WEBVTT 00:00.180 --> 00:02.850 Welcome to non plane geometry. 00:03.150 --> 00:09.380 In this video we're going to understand that non plane geometry only happens with quads and guns. 00:09.390 --> 00:15.400 By definition a triangle is always playing now one explain a bit more of that in a moment. 00:15.420 --> 00:22.680 It is important to realize that rendering and exporting always absolutely always convert your geometry 00:22.680 --> 00:24.220 into triangles. 00:24.240 --> 00:26.550 You do lose control over the rendering. 00:26.550 --> 00:35.070 If you don't have a plain air surface because you're leaving it up to the renderer to sort out how to 00:35.460 --> 00:36.470 use your training wheels. 00:36.480 --> 00:40.030 Essentially you can't always see this in the 3D windows. 00:40.020 --> 00:45.120 He might not realize it has happened and will show you a couple of examples where we go on to make the 00:45.120 --> 00:46.810 queen's crown. 00:47.100 --> 00:48.840 How that can disturb us. 00:49.020 --> 00:54.780 And finally it does make a huge difference with flat models and flat shading which is exactly what we're 00:54.780 --> 00:56.070 working on at the moment. 00:56.280 --> 01:04.500 All of our model is in fact flat surfaces and later on when we make our lamp in the next section there's 01:04.500 --> 01:07.960 a lot of flat surface isn't that simple to make sure that they are plainer. 01:07.980 --> 01:10.870 Otherwise they will look odd during rendering. 01:11.340 --> 01:16.560 Now triangles in any guns if your model comes to a point at any point. 01:16.560 --> 01:22.440 You might need a triangle we're going to try to avoid England's where possible although when you start 01:22.440 --> 01:28.500 subdividing your surfaces you do you're likely to create an end gone elsewhere. 01:28.500 --> 01:30.310 That's something that will happen. 01:30.380 --> 01:35.880 Now of course you don't have to worry too much about that providing you feel or you know that you're 01:35.880 --> 01:38.710 in control of that bit of geometry. 01:38.760 --> 01:45.480 It is important to know that you will break loops when doing this edge loops and face loops will be 01:45.480 --> 01:50.460 broken the moment you do this and you want to keep those edge in face loops to enable you to edit and 01:50.460 --> 01:54.300 deform and control your model accurately wherever possible. 01:54.300 --> 01:58.370 Now this is a chessboard so not going to worry too much about defamation. 01:58.450 --> 02:03.800 So over in a default blender file we have the cube in front of us. 02:03.840 --> 02:10.810 Now let's work with that cube as it's a 3D objects that we can manipulate and see the effect. 02:10.890 --> 02:16.380 First of all if you're not already and do make sure you're on some flat shading you can do that over 02:16.380 --> 02:19.560 in the tool shelf itself so well flat. 02:19.560 --> 02:20.360 Excellent. 02:20.370 --> 02:24.030 I'm also just going to hide the outline and the properties windows over here. 02:24.060 --> 02:29.670 I'm just going to get rid of those and turn off the tall shelf whilst just duplicate the current window 02:29.670 --> 02:30.510 that we've got. 02:30.510 --> 02:31.530 Try that again. 02:31.530 --> 02:32.580 Brilliant. 02:32.840 --> 02:38.550 And I'm going to set one of these windows to a permanent rendered mode on the viewport shading and that 02:38.550 --> 02:42.860 means any changes we make over here we'll see over here as well. 02:42.870 --> 02:47.910 And I'm going to zoom in as we're going to play with the top of this cube so this zooming over here 02:47.910 --> 02:48.640 as well. 02:48.750 --> 02:55.860 Go into edit mode and make sure and virtex Select just select one of them and pull it up ever so slightly 02:55.890 --> 02:56.580 or push it down. 02:56.580 --> 02:57.470 It's up to you. 02:57.710 --> 03:04.980 Now we see that even though on the 3D view itself it looks like that's a relatively smooth one. 03:05.010 --> 03:07.650 I don't say the word smooth but a flat surface. 03:07.650 --> 03:13.600 Moving up there we can see that when blender decides to render it we get this horrible line across here. 03:13.620 --> 03:15.030 Not what we want now. 03:15.090 --> 03:17.150 We are dealing with. 03:18.020 --> 03:22.100 Flat shading here and we're dealing with flat surfaces. 03:22.100 --> 03:28.550 Now that means that any thing that is non plainer and we've made that the top of this cube was plainer 03:28.730 --> 03:33.930 until we moved one of its vertices out and that's made it non plainer. 03:34.010 --> 03:41.270 And it's this is the way that blender is decided to muck around with our model and make it make it into 03:41.270 --> 03:44.430 a plain the surface search to render it so split as it does. 03:44.430 --> 03:47.510 Anyway it's split this in two triangles. 03:48.140 --> 03:51.110 And that is what we mean by losing control. 03:51.110 --> 03:53.420 I've got no control how that split up. 03:53.620 --> 03:57.090 If I wanted to have this corner higher than the other. 03:57.170 --> 04:02.550 The best thing to do would be to add further geometry so that it's plainer and also does that. 04:02.750 --> 04:10.730 If it's a flat model when we push it back down into its neutral position it once again is plainer and 04:10.730 --> 04:16.940 we can see that over in the rendering we pull that out there we will see that this edge is now the problem 04:16.940 --> 04:17.650 edge. 04:17.740 --> 04:25.340 Now if we are really extreme with this so let's lift up really high you get this type of effect going 04:25.340 --> 04:25.570 on. 04:25.610 --> 04:32.910 So from the side in the render it looks like it comes down and then it moves off almost there not quite 04:32.910 --> 04:39.780 a right angle some of it might be 60 degrees or so but in our model itself it looks absolutely fine. 04:39.950 --> 04:45.860 So you can see that if you weren't very careful when constructing your model you'd be over here working 04:45.860 --> 04:51.710 away not being very lean not taking it to the rended section so this would be an ideal workflow. 04:51.710 --> 04:57.380 When you're modelling you're not sure if you're gonna make a non-plan the surface you can see it in 04:57.380 --> 05:00.030 life that that is in fact not. 05:00.950 --> 05:03.850 What we think we're going to get over in this view. 05:05.350 --> 05:09.040 So let's look at some of these solutions in more detail. 05:09.400 --> 05:15.160 Okay so the solutions to this non plainer issue that we're going to have with our flat shaded models 05:15.520 --> 05:17.420 or anything with a flat surface. 05:17.500 --> 05:24.250 Now good mesh topology from the beginning always helps with whatever you're doing and also being lean 05:24.280 --> 05:29.680 and checking your model through as we have been with the cube you've got a rendered view straight there 05:29.680 --> 05:36.160 so you can spot any issues as they happen rather than having to remodel later on which is very easy 05:36.160 --> 05:40.780 to fall into the trap get in there you're modelling away and all of a sudden find that you've made a 05:40.780 --> 05:44.310 big mistake for the last half hour and you've got to start again. 05:44.710 --> 05:50.350 Finally we've got these two options here there are a few more as well but these are the two main ones 05:50.530 --> 05:56.690 you can turn on mesh analysis and that will highlight a surface in air by default bright blue. 05:56.800 --> 06:05.050 If it's not plain and I'll show you how to adjust that in a few moments if we do a scale along the normal 06:05.110 --> 06:10.420 of a face it's self to zero that will flatten the face itself. 06:10.430 --> 06:18.760 Unfortunately that has the side effect sometimes of making other connected faces or so non plainer. 06:18.760 --> 06:20.790 So you can end up in a right pickle. 06:20.940 --> 06:27.340 But again this only matters if it makes an impact further down the line. 06:27.340 --> 06:31.570 So it's worthwhile bearing in mind we don't want the tail wagging the dog. 06:31.630 --> 06:38.260 If you are happy with the look of your model at this stage that's absolutely fine we're not going to 06:38.260 --> 06:39.640 be deforming. 06:39.640 --> 06:44.470 We're not going to be mucking around too much with the underlying geometry. 06:44.470 --> 06:50.940 So let's go have a look at meche analysis and manually making a face plainer again over in blender. 06:52.070 --> 06:54.080 So let's turn on our. 06:54.260 --> 06:58.740 Not tall shelf sorry our properties pain on this one here and every scroll down. 06:59.510 --> 07:02.170 We've got mesh analysis towards the bottom. 07:03.630 --> 07:05.840 Popping a tic in that it looks a bit funny. 07:05.850 --> 07:11.820 I know but we can just hear the type from overhang which is good. 07:11.820 --> 07:19.080 If you're working with 3-d printing to distortion and these values here we won't the this is the minimum 07:19.110 --> 07:25.170 angle to display and the maximum angled display which is great if you've got certain angles you need 07:25.170 --> 07:26.340 to adhere to as well. 07:26.340 --> 07:31.100 Again with 3-d printing or other considerations perhaps an engineering consideration. 07:31.170 --> 07:33.870 But in this case we want the maximum one to actually be zero. 07:33.870 --> 07:34.820 We don't care. 07:34.830 --> 07:37.840 We just want to know if it's not a plane. 07:38.340 --> 07:43.950 And then finally this one here where you can lower it down to one degree but that's as you can see if 07:43.950 --> 07:50.320 we move this edge down at some point it will be less than 1 degree but still non plane. 07:51.300 --> 07:55.250 So we can I don't know whether we'll see this in the rended view or not. 07:55.560 --> 07:58.280 If we made the Q much bigger I'm sure we would. 07:58.410 --> 08:03.960 But that's not exactly plainer at the moment and we can tell that because our z value needs to be won 08:03.960 --> 08:07.450 in order for it to be a true plane surface. 08:07.590 --> 08:13.020 What you can do of course is in the here go type nought point nought not one or something silly like 08:13.020 --> 08:14.040 that tiny. 08:14.100 --> 08:20.190 That means any movement whatsoever will make this face bright blue and you tell instantly that it's 08:20.190 --> 08:21.290 not the plane. 08:21.780 --> 08:27.390 The other option is to select the face making sure that you're scaling. 08:28.680 --> 08:33.050 In the Z axis of the face itself and scale it to zero. 08:35.210 --> 08:35.710 Okay. 08:35.790 --> 08:41.960 Our run through that once more so assuming we've made a non a surface like that you'd select the face 08:41.960 --> 08:46.870 itself you'd say let me press Z twice. 08:46.940 --> 08:54.490 So once is for the global normal and then Z again is for the local normal. 08:54.500 --> 08:56.910 And we can see it change in the lower left. 08:57.500 --> 09:02.140 And then if you set it to zero it will flatten the face out again. 09:02.890 --> 09:08.320 So let's go and have a look at this in action inaction over on the Queen that we're currently modelling 09:08.920 --> 09:15.820 so in file open recent and I'm going to go to my low poly queen So let's turn on meche analysis here 09:15.850 --> 09:20.370 and see if we've got any non accords at the moment so many analysis on. 09:21.170 --> 09:22.060 Distortion. 09:22.100 --> 09:23.750 I'm just going to set it at one degree. 09:23.760 --> 09:27.390 Don't need any lower than that and maximum of zero. 09:27.590 --> 09:28.230 Okay. 09:28.280 --> 09:32.040 So looking around Lot model it's looking pretty clean at the moment. 09:32.040 --> 09:38.090 Let's just test to make sure it is working so in edit mode and selectiveness vertex Sorry move it about 09:38.090 --> 09:40.880 and we can see it's these triangles at the top. 09:40.880 --> 09:46.540 Notice they're not going blue because a triangle by definition can only be plainer. 09:46.820 --> 09:48.640 The quads however are not. 09:48.660 --> 09:54.360 And if if I'm wobbling about you can see they're going towards being plainer and away all the time. 09:54.380 --> 09:58.430 I'm just going to escape out of that since I don't want to make it non plainer. 09:58.500 --> 10:01.210 Now the top of our Queen. 10:01.220 --> 10:06.800 If we want it to be pointy we've got a couple of options that we're going to have to do because it's 10:06.800 --> 10:07.360 pointy. 10:07.360 --> 10:11.650 Essentially you're going to have to end it as a set of triangles. 10:11.960 --> 10:18.980 Now I certainly want the outsides to remain more quod like then the inside I'm happy at being triangles 10:18.980 --> 10:19.450 here. 10:19.490 --> 10:27.890 This is an artistic decision and alternative way of doing that would also be to add some tiny quads 10:27.890 --> 10:31.310 to the very top and then make a kind of funky crown. 10:31.310 --> 10:37.700 Now we are going to have to do some subdivision at some point or some geometry reconstruction in order 10:37.700 --> 10:41.660 to keep the style that were going for at the moment. 10:41.690 --> 10:43.210 But again this is artistic style. 10:43.220 --> 10:49.580 You may enjoy or indeed like the aesthetic appeal of it doing some triangulation So there are no hard 10:49.580 --> 10:56.000 rules here but what I would like to keep throughout our model I'm going to turn the mission arses off 10:56.000 --> 10:56.600 again. 10:56.600 --> 11:04.240 I would like to keep this on octagonal feel around all of our pieces with the Especially on the outside. 11:04.240 --> 11:10.220 I don't mind if the inside ends up a bit triangulated in order to make this top so we are going to include 11:10.220 --> 11:14.290 triangles there already at the top there anyway and as well as triangles. 11:14.330 --> 11:18.100 When we do some subdivision I'm sure we're going to end up with a couple of guns. 11:18.260 --> 11:25.100 Now those won't matter unless they stop deform in the object all they cause a rendering problem later 11:25.100 --> 11:25.440 on. 11:25.610 --> 11:32.630 As long as the meshed apology is good and we end up with the flat shading that was necessary to create 11:32.660 --> 11:35.870 this model that's absolutely fine. 11:35.870 --> 11:38.260 So let's hop on to the next picture.