WEBVTT 00:00.020 --> 00:00.470 Hello guys. 00:00.470 --> 00:01.490 Welcome to the video. 00:01.490 --> 00:06.410 In this one I want to show you how to make a trap with a spiked ball. 00:06.410 --> 00:09.770 Just want to make a trap that would swing in the air from left to right. 00:09.770 --> 00:14.660 And there are many ways to do that, but the way I want to use is more like a physically accurate. 00:14.660 --> 00:15.320 I would say. 00:15.320 --> 00:20.390 I want to push the trap once, and it's going to swing by itself the rest of the time. 00:20.390 --> 00:23.720 So how it's going to be let's go ahead to graphic traps. 00:23.720 --> 00:24.890 Spiked ball. 00:24.890 --> 00:29.540 Let's take these two set pixel per unit 16 and then hit apply. 00:29.990 --> 00:35.660 And I think we need some sort of a base for this trap where we can attach it. 00:35.660 --> 00:37.070 And let's go to. 00:38.580 --> 00:39.570 Terrain. 00:40.050 --> 00:42.210 And over here we have a bunch of things. 00:43.500 --> 00:47.670 I think we can use this sprite over here just to make it, um. 00:48.630 --> 00:50.280 Look like a base of a trap. 00:52.040 --> 00:53.360 So I'm going to drag. 00:54.580 --> 00:56.650 This fall. 00:57.650 --> 01:00.440 Square to the scene it's going to be. 01:02.990 --> 01:06.260 And maybe this one could be a bit smaller. 01:06.770 --> 01:07.880 Um, let me think. 01:07.880 --> 01:10.010 Yeah, let's make it as my 0.5. 01:10.010 --> 01:10.640 Maybe. 01:11.350 --> 01:13.240 Sorry we need like this. 01:13.240 --> 01:14.860 And then point five. 01:15.490 --> 01:15.670 Yeah. 01:15.670 --> 01:16.630 It looks good to me. 01:17.200 --> 01:21.790 Just so we can place it somewhere in the middle of the level as well. 01:21.790 --> 01:24.040 Now this is going to be the base for this trap. 01:24.040 --> 01:25.510 Let's say it's going to be here. 01:25.930 --> 01:30.400 Then we're just going to call it as, um, base. 01:31.430 --> 01:33.680 Then let's make a parent for this one. 01:33.680 --> 01:34.610 It's going to be trap. 01:35.610 --> 01:38.190 Spiked ball. 01:38.430 --> 01:41.100 Nice, then. 01:42.320 --> 01:45.560 This object over here should have a bunch of components. 01:45.980 --> 01:48.800 One of them would be distance. 01:49.220 --> 01:52.730 Join 2D and rigidbody for this one should be static. 01:52.730 --> 01:57.740 So this rigidbody will not move and it will serve as a base for the swing trap. 01:57.740 --> 01:59.720 Now let's go to graphics again. 01:59.720 --> 02:01.520 Trap spike ball. 02:01.520 --> 02:03.020 Let's take this ball. 02:03.020 --> 02:04.760 Drag it into the scene. 02:05.150 --> 02:07.610 Let's make it as traps. 02:07.970 --> 02:12.530 We want to put Circle Collider on this so it can damage the player is trigger. 02:14.170 --> 02:20.620 I think it's okay if we make this collider a bit smaller so it's easier for player to play and maybe 02:20.620 --> 02:23.140 like yeah, point 65 looks good. 02:23.560 --> 02:28.030 Now on this object over here we just need to add a rigid body. 02:29.760 --> 02:31.260 And it should be dynamic. 02:31.260 --> 02:35.130 Let's change collision detection to continuous interpolate. 02:35.220 --> 02:39.630 Then we're going to make it as a child of a spiked base like so. 02:39.630 --> 02:42.780 And on the base we have this distant joint. 02:43.230 --> 02:48.420 We can take the spiked ball and drag it to this field connected rigid body. 02:48.420 --> 02:52.830 Now, believe me or not, this will work as it is even now. 02:54.490 --> 02:56.590 It's a swing trap already. 02:56.590 --> 03:00.880 I can just move it here and it's gonna hang like that. 03:02.040 --> 03:02.970 Very cool. 03:02.970 --> 03:10.020 If we wanted to move automatically without interference of developer, we can give it a script. 03:10.020 --> 03:11.880 Let's go to scripts and make. 03:12.860 --> 03:13.910 The sharp script. 03:13.940 --> 03:16.670 Sharp spiked ball. 03:19.280 --> 03:20.270 Oh it's okay. 03:20.300 --> 03:22.850 Then I'm going to select the parent. 03:22.850 --> 03:24.500 Put the script on. 03:25.220 --> 03:29.150 Then inside we can do something like reference to the rigid body we need. 03:29.150 --> 03:30.800 So private RB. 03:31.940 --> 03:33.440 Uh, region by the. 03:34.020 --> 03:40.980 Spike RB and then we want to have serialized field, private float and maybe push force. 03:40.980 --> 03:43.860 Then in the start method we're going to do this. 03:43.860 --> 03:45.840 Let's just do RB. 03:47.450 --> 03:55.010 Actually, let's make vector two push vector equals to new vector two with a push force, and for the 03:55.010 --> 03:56.660 y can be just zero. 03:57.170 --> 03:58.580 Then we're going to do spike rb. 03:58.880 --> 04:03.920 Add force of push vector with a with the force mode impulse. 04:03.920 --> 04:05.030 Just like that. 04:05.300 --> 04:07.280 Now we can save this. 04:07.790 --> 04:09.500 Go back to unity. 04:12.680 --> 04:15.320 We can assign this ball over here. 04:15.680 --> 04:16.580 Come on, boy. 04:17.240 --> 04:17.960 What's up? 04:18.290 --> 04:19.190 Oh, this is rigid. 04:19.190 --> 04:21.350 Body should be rigid body 2D. 04:23.690 --> 04:24.770 A salmon. 04:25.760 --> 04:27.320 Or smooth impulse. 04:27.350 --> 04:29.690 Okay, I'm going to save it. 04:29.690 --> 04:30.590 Go back. 04:32.930 --> 04:37.640 We can drag this to the field and push force can be something like, I don't know, uh. 04:38.480 --> 04:38.840 Ten. 04:38.840 --> 04:39.770 Let's try ten. 04:39.770 --> 04:43.100 And now we can go to play mode and you'll see it will be pushed. 04:43.100 --> 04:49.940 Then it's going to swing like that automatically and it's already dangerous to touch. 04:51.480 --> 04:51.780 Oh. 04:51.810 --> 04:52.710 No damage. 04:52.980 --> 04:53.790 Why not? 04:54.390 --> 04:56.160 Because I forgot to add damage. 04:56.160 --> 04:56.970 Trigger. 04:58.060 --> 04:58.840 Okay. 05:09.880 --> 05:11.350 And I got damaged. 05:11.380 --> 05:12.220 Nice. 05:12.250 --> 05:13.720 Now I want to improve it. 05:13.720 --> 05:17.200 And we can easily do that by adding one more element. 05:17.200 --> 05:19.900 Let's go to graphics traps. 05:19.900 --> 05:20.920 Spike the ball. 05:20.920 --> 05:22.270 There is this chain. 05:22.270 --> 05:25.780 We can take the chain, drag it into the scene somewhere. 05:25.780 --> 05:26.380 Here. 05:26.380 --> 05:29.080 Let's make it as trap. 05:29.740 --> 05:34.990 Going to place it maybe here, and I'm going to make it as child of a drop spike ball. 05:35.380 --> 05:38.620 Now we need to join the chain with the base. 05:38.620 --> 05:40.540 And also we need a couple of more chains. 05:40.540 --> 05:45.190 So I'm going to make one more here and one more over here. 05:46.460 --> 05:46.610 Yeah. 05:46.610 --> 05:49.940 Let's place them with an even distance. 05:53.320 --> 05:53.530 Yes. 05:53.530 --> 05:54.850 Something like this will do. 05:55.700 --> 05:56.870 Okay, I like it. 05:58.500 --> 05:59.940 Should we make bigger distance? 05:59.940 --> 06:01.830 I don't know, looks looks good to me. 06:01.830 --> 06:03.210 So I'm going to keep it this way. 06:03.480 --> 06:03.840 Yeah. 06:03.840 --> 06:08.130 And we need to join these chains with a hinge joint to D. 06:08.700 --> 06:13.050 We're going to add hinge join to D on this game object. 06:13.470 --> 06:14.940 And we're going to go to chain. 06:14.940 --> 06:19.320 Let's select all of them actually and add component of a hinge joint. 06:19.350 --> 06:22.740 Now it's going to have rigid body and hinge joint as well. 06:22.740 --> 06:24.330 Then we're going to go to base. 06:24.330 --> 06:29.040 And as a hinge joint over here as a connected rigid body we're going to choose chain. 06:29.460 --> 06:33.570 Then we're going to select chain and drag chain one to this field. 06:34.120 --> 06:40.090 Then chain one going to be connected with the chain two and chain two going to be connected with a spiked 06:40.090 --> 06:40.990 ball. 06:41.560 --> 06:45.610 And now when you go to play mode you'll see that all of them are connected. 06:46.830 --> 06:48.360 And it swings like that. 06:50.460 --> 06:52.710 And I really like how it looks. 06:53.380 --> 06:55.480 So that's all what we need to do now. 06:55.480 --> 06:58.090 We have a dangerous trap that moves left and right. 06:58.570 --> 06:59.830 Yeah, so that's good. 06:59.830 --> 07:03.880 If you want to make it longer, then you need to add more chains and connect them. 07:03.880 --> 07:06.490 Other than that, I think that's all what we need to do. 07:06.490 --> 07:10.690 Let's go to prefab make it as a prefab GameObject. 07:10.690 --> 07:14.470 And now we can take it, place it somewhere else if you want. 07:14.470 --> 07:20.050 Maybe here you can change push force for this object like maybe uh minus ten. 07:20.050 --> 07:23.560 So it's going to be pushed to the left and that's it. 07:25.820 --> 07:27.830 Now we have a dangerous level. 07:28.770 --> 07:30.780 That is not very easy to beat. 07:38.660 --> 07:40.250 Need to wait for the soul. 07:41.330 --> 07:42.920 Then need to jump here. 07:42.920 --> 07:44.660 Wait for the swing trap. 07:44.660 --> 07:45.860 Take the banana. 07:46.310 --> 07:48.170 Jump, jump, jump. 07:49.350 --> 07:51.030 And a very cool one. 07:51.030 --> 07:51.780 Love it. 07:51.810 --> 07:54.240 Okay, see you in the next video.