WEBVTT 00:00.000 --> 00:00.600 Hello guys. 00:00.600 --> 00:01.680 Welcome to the video. 00:01.680 --> 00:05.460 In this one I want to show you how to set up jump for the character. 00:05.460 --> 00:06.930 And we're not going to just set up jump. 00:06.930 --> 00:09.570 We also going to set up collision detection. 00:09.570 --> 00:14.460 So player knows when he's on the ground and when he can jump and when he cannot jump. 00:14.460 --> 00:17.190 Okay, the jump functionality itself is very simple. 00:17.190 --> 00:20.100 It's going to be done with the help of input from a keyboard. 00:20.100 --> 00:25.680 And this is probably a good chance to discuss different, uh, type of inputs. 00:26.370 --> 00:30.030 Uh, let's type here if input get key. 00:30.600 --> 00:33.330 Key code space. 00:34.270 --> 00:35.530 Debug log. 00:36.270 --> 00:38.820 Um, holding space. 00:39.850 --> 00:43.780 Then here we're going to type if input get key down. 00:44.380 --> 00:45.580 Uh yeah. 00:45.580 --> 00:46.270 Down. 00:46.270 --> 00:50.200 Key code space we're going to type Debug.log. 00:50.350 --> 00:55.510 I pressed space and then if input. 00:56.210 --> 00:56.930 Get. 00:58.140 --> 00:59.040 If input. 00:59.040 --> 01:00.960 Get key up. 01:01.770 --> 01:02.760 Key code. 01:04.280 --> 01:05.180 Space. 01:06.070 --> 01:07.000 We're going to type. 01:07.000 --> 01:07.780 I'm sorry. 01:09.350 --> 01:10.490 Debug log. 01:11.380 --> 01:13.570 I released space. 01:13.570 --> 01:17.770 So these three ways of doing input have a simple difference. 01:17.770 --> 01:19.780 Get key is called value. 01:19.780 --> 01:24.820 Holding the key get key down is when you press the key. 01:24.820 --> 01:29.080 And then there is a get key up which is called when you release the button. 01:29.080 --> 01:30.790 Let's go ahead and try this. 01:30.790 --> 01:34.000 Just so you know different ways and how it can affect the input. 01:34.000 --> 01:35.500 But we're going to use only one of them. 01:37.080 --> 01:39.300 So in the console I'm going to. 01:40.640 --> 01:42.680 Press the key and I'm going to hold it. 01:42.680 --> 01:44.810 And we can see we have I'm holding space. 01:44.810 --> 01:50.030 I pressed space when I'm releasing the button, I released space. 01:50.030 --> 01:51.020 This is what it does. 01:51.020 --> 01:52.670 Simply simple as that. 01:53.060 --> 01:53.600 Yeah. 01:53.600 --> 02:01.100 Um, now that we know that, let's just use one of them and we're going to use get key down space and 02:01.100 --> 02:04.310 as a functionality in result, we're going to make a jump. 02:05.070 --> 02:06.810 Jump is very simple to do. 02:06.810 --> 02:10.770 First of all, we need to know the jump force how high character can jump. 02:12.230 --> 02:14.210 So I think it can be done here. 02:14.210 --> 02:17.960 Let's do serialized field, private float, jump force. 02:17.960 --> 02:20.750 And I think it would be a good idea to make a header. 02:20.750 --> 02:23.540 So it's a bit more recognizable in the inspector. 02:23.540 --> 02:25.430 Let's type here header. 02:25.670 --> 02:31.130 And in quotation marks we can type uh movement or something like that. 02:31.370 --> 02:34.550 Now if we save this and go to unity. 02:35.720 --> 02:36.470 We're going to see. 02:36.470 --> 02:37.430 We've got. 02:38.440 --> 02:40.420 A new variable and a header. 02:41.270 --> 02:42.260 Movement. 02:42.290 --> 02:42.740 Move! 02:42.740 --> 02:43.130 Speed! 02:43.130 --> 02:43.430 Jump! 02:43.430 --> 02:44.090 Force! 02:44.120 --> 02:45.110 Nice. 02:45.110 --> 02:47.180 Now let's go and apply this jump force. 02:47.180 --> 02:52.250 In the update we can type RB velocity equals to new vector two. 02:52.250 --> 02:54.110 And we don't want to change the x. 02:54.110 --> 02:56.360 So it's going to be rb velocity dot x. 02:56.930 --> 03:00.230 And for the y it's going to be jump force. 03:00.740 --> 03:01.820 Let's go back. 03:06.420 --> 03:09.930 And we're gonna give it a jump force of maybe six. 03:09.930 --> 03:12.630 For now, we just want to test and make sure it's working. 03:13.340 --> 03:16.490 And when I'm pressing space key, I'm jumping. 03:16.520 --> 03:17.570 Yay! 03:17.960 --> 03:19.100 Nice. 03:19.130 --> 03:21.140 Now there is an issue. 03:21.140 --> 03:24.050 If I jump a lot, I'm going to fly. 03:26.240 --> 03:27.860 This is not what we need, right? 03:27.860 --> 03:31.040 We want to jump only once when we are on the ground. 03:31.340 --> 03:35.570 For that, we need to be sure we know when player is grounded. 03:35.750 --> 03:36.800 How do we do that? 03:36.830 --> 03:42.380 Well, first of all we need to define what is a ground in the game world. 03:42.770 --> 03:47.000 For that we can go to layers over here and click Add Layer. 03:47.330 --> 03:49.700 We have an empty field over here. 03:49.700 --> 03:52.040 So I'm going to type here ground. 03:52.340 --> 03:53.450 Very nice. 03:53.510 --> 03:59.090 Now let's select the platform itself and change layer to ground. 03:59.120 --> 04:05.810 Now that we know that this object is a ground and now we just need to detect it and be sure that player 04:05.810 --> 04:08.840 is standing on the ground when we're trying to jump. 04:08.840 --> 04:10.130 How are we going to do this? 04:10.160 --> 04:13.610 Well there is such thing as a raycast. 04:13.910 --> 04:19.100 Raycast is basically a line that drawing from one point to another. 04:19.100 --> 04:25.760 And if this line is detecting anything, then we can say that, well, we detected a ground, for example, 04:25.760 --> 04:26.720 or something like that. 04:26.720 --> 04:33.590 So basically we just can use this raycast which is a simple line to detect if player is above ground. 04:33.920 --> 04:34.700 And. 04:36.870 --> 04:38.700 Let's go. 04:41.030 --> 04:43.490 Over here and make a header. 04:45.050 --> 04:45.800 Header. 04:46.560 --> 04:47.700 Collision. 04:48.930 --> 04:49.920 Uh, info. 04:50.160 --> 04:52.890 And then we're going to make private. 04:52.890 --> 04:56.190 Bool is rounded. 04:56.810 --> 04:57.770 Very good. 04:57.800 --> 05:02.630 Now we're gonna go to update, and in the update we need to type something. 05:02.630 --> 05:05.900 We need to type is grounded equals to. 05:05.900 --> 05:08.390 And here how you make a recast. 05:08.390 --> 05:10.850 It might be a bit confusing especially if you are new. 05:10.850 --> 05:11.840 Don't worry about it. 05:11.840 --> 05:14.630 Just type with me and learn how to use it. 05:14.630 --> 05:19.730 And if you don't understand it quite well right now, you will understand it later for sure. 05:19.730 --> 05:23.360 So let's type here physics 2D dot raycast. 05:23.360 --> 05:26.630 And this will say that we want to do a physics 2D raycast. 05:26.630 --> 05:32.210 And then in the parentheses you can see it says what do we need here to make it work. 05:32.360 --> 05:38.900 So we want to draw a raycast from original position of the character from the center. 05:38.900 --> 05:42.410 So I'm going to do origin transform position. 05:43.660 --> 05:51.070 Then we need direction, and we want to cast a ray from a center of the character down like that. 05:51.070 --> 05:52.330 This is what we want to do, right? 05:52.330 --> 05:54.490 We want to see what is below the character. 05:54.490 --> 06:00.280 If we want to cast it down, we can just simply type here vector two dot down. 06:00.280 --> 06:06.550 And if you see this for the first time, vector two dot down is equals to vector two zero minus one. 06:06.880 --> 06:07.930 Simple as that. 06:07.930 --> 06:11.680 Now if you put your mouse over here it says that that's good. 06:11.680 --> 06:13.180 That's probably everything that we need. 06:13.180 --> 06:17.710 But we can move further and apply more settings to this raycast. 06:17.710 --> 06:20.260 For example we can know the distance. 06:20.260 --> 06:22.120 How far should we do the check? 06:22.120 --> 06:27.730 For that we need to make a serialized field private float. 06:29.340 --> 06:30.930 Ground check. 06:30.960 --> 06:33.210 Distance over here. 06:33.210 --> 06:40.590 Please make sure that you put this line above the boolean, because header will not show itself if private 06:40.590 --> 06:42.540 value is after the header. 06:42.930 --> 06:47.190 Uh, something visible should be after the header for header to work. 06:47.220 --> 06:51.270 Okay, so just make sure you have ground check and then is grounded. 06:51.390 --> 06:56.640 So now that we have this value we can go here and type ground check distance. 06:57.540 --> 07:02.190 If we put a comma over here, we can see that we can use layer mask as well. 07:03.530 --> 07:04.130 Right. 07:04.130 --> 07:07.430 So for Layer Mask here we need to make one. 07:07.430 --> 07:11.690 So let's go back here again and make serialized field private. 07:11.690 --> 07:15.020 And this time we're going to use Layer Mask as a data type. 07:17.190 --> 07:18.300 Layer Mask. 07:19.110 --> 07:24.540 And then we're going to just name it as what is ground. 07:24.570 --> 07:25.860 Simple as that. 07:25.860 --> 07:29.640 And then over here we're going to type what is ground. 07:29.700 --> 07:32.790 So this is how you detect things around the objects. 07:32.790 --> 07:35.610 There are many ways to do detection around the character. 07:35.610 --> 07:37.470 But this one is the simplest for now. 07:37.470 --> 07:41.100 So let's just save it and it will work. 07:41.100 --> 07:42.720 But there is a problem. 07:42.720 --> 07:45.090 Raycast is working there. 07:45.090 --> 07:45.900 It is there. 07:45.900 --> 07:52.680 But we cannot see it because you know it's not visible to human eye, it's only visible to the Unity's 07:52.680 --> 07:52.890 eye. 07:52.920 --> 08:00.000 So if we want to see it, we just need to draw a line that has same parameters as the one that we just 08:00.000 --> 08:00.870 described. 08:01.260 --> 08:03.810 For that, we can use on draw gizmos. 08:04.850 --> 08:11.930 On drawer gizmos does not do a raycast check on drawer gizmos only draws a line itself. 08:11.930 --> 08:17.060 It only shows you something, but it is not the same as this one over here. 08:17.060 --> 08:24.230 It's just that we can draw it in a very similar way, so both of them will represent the same info. 08:24.230 --> 08:25.490 Anyway, let's just type here. 08:25.490 --> 08:33.980 Gizmos draw a line from Transform.position and as an endpoint we need another vector and we cannot just 08:33.980 --> 08:35.930 type it like it was before. 08:36.050 --> 08:38.150 Over here it would be a bit different. 08:38.150 --> 08:39.800 So we need to type here. 08:40.720 --> 08:46.090 Uh, new vector two for the X is going to be not changed at all. 08:46.090 --> 08:48.130 So we're going to type transform position dot. 08:49.020 --> 08:49.560 X. 08:49.560 --> 08:59.040 And for the y we're going to type transform position dot y minus ground check distance. 08:59.610 --> 09:00.570 Very well. 09:00.570 --> 09:01.980 Let's save this. 09:01.980 --> 09:03.900 And let's go back to the unity. 09:09.590 --> 09:16.310 So now if we increase this value over here, we can see a line is drawn and this whole raycast will 09:16.310 --> 09:17.420 work as well. 09:17.720 --> 09:22.310 So we just need to be sure that this line extends outside of a capsule collider. 09:22.310 --> 09:23.690 And that would be enough. 09:23.690 --> 09:28.610 So I think 0.8 is actually a good value here for me. 09:28.610 --> 09:32.120 You can try a different one if you need to, but 0.5 should be fine. 09:32.120 --> 09:35.630 And also we need to choose what is ground. 09:35.630 --> 09:37.730 And that would be ground layer. 09:37.760 --> 09:38.720 Very nice. 09:38.720 --> 09:40.760 Now if we go to play mode. 09:43.540 --> 09:46.060 And go to debug over here. 09:46.150 --> 09:46.720 Sorry. 09:46.720 --> 09:48.070 Let's go to debug. 09:49.200 --> 09:50.790 We can see that is grounded. 09:50.790 --> 09:51.420 True. 09:51.450 --> 09:54.270 If I jump, it will become false. 09:54.270 --> 09:56.130 True, false. 09:56.130 --> 09:57.900 Because we're not detecting ground anymore. 09:57.900 --> 09:59.520 Because we are in the air. 09:59.640 --> 10:00.840 How can we use it? 10:00.840 --> 10:02.550 I think you know how we can use it. 10:02.550 --> 10:04.140 It's a very simple thing. 10:06.840 --> 10:14.190 We go over here where we're trying to jump and we can type here and is grounded. 10:15.160 --> 10:21.520 So if we pressing the key down and if character is grounded, we perform the jump. 10:21.550 --> 10:25.300 Let's save this and let's go back to unity and try this out. 10:33.870 --> 10:34.980 Go to play mode. 10:37.000 --> 10:40.000 And now we jump in. 10:40.000 --> 10:42.760 But if we try to jump while we are in the air. 10:45.480 --> 10:46.560 Doesn't work. 10:46.680 --> 10:47.670 Isn't it cool? 10:47.730 --> 10:48.750 It's very cool, man. 10:48.750 --> 10:49.920 I love it so much. 10:50.520 --> 10:52.740 Now there are some things that could improve. 10:52.740 --> 10:53.910 Feeling of a jump. 10:54.180 --> 10:56.730 Um, that would be very easy to adjust. 10:56.730 --> 11:00.450 We can go to rigidbody and then we go to play mode. 11:01.270 --> 11:05.980 And over here you need to play with the gravity scale and jump force. 11:05.980 --> 11:08.770 Gravity scale makes character heavier. 11:08.770 --> 11:13.990 So if you type here four and try to jump again, look what is going to happen. 11:14.990 --> 11:16.730 He barely jumps, right? 11:16.730 --> 11:19.100 So now we want him to jump higher. 11:19.100 --> 11:25.130 And personally, me, I want to have a feeling where character feels quick and heavy, like he is just 11:25.130 --> 11:26.390 jumping really high. 11:26.390 --> 11:28.340 But it's not that easy to do. 11:28.340 --> 11:32.450 So on the jump force, I'll try to set value to 14. 11:32.450 --> 11:34.850 And actually I know the value because I tried before. 11:34.850 --> 11:38.780 So jump force 14 and Gravity Scale 4.5. 11:38.780 --> 11:41.540 And if we try to jump again, this is how it feels. 11:41.540 --> 11:45.500 And I'm really satisfied with the this feeling for you. 11:45.500 --> 11:51.650 I would suggest to use these values for now and wait for the later setup of the character, because 11:51.650 --> 11:57.080 we still need to set up jump animations, and also we need to make him flip when he goes to the left. 11:57.080 --> 12:03.200 And once we do that, it's going to be a bit easier to adjust and see what the jump force and gravity 12:03.200 --> 12:05.600 scale you should have and how it should work better. 12:05.600 --> 12:08.270 So as of now, let's just leave it as it is. 12:08.270 --> 12:10.160 Maybe let's just keep one and six. 12:10.160 --> 12:10.700 It's okay. 12:10.700 --> 12:14.180 Once we have entire setup, it will be a bit easier to balance. 12:14.180 --> 12:18.770 I think, because you're going to not only see how it feels, but but also you're going to see how it 12:18.770 --> 12:19.160 looks. 12:19.160 --> 12:21.200 And that is very important as well, right? 12:22.190 --> 12:22.670 Yeah. 12:22.670 --> 12:25.790 So probably let's just keep one on the gravity scale. 12:25.790 --> 12:27.950 Jump four six should be fine. 12:27.950 --> 12:32.480 Now, uh, before we end this video, I want to do some changes here. 12:32.480 --> 12:37.430 This feels a bit messy and it can get out of hand very quickly. 12:37.430 --> 12:38.960 So I want to clean this up. 12:38.960 --> 12:39.260 How? 12:39.260 --> 12:40.280 I want to clean this up. 12:40.280 --> 12:45.140 Well, maybe, just maybe, let's make a method. 12:45.140 --> 12:47.870 And this time I want to show you another way of making a method. 12:47.870 --> 12:52.430 You can type here handle collision as it would be a method. 12:52.430 --> 12:55.940 And now we can see it is underlined because there is no such method. 12:55.940 --> 13:02.450 But if you press alt Enter or Ctrl plus dot you will call uh Quick Actions menu. 13:02.450 --> 13:04.880 And here you can choose Generate method. 13:05.120 --> 13:06.050 Very nice. 13:06.050 --> 13:08.900 Now we need to know what will be inside of this method. 13:08.900 --> 13:12.050 And inside of this method I want to place this collision. 13:12.050 --> 13:14.600 So I'm just going to cut it out. 13:15.760 --> 13:17.920 And paste it in here. 13:18.700 --> 13:19.600 Very good. 13:19.600 --> 13:22.690 Now it is a bit cleaner and I like it more. 13:22.780 --> 13:24.400 There is something else I want to do. 13:24.400 --> 13:28.870 I think it would be a good idea to take all of this. 13:28.870 --> 13:37.330 Click alt, enter, extract method, handle input and here we're going to take care of the input. 13:37.840 --> 13:39.940 So now we have everything clean and nice. 13:39.940 --> 13:44.530 The only suggestion I would do here is to take handle collision and move it above. 13:44.530 --> 13:49.630 Because we want to have collision information updated first, then we want to have the input. 13:49.630 --> 13:53.470 Then we want to update the animations and then we want to apply movement. 13:53.620 --> 13:58.870 Actually, I think animations can be after movement because we change velocity and then we apply animation 13:58.870 --> 13:59.440 to that. 13:59.590 --> 14:01.270 So yeah this is how it should be. 14:01.270 --> 14:07.000 I think this is the execution order in the update collision input movement animations. 14:07.750 --> 14:14.740 Um, for better understanding of the code, we could also take this line of code and just wrap it into 14:14.740 --> 14:17.410 a method that would say just jump. 14:18.190 --> 14:20.380 So let's do extract method. 14:21.290 --> 14:21.920 Jump. 14:22.810 --> 14:25.300 It's a bit better and easier to read. 14:25.330 --> 14:28.300 Um, let me see if we have a couple of minutes now. 14:28.300 --> 14:30.250 I think that's good for now. 14:30.250 --> 14:31.390 That's good for this video. 14:31.390 --> 14:32.680 I'll see you in the next one. 14:32.680 --> 14:33.010 Okay.