WEBVTT 00:06.830 --> 00:08.020 Welcome back. 00:08.030 --> 00:13.790 Now that we have our character and our enemies, we need to be able to move them around. 00:13.880 --> 00:17.780 This means we need to be able to handle input specifically for Aura. 00:17.780 --> 00:20.360 We're going to deal with the Aura character first. 00:20.360 --> 00:25.730 And in order to move or around in the level, we need to handle input. 00:25.730 --> 00:30.530 And the way to do that is to set up enhanced input for our character. 00:30.530 --> 00:32.210 So we're going to do that. 00:32.210 --> 00:37.820 I have a lot of windows open here, so what I'm going to do is hover over each of the tabs and simply 00:37.820 --> 00:40.670 click the Middle Mouse button to close those. 00:40.670 --> 00:42.890 So closing all of these down. 00:46.540 --> 00:50.320 Now we've got that under control and we can set up enhanced input. 00:50.350 --> 00:53.770 Now for movement, we're going to need an input action. 00:53.770 --> 01:00.850 So in my content drawer in Blueprints, I'm going to create a new folder called Input. 01:01.600 --> 01:07.180 And here in input, I'm going to make yet another folder called Input Actions. 01:08.230 --> 01:13.010 And all of our input actions will go into this folder for this project. 01:13.030 --> 01:20.380 Now an input action is required for enhanced input in order to take input from some sort of device such 01:20.380 --> 01:21.400 as the keyboard. 01:21.400 --> 01:28.060 So for movement, we're going to make a new input action by right clicking, going to input and selecting 01:28.060 --> 01:29.140 input action. 01:29.140 --> 01:34.480 And the convention is to put in a for input action and we'll call this one move. 01:34.510 --> 01:40.690 Now I'm going to open up a move and the only thing I really want to change here is the value type, 01:40.690 --> 01:46.190 because for movement, I want to be able to handle two dimensional movement. 01:46.190 --> 01:51.500 Left and right is the first dimension forward and backward is the second dimension. 01:51.500 --> 01:58.460 So I'm going to change this value type to access 2D vector 2D that's going to allow me to take input 01:58.460 --> 02:03.080 in the form of a two dimensional vector with two axes X and y. 02:03.110 --> 02:08.170 I'd like to consider X to be left and right and Y to be forward and backward. 02:08.180 --> 02:09.830 Now, let's not get confused. 02:09.830 --> 02:16.730 Here in three dimensional space, we typically consider an actor's forward vector to be the x axis for 02:16.760 --> 02:17.750 that actor. 02:17.750 --> 02:22.070 But for movement, we're talking about a 2D axis space. 02:22.100 --> 02:25.220 Look at the Wasd keys on your keyboard. 02:25.220 --> 02:28.190 W and X will be forward and backward. 02:28.190 --> 02:32.450 We're going to consider that to be the Y axis in this 2D space. 02:32.480 --> 02:34.550 A and D will be left and right. 02:34.580 --> 02:39.140 We'll consider that the x axis in this 2D space. 02:39.140 --> 02:44.750 So now that we have an input action, the way that we link this to our character is going to be through 02:44.750 --> 02:52.490 an input mapping context and that's where we can associate keyboard keys with our input action to move. 02:52.520 --> 02:56.990 So back in our input folder, I'm going to go back up one level. 02:56.990 --> 03:00.290 We'll put our input mapping context right here. 03:00.290 --> 03:06.920 So I'm going to right click, go to input and select input mapping context, and I'll call this emcee 03:06.950 --> 03:10.850 for input mapping, context or context. 03:10.940 --> 03:13.340 And I'll go ahead and open this up. 03:13.340 --> 03:19.280 And here we have our mappings, an empty array currently, but if I click plus I can add one and open 03:19.280 --> 03:22.280 the dropdown and select an input action. 03:22.280 --> 03:27.560 Opening this up, I see that the only one available is the one I just made I a move. 03:27.560 --> 03:35.450 I'll select that Now that we have a move in this input mapping context, we need to associate it with 03:35.450 --> 03:37.310 various forms of input. 03:37.340 --> 03:44.780 Now, for the time being, I'm just going to set up Wasd movement at this stage in the course. 03:44.780 --> 03:50.570 So what I'll do is I'll click on the keyboard icon here and then press D. 03:50.930 --> 03:52.400 We'll start with the D key. 03:52.400 --> 03:55.370 The key is perhaps the most simple. 03:55.370 --> 03:58.700 When we press D, we want to move to the right. 03:58.730 --> 04:05.960 Now I'd like to add additional keys to this, so I'm going to press the plus icon next to move and get 04:05.960 --> 04:07.610 another mapping. 04:07.610 --> 04:13.340 I'm going to click the keyboard icon and press A now pressing D moves us to the right. 04:13.340 --> 04:20.570 Pressing A is going to move us to the left, which means further down the line in our code, when we 04:20.600 --> 04:27.200 set up the ability to respond to user input, we're going to access data that we retrieve as a result 04:27.200 --> 04:33.260 of these mappings and pressing D and A will both result in us retrieving data. 04:33.260 --> 04:37.070 But when I press A, I'd like that data to be negative. 04:37.070 --> 04:43.850 I want to receive a positive one when I'm pressing D and negative one when I'm pressing A and in order 04:43.850 --> 04:48.080 to do that I have to modify that input using a modifier. 04:48.080 --> 04:54.710 So under a I'm going to click plus for the modifiers and for this modifier, I'll open the dropdown 04:54.710 --> 04:56.090 and choose negate. 04:56.120 --> 05:03.470 If I open that index, I see that it's going to negate all three axes, but D and A are just going to 05:03.470 --> 05:05.240 be on the x axis. 05:05.240 --> 05:10.580 And remember, a move is a two dimensional input action with two axes. 05:10.580 --> 05:15.290 So the Z axis here has no meaning for us in any of our modifiers. 05:15.290 --> 05:20.600 For I a move but D and A those are going into the x axis. 05:20.600 --> 05:23.720 Remember I said A and D is left and right. 05:23.870 --> 05:29.930 We're considering that the x axis in this two dimensional space for I a move. 05:29.930 --> 05:32.570 So we're going to negate that x axis. 05:32.600 --> 05:37.520 We don't need Y or Z checked, we just want to negate the x axis here. 05:37.670 --> 05:41.990 So that takes care of D and A, but we want to move forward and backward as well. 05:41.990 --> 05:46.070 So I'm going to click Plus to add another key, click the keyboard. 05:46.090 --> 05:50.380 Icon and press W and this will be for moving forward. 05:50.590 --> 05:52.630 Now, we don't want to negate it. 05:52.660 --> 05:56.440 When I press w, I want to receive a positive one value. 05:56.470 --> 06:00.220 However, I don't want to receive it on the x axis. 06:00.250 --> 06:06.500 In the two dimensional space for I a move I want to receive a positive one in the y axis. 06:06.520 --> 06:15.520 For that reason I have to add a modifier that will force the W key to provide input data in the y axis 06:15.520 --> 06:16.660 for I move. 06:16.690 --> 06:19.980 So I'm going to add a new modifier from the dropdown. 06:19.990 --> 06:22.960 I'm going to choose swizzle input axis values. 06:22.960 --> 06:29.220 That's how we swizzle or change the axis that this key will feed data into. 06:29.230 --> 06:32.230 And if I open the dropdown, we see the order. 06:32.260 --> 06:39.640 The order is set to y, x, z by default, input goes into the x axis first, but if we swizzle it, 06:39.640 --> 06:42.280 it now goes into the y axis first. 06:42.280 --> 06:46.370 So now W will feed data into the y axis. 06:46.370 --> 06:48.440 So that takes care of moving forward. 06:48.440 --> 06:50.120 But I want to move backward as well. 06:50.120 --> 06:53.420 So I'm going to add yet another binding. 06:53.600 --> 06:57.230 And for this one I'll click the keyboard and press s. 06:57.260 --> 06:59.200 This will be for moving backward. 06:59.210 --> 07:02.510 Now this one is going to need a couple of modifiers, right? 07:02.510 --> 07:09.110 For one, we know we'll need to swizzle it like we did with W into the Y axis, but we also want to 07:09.110 --> 07:14.750 negate this input value so we get a negative value and we'll know that we can move backward in that 07:14.750 --> 07:15.440 case. 07:15.560 --> 07:17.150 So we'll add two modifiers. 07:17.150 --> 07:23.300 The first one is going to be the negate, and then we'll add a second modifier that will be swizzle 07:23.300 --> 07:24.800 input axis values. 07:24.800 --> 07:32.120 And as we can see, it's going to go into the Y axis as that's the first letter in the order. 07:32.120 --> 07:39.950 So now that we have an input mapping context and we have Wasd keys set to feed the correct data into 07:39.950 --> 07:47.090 the 2D axis values for a move, we need to actually use that data to move the character. 07:47.090 --> 07:53.030 Now we could do this in the character class if we like, but in this project we're going to handle controlling 07:53.030 --> 07:55.760 the character in the player controller class. 07:55.760 --> 08:01.910 We don't want to crowd up the character class with too many responsibilities and the player controller 08:01.910 --> 08:09.440 class is a perfectly valid class to handle movement for the character that that controller is possessing. 08:09.530 --> 08:16.970 So our next step is to create an aura player controller class, and that's going to be your quest. 08:16.970 --> 08:23.000 Create a new class based on player controller and call it aura player controller. 08:23.000 --> 08:29.330 If you're following along with the same naming conventions now, make sure that this goes into its own 08:29.330 --> 08:34.100 player folder, just like our characters went into our own character folder. 08:34.160 --> 08:37.280 Pause the video and conquer this quest now. 08:40.270 --> 08:43.090 Okay, so I need a new C plus plus class. 08:43.090 --> 08:49.000 I'm going to go into C plus plus classes and aura and public and we'll right click right here to make 08:49.000 --> 08:50.410 a new C plus plus class. 08:50.410 --> 08:52.900 And this will be a player controller. 08:53.140 --> 08:56.560 So here's the player controller class clicking next. 08:56.560 --> 09:01.150 And instead of just going straight into the public folder, I want to be organized. 09:01.150 --> 09:07.480 So I'm going to type slash player and we'll put the player controller in the player folder and I'm going 09:07.480 --> 09:10.390 to call this class Aura player controller. 09:10.390 --> 09:16.780 So let's go ahead and create that class and I'm going to click No so I can compile this myself and I'll 09:16.780 --> 09:23.170 go ahead and close out of the editor and there's my player folder here in Writer, and we now have Aura 09:23.170 --> 09:25.840 Player controller, Dot H and CPP. 09:26.230 --> 09:34.120 So we're ready to associate our enhanced input action and input mapping context with our character. 09:34.120 --> 09:40.040 We're going to do so in Aura Player Controller and we're going to do that in the next video. 09:40.040 --> 09:42.920 So great job this video and I'll see you soon.