --> 00:05:29,180 If they are different, Unity is gonna be a bit upset and 97 97 00:05:29,180 --> 00:05:32,300 you need to delete your script and start that process again. 98 98 00:05:32,300 --> 00:05:34,490 So let's double click on HelloWorld. 99 99 00:05:35,690 --> 00:05:36,920 It'll open up Visual Studio. 100 100 00:05:36,920 --> 00:05:40,120 There might be a little bit of initial setup and initial loading. 101 101 00:05:40,120 --> 00:05:41,580 Okay, and there's a lot going on here. 102 102 00:05:41,580 --> 00:05:44,420 There's a few things we don't need, so I'm gonna close over here, 103 103 00:05:44,420 --> 00:05:47,340 my Solution Explorer, just x out on that. 104 104 00:05:47,340 --> 00:05:49,510 And my Team Explorer and Properties, 105 105 00:05:49,510 --> 00:05:52,978 all of those things we don't need at the moment, so I'm gonna close that out. 106 106 00:05:52,978 --> 00:05:55,550 So this script that we created over here in Unity 107 107 00:05:55,550 --> 00:05:59,360 already comes with a bunch of text, a bunch of information on it. 108 108 00:05:59,360 --> 00:06:01,010 We're not gonna go into the details of that yet, 109 109 00:06:01,010 --> 00:06:03,050 I promise you we'll get into all of that. 110 110 00:06:03,050 --> 00:06:06,510 And in no time you'll understand everything that's going on within here. 111 111 00:06:06,510 --> 00:06:11,352 But for now, we're just going to get our hands dirty by writing a line of code. 112 112 00:06:11,352 --> 00:06:15,988 So, I want you to click on line number 9, clicking there underneath Start 113 113 00:06:15,988 --> 00:06:20,639 verses void start, just follow along with me here, hands dirty, right. 114 114 00:06:20,639 --> 00:06:23,637 Our first line of code and type print, and 115 115 00:06:23,637 --> 00:06:28,990 after that we're gonna type open brackets or open parenthesis. 116 116 00:06:28,990 --> 00:06:32,910 And then quotation mark, and you can see cuz we are in 117 117 00:06:32,910 --> 00:06:37,530 our best friend of Visual Studio, it knows what we wanna do. 118 118 00:06:37,530 --> 00:06:41,450 It's already give us a closed bracket and a closed quotation mark. 119 119 00:06:41,450 --> 00:06:43,730 And it's already giving us some information down here saying, 120 120 00:06:43,730 --> 00:06:46,390 hey you might wanna know this, and this might be useful. 121 121 00:06:46,390 --> 00:06:47,510 This is great stuff. 122 122 00:06:47,510 --> 00:06:50,590 Over time you'll recognize that, and you'll see this fantastic. 123 123 00:06:50,590 --> 00:06:52,650 For now, don't worry about all that information coming out. 124 124 00:06:52,650 --> 00:06:56,590 We're gonna finish typing here, we'll type Hello World. 125 125 00:06:56,590 --> 00:07:01,311 And then down the end of our statement here, we need to type a ;, 126 126 00:07:01,311 --> 00:07:05,060 and you can see when we did that the little squiggly red line went away. 127 127 00:07:05,060 --> 00:07:06,890 I'll do that one more time. 128 128 00:07:06,890 --> 00:07:10,580 When we've got no ; there's a squiggly red line seen, and 129 129 00:07:10,580 --> 00:07:14,560 if you mouse over that, you can see ;expected. 130 130 00:07:14,560 --> 00:07:17,763 So this is our best buddy Visual Studio trying to help us out here, 131 131 00:07:17,763 --> 00:07:20,511 saying I really think you should put a semicolon there. 132 132 00:07:20,511 --> 00:07:21,447 Yes, we do need to do one of those. 133 133 00:07:21,447 --> 00:07:23,432 Okay then, I want to hit Save, and 134 134 00:07:23,432 --> 00:07:26,940 you can see the little star that was up here went away. 135 135 00:07:26,940 --> 00:07:32,860 And, we have a green line that appears to say that we have saved our script. 136 136 00:07:32,860 --> 00:07:35,840 Now, back over into Unity this is a script we're working on. 137 137 00:07:35,840 --> 00:07:39,270 It's been saved, now there's one last step we need to do. 138 138 00:07:39,270 --> 00:07:42,120 Our script just sitting on it's own isn't doing anything, 139 139 00:07:42,120 --> 00:07:45,690 we need to bring it into our world by attaching it to a game object. 140 140 00:07:45,690 --> 00:07:48,009 And, the only game object we've got is our camera. 141 141 00:07:48,009 --> 00:07:53,280 So, if your sample scene has closed, you can click the little arrow next to it. 142 142 00:07:53,280 --> 00:07:56,460 That'll open it up to show all of the things in the hierarchy underneath 143 143 00:07:56,460 --> 00:08:00,555 Sample Scene, and you can see we have main camera. 144 144 00:08:00,555 --> 00:08:03,742 That's our game object, the only game object in the moment. 145 145 00:08:03,742 --> 00:08:08,251 So we're going to drag our HelloWorld script on to our main camera at 146 146 00:08:08,251 --> 00:08:09,209 the top here. 147 147 00:08:09,209 --> 00:08:13,264 We could have also dragged it over here into the inspector while we're selected on 148 148 00:08:13,264 --> 00:08:16,687 main camera, either these ways would have served the same purpose. 149 149 00:08:16,687 --> 00:08:20,113 You can see now when clicked on main camera within the inspector, 150 150 00:08:20,113 --> 00:08:22,310 we've got our HelloWorld script there. 151 151 00:08:22,310 --> 00:08:26,860 If you come out to the top and click the Play button, and 152 152 00:08:26,860 --> 00:08:30,700 open up the Console here, we haven't talked about the Console yet. 153 153 00:08:30,700 --> 00:08:35,020 The Console is what allows us to see the messages, and 154 154 00:08:35,020 --> 00:08:37,740 the information allows us to debug our game. 155 155 00:08:37,740 --> 00:08:39,580 It's a great place to print things out. 156 156 00:08:39,580 --> 00:08:42,580 You can see Hello World is written right in there. 157 157 00:08:42,580 --> 00:08:46,270 Success, we have created our first line of code. 158 158 00:08:46,270 --> 00:08:47,440 Now I have a challenge for you, and 159 159 00:08:47,440 --> 00:08:51,060 what I would like you to do is to print Hello YourName. 160 160 00:08:51,060 --> 00:08:54,270 So to modify our Hello World code, 161 161 00:08:54,270 --> 00:08:58,070 instead of printing out Hello World, I'd like it to print out YourName. 162 162 00:08:58,070 --> 00:09:02,024 And obviously it wouldn't say YourName, it would saying Hello Rick, or Hello Fred, or 163 163 00:09:02,024 --> 00:09:03,885 Hello Bob, whatever your name might be. 164 164 00:09:03,885 --> 00:09:07,711 So, pause the video now, go into the script, 165 165 00:09:07,711 --> 00:09:12,227 change from Hello World to Hello YourName, Save, and 166 166 00:09:12,227 --> 00:09:18,538 then go back into Unity and click Play, and see that it tops Hello YourName. 167 167 00:09:18,538 --> 00:09:23,290 And after you do that, come back to the video and play the video again, and 168 168 00:09:23,290 --> 00:09:28,827 I will my approach doing that as well, and we can finish off this excercise together. 169 169 00:09:28,827 --> 00:09:30,029 So, I will see you in a moment. 170 170 00:09:32,621 --> 00:09:33,880 Okay, welcome back. 171 171 00:09:33,880 --> 00:09:35,590 We'll make sure we click out of play mode. 172 172 00:09:35,590 --> 00:09:39,350 I'd left ourselves in play mode, and I really hope that you did that challenge. 173 173 00:09:39,350 --> 00:09:43,307 I'm gonna ask you to do a challenge in each lecture in this course, and 174 174 00:09:43,307 --> 00:09:47,990 it's super super important that you jump in and take on these challenges. 175 175 00:09:47,990 --> 00:09:51,330 Okay, so I'm back over in VisualStudio here, and 176 176 00:09:51,330 --> 00:09:54,320 you can see our statement print("Hello World"), I'm just gonna hop in here and 177 177 00:09:54,320 --> 00:09:57,940 change this to "Hello Rick" and hit Save. 178 178 00:09:57,940 --> 00:10:01,790 Back over into Unity, we don't need to attach it to the main camera again, 179 179 00:10:01,790 --> 00:10:02,950 cuz it's already attached there. 180 180 00:10:02,950 --> 00:10:05,498 If we click on the main camera, you can see Hello World, 181 181 00:10:05,498 --> 00:10:07,573 it's been updated because we've saved it. 182 182 00:10:07,573 --> 00:10:12,719 And then when I click play, you should see Hello Rick down here. 183 183 00:10:12,719 --> 00:10:16,574 And this really was a quick exercise to make sure that our environment is 184 184 00:10:16,574 --> 00:10:17,830 set up correctly. 185 185 00:10:17,830 --> 00:10:19,680 In the next section of the course, Number Wizard, 186 186 00:10:19,680 --> 00:10:22,650 we'll be looking at all the things that we went over very quickly here. 187 187 00:10:22,650 --> 00:10:23,600 About the inspector, 188 188 00:10:23,600 --> 00:10:27,880 about the layout, in terms of just things like semi-colons, why are we doing them? 189 189 00:10:27,880 --> 00:10:30,690 So, all of that information we'll be covering in great detail 190 190 00:10:30,690 --> 00:10:32,240 in the next section of the course. 191 191 00:10:32,240 --> 00:10:35,048 During the next video Ben is going to be talking about Mac differences, 192 192 00:10:35,048 --> 00:10:37,650 if you are a Mac person, that's a great video to watch. 193 193 00:10:37,650 --> 00:10:40,670 If not, you can skip that video and go into the next video in the course. 194 194 00:10:40,670 --> 00:10:42,150 Great work, and I will see you again soon. 20533