WEBVTT 00:00.870 --> 00:07.790 Even using SEO and for all our output needs up until this point. 00:08.340 --> 00:13.200 However see out isn't really well-suited to games. 00:13.230 --> 00:19.010 For example we couldn't draw you the very right most of the screen very easily. 00:19.080 --> 00:23.980 You have to draw a lot of whitespace first and then draw what you wanted. 00:24.570 --> 00:29.910 So instead of using See outs and want to use a different way of drawing that's more flexible and more 00:29.910 --> 00:32.680 well-suited to games. 00:33.420 --> 00:38.510 We just installed the curses library last time and that's what we're going to be using. 00:38.850 --> 00:49.820 So curses allows us more flexibility on how we draw out our output and also how we get input as well. 00:50.040 --> 00:54.960 It keeps with the ASCII character aesthetic that we're used to. 01:00.160 --> 01:10.820 But allows us to draw the tax at any point the SCREATON you can think of it as having the screen be 01:10.820 --> 01:17.410 a two dimensional array and we can place characters at any location. 01:17.750 --> 01:22.920 In addition Pearse's allows more flexibility with her input. 01:22.950 --> 01:29.450 You noticed that scene will block the program from running the next instruction until the user input 01:29.450 --> 01:31.830 something and presses enter. 01:31.850 --> 01:41.390 This is limits the gains we can make to only turn based games like we've been doing but with curses 01:41.390 --> 01:46.150 we can make it so we don't lock put in. 01:46.460 --> 01:50.560 Instead we can pool periodically free. 01:50.760 --> 01:54.120 Now be able to make interactive games. 01:54.150 --> 01:59.580 So let me show you just a simple hello world example using curses. 01:59.790 --> 02:08.190 So we've already set up our project so if you haven't done that yet watch the last lecture. 02:08.330 --> 02:15.180 And also for myself set up the run configurations for Mac again for Windows users. 02:15.180 --> 02:18.180 You often do the external tools method that I showed 02:20.690 --> 02:25.140 so her saying we need to do is teach cursive. 02:25.160 --> 02:39.570 So you are using init our screen and that's the very first thing this initializes the terminal in curses 02:39.570 --> 02:45.090 mode to do anything uncurse is really cool this first. 02:45.120 --> 02:49.200 Now we can kind of really start using it. 02:49.240 --> 02:56.420 Next thing I want to do is say print W and say hello 02:59.170 --> 03:00.240 or old 03:03.110 --> 03:09.790 so so so this will actually print to the curses window. 03:10.730 --> 03:17.850 And the next thing you do is Refresh Refresh method. 03:20.300 --> 03:27.380 When we print using the print w the data is actually written to like a hidden window which hasn't been 03:27.530 --> 03:28.750 played yet. 03:28.790 --> 03:35.360 So in order to show what we printed we must call the refreshment. 03:35.580 --> 03:36.870 OK. 03:37.110 --> 03:42.280 Just remember if you know if you don't see something show up that you printed. 03:42.280 --> 03:51.500 You have to call refresh a in wanted to call this next function. 03:52.030 --> 03:54.980 Character get c h. 03:55.480 --> 04:01.410 And this really just will for us get one character from the user. 04:01.510 --> 04:07.240 OK this is really just to help us pause so doesn't kind of quit right away. 04:08.260 --> 04:13.620 We'll be using and explaining and get character a bit later too. 04:13.840 --> 04:19.630 So the last thing I need to do is call and win. 04:20.090 --> 04:30.890 And so this cleans up everything that in its green did for hey we must always call and win last. 04:30.910 --> 04:38.920 Every time we use curses it will restore our terminal console to its original state. 04:38.920 --> 04:43.510 Otherwise we may see some weird problems with our terminal. 04:43.570 --> 04:49.070 So let's run this means we yet. 04:49.450 --> 04:50.110 There you go. 04:50.170 --> 04:51.090 Hello world. 04:51.190 --> 04:59.980 And cursor see no text that we drew so far it's nothing exciting. 04:59.980 --> 05:07.360 We could have done this out before but in the next lecture I want to really start diving deep and show 05:07.360 --> 05:12.380 you why we're using curses instead of standard input and output.