WEBVTT 00:00.210 --> 00:05.490 In this lesson, it's going to be a little bit longer because we're going to actually do the destruction 00:05.490 --> 00:08.510 for this ground so that it matches the animation. 00:09.000 --> 00:13.980 So before I get started with that, I wanted to finish talking about the particle system we use to break 00:13.980 --> 00:14.430 this up. 00:14.910 --> 00:16.710 You can see how much I had to break it up. 00:16.710 --> 00:23.700 And I wanted to show you why when I didn't break it up enough, you can see where the chunks were too 00:23.700 --> 00:24.230 big. 00:24.240 --> 00:30.180 And as I collided the proxy geometry into it, it even started to affect the bottom part of it here 00:30.480 --> 00:31.270 towards his feet. 00:31.290 --> 00:33.690 So you want to make sure you have enough geometry. 00:33.960 --> 00:39.810 And one little trick if you're still working on that, or you can just use this scene as well that I'm 00:39.810 --> 00:40.290 working on. 00:40.290 --> 00:45.300 But if you want to do it yourself, one little neat thing I've found, too, was that you could actually 00:45.300 --> 00:51.480 just simulate the particles for a few frames and then you can transform them around. 00:51.660 --> 00:54.360 So we have the particles selected for. 00:54.360 --> 00:55.190 So I can see them. 00:55.200 --> 01:01.890 You can see I have maybe four particles and I could just keep moving these around and running the script 01:01.890 --> 01:09.450 that we have here that we've copied and pasted in so we could transform just the particles around and 01:09.450 --> 01:14.250 then run the script that I gave you for each piece that we wanted to do it. 01:14.250 --> 01:16.860 So we'd select the particles like the piece and then keep going. 01:17.310 --> 01:18.810 So we're done with that. 01:18.810 --> 01:19.860 So I'm going to delete that. 01:20.460 --> 01:26.610 And I also want to mention, you know, of course you can middle mouse drag anything you type in here, 01:26.910 --> 01:30.270 like the script that you paste for the shattering effect. 01:30.690 --> 01:38.610 If you had command to select everything in this meall script section, you can then middle mouse drag 01:38.610 --> 01:42.750 it into the shelf on your custom shelf and make your own button for it so you can just click the button 01:42.750 --> 01:45.040 instead of having to paste it in every time. 01:45.570 --> 01:50.030 So now that we have that done, we want to create the bullet system here and we've done this before 01:50.100 --> 01:51.990 on the other smaller lessons. 01:51.990 --> 01:55.020 But also wanted to mention a couple of things that I noticed with that script. 01:55.350 --> 02:02.430 It had some errant pieces of geometry, a little planes that I had to go in and delete by hand, but 02:02.430 --> 02:03.330 I think I got all of them. 02:03.330 --> 02:04.680 So you just want to look for that. 02:05.070 --> 02:12.870 And then there's these random hidden pieces of geometry that I'm not sure why it would hide it. 02:12.870 --> 02:16.140 So I'm just command clicking on the hidden pieces and deleting them. 02:21.780 --> 02:27.630 So now that we have that done, let's select all of the shards that we've created and then let's go 02:27.630 --> 02:32.940 to the bullet system and of course, we need to make sure that's loaded is always under settings, plug 02:32.940 --> 02:34.370 and manager and bullet. 02:34.860 --> 02:40.650 And we also want to make sure that we have the ABC bullet checked as well, because we're going to use 02:40.650 --> 02:41.390 that here in a second. 02:42.030 --> 02:46.250 So we have bullet and we want to create a rigid set like we've done before. 02:46.260 --> 02:48.990 It's going to explode because we are not on the start frame. 02:49.020 --> 02:50.910 Let's go back to what our star frame is going to be. 02:50.910 --> 02:52.590 And you can see it still hasn't fixed itself. 02:53.010 --> 02:58.020 So we need to click on the bullet solver and go into the attribute editor here and we get all of these 02:58.020 --> 02:59.910 options that we're starting to get familiar with. 03:00.330 --> 03:03.150 So we want the start frame to be what our start frame is. 03:03.420 --> 03:08.310 And of course, the reason why it's on 1001, as I've mentioned before, is because we wanted some pre 03:08.310 --> 03:10.020 roll for other dynamic effects. 03:10.590 --> 03:16.950 The nice thing about Bullet is it has a initially sleeping option here, Senator Bullet, rigid set, 03:16.950 --> 03:18.740 initial state, and we can check that. 03:19.020 --> 03:24.900 And basically what that means is until something collides with it, it will stay the way it is, which 03:24.900 --> 03:25.560 is really nice. 03:26.010 --> 03:29.160 So let's go back to the bullet solver for a second and talk about the gravity. 03:29.520 --> 03:34.790 So the gravity is important because it's going to affect kind of how the scale works on this scene. 03:35.070 --> 03:39.390 So as you remember, Maya thinks one unit is one meter. 03:39.780 --> 03:43.800 And in our case, our character is now 182 centimetres tall. 03:44.100 --> 03:51.420 So Bullet Solvers is going to think that this is 182 meters long of a piece of ground here that we've 03:51.420 --> 03:51.720 made. 03:52.140 --> 03:59.130 And for that to have the right physics, we can just increase the gravity by 100. 03:59.520 --> 04:06.480 So we can just make it, you know, times that by 100 and it'll be 980 instead of nine point eight. 04:06.930 --> 04:12.570 So that will help us get to the correct scale of our scene so that everything will fall accordingly. 04:13.000 --> 04:15.250 Now, let me show you what happens when you don't do that. 04:16.140 --> 04:20.880 This is a test I did earlier and I set the I didn't change the gravity. 04:21.180 --> 04:25.950 So you can see how everything is moving in slow motion and very slowly. 04:26.430 --> 04:28.640 So we don't want that. 04:28.680 --> 04:31.320 So now that we have gravity set correctly, it'll work. 04:31.770 --> 04:39.180 And we don't want to use the ground plane because our geometry is actually just below the ground plane, 04:39.330 --> 04:40.240 just below zero. 04:40.620 --> 04:42.210 So we've made our own ground plane. 04:42.240 --> 04:50.550 I'm at five so we can see it and it's down here and I move it just below the geometry here. 04:50.550 --> 04:52.920 So it's not starting to collide with it at the very beginning. 04:53.340 --> 04:59.370 And this is just going to be our, you know, playing our ground plane because that's below, you know, 04:59.370 --> 05:00.930 zero is this plane. 05:00.930 --> 05:02.820 And we wanted one that kind of goes in the ground. 05:02.820 --> 05:04.760 So that's why we need to make our own ground plane. 05:05.250 --> 05:09.300 So with that selected, I can go to Bulleit and set passive rigid body. 05:09.570 --> 05:11.160 You might get an air and that's OK. 05:12.210 --> 05:17.940 I'm going to just leave all of this the same, except for I'm going to make this a plane, which means 05:18.240 --> 05:20.130 it'll go off in all directions. 05:20.220 --> 05:23.280 OK, I'm going to maybe crank that down just a little bit. 05:23.880 --> 05:29.880 And now we can also said this is a passive glider, so I'll use Bullet Pasturage body. 05:30.390 --> 05:38.040 And instead of the plane, because this has a donut kind of hole in the middle, we can't use any of 05:38.040 --> 05:42.290 the ones we've been using because they are kind of all intact versions. 05:42.290 --> 05:43.380 So what we want is mesh. 05:43.650 --> 05:47.820 And this will respect the fact that there's a hole in the middle so that we don't think it's colliding 05:47.820 --> 05:48.780 in the center of this thing. 05:49.140 --> 05:50.060 So it's like the mesh. 05:50.070 --> 05:52.500 And then I'll reduce this by a little bit as well. 05:53.040 --> 05:54.330 And mass is OK. 05:54.330 --> 05:55.200 It's a static body. 05:55.200 --> 06:00.030 And just in general know that static, rigid bodies are quicker to compute because they're not having 06:00.030 --> 06:03.530 to compute changes in position, of course, because they're not going anywhere. 06:04.080 --> 06:09.110 So now that we have those two things done, I also wanted to introduce this little guy. 06:09.120 --> 06:16.950 I'm going to shift H and it's basically kind of a container to keep the ground from expanding out. 06:16.950 --> 06:21.450 So let me just selecta those two things and isolate them so you can see what I'm talking about. 06:23.310 --> 06:26.920 So you isolate selected the shards. 06:26.920 --> 06:28.200 Let me select high. 06:28.680 --> 06:29.820 Oh, it had everything. 06:29.820 --> 06:35.210 Because now we're working at the so when you when you make Bullett it'll make its own piece of geometry 06:35.210 --> 06:35.490 here. 06:35.490 --> 06:39.150 So that's why I wasn't getting isolated, selected. 06:39.150 --> 06:40.160 So now it'll work. 06:40.410 --> 06:44.370 So basically just kind of keeps it all contained so everything can expand outward. 06:44.730 --> 06:48.750 So that will help it kind of keep its shape as it's simulating. 06:49.050 --> 06:57.240 So let's create another passive rigid body and like we did for the other ground, we want to make sure 06:57.240 --> 07:02.820 that the Kliner properties is set to mesh the Claitor shape and then going to reduce this down all the 07:02.820 --> 07:03.060 way. 07:03.630 --> 07:03.960 Cool. 07:04.680 --> 07:06.390 So let's go back to the solver. 07:06.480 --> 07:07.200 Take a look at that. 07:07.200 --> 07:09.450 We have our gravity set properly. 07:09.450 --> 07:16.080 We have the start frame set properly, and we need to increase the mass as well. 07:16.080 --> 07:19.920 If you think about all the physics of this, if you know we're having to. 07:19.980 --> 07:27.060 Increase the gravity by 100 times, we should do that for everything, basically, but we can start 07:27.060 --> 07:32.520 out with maybe like something like 10 instead of doing 100 times, let's do like 10 times. 07:32.940 --> 07:34.600 And it's initially sleeping. 07:34.620 --> 07:39.930 And again, we want to change this to whole like we've learned and other lessons and turn on glue shapes 07:39.930 --> 07:44.970 and let's just crank that all the way up, because this will also be affected by the scale of seen and 07:44.970 --> 07:45.830 gravity and all that. 07:46.170 --> 07:51.630 So we need to increase the force of this because gravity is going to be pulling on it 100 times harder 07:51.630 --> 07:52.280 than usual. 07:52.590 --> 07:57.760 So this value might need to be even need to be a thousand or something later we'll find out. 07:58.200 --> 08:02.940 So the next thing I want to do is to mimic the animation of the hand. 08:03.240 --> 08:08.760 And I don't want to use the actual animation of the skeleton because it's a lot of geometry in here 08:08.760 --> 08:13.520 and a lot of things could get stuck in between the fingers and in between the bones and all that. 08:13.530 --> 08:18.870 And so what I want to do is actually create a new piece of geometry and I'm just going to create a sphere 08:19.290 --> 08:21.000 and I'm going to move that into place here. 08:21.420 --> 08:28.560 And with that selected, I'm going to scale it up and kind of scrub in a timeline to see where the hand 08:28.560 --> 08:29.610 is coming through. 08:30.270 --> 08:33.270 And I'm going to place this kind of in that general area. 08:35.080 --> 08:42.460 And I'm going to leave it kind of scaled up like this, and just so it kind of has a healthy kind of 08:42.460 --> 08:43.300 padding around it. 08:43.630 --> 08:48.300 So it's this is basically what's going to be colliding with the rigid set that we've created. 08:48.700 --> 08:51.100 So when I set out there, I'm not going to animate anything yet. 08:51.100 --> 08:57.010 And this is another little tricky thing with the bullet you would learn anyways eventually. 08:57.310 --> 09:01.030 But basically, if you animate this and you choose it to be part of bullet, then it'll delete all the 09:01.030 --> 09:01.510 animation. 09:01.960 --> 09:05.950 So we need to create an active body first and now we can do the animation. 09:06.190 --> 09:10.150 But the other little thing that I mentioned before, I believe, is we want to switch is the kinematic 09:10.160 --> 09:13.270 so it will respect the key frames that we set. 09:13.630 --> 09:18.010 And then also I want to increase the mass and I want to be much more than the mass we've set for the 09:18.010 --> 09:22.320 shards because it needs to overcome that weight and really push them out of the way. 09:22.330 --> 09:24.420 So I'm going to set this to like something like 500. 09:24.760 --> 09:29.770 So it's five times as much as the shards themselves right now. 09:29.770 --> 09:33.640 I believe this a box, because that's just easier to compute. 09:33.940 --> 09:37.000 And I'm going to leave the margin on for a little bit. 09:37.280 --> 09:39.190 So now I can start to keyframe this thing. 09:39.190 --> 09:41.710 And I have four just so I can see the animation beneath this. 09:42.070 --> 09:49.540 And I'm going to step through this animation and make sure everything is going to be on the right frame. 09:49.540 --> 09:51.400 Something else to set keyframes. 09:53.050 --> 09:59.800 And five, to make sure I'm kind of reading the silhouette correctly here, maybe push this forward 10:01.000 --> 10:05.620 and then let's take a look at under four again to make sure we're following the first. 10:07.730 --> 10:14.870 And the other thing we need to know is the fact that with initially sleeping, if anything is kind of 10:14.870 --> 10:20.690 intersecting anything, even if it's a static, rigid body and this is kinematic, it will trigger the 10:20.690 --> 10:21.380 simulation. 10:21.410 --> 10:24.320 So we need to make sure that this is not touching the plane. 10:24.590 --> 10:29.150 Otherwise, initially, sleeping would not work for these Shahd sets and everything would start from 10:29.150 --> 10:29.870 this first frame. 10:30.290 --> 10:36.200 So currently what will happen is it will only start the simulation as soon as this fear that we've created 10:36.470 --> 10:39.100 rams in to the first shard here. 10:39.740 --> 10:41.030 So that's pretty cool. 10:41.360 --> 10:47.120 So the next thing we need to do is continue this animation because the hand kind of comes down here 10:47.480 --> 10:50.060 and we want to make sure that we're going to be able to see that somewhat. 10:50.520 --> 10:52.820 So we need to continue this animation. 10:53.930 --> 10:56.500 So I want to make sure I get the Antec of the hand in there as well. 10:57.590 --> 11:00.710 It's going to get the first frame there and set it kind of keyframe. 11:01.830 --> 11:05.430 And then get the antic in there, this frame. 11:08.450 --> 11:10.430 And then we'll start this. 11:11.360 --> 11:16.040 And we'll rotate it just a little bit, and I don't know why does this, but it kind of spazzes out 11:18.420 --> 11:20.300 just some goofy thing that bullet does. 11:20.300 --> 11:27.110 And I will say, I mean, of all the Sims and solvers you can use in my bullet is kind of can be a little 11:27.110 --> 11:29.300 bit wonky sometimes and frustrating. 11:29.300 --> 11:32.750 But, you know, if you get it done right away, it's pretty nice. 11:33.980 --> 11:35.680 It's an open source software. 11:36.440 --> 11:42.890 So Maya doesn't really support the, you know, from a technical perspective, doesn't really support 11:42.890 --> 11:42.980 it. 11:43.100 --> 11:48.290 So if you ask Autodesk for help, they're not going to really help you that much because it's not their 11:48.290 --> 11:55.010 product, but it's an open source dynamic system that's basically meant for games. 11:55.340 --> 12:02.960 But, yeah, Autodesk decided to include it as well, because I think it does have some use for, you 12:02.960 --> 12:05.600 know, just trying to get some basic stuff simulation. 12:05.600 --> 12:09.250 And you don't have to go through like a ton of crazy steps. 12:09.260 --> 12:11.240 There are some finicky things here that we're learning about. 12:11.240 --> 12:19.130 But, you know, in general, this isn't that bad really, as far as dynamics are concerned, to set 12:19.130 --> 12:20.680 something up that actually kind of works. 12:21.740 --> 12:23.030 So I'm trying to move that there. 12:23.810 --> 12:31.430 OK, and then the next thing I'm going to do is create another sphere and make it a active body and 12:31.430 --> 12:36.740 turn it back to kinematic, because this is going to be our body busting through. 12:36.740 --> 12:37.720 So we increase that. 12:37.770 --> 12:38.800 It's much bigger. 12:39.320 --> 12:45.380 And of course, I want that below the plane again because I don't want it to trigger the initially sleeping 12:45.890 --> 12:46.820 thing that we have set. 12:47.330 --> 12:54.970 So I'm going to position this here and then scrub through the looks like it snaps back there. 12:55.340 --> 12:56.960 Let's set a keyframe here, then. 12:58.400 --> 13:04.250 Man, this is super wonky, sometimes you can see how I'm just clicking and snapping at it kind of to 13:04.250 --> 13:05.420 another location. 13:05.750 --> 13:09.440 Let me s and let's see if it's keyframes. 13:09.440 --> 13:09.620 Cool. 13:09.620 --> 13:10.010 It did. 13:10.670 --> 13:12.980 So now with those key frames, it should kind of. 13:13.040 --> 13:13.310 Yeah. 13:13.310 --> 13:15.080 Now it's kind of respecting where I'm putting it. 13:15.470 --> 13:18.910 So I just know that's kind of another little quirk of the system. 13:19.700 --> 13:22.070 So now we can start scrubbing forward. 13:23.790 --> 13:27.530 Someone here is going to start busting through right in their face when it? 13:27.540 --> 13:28.350 S here. 13:29.360 --> 13:32.240 And want to. 13:33.640 --> 13:35.050 I'm going to push this through. 13:42.250 --> 13:49.360 And I might get that to happen maybe a little sooner, because I'm also conscious of the speed of this 13:49.360 --> 13:54.840 thing coming through, if it goes through too fast, this might not really catch it. 13:55.300 --> 14:00.610 So I want to make sure it's kind of going through at a speed that the salver can kind of find it and 14:00.610 --> 14:02.110 actually solve for that. 14:03.050 --> 14:07.450 So, yeah, so now I'm just going to kind of follow this through again, maybe scale this up. 14:07.450 --> 14:10.380 So it really kind of rocks the world here. 14:11.370 --> 14:16.740 I don't really like how wide that is, that might cause other problems, let's maybe scale it in a little 14:16.740 --> 14:19.890 bit and scale it in a little bit here. 14:22.440 --> 14:22.990 Cool. 14:23.010 --> 14:27.960 So now we have that and then we just kind of need to finish this animation out kind of tracking, because 14:27.960 --> 14:33.450 I think, you know, when he's in midair, we don't want a piece of that shard to kind of be blocking 14:33.450 --> 14:34.350 his face or something. 14:34.350 --> 14:37.020 So I'm going to favor kind of his torso here. 14:38.320 --> 14:42.430 And everything else should happen kind of fast enough that it won't. 14:43.680 --> 14:48.120 You know, you won't be able to really tell if, like, a piece is like going through his arm or something 14:48.810 --> 14:50.750 because it'll all be kind of happening so fast. 14:50.760 --> 14:52.530 So we kind of use that to our advantage here. 14:53.430 --> 14:54.180 All right. 14:57.420 --> 15:06.780 Excuse me, it's been a long day at the studio working on a movie for a studio and. 15:07.930 --> 15:14.800 My my voice is starting to go now recording these videos, so, all right, now we have this done and 15:15.340 --> 15:18.460 what we can do is just go ahead and cash it out. 15:19.450 --> 15:25.120 Like I said earlier, you know, if I were to hit play on this, I mean, we can just go and do that 15:25.120 --> 15:27.820 once just to make sure it's not going to do something totally crazy. 15:29.050 --> 15:34.090 But what I like to do, you know, when I realize it's kind of working is just go and cash it out because 15:36.310 --> 15:38.310 bullet will not be consistent with the results. 15:38.650 --> 15:44.560 So if you play it back and you see that you like what you've got, then you're out of luck. 15:44.560 --> 15:48.880 If you play again and try to cash it because you're not entirely guaranteed the same simulation. 15:49.960 --> 15:52.720 So everything looks kind of good so far. 15:53.620 --> 15:55.260 It's going to be a little busy. 15:55.270 --> 15:56.920 Things are kind of still moving around. 16:02.640 --> 16:05.130 Cars work, and though I'll be honest. 16:08.140 --> 16:12.820 Only a little goofy things of that peace is going to be blocking the hand, but you cannot direct this 16:12.820 --> 16:19.960 stuff as much as you want by you know, you go back in and reanimate that hand or the sphere that we 16:19.960 --> 16:20.650 have for the hand. 16:20.930 --> 16:23.220 But in general, I think this is in a good spot. 16:23.620 --> 16:28.660 So there's a couple more things we need to now that we're going to cash it out, because basically every 16:28.660 --> 16:32.800 time we're doing something, we don't want to have this other thing solving every time that we play 16:32.800 --> 16:33.210 back. 16:33.580 --> 16:37.390 So we want to cash this out so we kind of save it and break it down to the geometry. 16:37.990 --> 16:42.760 So to do that and bullet, we need to select the set that was made. 16:42.760 --> 16:48.070 When we make a bullet solver, there's this little set that gets made and we want to make sure that 16:48.070 --> 16:49.620 we do not go into cash. 16:50.020 --> 16:51.610 You know, I'm saying we're doing caches. 16:51.610 --> 16:54.940 You have to do an Olympic cache through the bullet menu. 16:55.270 --> 16:56.860 Otherwise you're going to get a bunch of errors. 16:56.870 --> 16:59.680 And so this is another kind of gotcha moment. 16:59.830 --> 17:03.120 And Maya, do not use this cash bullet. 17:03.430 --> 17:07.700 You have to use the bullet menu to export selection to Olympic. 17:07.750 --> 17:08.110 All right. 17:08.410 --> 17:14.260 And the other little gotcha moment is you want to switch to the HD five file format. 17:14.290 --> 17:17.380 That's how bullet reads that it doesn't know this file format. 17:17.380 --> 17:22.480 So we need that one and we can see our, you know, range is cracked and all that kind of good stuff. 17:22.870 --> 17:27.010 So I'm going to choose this name for the Olympic and I'm going to export that. 17:27.010 --> 17:28.330 And I'll see you in one second. 17:33.890 --> 17:38.510 So now that our cash is done, we can actually import it and we want to make sure that we have this 17:38.510 --> 17:44.270 chards group selected and with the shards groups like that, we can use this, let cash import now we 17:44.270 --> 17:45.560 can use this to import it. 17:46.070 --> 17:51.010 So it's going to import and we want to make sure normally it's set on this import tahseen. 17:51.260 --> 17:52.920 We want to change it to merge. 17:53.450 --> 17:59.750 So what is basically doing is it's going to assign these values to this group because it all has the 17:59.750 --> 18:00.610 same names. 18:01.310 --> 18:06.860 That's what that rigid set created, that each individual piece has a name associated with it. 18:06.870 --> 18:11.190 So when it's cashing it out, it addresses that name to that piece. 18:11.210 --> 18:18.140 So we're reassigning this animation in the simulation back down into the original pieces. 18:18.140 --> 18:24.020 And so this you could actually use this to use low res geometry. 18:24.440 --> 18:24.890 Right. 18:24.890 --> 18:30.650 And then do the simulation with low res geometry and then have high res pieces of geometry that you 18:30.650 --> 18:36.050 merge it on to so that when you're doing the simulation, it can be much quicker because you're using 18:36.050 --> 18:37.040 low res geometry. 18:37.370 --> 18:42.860 But then when you're actually going to use it as a cache in the scene, then you can use the high res 18:42.860 --> 18:46.040 pieces and choose that group that would be associated with that. 18:46.160 --> 18:46.970 Oh, that makes sense. 18:48.020 --> 18:50.210 It's just kind of that's more of an advanced feature. 18:50.540 --> 18:52.700 But just wanted to mention that's a possibility. 18:53.040 --> 18:55.940 So now that we have that set, let's just delete the bullet system. 18:55.940 --> 19:00.740 And when we don't want to delete it just by selecting it, we want to go to bullet and then delete entire 19:00.740 --> 19:01.410 entire system. 19:02.060 --> 19:08.120 So now we can play back, we can just scrub and we should be able to see all of this animation on our 19:08.120 --> 19:09.460 original shards here. 19:09.800 --> 19:11.250 So that is pretty cool. 19:11.600 --> 19:16.820 So the only thing left to really say is the fact that, you know, we have some interpenetration here 19:16.820 --> 19:22.730 on the hat and this so we could, you know, turn this into a passive rigid body. 19:23.000 --> 19:29.450 We can make some proxy geometry like a sphere or something to, you know, guard this piece just like 19:29.450 --> 19:30.200 we animated this. 19:30.200 --> 19:34.090 We could use it as a static, rigid body, just like we're using the floor as a static, rigid body. 19:34.580 --> 19:37.490 So all in all, it looks like it works pretty well. 19:37.790 --> 19:44.440 We learned how to create a bullet semb and then cash it out and then re-import it. 19:44.450 --> 19:46.640 So it's been a pretty big lesson here. 19:46.940 --> 19:52.100 And I think this is going to prove pretty helpful down the road when you need to do a big simulation 19:52.100 --> 19:52.870 of a lot of things. 19:53.210 --> 19:55.400 So, yeah, this is just one way to do it. 19:56.120 --> 20:03.080 And we will, yeah, carry on in the next lesson with learning some more dynamic simulations. 20:03.080 --> 20:04.730 And Maya, thanks for watching.