WEBVTT 00:00.360 --> 00:01.680 -: Hello and welcome 00:01.680 --> 00:04.770 to the first module of this course, "Self-Driving Car." 00:04.770 --> 00:08.280 Now that you have PyTorch and Kivy installed on your system, 00:08.280 --> 00:11.310 we are ready to start implementing this self-driving car. 00:11.310 --> 00:13.590 And I can tell you we have an exciting adventure 00:13.590 --> 00:14.700 ahead of us. 00:14.700 --> 00:17.580 So the first thing we're gonna do now before we start 00:17.580 --> 00:20.310 is set the right folder as working directory. 00:20.310 --> 00:21.390 That's very important 00:21.390 --> 00:24.990 because we are gonna have three files to implement this car. 00:24.990 --> 00:27.480 And all the cars are connected to each other. 00:27.480 --> 00:29.460 So when you execute a file 00:29.460 --> 00:31.050 it will take the classes, functions, 00:31.050 --> 00:33.150 and objects from another file 00:33.150 --> 00:36.750 and this other file has to be in the same working directory 00:36.750 --> 00:39.090 has to file that you're executing. 00:39.090 --> 00:41.790 That's why it's very important to have one same folder 00:41.790 --> 00:43.050 with all the files, 00:43.050 --> 00:45.570 and that is your working directory folder. 00:45.570 --> 00:46.980 So let's just get this done, 00:46.980 --> 00:49.260 and then we will be able to start. 00:49.260 --> 00:51.930 So first thing you do is go to File Explorer here, 00:51.930 --> 00:53.280 that's this window. 00:53.280 --> 00:56.010 And then you will probably be on your desktop. 00:56.010 --> 00:58.590 So right now, as you can see, I'm on my desktop 00:58.590 --> 01:00.360 or maybe you'll be in your Documents. 01:00.360 --> 01:02.550 But anyway, you have to find the folder 01:02.550 --> 01:05.070 that contains your artificial intelligence 01:05.070 --> 01:07.620 A-Z template folder that you downloaded 01:07.620 --> 01:11.010 from the SDS website that Kiel walk you through. 01:11.010 --> 01:15.900 So just find this folder, then open it from File Explorer, 01:15.900 --> 01:18.750 then go to module one, self-driving car. 01:18.750 --> 01:20.160 And then there you go. 01:20.160 --> 01:22.410 This module one self-driving car folder 01:22.410 --> 01:24.150 contains three files. 01:24.150 --> 01:26.580 That's the three files that are connected to each other 01:26.580 --> 01:29.490 to implement, not only the self-driving car on the map, 01:29.490 --> 01:31.410 but also the brain of the car, 01:31.410 --> 01:34.740 that is the AI that will be integrated to the car. 01:34.740 --> 01:37.200 And so this folder containing this three files 01:37.200 --> 01:39.660 is your working directory folder. 01:39.660 --> 01:40.830 And now to make sure 01:40.830 --> 01:43.470 that this folder is set as working directory, 01:43.470 --> 01:45.510 you can click on the tool button here 01:45.510 --> 01:47.460 and then restart kernel. 01:47.460 --> 01:48.960 Then you can click on yes, 01:48.960 --> 01:49.920 and there you go, 01:49.920 --> 01:51.780 Now you're sure a 100% 01:51.780 --> 01:54.870 that this folder containing your three files 01:54.870 --> 01:56.910 is set as working directory. 01:56.910 --> 01:59.100 Okay, and so now before we start, 01:59.100 --> 02:01.530 I would just like to explain quickly what are 02:01.530 --> 02:02.640 these three files. 02:02.640 --> 02:07.127 So as you probably recognized the first one here, ai.py, 02:07.127 --> 02:10.140 is the file that contains the brain of the car. 02:10.140 --> 02:11.370 So you know that's in this file 02:11.370 --> 02:14.490 that we will implement the artificial intelligence 02:14.490 --> 02:15.990 that will be integrated to the car. 02:15.990 --> 02:18.240 So that's why I'm calling it the brain of the car 02:18.240 --> 02:20.850 because this artificial intelligence is based 02:20.850 --> 02:22.140 on a neural network. 02:22.140 --> 02:23.220 So it will be like the car 02:23.220 --> 02:25.140 will have a neural network inside of it. 02:25.140 --> 02:26.880 That's why I like to call it, brain. 02:26.880 --> 02:30.090 Then the second file here is a Kivy file, 02:30.090 --> 02:33.330 card it KV and you cannot open it here in Spyder, 02:33.330 --> 02:35.790 but you can open it from a text editor. 02:35.790 --> 02:37.530 And actually that's what I'm gonna do right now. 02:37.530 --> 02:40.440 I'm opening it with Sublime Text. 02:40.440 --> 02:42.630 There we go. That is Sublime Text. 02:42.630 --> 02:46.350 And this is this card that KV file opens in Sublime Text. 02:46.350 --> 02:47.760 For those of you who are on Windows, 02:47.760 --> 02:50.880 you can open it with Notepad++. 02:50.880 --> 02:53.460 So here is what the KV code looks like. 02:53.460 --> 02:55.710 We're not going to focus on it in this course 02:55.710 --> 02:58.380 because this is only related to KV, 02:58.380 --> 03:00.750 but basically to understand what's going on here, 03:00.750 --> 03:04.050 well, as you can see we create several objects 03:04.050 --> 03:05.520 that will be on the map. 03:05.520 --> 03:08.700 So for example, this first object here is the car. 03:08.700 --> 03:10.800 And for this car you can define some variables 03:10.800 --> 03:13.500 like the angle, that is the angle of rotation. 03:13.500 --> 03:15.240 Then you can define the shape that you 03:15.240 --> 03:16.290 want your car to have. 03:16.290 --> 03:19.830 So it will be rectangle, like the basic shape of a car. 03:19.830 --> 03:21.570 Then you have some other objects, 03:21.570 --> 03:23.400 ball one, ball two and ball three. 03:23.400 --> 03:26.880 So these three balls here will be, as you will see later, 03:26.880 --> 03:28.890 the sensors of the car 03:28.890 --> 03:31.950 because the car will have sensors that will detect 03:31.950 --> 03:34.170 if there is some obstacles around the car. 03:34.170 --> 03:37.770 So these three balls here are just to highlight the sensors 03:37.770 --> 03:38.603 on the car. 03:38.603 --> 03:39.436 So we will see them 03:39.436 --> 03:42.810 and besides I set a different color for each of them. 03:42.810 --> 03:45.180 And then we have a last object, 03:45.180 --> 03:48.060 which is to connect all the previous objects together 03:48.060 --> 03:48.893 to make the car. 03:48.893 --> 03:51.690 Because the sensors will be attached to the car, 03:51.690 --> 03:55.050 so that when the car moves while the sensor moves as well. 03:55.050 --> 03:57.660 Alright, but this is not the most important here. 03:57.660 --> 04:00.120 So we are gonna move on to Python. 04:00.120 --> 04:02.340 This is just to show you what Kivy looks like. 04:02.340 --> 04:03.810 And this file of course 04:03.810 --> 04:06.420 will be connected to our other files. 04:06.420 --> 04:07.800 And mostly it will be connected 04:07.800 --> 04:12.150 to the third file map.py, which is this one right here. 04:12.150 --> 04:14.160 And map.py, what is it? 04:14.160 --> 04:16.680 Well, this is where we make the whole map 04:16.680 --> 04:17.970 and also the whole game 04:17.970 --> 04:19.920 because you will see that we will be playing 04:19.920 --> 04:21.210 some games with the car. 04:21.210 --> 04:23.310 You know, we will give it some challenges 04:23.310 --> 04:26.580 like avoiding some obstacles or doing some round trips 04:26.580 --> 04:29.880 between two destinations on a more and more difficult road. 04:29.880 --> 04:31.170 So we will make a game 04:31.170 --> 04:33.870 and that game happens in this big file here. 04:33.870 --> 04:35.880 So this file is important, 04:35.880 --> 04:38.100 therefore we're gonna see it in details. 04:38.100 --> 04:41.520 However, since this is not directly related to AI 04:41.520 --> 04:43.110 we will not code it line by line, 04:43.110 --> 04:45.900 and we'll just explain each line of code. 04:45.900 --> 04:47.190 Besides in the template folder, 04:47.190 --> 04:50.880 you'll find the same code as this one but commented. 04:50.880 --> 04:52.860 So each line of code will be commented. 04:52.860 --> 04:55.050 So that if you're interested in knowing how to 04:55.050 --> 04:58.170 develop a game within a Kivy application, 04:58.170 --> 05:00.210 well you will be able to understand everything 05:00.210 --> 05:01.500 that we do here. 05:01.500 --> 05:02.640 But what's important also is 05:02.640 --> 05:05.430 that not only we make the map and the game, 05:05.430 --> 05:09.990 but also we make some important connections between the map 05:09.990 --> 05:13.440 and the future AI that we will implement afterwards. 05:13.440 --> 05:16.110 And by the way, this is much more important, 05:16.110 --> 05:19.140 and therefore we will implement it step-by-step. 05:19.140 --> 05:21.990 We will write together each of these lines of codes. 05:21.990 --> 05:22.823 But for the map, 05:22.823 --> 05:25.470 I will just describe all the code sections here 05:25.470 --> 05:26.820 and that's what I will do 05:26.820 --> 05:29.340 in the next section right after this tutorial. 05:29.340 --> 05:31.770 I think the next two tutorials are important 05:31.770 --> 05:33.630 for you to understand the connection 05:33.630 --> 05:36.510 between the map and the AI. 05:36.510 --> 05:38.490 All right, so I will be explaining all this 05:38.490 --> 05:39.600 in the next tutorial. 05:39.600 --> 05:41.523 And until then, enjoy AI.