1 00:00:00,210 --> 00:00:03,580 In this lesson we will be creating the course. 2 00:00:03,600 --> 00:00:06,980 First I want you to go to the models folder. 3 00:00:07,140 --> 00:00:09,540 We want to create a new python file. 4 00:00:09,600 --> 00:00:13,290 So right click on the folder and choose new. 5 00:00:13,290 --> 00:00:15,370 Then click on python file. 6 00:00:15,420 --> 00:00:17,500 Let's set the name to course and hit. 7 00:00:17,550 --> 00:00:26,170 OK now on this new file we'll start by importing the first one we'll be importing logging. 8 00:00:26,190 --> 00:00:31,820 Also we will be using time then from the drone app models base. 9 00:00:31,890 --> 00:00:36,430 We will import Singleton which we made in the previous lessons. 10 00:00:36,450 --> 00:00:39,060 Don't forget to set the logger to logging. 11 00:00:39,090 --> 00:00:43,660 Get logger underscore name based on PIP AIDS. 12 00:00:43,680 --> 00:00:50,100 We would need to set two black lines here but I don't think we can fit all the codes in the screen so 13 00:00:50,100 --> 00:00:54,420 I'll have to set aside the PEP 8 code stall for now. 14 00:00:54,420 --> 00:01:01,600 First we set a class called base course later on this lesson we will be creating different courses like 15 00:01:01,630 --> 00:01:03,350 course a and core speed. 16 00:01:03,780 --> 00:01:11,490 But this base class will be the base for all courses the middle class will be set to Singleton. 17 00:01:11,490 --> 00:01:19,260 Next we will set the edit followed by self name of the course and the drone that will be flying the 18 00:01:19,260 --> 00:01:22,230 course as an argument self. 19 00:01:22,230 --> 00:01:29,220 Name will be set to name so we can distinguish the courses we will set the status initially. 20 00:01:29,250 --> 00:01:31,630 This will be set to 0. 21 00:01:31,920 --> 00:01:41,280 The status will be used to operate the drone for example status 1 will be takeoff Status 2 will be flip. 22 00:01:41,280 --> 00:01:44,850 Also we want to check if the drone is flying through the course. 23 00:01:44,850 --> 00:01:47,370 So we set is running. 24 00:01:47,370 --> 00:01:49,080 This will be set to false. 25 00:01:49,110 --> 00:01:52,070 The game will be based on competing the time. 26 00:01:52,560 --> 00:01:54,300 So we need to get the start time. 27 00:01:54,300 --> 00:01:56,310 This we can set to None. 28 00:01:56,310 --> 00:02:02,280 Also we need to get the elapsed time also set to None. 29 00:02:02,280 --> 00:02:08,060 Lastly we set the drone to the drone attribute. 30 00:02:08,070 --> 00:02:12,760 Now we go on to define the start method once the race starts. 31 00:02:12,780 --> 00:02:18,870 We want to record the start time the start time will be set to the current time. 32 00:02:19,380 --> 00:02:25,190 Once the drone is in the race we want to change is running to true. 33 00:02:25,410 --> 00:02:28,230 Next we need a stop method. 34 00:02:28,320 --> 00:02:34,660 If the drone is not in the race we don't need to stop the drone so we can return false. 35 00:02:35,070 --> 00:02:38,240 If the drone is in the race we need to stop. 36 00:02:38,250 --> 00:02:43,560 So we set is running to false as we set the drone to stop. 37 00:02:43,560 --> 00:02:48,660 We need to set the status go back to zero again. 38 00:02:48,680 --> 00:02:52,070 Next we need to figure out how long the race is taking. 39 00:02:52,100 --> 00:03:00,260 So we set an update elapsed method if the drone is not in the race there is no elapsed time so we need 40 00:03:00,260 --> 00:03:02,670 to return a nun. 41 00:03:02,960 --> 00:03:09,020 If the drone is in the race we need to calculate the elapsed time which will be current time minus start 42 00:03:09,020 --> 00:03:10,110 time. 43 00:03:10,250 --> 00:03:13,280 Then the lapse time should be returned. 44 00:03:13,280 --> 00:03:17,120 Next will be the method to run the drone on the course. 45 00:03:17,120 --> 00:03:19,790 This will be underscore run. 46 00:03:19,790 --> 00:03:27,010 This method will be invoked from the courses to make the drone take off or to fly forward or back. 47 00:03:27,080 --> 00:03:31,830 So we want this method to override in this base class. 48 00:03:31,850 --> 00:03:39,840 We will set to raise an error if the method is invoked before it's implemented. 49 00:03:39,870 --> 00:03:41,580 Now we set the run method. 50 00:03:42,090 --> 00:03:46,710 If the drone is not running we need to return false. 51 00:03:46,710 --> 00:03:54,720 If the drone is running the status will be changed by adding 1 then the underscore run will be invoked 52 00:03:55,680 --> 00:03:58,870 and the update elapse method will be invoked. 53 00:03:58,870 --> 00:03:59,120 OK. 54 00:03:59,130 --> 00:04:05,010 This part seems a bit complicated so let's go through the code so I can explain what will happen once 55 00:04:05,010 --> 00:04:06,830 the smartphone is shaped. 56 00:04:06,930 --> 00:04:14,760 This run method will be invoked then the status will be changed to 1 and the underscore run method will 57 00:04:14,760 --> 00:04:17,360 be invoked in this underscore run. 58 00:04:17,430 --> 00:04:24,510 If all the commands will to be defined based on the status number every time there is a shake the drone 59 00:04:24,510 --> 00:04:32,250 will fly according to the status and with update elapsed we will receive how much time it took to complete 60 00:04:32,250 --> 00:04:33,750 the course. 61 00:04:33,750 --> 00:04:39,900 Once the course is finished the stop method will be invoked and all the values will go back to the initial 62 00:04:39,900 --> 00:04:40,920 settings. 63 00:04:40,920 --> 00:04:43,460 Now let's start by creating course a. 64 00:04:43,530 --> 00:04:46,200 So you will get a better understanding set. 65 00:04:46,200 --> 00:04:55,030 Class course a witch will inherit the base course defined the underscore run so it can overwrite. 66 00:04:55,050 --> 00:05:00,900 Now we will set the actions to the status number starting with Status 1. 67 00:05:01,080 --> 00:05:10,770 The drone will take off next let's set status 10 in the run method we set to add 1 to the status which 68 00:05:10,770 --> 00:05:12,990 means to get to the next action. 69 00:05:12,990 --> 00:05:15,900 We need to shake the smartphone 10 times. 70 00:05:15,900 --> 00:05:21,060 Once it hits 10 the drone will rotate clockwise 90 degrees. 71 00:05:21,120 --> 00:05:23,470 You can customize the actions on your program. 72 00:05:23,530 --> 00:05:27,550 Before this lesson we'll set it to clockwise. 73 00:05:27,690 --> 00:05:35,990 We can also add status 15 and 20 and 25 since the drone will be moving 90 degrees each time. 74 00:05:36,420 --> 00:05:41,820 By the time we reach 25 the drone will be facing where it started. 75 00:05:41,820 --> 00:05:43,950 Next we'll set the state is 30. 76 00:05:43,950 --> 00:05:47,880 To flip the drone front forward then at State is 40. 77 00:05:47,880 --> 00:05:51,760 We set the drone to flip back. 78 00:05:51,940 --> 00:05:58,900 Lastly at status is 50 we will set the drone to land and run the stop method so the status will go back 79 00:05:58,900 --> 00:06:00,990 to the initial settings. 80 00:06:01,010 --> 00:06:04,740 Imagine that this is of course a Mario Kart. 81 00:06:04,900 --> 00:06:06,320 Next let's set course. 82 00:06:06,330 --> 00:06:10,750 B Again this will inherit the base course class. 83 00:06:10,750 --> 00:06:17,050 I'll go on and create the Course B but you can customize the entire course if you wish to do so. 84 00:06:17,080 --> 00:06:25,870 First we define underscore run and override at state as one we will set the drone to take off at status 85 00:06:25,870 --> 00:06:26,430 10. 86 00:06:26,650 --> 00:06:31,630 We set the drone to flip front the flips are quite fun to watch. 87 00:06:31,630 --> 00:06:35,730 So you should definitely have it in the course at status 20. 88 00:06:35,740 --> 00:06:41,340 We set the drone to flip back here we will set another status. 89 00:06:41,350 --> 00:06:50,410 If self elapsed is not a nun and the elapsed time is bigger than 10 and smaller than 15 the status will 90 00:06:50,410 --> 00:06:51,910 skip to status 45 91 00:06:55,670 --> 00:07:02,800 next we sit status 30 which will flip the drone to the right as we added the if statement to state is 92 00:07:02,800 --> 00:07:03,500 20. 93 00:07:03,680 --> 00:07:10,820 Once all the condition is cleared the status will jump to 45 skipping status is in between. 94 00:07:10,820 --> 00:07:16,150 Let's copy status 30 to make status 40 and set this to flip left. 95 00:07:16,190 --> 00:07:22,070 You can think of this as a bonus stage in Mario Kart where you get a certain item that helps you warp 96 00:07:22,490 --> 00:07:26,360 to a better position. 97 00:07:26,360 --> 00:07:32,870 Lastly we set status 50 to land and not to forget to stop as we just seen. 98 00:07:32,930 --> 00:07:39,990 You can use elapsed to create a bonus stage or even set back statuses to make the course more interesting. 99 00:07:40,010 --> 00:07:47,430 It's all up to you so have fun creating the courses next suit we want to create a global function name. 100 00:07:47,430 --> 00:07:57,590 Get courses this function will create the course and return the value. 101 00:07:57,890 --> 00:08:05,900 The first course will be number one with course a as the course name followed by an argument drone. 102 00:08:05,930 --> 00:08:11,990 This will be the same for the next course we main course name will be course be followed by an argument 103 00:08:12,020 --> 00:08:14,420 set to drone as we said. 104 00:08:14,450 --> 00:08:16,190 Each course to Singleton. 105 00:08:16,190 --> 00:08:24,020 Even if the get course function is invoked multiple times the present course A or B will be returned 106 00:08:25,330 --> 00:08:26,300 in our next lesson. 107 00:08:26,300 --> 00:08:29,660 We will go to the server P Y file to invoke the horse.