WEBVTT 00:00.420 --> 00:06.810 Welcome to animating with physics so animating physics were one thing to remember is blender actually 00:06.810 --> 00:09.660 allows you to annamay Almost everything. 00:09.660 --> 00:14.190 Now moving of animation she usually thinking about just moving something. 00:14.380 --> 00:22.380 But we can use this feature of blender to toggle whether we are in control of I.e. we were running an 00:22.380 --> 00:29.350 animation moving something let's say or the physics engine itself is in charge of the mesh. 00:29.400 --> 00:34.980 Now Blender's physics engine is great it will remember what has just happened in the animation. 00:34.980 --> 00:40.030 So if it was travelling at a certain speed it will continue travelling that certain speed. 00:40.110 --> 00:47.280 But then with physics applied to it and we're also going to have a quick peek at the graph Ed and that 00:47.280 --> 00:53.140 will become apparent why we need to do that as soon as we hop on over in a blender. 00:53.400 --> 00:58.740 Okay so we're over in blender and the first thing we need to do here is set the scene so I'm going to 00:58.800 --> 01:00.390 add a plane. 01:00.510 --> 01:05.670 So we've got a ground and scale that up by now them a large number. 01:05.790 --> 01:08.100 So well actually that's very large. 01:08.100 --> 01:09.380 Never mind that will do. 01:09.510 --> 01:15.260 And I'm going to immediately apply a rigid body physics to the ground and make it passive. 01:15.360 --> 01:19.570 I'm going to lift the cube out to the ground he says having grap the wrong thing. 01:19.590 --> 01:20.410 There we go. 01:20.640 --> 01:28.500 Let's move it on the z axis so GZ one lift it up and I'm going to duplicate that so there's the extra 01:28.500 --> 01:30.520 cube and I'm going to move that new one. 01:30.540 --> 01:31.560 G Why. 01:31.590 --> 01:33.500 I don't know three. 01:33.540 --> 01:33.900 There we go. 01:33.900 --> 01:34.980 So they are separate. 01:35.040 --> 01:38.550 So we've got two cubes here and I'm going to add a rigid body to both of them. 01:39.360 --> 01:40.730 So we're ready to go. 01:40.740 --> 01:47.970 Now the the thing to bear in mind here is this little check box when we're dealing with an active rigid 01:47.970 --> 01:54.720 body there's a little tick box that tells the blender basically whether or not it's animated or not. 01:54.720 --> 01:57.950 And that's the thing that we can toggle with a key frame. 01:58.290 --> 02:02.150 So first of all let's let's set up a key frame for both of these. 02:02.150 --> 02:08.760 In the starting location now there is a couple of ways of doing this and I'm going to open up the properties 02:08.760 --> 02:12.540 panel and using the Iki to insert a key frame. 02:12.540 --> 02:14.580 I'm going to hover over the area. 02:14.610 --> 02:19.460 I want to key in and we will see a yellow bar appear here. 02:19.650 --> 02:24.460 So let's go ahead and do that so I've got this cube here selected. 02:24.570 --> 02:27.510 I'm going to press I and we can see a little yellow bar. 02:27.510 --> 02:32.940 So if I move that has appeared which means that it has remembered exactly where it is I'm going to do 02:32.940 --> 02:37.900 the same to this cube here I'm going to hover over its location and press I. 02:38.140 --> 02:38.670 Excellent. 02:38.690 --> 02:40.320 So that's a great start. 02:40.320 --> 02:43.050 We've keyed in the beginning position. 02:43.050 --> 02:49.330 Now we need to move one of them by a certain amount of code to move them both to the same place. 02:49.350 --> 02:55.520 First of all so I'm going to go to the side view in orthographic sides of the relined. 02:55.530 --> 02:56.470 There we go. 02:56.640 --> 03:01.800 Move them positive x and I'm going to turn snapping on so we can align them perfectly and then move 03:01.800 --> 03:05.720 it along here and then up to about here. 03:05.820 --> 03:11.060 He says having not locked in fully and I'm going to do the same to the other one here. 03:12.060 --> 03:12.730 Okay. 03:12.780 --> 03:14.940 Now I did fiddle about. 03:14.940 --> 03:17.340 Fortunately I've not lost anything which is good. 03:17.460 --> 03:21.690 I really should place the frame first because if you go over the top. 03:21.690 --> 03:22.920 In fact I'm going to do it. 03:23.160 --> 03:29.160 If you go over the top of a Already key framed it moves along some and the set this at 30 frames. 03:29.490 --> 03:32.050 And we've got our cube up here. 03:32.190 --> 03:36.780 Fortunately it seems to have remembered that it had been moved which is good. 03:36.990 --> 03:44.490 So we're going to set it at 30 and we can see the no frame we're on both here in the 3D window and the 03:44.490 --> 03:48.320 lower left and also down here as well on the timeline. 03:48.480 --> 03:53.340 So I'm going to key in that one and are going to click again and key in the other one. 03:53.430 --> 03:59.070 Okay so now both of them are keyed in and if we play the animation will see that it moves from one place 03:59.070 --> 04:00.060 to the other. 04:00.060 --> 04:00.930 No it doesn't. 04:00.930 --> 04:02.290 So why doesn't it. 04:02.460 --> 04:07.020 It's just behaving with physics at the moment because we have not said to animates it. 04:07.020 --> 04:09.410 So now we've put a tick in the animated box. 04:10.360 --> 04:13.850 We should find it moves from one place to another. 04:14.590 --> 04:17.870 Our turns out here both the key frames are in the same position. 04:17.890 --> 04:19.990 Okay so it didn't hold that. 04:19.990 --> 04:22.660 Let's move that one and move this one. 04:22.990 --> 04:23.740 Okay excellent. 04:23.740 --> 04:25.700 Let's key in that. 04:25.990 --> 04:31.190 And key in the other one hovering over and pressing eilerts to make sure it is working now. 04:31.390 --> 04:32.400 Excellent. 04:32.410 --> 04:38.110 So the one thing I want to do here is actually move one to the same place but in a lot shorter time 04:38.140 --> 04:41.660 and then we can compare the two when we switch physics off. 04:41.710 --> 04:44.420 So I'm going to go to where it is at 30. 04:44.530 --> 04:52.200 But this time actually key in these figures earlier on say it's fifteens it's moved very quickly. 04:52.270 --> 04:54.990 So when I go to frame 15. 04:56.600 --> 05:05.400 I took notes of one of them there and this was five and six I believe six. 05:05.420 --> 05:09.500 So this cube here is going to get to the end location a lot quicker than the other one and I'm going 05:09.500 --> 05:10.600 to keep that in. 05:11.760 --> 05:15.150 Now I need to remove what I've already keyed in. 05:15.240 --> 05:18.160 So see we've got a she got a key frame applied here. 05:18.360 --> 05:24.920 So that particular cue which would be a bit disastrous if we wanted the physics engine to take over. 05:25.170 --> 05:29.360 But what we can do here is simply delete that particular one. 05:29.370 --> 05:34.230 Now a couple of ways of doing that I'm going to switch over to the graph Ed in a second because one 05:34.230 --> 05:40.080 of the problems if you look at half a cube are going to play the animation here see it move. 05:40.080 --> 05:44.540 Notice that it's it's dampened at the end it's start slowing down. 05:44.700 --> 05:47.230 And that is because of the graph Ed. 05:47.550 --> 05:53.700 It's not linearly going between one place and another as she starts a little slower speeds up and then 05:53.700 --> 05:55.110 slows back down again. 05:55.290 --> 06:00.610 So I'm going to change this view this that's actually move this up so we can see more and more changes 06:00.630 --> 06:03.340 view here to the graph ed. 06:03.930 --> 06:04.980 So here we go. 06:05.100 --> 06:07.530 We've got the cube that we've got selected. 06:07.620 --> 06:11.340 And we can see that there's a slight S curve going through. 06:11.340 --> 06:17.660 Now this is actually controlling how it's moving in the x and z z direction there. 06:17.670 --> 06:22.680 And it's got no movement in the Y which is absolutely fine that is what's happening. 06:22.680 --> 06:26.190 But here we have the actual points themselves. 06:26.190 --> 06:30.430 And it's this this set over here the end ones that we don't want anymore. 06:30.540 --> 06:31.820 So I'm going to right click on those. 06:31.820 --> 06:34.060 The selection is just like it is normally. 06:34.140 --> 06:36.820 And then hit the X and delete the key frames. 06:36.930 --> 06:37.660 There we go. 06:37.780 --> 06:38.790 That's that sorted. 06:38.790 --> 06:43.200 The other thing I want to sort out whilst I'm in this graph editor and I'm going to play with anything 06:43.200 --> 06:50.550 else but like a Bezier curve it has handles and we can change the type of handle and we can do that 06:50.610 --> 06:58.170 by going to key as in the key frame itself and handle typing you can see the shortcut key. 06:58.170 --> 07:00.650 Just like that Bezier curve is V. 07:00.930 --> 07:08.220 And if I set it to a vector it will become straight it will tend to carry on rather than doing anything 07:08.220 --> 07:08.790 else. 07:08.790 --> 07:11.230 We can see it's actually changed the motion a little. 07:11.280 --> 07:13.770 And going to go to the beginning one and also hit V. 07:13.770 --> 07:15.160 Instead it is a vector. 07:15.210 --> 07:20.880 In fact in this case because I want them all to be vectors and then a select everything hit v m vector. 07:21.060 --> 07:26.280 There we go is moving along and select the other square and do exactly the same. 07:26.280 --> 07:33.250 Some GLA select all and hit V and vector then they're just linearly moving between the two places. 07:33.430 --> 07:34.950 Okay so now we've done that. 07:34.950 --> 07:40.620 The next thing we need to do is make this toggle switch here where it says whether it's animated or 07:40.620 --> 07:42.790 not because of we turn it off. 07:42.870 --> 07:45.270 It behaves with the physics engine and was it's on. 07:45.270 --> 07:48.900 It just follows whatever path we've had set for it. 07:49.080 --> 07:52.260 So I'm going to go back to the timeline view. 07:52.350 --> 07:59.250 A bit less cluttered and what we need to do here is go to the beginning frame and where it says animated. 07:59.250 --> 08:04.650 I'm going to press I over the top of that and we can see it's gone yellow and will select the other 08:04.650 --> 08:07.190 Q And press I so it's animated. 08:07.200 --> 08:13.350 And now I just need to work out which cube is which some scanner play for the animation so this is the 08:13.350 --> 08:17.130 one that reaches there first and it's the one we've got selected. 08:17.130 --> 08:24.350 And so at frame 15 as it reaches there we can see it frame 15. 08:24.390 --> 08:27.080 It literally stops at its final resting place. 08:27.240 --> 08:33.810 But at that point we can actually turn off animation song and change it so that we've toggled animated 08:34.020 --> 08:36.020 off and hit the Iki. 08:36.870 --> 08:42.560 And what we should find now is when we play the animation it will remember its velocity an arc away. 08:42.600 --> 08:43.320 Excellent. 08:43.320 --> 08:49.440 Now this other one is going to is different place which is fair enough but those are going to the same 08:49.440 --> 08:51.140 place but it's getting there at a different speed. 08:51.140 --> 08:56.730 So we should see a difference between these two in terms of how high they go and how far they go when 08:56.730 --> 08:57.930 they hit the ground. 08:57.930 --> 09:03.760 So let's go ahead and it's at frame 30 I believe if I selected so I can see the little yellow blob brain 09:03.840 --> 09:05.460 thring 30 that's fine. 09:05.610 --> 09:11.170 And that toggle animated and press the key to keep that in. 09:11.300 --> 09:15.020 Now when I make the animation itself just a little bit longer. 09:15.120 --> 09:17.190 And let's see what happens when we play that. 09:17.190 --> 09:20.470 So let's go to it and a. 09:21.400 --> 09:25.480 And let the animation start it fresh rather than waiting it to go. 09:25.480 --> 09:31.030 So this one's got a lot more initial velocity than this one so goes further even though they go to the 09:31.030 --> 09:31.810 same point. 09:31.870 --> 09:36.970 So it's remembering where it was before and we can make that even more extreme. 09:36.970 --> 09:40.640 We can go back so this one that's going further go ensue. 09:40.660 --> 09:47.210 The graph Ed again where we've had this before and I'm going to use border selects like we've done 3D 09:47.290 --> 09:51.840 Ed and select those three they're using the geeky amulets you going to move it back. 09:51.880 --> 09:55.940 So this is going to make it move a lot lot faster because it's going to get to that. 09:55.940 --> 10:00.390 Oh I wasn't planning on it going that fast. 10:00.400 --> 10:02.360 There you go it's flying away. 10:02.420 --> 10:03.150 So. 10:03.220 --> 10:04.690 Wow okay. 10:04.990 --> 10:07.850 So let's maybe move that down to 10. 10:08.630 --> 10:12.390 Which is still significantly faster than 15. 10:12.500 --> 10:14.110 So that's drop it up a little. 10:14.120 --> 10:14.930 And there we go. 10:14.930 --> 10:19.730 So that just shows you though go into the same position but completely different times and they go a 10:19.730 --> 10:23.680 lot further or can cango a lot further they're brilliant. 10:23.870 --> 10:25.860 Okay so we've learned a little bit there. 10:25.940 --> 10:31.370 And if these were to come into contact with any other bodies that have physics applied they're going 10:31.370 --> 10:37.820 to interact with them which is really really useful because that's going to be a good bit of the challenge 10:37.820 --> 10:38.560 for you. 10:39.790 --> 10:46.660 Okay I'd like you to go and throw a primitive at the wall that we've created so annamay any primitive 10:46.660 --> 10:49.070 you light towards the wall itself. 10:49.240 --> 10:56.130 Switch the physics engine before impact and let the physics engine just do the rest and see what happens. 10:56.140 --> 10:58.770 Now do remember to experiment and have fun. 10:58.780 --> 11:01.300 I certainly have when I've been trying this out. 11:01.300 --> 11:05.880 Don't be put off if you throw something at the wall it doesn't go through it. 11:05.960 --> 11:08.940 Think why isn't it going through that wall. 11:08.940 --> 11:15.100 What would what would make it go through the wall would one make it knock the wall over a bit better. 11:15.100 --> 11:16.060 Does it need to be heavier. 11:16.060 --> 11:17.690 Does it need to be moving faster. 11:17.710 --> 11:20.610 These two things are very important. 11:20.620 --> 11:22.320 I'm sure you'll figure it out. 11:22.510 --> 11:24.830 But now is time to pause the video. 11:24.850 --> 11:27.580 Have some fun and give it a go. 11:30.420 --> 11:31.950 Okay guys welcome back. 11:31.950 --> 11:34.330 Let's go through a primitive at the wall. 11:35.510 --> 11:41.360 Okay so we've opened up a V wall here that we've been working on and I need a place something to go 11:41.360 --> 11:47.450 and impact it's all going to go over here and add ourselves all lots of choices of primitives which 11:47.450 --> 11:52.250 one shall I pick a cone see if it can force its way through the wall. 11:52.290 --> 11:53.790 I'm going to rotate it. 11:53.900 --> 11:56.760 I think 90 degrees on the x axis Yeah. 11:57.070 --> 11:58.710 And I'm going to lift it up. 11:58.730 --> 12:03.270 Ever since flying business off the ground is of five blending units Six okay. 12:03.310 --> 12:04.150 That should be fine. 12:04.160 --> 12:06.980 I'm just going to literally fire it straight. 12:07.610 --> 12:10.240 Just going to flip around from one side to the other. 12:10.460 --> 12:14.070 So it's going to impact slot slots there on the wall. 12:14.360 --> 12:19.290 So I'm going to move it forward ever so slightly an up ever so slightly. 12:19.430 --> 12:21.640 But let's key in its current position. 12:21.640 --> 12:24.390 First of all so let's go to frame zero. 12:24.530 --> 12:29.570 Let's go to the beginning of the animation frame one in this case and key in its current location. 12:29.600 --> 12:30.310 Excellent. 12:30.500 --> 12:32.700 Let's go ahead and move it all. 12:32.720 --> 12:38.760 Let's go to frame 10 let's say and move it forward a couple of blender units and maybe up 1. 12:39.110 --> 12:39.620 Excellent. 12:39.620 --> 12:46.940 Let's keep that in and let's make sure that is running on a lesson the keys here or the the frame sorry 12:46.940 --> 12:51.260 to 50 in total just so it can loop quickly there's our wall. 12:51.380 --> 12:55.620 Let's play that and just make sure it's moving it is moving that's fine. 12:55.620 --> 12:57.350 We still got that brick falling off. 12:57.350 --> 13:00.910 Let's give it a rigid body then it's going to flock to the ground which is fine. 13:00.950 --> 13:03.110 We're going to tell it is animated. 13:03.850 --> 13:04.690 And it should move. 13:04.690 --> 13:05.120 Excellent. 13:05.140 --> 13:10.870 And we just need to tell it went to forget the animation now so let's go to the very beginning and say 13:11.560 --> 13:12.320 hey blender. 13:12.340 --> 13:18.770 This is animated so we've keyed that in and let's go to the end of the animation and key it. 13:18.790 --> 13:24.360 But this time with it toggled off okay here's the moment of truth. 13:24.490 --> 13:27.130 Let's fire that's at the wall. 13:27.330 --> 13:28.370 Oh no. 13:28.440 --> 13:28.940 What. 13:29.070 --> 13:30.300 What's a flop. 13:30.340 --> 13:36.150 Okay so this is relatively straightforward to fix because we just need to move the two closer together 13:36.190 --> 13:38.700 until we get the desired results or the switch to the graph. 13:38.690 --> 13:45.030 Ed I'm going to make all of those of vector like we've done before and I'm just going to use and could 13:45.100 --> 13:49.360 select everything in using border so let's build a make this bigger so I can select things than with 13:49.360 --> 13:55.030 select those nodes there and literally just shift them all back at once. 13:55.030 --> 13:58.360 So I try that again I mis clicked on it. 13:58.360 --> 13:59.530 There we go. 13:59.890 --> 14:04.670 Okay so we got those go g and just move them back slightly. 14:05.460 --> 14:09.030 I need a lock these to an axis it's the x axis here. 14:09.110 --> 14:13.370 I'm going to make its five frames and play that and see what happens. 14:13.610 --> 14:21.110 How Okay so it's going to have to be less Let's move them all let's just do one frame and see what happens. 14:21.320 --> 14:28.990 I've gone too far back haven't I solist just undo that G x and go back to frame. 14:29.360 --> 14:30.080 That's the right one. 14:30.080 --> 14:31.610 Let's see if that works. 14:32.380 --> 14:36.910 Okay so that's not actually working that's all doing the desired result so the other thing we can do 14:36.910 --> 14:38.910 here is just get it to move a bit further. 14:38.920 --> 14:46.510 In that tight time frame itself so this time let's go back to the time line itself will stop it from 14:46.510 --> 14:52.600 running Let's go to that place where we keyed in the movement which is frame 10 but instead of it having 14:52.600 --> 14:58.060 this position let's literally just shift it further forward and key in that new position. 14:58.060 --> 14:58.710 Now was there. 14:58.720 --> 15:03.940 Wish the would be some sort of active thing to say that you've keep that in or might come up in the 15:03.940 --> 15:08.780 console that is possible in all of this junk up here. 15:08.970 --> 15:10.270 But I don't think it is. 15:10.270 --> 15:11.240 By the looks of it. 15:11.320 --> 15:12.760 So no not there. 15:12.760 --> 15:15.790 Let's see if we can run this animation. 15:15.830 --> 15:19.330 Haha and it hits the wall and does almost nothing. 15:19.330 --> 15:20.140 How about that. 15:20.320 --> 15:22.060 So why is it doing almost nothing. 15:22.060 --> 15:27.370 Well it weighs a kilo and the what the wall weighs a lot lot more. 15:27.670 --> 15:32.730 So let's make it heavier let's make it 50 kg and see what happens then. 15:33.470 --> 15:34.310 Excellent. 15:34.310 --> 15:36.590 So that's bust the hole straight through the wall. 15:36.590 --> 15:40.780 Let's make it five tons that's make it five thousand kilos to see what happens. 15:40.970 --> 15:42.510 So there we go. 15:42.590 --> 15:47.840 Not that much different actually it seems to be busting through the wall before doing anything else 15:47.940 --> 15:51.080 X and suddenly at 50 that seems to have a good effect. 15:51.160 --> 15:52.810 Then we go to the camera view here. 15:52.830 --> 15:58.280 Let's make my 3-d windage the little bit on the bigger side so see what's going on. 15:58.290 --> 16:03.370 And in fact in this case and on the move the camera out that's in completely the wrong place. 16:03.370 --> 16:10.220 Any way to capture anything cool and rotate it around and we've got all of this brick work flying out 16:10.250 --> 16:12.530 perfect that looks brilliant. 16:12.530 --> 16:14.000 How did you guys get on. 16:14.000 --> 16:20.200 Did you disintegrate your wall in a similar manner to me or did you come up with something more inventive. 16:20.240 --> 16:26.150 Please share your work in the discussions over on the forum and I will see you guys in the next lecture.