WEBVTT 00:00.150 --> 00:04.710 In this lesson, we're going to smash a ball through the brick wall that we've modeled and we're going 00:04.710 --> 00:09.060 to use that with a bullet system, and I should take a step back and say, you know, the first lesson 00:09.060 --> 00:11.370 we talked about soon, scale and how important that was. 00:11.700 --> 00:20.220 And for the bullet solver, it's a little different bullet solvers based on game dynamics and the scene 00:20.220 --> 00:27.150 scale is more specific to the solver in my effort, in cloth, in dynamics, in hair, all that kind 00:27.150 --> 00:27.520 of stuff. 00:27.900 --> 00:32.340 So we're actually going to not care as much about the scale at the moment. 00:33.150 --> 00:38.490 If we didn't like the speed of things in the bullet solver, we would mess around with the mass of the 00:38.490 --> 00:41.310 objects for our purposes right now. 00:41.340 --> 00:43.250 This should work pretty well, I think. 00:43.260 --> 00:44.780 So let's just move forward with that. 00:44.790 --> 00:52.080 So I'm going to create a ball and I'm also, in a later lesson, going to show you another way to use 00:52.080 --> 00:55.040 the bullet solver for our kind of main scene. 00:55.470 --> 01:04.830 So let's just position this ball sphere and where you know a little ways in front of the wall and let's 01:04.830 --> 01:08.400 select all of the wall, every piece. 01:08.760 --> 01:11.480 And first, we need to load the bullet solver. 01:11.490 --> 01:16.320 So let's go to the Settings and Preferences plugin manager, and we need to make sure it's loaded. 01:16.320 --> 01:18.210 So it's loaded here, auto load. 01:18.750 --> 01:23.610 And when we go over to effects, we should have an option here that says bullet. 01:24.330 --> 01:31.530 And because we want this whole system to act together and basically be a set because it's a wall, we 01:31.530 --> 01:33.200 want to choose rigid set. 01:33.780 --> 01:37.140 So now we have in our outliner a couple of new things. 01:37.140 --> 01:40.550 We have the bullet rigid, set solid. 01:40.560 --> 01:42.270 We have the bullet salver itself. 01:42.690 --> 01:48.930 And if we open up the attribute editor here and we go to the bullet tabs here, we get some interesting 01:48.930 --> 01:54.220 new options that will help us set the type of simulation that we want. 01:54.570 --> 01:57.560 So if, again, we want to make sure we. 01:57.570 --> 01:57.750 Right. 01:57.750 --> 02:05.490 Click on the timeline and go to playback speed and that it's set to play every frame and that'll make 02:05.490 --> 02:08.070 sure that it calculates the simulation correctly. 02:08.760 --> 02:12.330 I'm going to extend this out just so we have a little more time here in our timeline. 02:12.780 --> 02:17.280 And if I had play right now, it's just going to drop to the ground because we haven't chosen to turn 02:17.280 --> 02:17.910 on the ground plane. 02:17.920 --> 02:21.300 So if we turn it on, I'm going to guess things are going to explode a little bit. 02:22.160 --> 02:26.970 Okay, this is one thing that I forgot, because this brick is out by itself. 02:26.970 --> 02:27.870 It's going to fall off. 02:28.590 --> 02:32.400 We could, you know, delete the bullet solver and delete that little piece. 02:32.410 --> 02:37.090 Actually, I think we can exclude it if we found it in here. 02:37.090 --> 02:43.710 You actually exclude it by going to bullet rigid sets, remove selected where we could say select bullet 02:43.710 --> 02:50.910 solver and then delete it, delete entire bullet system and delete this tiny little brick in the corner 02:50.910 --> 02:56.160 so it doesn't fall off and then recreate that, make another rigid set again. 02:56.610 --> 02:59.850 But anyway, that's if you just want to fix that, that's how you could do it. 03:00.390 --> 03:05.760 So let's grab this and let's make a active body. 03:05.760 --> 03:08.610 We're going to get in there, which is just kind of a buggy thing. 03:08.610 --> 03:11.370 I will admit bullet solver is kind of buggy. 03:12.180 --> 03:16.830 It's not perfect for everything, but there's some cases where it works pretty well and these rigid 03:16.830 --> 03:17.790 body examples. 03:17.790 --> 03:20.700 So now we have this sphere selected. 03:20.700 --> 03:26.040 It has its own rigid body attributes. 03:26.800 --> 03:32.430 Now, if we wanted to animate the ball ourselves flying through the wall, we could do that again. 03:32.430 --> 03:38.610 We could seddiqui just like reset keys and other parts of the series of this course. 03:39.660 --> 03:43.260 But we want to make sure that we have the body type set to kinematic. 03:43.710 --> 03:51.630 And so kinematic means that it will respect any animation you have on an object and it will not include 03:51.630 --> 03:55.950 it in the simulation in the sense that the wall will not affect the ball. 03:56.160 --> 04:00.690 OK, but the ball will affect the wall if we animated into the wall. 04:01.050 --> 04:06.870 Well, I'm going to do is leave it as a dynamic, rigid body and then I'm going to give it an initial 04:06.870 --> 04:07.500 velocity. 04:07.500 --> 04:10.220 So that will fly forward and forward. 04:10.230 --> 04:17.490 And this case is going to be negative X so we can say, you know, we know X, Y and Z, we can see 04:17.490 --> 04:18.600 this is initial velocity. 04:18.600 --> 04:23.520 So we can kind of you know, these are our common sense here and think, OK, this is maybe what we 04:23.520 --> 04:29.040 want because initial velocity when initially, you know, give it a speed and we want it to be negative 04:29.040 --> 04:35.280 X, which is the first one here, because most everything Amyas, X, Y, Z, so X, Y, Z, same thing 04:35.280 --> 04:36.090 down here, X. 04:36.570 --> 04:37.710 Well, this is Matrix. 04:37.710 --> 04:42.300 So it's a different thing, but same thing with velocity, angular velocity. 04:42.300 --> 04:45.270 This would spin it around if we wanted to spin it around. 04:45.810 --> 04:53.310 So let's give it a negative, maybe fifty, something like that, and let's hit play. 04:53.340 --> 04:55.110 Things are going to probably explode a little bit. 04:55.320 --> 04:56.460 Not too bad actually. 04:57.660 --> 04:59.790 Let's give it more mass instead of increasing the. 05:00.820 --> 05:05.170 We can just give it more mass, you can see right now, it kind of has a hard time going through, but 05:05.170 --> 05:11.620 if we just increase the mass a little bit, I suspect this will have no problem going through coal. 05:11.680 --> 05:18.680 So we've created our first simulation and Miah using the bullet solver in the blood system here. 05:19.060 --> 05:26.380 Now, the other thing is we could create a glue system here. 05:26.380 --> 05:32.800 If we like this and we go to the initial state here, we can say glue shapes and just crank this up. 05:32.980 --> 05:36.610 And that's supposed to help keep the bricks together. 05:37.870 --> 05:41.200 But, you know, you can't really tell that big of a difference between what we just did. 05:41.210 --> 05:44.470 You have to crank these values up pretty high for our case. 05:44.470 --> 05:48.820 The way out of this, it works pretty well and. 05:49.950 --> 05:55.200 Because we're using the dynamic simulation for the ball, it's actually being affected by the wall, 05:55.200 --> 06:00.000 trying to keep it from moving forward so it slows down as it hits the wall, which is kind of nice. 06:00.000 --> 06:01.810 If you try to animate that, it might be kind of difficult. 06:02.190 --> 06:09.920 So one kind of tricky thing that might be fun is if you want to use this to start with, what's let's 06:09.930 --> 06:16.290 maybe actually let's leave that where it is and decrease the mass a little bit, we can actually make 06:16.290 --> 06:23.580 the simulation of this ball so we could go edit keys, big simulation, and just the defaults are going 06:23.580 --> 06:25.110 to break every frame here. 06:25.650 --> 06:32.010 And then so we have this ball is key framed its position on everything. 06:32.610 --> 06:37.900 But, you know, none of that will matter unless we say kinematic rigid body. 06:37.920 --> 06:44.400 So now we know it'll always use that same animation that we just send and use in the simulation. 06:44.400 --> 06:50.190 So it'll actually make the simulation run a little faster because it's not having to dynamically calculate 06:50.670 --> 06:52.990 the ball being affected anymore by the wall. 06:53.400 --> 06:57.930 So that's one little kind of, you know, workflow thing that might speed things up. 06:57.930 --> 06:59.630 But in our case, there's a pretty simple scene. 06:59.940 --> 07:03.770 So, yeah, that's how you break a wall with the system. 07:04.090 --> 07:07.080 And the next lesson we are going to look at shattering objects. 07:07.440 --> 07:11.610 And I've got a special script that is actually going to help quite a bit with that. 07:11.910 --> 07:18.810 And we're going to learn how to work around some finicky issues with Maya regarding shattering objects 07:18.810 --> 07:20.730 and using the bullet system with them. 07:21.090 --> 07:21.630 Thanks for watching.