WEBVTT 00:00.050 --> 00:00.620 Hello guys. 00:00.620 --> 00:01.700 Welcome to the video. 00:01.700 --> 00:05.360 So we are almost done with the development of the character. 00:05.360 --> 00:06.890 We just have a couple of more steps. 00:06.890 --> 00:08.540 Like we need to make a knockback. 00:08.540 --> 00:11.360 We need to make a buffer jump and coyote jump. 00:11.360 --> 00:17.450 I want to set up most important functionality in one section so player is ready to go and we are ready 00:17.450 --> 00:21.200 to develop enemies, traps, levels, all of the other stuff that we need. 00:21.200 --> 00:23.330 And we don't have to come back to player as much. 00:23.330 --> 00:26.930 But no worries, there is just a couple of more videos to go and we're good. 00:26.930 --> 00:32.270 So in this one we're going to make a knockback so player can be knocked by the trap or by the enemy. 00:32.270 --> 00:36.980 First I want to remove this platform so we have a bit more space for the knockback. 00:36.980 --> 00:39.350 I'm going to place player over here. 00:39.740 --> 00:42.530 And let's first set up the animation. 00:42.530 --> 00:47.120 We're going to go to Animator Create new clip. 00:48.100 --> 00:49.300 Animations. 00:50.260 --> 00:51.430 Player knocked. 00:51.460 --> 00:53.050 This is how it's going to be. 00:53.320 --> 00:57.160 Then we need to go to graphics main character, virtual guy. 00:57.220 --> 01:02.710 There is this hit and we're going to take these sprites and place them over here. 01:02.710 --> 01:05.200 And let's make sample rate 12. 01:06.330 --> 01:07.560 Now let's see them. 01:08.590 --> 01:09.640 Yeah, this is good. 01:09.640 --> 01:11.170 And I want to make it a bit slower. 01:11.170 --> 01:13.990 So player is slowed down when he's knocked. 01:13.990 --> 01:15.370 At least it looks like that. 01:17.330 --> 01:19.700 That's why we have sample rate 12. 01:19.730 --> 01:23.720 Now let's go to animator and set up new animation. 01:24.290 --> 01:27.830 And most of the time we switched between animations with a boolean. 01:27.860 --> 01:30.980 This time I want to show you how to use trigger. 01:30.980 --> 01:35.270 We're going to make a trigger parameter and let's name it as knockback. 01:36.160 --> 01:38.980 Now let's drag this player knocked over here. 01:38.980 --> 01:45.250 And I want to make a transition to knocked from any state just like that. 01:46.150 --> 01:50.650 Any state means we're going to transfer to this animation from any state we have over here. 01:50.650 --> 01:51.280 Doesn't matter. 01:51.280 --> 01:54.190 We are in the idle jump, full wall slide. 01:54.190 --> 01:55.720 It will be interrupted. 01:55.720 --> 02:00.370 And we're going to jump to the knockback straight ahead, which is really good because player can get 02:00.370 --> 02:01.900 knocked while he's running. 02:01.900 --> 02:04.390 While he's wall jumping, he may be hit by a trap. 02:04.390 --> 02:06.190 So so that is what we need to do here. 02:06.190 --> 02:12.790 We need to make him vulnerable at any moment of his animation over here on a condition we're just going 02:12.790 --> 02:14.140 to add condition. 02:14.780 --> 02:16.190 Knock back and that's it. 02:16.220 --> 02:17.810 Now let's open settings. 02:17.810 --> 02:21.080 And over here we're going to make transition duration zero. 02:21.080 --> 02:22.880 And it is very important. 02:22.880 --> 02:25.550 Make sure you uncheck this over here. 02:25.550 --> 02:32.450 It's supposed to be unchecked because otherwise player will be able to transfer to a knock back animation 02:32.450 --> 02:34.250 again and again from himself. 02:34.250 --> 02:37.460 So it's going to be sorry it's going to be in the cycle just like that. 02:37.580 --> 02:41.780 So in this animation we're going to make transition to idle move. 02:42.050 --> 02:47.120 And here we don't need any condition because we're going to transfer to idle move anyway. 02:47.120 --> 02:48.320 So we don't need a condition. 02:48.320 --> 02:51.380 But this time we need an exit time. 02:52.290 --> 02:56.190 Because we want to be sure this animation is played only once. 02:56.250 --> 03:00.600 Transition duration can be zero, but exit time over here should be one. 03:00.600 --> 03:01.320 Okay. 03:01.530 --> 03:02.430 Yes. 03:02.670 --> 03:06.450 Now let's go to the player script. 03:07.630 --> 03:09.070 And set up knockback. 03:09.070 --> 03:11.830 It's going to work almost the same as a wall jump. 03:11.830 --> 03:13.600 Actually, it's going to be super similar. 03:13.600 --> 03:15.100 We're going to need a header. 03:15.100 --> 03:17.290 I'm going to name it as knockback. 03:17.290 --> 03:23.620 And this header are going to have serialized field, private float, knockback duration because we want 03:23.620 --> 03:25.840 to know for how long player is knocked. 03:26.290 --> 03:27.910 Now let's make it one by default. 03:27.910 --> 03:30.430 Also we want to know the direction of a knockback. 03:30.430 --> 03:36.040 So I'm going to do private Vector2 knockback power. 03:36.460 --> 03:39.820 And then we need private Boolean is knocked. 03:40.370 --> 03:45.890 And also we want to know if player can be knocked at the moment, because if he's in the knock back 03:45.890 --> 03:48.470 already, we don't want to start knock back again. 03:48.470 --> 03:52.490 So let's do Privatebool can be knocked. 03:53.280 --> 03:54.000 Okay. 03:54.000 --> 03:54.840 Very good. 03:54.840 --> 03:55.860 We have the script. 03:55.860 --> 03:56.310 Now. 03:56.310 --> 03:59.070 Let's go and make a public method. 04:00.040 --> 04:01.120 Public void. 04:01.120 --> 04:02.080 Knockback. 04:03.000 --> 04:10.410 In this method, first we want to say is knocked true and we want to trigger the animation. 04:10.440 --> 04:13.350 Let's go and type anim set trigger. 04:14.520 --> 04:15.390 Knock back. 04:17.430 --> 04:22.560 Make sure this name is same to the name in the parameters over here. 04:24.300 --> 04:27.210 So this should be the same as this one. 04:27.600 --> 04:28.140 Okay. 04:29.270 --> 04:30.920 Actually, mine is not the same. 04:31.340 --> 04:32.300 Knock. 04:33.640 --> 04:34.150 Back. 04:36.370 --> 04:37.120 Okay. 04:37.270 --> 04:39.490 You see how important it is to be sure? 04:39.820 --> 04:40.870 Uh, yeah. 04:41.080 --> 04:44.020 Now, how do we call this method in the future? 04:44.020 --> 04:47.860 We're going to call this method from the enemy or from the trap we have. 04:47.860 --> 04:50.620 That script will trigger this method. 04:50.620 --> 04:54.730 That's why we made it public, because this one should be available to other scripts. 04:54.730 --> 04:56.530 As of now, we don't have any traps. 04:56.530 --> 04:57.640 We don't have any enemies. 04:57.640 --> 05:01.120 And I don't want to distract you from what is important right now. 05:01.120 --> 05:04.540 So we're just going to call this method with a button on a keyboard. 05:04.540 --> 05:09.100 But later on, I'm going to show you how to trigger this method from outside of a script. 05:09.100 --> 05:09.700 Okay. 05:10.090 --> 05:12.010 As of now, let's just do this. 05:12.010 --> 05:14.590 If input get key down. 05:14.590 --> 05:14.860 Key. 05:14.860 --> 05:16.000 Code key. 05:16.820 --> 05:18.620 Then we're going to call knockback. 05:20.120 --> 05:21.080 Simple as that. 05:21.080 --> 05:25.700 Um, let's just go ahead and try to trigger the animation and see if it works. 05:30.410 --> 05:35.360 I'm going to run around, then I'm going to press K and I'm knocked. 05:35.360 --> 05:36.590 Nice. 05:36.590 --> 05:38.330 This is working very well. 05:38.330 --> 05:39.680 Let's go back to script. 05:41.330 --> 05:47.210 And we want to enable knockback, and then we want to disable knockback after the knockback duration. 05:47.210 --> 05:48.980 And for that we need what? 05:48.980 --> 05:49.730 Think about it. 05:49.730 --> 05:51.050 We did it in the last video. 05:51.050 --> 05:53.030 Yes we need a coroutine. 05:53.030 --> 05:55.910 So we're going to go ahead to the coroutine we have. 05:56.900 --> 05:58.490 And let's make another one. 05:58.790 --> 06:00.980 Private eye enumerator. 06:02.440 --> 06:05.260 Knock knock back routine. 06:05.260 --> 06:06.430 Let's call it that. 06:06.670 --> 06:10.810 Over here we're going to do can be knocked equals to false. 06:10.810 --> 06:13.120 So player cannot be knocked again. 06:13.120 --> 06:15.670 Then let's say is knocked equals true. 06:15.670 --> 06:17.170 So we know he's knocked. 06:17.170 --> 06:23.770 Then we're going to do yield return new waitforseconds of knockback duration. 06:24.250 --> 06:28.660 Then we're going to say can be knocked again true and is knocked. 06:29.380 --> 06:29.980 Pulse. 06:30.430 --> 06:31.090 All right. 06:31.090 --> 06:32.800 So this is going to be good. 06:32.830 --> 06:36.820 Uh, let's go back to the knockback method. 06:36.820 --> 06:42.490 And instead of this we're going to say we're going to type Startcoroutine knockback routine. 06:43.590 --> 06:44.490 Simple as that. 06:44.490 --> 06:51.600 Also, while we are knocked, we don't want to do anything with a character player not supposed to be 06:51.600 --> 06:52.770 able to control it. 06:52.770 --> 06:57.210 He is not supposed to be able to move around, jump, or do anything else. 06:58.630 --> 07:02.080 We can do that simply by going here and type. 07:02.080 --> 07:04.630 If is knocked, then return. 07:04.630 --> 07:08.770 So now none of this will work while we are knocked. 07:08.770 --> 07:14.800 Basically, we're going to stop anything here for the duration of a knockback and let's go there and 07:14.800 --> 07:15.610 try this. 07:17.370 --> 07:19.050 We have knockback duration one. 07:19.050 --> 07:20.100 Knockback power. 07:20.100 --> 07:21.450 Let's make it. 07:21.450 --> 07:23.970 Oh, we don't use it yet okay, let's keep it at zero. 07:23.970 --> 07:27.060 Let's just see if I can jump after the knockback. 07:27.060 --> 07:31.950 So I'm going to do knockback and I cannot jump but I can jump after the knockback. 07:34.150 --> 07:35.320 This is good, right? 07:38.960 --> 07:39.980 Yes. 07:39.980 --> 07:41.150 Very good. 07:41.180 --> 07:44.690 Now let's go and apply velocity of the knockback. 07:46.520 --> 07:48.650 So over here. 07:49.350 --> 07:53.250 We can do RB velocity equals to new vector two. 07:53.250 --> 07:54.960 Knock back power. 07:55.610 --> 07:58.430 Dot x multiplied by. 07:58.430 --> 08:06.170 Let's use the opposite facing direction for now and knock back power dot y going to be the same without 08:06.170 --> 08:06.680 changes. 08:06.680 --> 08:12.110 And also we want to be sure we cannot be knocked while we are in the knock back. 08:12.110 --> 08:14.030 So over here we want to type. 08:14.300 --> 08:20.660 If is knocked then return, which means we cannot knock back ourself again while we are in the knock 08:20.660 --> 08:20.990 back. 08:20.990 --> 08:21.860 So we check that. 08:21.860 --> 08:23.570 Then we start a coroutine. 08:24.940 --> 08:27.010 Which does the thing that we need. 08:27.010 --> 08:28.750 We cannot be knocked again and we are knocked. 08:28.750 --> 08:33.430 And we know that after knockback duration, we cancel the knockback and we say that we can be knocked 08:33.430 --> 08:34.240 again. 08:34.240 --> 08:38.350 And then over here we trigger the animation and we also give it a velocity. 08:38.350 --> 08:40.150 So he flies for a little bit. 08:40.150 --> 08:41.740 Let's go and try that. 08:47.210 --> 08:47.990 And. 08:49.730 --> 08:51.950 He didn't fly because I have zero here. 08:51.950 --> 08:54.620 Let's make it five and seven. 08:55.250 --> 08:56.150 And again. 08:56.150 --> 08:56.900 Boom. 08:57.110 --> 08:58.160 Nice, right? 08:58.190 --> 08:59.330 We were knocked. 08:59.570 --> 09:01.070 Yeah, that is cute. 09:01.070 --> 09:03.710 Although I see animation is not working very well. 09:03.710 --> 09:06.350 So maybe we're going to adjust and do it differently. 09:07.990 --> 09:08.500 Yeah. 09:08.500 --> 09:10.570 As of now, the problem is very simple. 09:10.570 --> 09:15.190 We have knockback duration one and animation is shorter than one second. 09:15.190 --> 09:19.900 Because of that and because we exited animation after one cycle over here. 09:21.470 --> 09:23.270 We can see that I'm doing knockback. 09:23.480 --> 09:29.900 I'm exiting animation, and only after that, um, I'm going back to the regular state, but still we're 09:29.900 --> 09:31.040 doing a bit of a slide. 09:31.040 --> 09:33.680 So one solution would be just to do. 09:34.830 --> 09:38.430 Knockback duration point, maybe 65. 09:41.390 --> 09:42.650 And now. 09:42.890 --> 09:44.870 Sorry, I forgot the power. 09:45.200 --> 09:46.280 Five and seven. 09:51.720 --> 09:54.150 So knockback and it's good. 09:54.150 --> 09:55.860 So yeah, we can do that. 10:01.180 --> 10:06.550 Or if you want to have a longer knockback, then you would have to do a bit of a change. 10:06.580 --> 10:12.430 You could say that we transfer here if knockback is true and can be knocked through. 10:13.810 --> 10:19.480 You could transfer here with a boolean, then you would remove exit time over here. 10:19.480 --> 10:23.380 Just remove exit time and make transfer from a player knocked to idle. 10:23.380 --> 10:25.780 Move with a condition is knocked false. 10:25.780 --> 10:26.590 Something like that. 10:26.590 --> 10:28.570 And it's supposed to work for me. 10:28.570 --> 10:33.880 I think I'll keep just knock back duration around seven and if we need to change it in the future, 10:33.880 --> 10:34.630 we're going to change it. 10:34.630 --> 10:37.570 But as of now it works very well, so why not use it like that? 10:37.570 --> 10:41.740 We also need to know, you know, we cannot spend too much time on the balance right now because we 10:41.740 --> 10:43.750 are not sure how the game is going to feel. 10:43.750 --> 10:49.300 Maybe knockback duration of a 0.7 is even longer than we should have, and we can make it a bit, you 10:49.300 --> 10:50.650 know, softer for the player. 10:50.650 --> 10:53.110 It all depends on the difficulty of the game you want to have. 10:53.110 --> 10:54.610 So let's keep it at that. 10:54.610 --> 10:56.620 Actually, let's do it as I do. 10:56.620 --> 11:00.490 Then once we have levels and enemies, we can always rebalance. 11:01.800 --> 11:02.610 Yes. 11:02.610 --> 11:08.040 Now this method is ready for the future, and I'm going to show you how to call it from outside of a 11:08.040 --> 11:09.420 player script later on. 11:09.420 --> 11:14.520 We're also going to improve it, and knockback will actually depend on the object that is damaging the 11:14.520 --> 11:17.070 player, the knockback direction, but that's going to be later. 11:17.070 --> 11:18.930 As of now, let's just keep it at that. 11:18.930 --> 11:21.480 I'm going to remove this if statement over here. 11:22.300 --> 11:23.140 And. 11:23.750 --> 11:24.770 I'm sorry. 11:27.850 --> 11:31.570 Yeah, and we are ready to go to the next video.