WEBVTT 1 00:00:00.000 --> 00:00:02.466 Welcome to Merging Vertices in 2 00:00:02.466 --> 00:00:06.466 Blender! In this video we'll explore 3 00:00:06.466 --> 00:00:10.466 Wireframe Mode, how to merge two vertices 4 00:00:10.466 --> 00:00:14.466 into one vertex, why you would want to do 5 00:00:14.466 --> 00:00:18.466 this, and how to control the sensitivity of 6 00:00:18.466 --> 00:00:22.433 that merge. So let's hop over into Blender! 7 00:00:22.433 --> 00:00:26.433 In front of us here we have the periscope we've been working on. 8 00:00:26.433 --> 00:00:30.433 I'd like you to look at the Info Header, right at the very top of your 9 00:00:30.433 --> 00:00:34.433 Blender window, and cast your eyes over to the right-hand side 10 00:00:34.433 --> 00:00:38.433 where we can see it says Blender version 2.74. Then, it gives 11 00:00:38.433 --> 00:00:42.433 us Verts and that says 20. We also can see 16 Faces. 12 00:00:42.433 --> 00:00:46.433 So we're going to use that information, coming up, so we can 13 00:00:46.433 --> 00:00:50.433 keep that as our reference. So let's hop over 14 00:00:50.433 --> 00:00:54.433 into Edit Mode and make sure Vertex 15 00:00:54.433 --> 00:00:58.433 Select is selected and let's just 16 00:00:58.433 --> 00:01:02.433 scroll around and count our vertices. I count 12. If you count 17 00:01:02.433 --> 00:01:06.433 all of the vertices that are here, 1, 2, 3, 4, 5, 18 00:01:06.433 --> 00:01:10.433 6, 7, 8, 9, 10, 11, 12. So what's going on? 19 00:01:10.433 --> 00:01:14.433 Why are there 20 vertices and I'm only seeing 20 00:01:14.433 --> 00:01:18.433 12? Well even though we've merged this, so it's one mesh, 21 00:01:18.433 --> 00:01:22.433 it's remembered that the vertex that makes up this 22 00:01:22.433 --> 00:01:26.433 wedge is different from the one that makes up the cube, even though they exist in exactly 23 00:01:26.433 --> 00:01:30.433 the same point in 3D space. So how do we 24 00:01:30.433 --> 00:01:34.433 go about selecting the other one, because at the moment, 25 00:01:34.433 --> 00:01:38.433 it doesn't matter where I click around this area, I can zoom in, 26 00:01:38.433 --> 00:01:42.433 I just can't select it. Well not only does Wireframe 27 00:01:42.433 --> 00:01:46.433 Mode, which is down here, so near Edit Mode 28 00:01:46.433 --> 00:01:50.433 on the 3D Header we have our Viewport 29 00:01:50.433 --> 00:01:54.433 Shading options. We can select Wireframe, we can also use the Z key. 30 00:01:54.433 --> 00:01:58.433 So you may have told it, if you've ever tried to undo something 31 00:01:58.433 --> 00:02:02.433 and miss-hit the keys. Now we're in 32 00:02:02.433 --> 00:02:06.433 Wireframe mode. If you select, can you see it toggles 33 00:02:06.433 --> 00:02:10.433 between the vertex on the wedge, and we can see that with the orange lines, 34 00:02:10.433 --> 00:02:14.433 and the vertex of the cube. Now, ordinarily there'll be another 35 00:02:14.433 --> 00:02:18.433 two lines coming out on these two edges here, 36 00:02:18.433 --> 00:02:20.233 however, they are covered up. 37 00:02:20.233 --> 00:02:23.200 So how do we merge these two together 38 00:02:23.200 --> 00:02:27.200 and why would we want to do that? Well let's cover the why first. So I'm 39 00:02:27.200 --> 00:02:31.200 going to hop back onto solid shading, and I'm going to go to Edge 40 00:02:31.200 --> 00:02:35.200 Select. And remember that whenever you select Vertex 41 00:02:35.200 --> 00:02:39.200 Select, Edge Select, or Face Select, what it's essentially doing 42 00:02:39.200 --> 00:02:43.200 is selecting the vertices that make up that face 43 00:02:43.200 --> 00:02:47.200 or that edge, or indeed, when it's just a Vertex Select just the vertex itself. 44 00:02:47.200 --> 00:02:49.833 So if we select this front edge here, 45 00:02:49.833 --> 00:02:51.133 it's likely to have selected 46 00:02:51.133 --> 00:02:55.033 that wedge rather than the cube. And if we drag that forward, 47 00:02:55.033 --> 00:02:59.033 it has excellent, we can see that's made more of a 48 00:02:59.033 --> 00:03:03.033 house shape. So, in this case, we may not want 49 00:03:03.033 --> 00:03:07.033 to merge these together, because now they're actually in two separate 50 00:03:07.033 --> 00:03:11.033 places. However, if we wanted 51 00:03:11.033 --> 00:03:15.033 to move the whole lot at once, thus creating a completely different 52 00:03:15.033 --> 00:03:19.033 shape, what we'd want to do is merge these vertices 53 00:03:19.033 --> 00:03:23.033 with these ones here. So if I Shift and click that 54 00:03:23.033 --> 00:03:27.033 edge inside, as well, and go over to the 55 00:03:27.033 --> 00:03:31.033 left-hand side onto the Tool Shelf and scroll all the way down, 56 00:03:31.033 --> 00:03:35.033 there's an option to Remove Doubles. 57 00:03:35.033 --> 00:03:39.033 Now, when you click on Remove Doubles nothing will happen, 58 00:03:39.033 --> 00:03:43.033 and that's because the four vertices we have selected 59 00:03:43.033 --> 00:03:47.033 are very very far from one another. They're 60 00:03:47.033 --> 00:03:51.033 0.0001 Blender units. So we're going to 61 00:03:51.033 --> 00:03:55.033 have to increase this number, down on the lower-left, 62 00:03:55.033 --> 00:03:59.033 until they snap together. And there we go, they have now snapped together! 63 00:03:59.033 --> 00:04:03.033 Now we can see, up there, that it's removed two vertices, because we're 64 00:04:03.033 --> 00:04:07.033 now on 2, which is the 2 either side of this edge, out of 65 00:04:07.033 --> 00:04:11.033 18 rather than 20. That's brilliant! 66 00:04:11.033 --> 00:04:15.033 Let's do another example down at the bottom! 67 00:04:15.033 --> 00:04:19.033 We're going to go to Vertex Select, select this one here, 68 00:04:19.033 --> 00:04:23.033 and going to go into Wireframe, so I can select the other one 69 00:04:23.033 --> 00:04:27.033 that's in exactly the same place. This time when I hit Remove 70 00:04:27.033 --> 00:04:31.033 Doubles, because the Merge Distance is so high it's definitely going to work, but 71 00:04:31.033 --> 00:04:35.033 because they are in exactly the same place in space, 72 00:04:35.033 --> 00:04:39.033 it would work anyway. And that's removed another vertex, and now 73 00:04:39.033 --> 00:04:43.033 we shall see that the amount has also dropped down, now to 17. 74 00:04:43.033 --> 00:04:47.033 So I feel a challenge coming on! Are you guys ready?! 75 00:04:47.900 --> 00:04:51.766 I'd like you to make your periscope the minimum number 76 00:04:51.766 --> 00:04:55.766 of vertices that it can possibly be. Go ahead and 77 00:04:55.766 --> 00:04:59.566 try that now! 78 00:04:59.566 --> 00:05:03.400 Welcome back! Let's go and make our periscope have the 79 00:05:03.400 --> 00:05:07.400 minimum number of vertices that it needs, in order to make the same shape. 80 00:05:07.400 --> 00:05:11.400 So I've got this bit of a squiffy thing going on here! 81 00:05:11.400 --> 00:05:15.400 Now if we lower the merge distance all the 82 00:05:15.400 --> 00:05:19.400 way down to 0.00001 and select our 83 00:05:19.400 --> 00:05:23.400 entire model and click on Remove Doubles, 84 00:05:23.400 --> 00:05:27.400 it will remove the extra 5 vertices, in this case, that I had, 85 00:05:27.400 --> 00:05:31.400 so now we have 12 out of 12. You could have 86 00:05:31.400 --> 00:05:35.400 gone around and done each one individually for more control, but 87 00:05:35.400 --> 00:05:39.400 in this case, because of the merge distance, I've lowered all the way back down 88 00:05:39.400 --> 00:05:43.400 to a very low number. It only merges the ones that are in 89 00:05:43.400 --> 00:05:47.400 exactly the same place in space. Now 90 00:05:47.400 --> 00:05:51.400 I've now got full control over the model, and I can move that roughly 91 00:05:51.400 --> 00:05:55.400 to where it was before. And, in fact, with the Median distance 92 00:05:55.400 --> 00:05:59.400 here with the Y, I can actually go in there and type -1, 93 00:05:59.400 --> 00:06:03.400 and that will probably straighten it up to where it was before. That looks 94 00:06:03.400 --> 00:06:07.400 pretty neat to me! Excellent! How did you guys 95 00:06:07.400 --> 00:06:11.400 get on?! Did you decide to select all of the 96 00:06:11.400 --> 00:06:15.400 vertices and then just Remove Doubles on the entire model, or did you go around 97 00:06:15.400 --> 00:06:19.400 one by one and take a bit more caution over it? Of course, 98 00:06:19.400 --> 00:06:23.400 if you had had a very high number, when you were 99 00:06:23.400 --> 00:06:27.400 merging, so we selected all and you clicked Remove Doubles, but this 100 00:06:27.400 --> 00:06:31.400 was something much much higher, perhaps earlier on, you could have ended up 101 00:06:31.400 --> 00:06:35.400 with a line or some sort of other shape going on. 102 00:06:35.400 --> 00:06:39.400 A kind of cool sort of fractal crystal going on there, but 103 00:06:39.400 --> 00:06:41.200 it's no longer our periscope. 104 00:06:41.200 --> 00:06:45.200 And in fact, if it was really really high, you would find that all of the 105 00:06:45.200 --> 00:06:49.200 vertices would merge to one point, and then, you would just have 106 00:06:49.200 --> 00:06:53.200 one vertex left in your model and that's not really 3D anymore. 107 00:06:53.200 --> 00:06:57.200 In fact, it's no dimension because it's just a point [Laughs] in space. But well, 108 00:06:57.200 --> 00:07:01.200 let's stop being silly, and let's drag that all the way back down to where it was before, 109 00:07:01.200 --> 00:07:03.300 so we've got our periscope back again. If you haven't 110 00:07:03.933 --> 00:07:07.933 done it already, I suggest you go to File, Save As. 111 00:07:07.933 --> 00:07:11.933 Name it something like Merging Vertices in Blender or whatever 112 00:07:11.933 --> 00:07:15.933 you want to call it yourself and save that file. As always, 113 00:07:15.933 --> 00:07:19.933 I would recommend saving as much as you can. 114 00:07:19.933 --> 00:07:23.933 I do like the versioning, you can use that as a 115 00:07:23.933 --> 00:07:27.933 fallback as well, as well as the system, or indeed Dropbox, but I do 116 00:07:27.933 --> 00:07:31.933 like having finite control over what I'm doing. So in this case, I've Saved 117 00:07:31.933 --> 00:07:35.933 As, and I've called it (Merging Vertices in Blender), for my own reference. 118 00:07:35.933 --> 00:07:39.933 Remember guys, please save! Once you've lost work, 119 00:07:39.933 --> 00:07:43.933 or messed it up beyond belief, it will be incredibly hard to get it back! 120 00:07:44.000 --> 00:07:46.900 OK guys, see you in the next lecture!