WEBVTT 1 00:00:00.000 --> 00:00:04.000 Welcome to Edge Loops and Loop Cut and 2 00:00:04.000 --> 00:00:08.000 Slide! So in this video, we're going to go through what 3 00:00:08.000 --> 00:00:12.000 edge loops are, how to select an edge loop, 4 00:00:12.000 --> 00:00:16.000 then we're going to move on to the power of a loop 5 00:00:16.000 --> 00:00:20.000 cut and show you how to control it's slide function, 6 00:00:20.000 --> 00:00:24.000 the loop cut and slide. So let's hop over into Blender! 7 00:00:24.000 --> 00:00:28.000 OK, so we've got our 8 00:00:28.000 --> 00:00:32.000 pyramid here. Now I want to demonstrate an edge loop 9 00:00:32.000 --> 00:00:36.000 for you. So if we've selected an edge... Let's just 10 00:00:36.000 --> 00:00:40.000 pick an edge down here. Oh, we need to be in Edge Select and Edit Mode, 11 00:00:40.000 --> 00:00:44.000 if you're not already. Ah, we've selected this edge here. And 12 00:00:44.000 --> 00:00:48.000 now an edge loop is just a continuous series of edges. So there's an edge here, 13 00:00:48.000 --> 00:00:52.000 an edge here, and then it disappears behind the model and it comes back again. So if we go to 14 00:00:52.000 --> 00:00:56.000 Mesh and go to Edges and then 15 00:00:56.000 --> 00:01:00.000 somewhere down here there's Edge Loops, 16 00:01:00.000 --> 00:01:04.000 and you can see it's selected that loop of edges. 17 00:01:04.000 --> 00:01:08.000 Now the shortcut, the keyboard shortcut for that 18 00:01:08.466 --> 00:01:10.666 is Alt. So if you're holding down 19 00:01:10.666 --> 00:01:14.666 Alt, when you click an edge 20 00:01:14.666 --> 00:01:18.666 like so, you will select the Edge Loop. 21 00:01:18.666 --> 00:01:22.666 Now, in this case, all of these go around in a loop. 22 00:01:22.666 --> 00:01:26.666 However, if we were to select this edge here, whilst holding it down, you 23 00:01:26.666 --> 00:01:30.666 can see it terminates at the top and, in fact, terminates at the bottom. 24 00:01:30.666 --> 00:01:34.666 And the reason for that is because these other two edges 25 00:01:34.666 --> 00:01:38.566 have come in and created what's known as a pole, 26 00:01:39.166 --> 00:01:43.166 where three or more edges join together. There is another exception, where 27 00:01:43.166 --> 00:01:47.166 you've got a quad, where if there was fourth line coming in, it would probably 28 00:01:47.166 --> 00:01:51.166 continue this edge loop all the way around our model. And 29 00:01:51.166 --> 00:01:55.166 the same happens with these top edges, if you try holding down Alt and 30 00:01:55.166 --> 00:01:59.166 clicking, you will find that they also don't go anywhere. 31 00:01:59.166 --> 00:02:03.166 So that is an edge loop and we can use that to 32 00:02:03.166 --> 00:02:07.166 select our edge loop, when we need to modify it. So let's 33 00:02:07.166 --> 00:02:10.466 try using a loop cut! 34 00:02:10.466 --> 00:02:13.366 Now the great thing about this is that 35 00:02:13.366 --> 00:02:17.366 you can literally cut up your geometry and create more. 36 00:02:17.366 --> 00:02:21.366 So if we hop over into face mode, you can see that there are 37 00:02:21.366 --> 00:02:25.366 only four faces around the top of this pyramid, and 38 00:02:25.366 --> 00:02:29.366 if we hold down the shortcut keys Control and 39 00:02:29.366 --> 00:02:33.366 R, at the same time, we end up with this pink thing 40 00:02:33.366 --> 00:02:37.366 appearing on the screen. This is how our model is going to be cut up. 41 00:02:37.366 --> 00:02:41.366 Now the way that it's deciding where to 42 00:02:41.366 --> 00:02:45.366 cut, as you can see if I go towards this top edge here 43 00:02:45.366 --> 00:02:49.366 on the pyramid it cuts around our model 44 00:02:49.366 --> 00:02:53.366 and the same over here. If we come towards this edge, it cuts 45 00:02:53.366 --> 00:02:57.366 around our model, and that would happen on all of them. 46 00:02:57.366 --> 00:03:01.366 By default, this is a proportional cut. 47 00:03:01.366 --> 00:03:05.366 By that I mean 0 is in the middle, so let's 48 00:03:05.366 --> 00:03:09.366 left-click once, and we can see towards the lower- 49 00:03:09.366 --> 00:03:13.366 left it says Edge Slide. So this is the slide part of 50 00:03:13.366 --> 00:03:17.366 our cut, it goes from 1 all the way across to 51 00:03:17.366 --> 00:03:21.366 -1. So it's a proportional cut and 0 being bang in 52 00:03:21.366 --> 00:03:25.366 the middle. So because I've moved it, which you're going to do all the time, 53 00:03:25.366 --> 00:03:29.366 I'm just going to press 0 before I 54 00:03:29.366 --> 00:03:33.366 finalize that cut. Now if we hop back over into 55 00:03:33.366 --> 00:03:37.366 face mode, we can see it's divided those faces. 56 00:03:39.866 --> 00:03:43.866 Alright, so I've just opened up a brand new Blender file, just to show you something 57 00:03:43.866 --> 00:03:47.866 with a loop cut and slide, that I don't want to show you on the pyramid, because it's a bit too 58 00:03:47.866 --> 00:03:51.866 complicated or complex, sorry, to show you on 59 00:03:51.866 --> 00:03:55.866 that geometry. However, a nice simple cube, it's brilliant on. 60 00:03:55.866 --> 00:03:59.866 So I'm going to hop into Edit Mode really quick, make sure Edge Select 61 00:03:59.866 --> 00:04:03.866 is on, and I'm just going to make this shape here 62 00:04:03.866 --> 00:04:07.866 a bit more like the pyramid that we've been working on, and I only really care about 63 00:04:07.866 --> 00:04:11.866 this front face. So when you're doing a loop cut and slide, when 64 00:04:11.866 --> 00:04:15.866 the faces aren't already parallel at the top of this 65 00:04:15.866 --> 00:04:19.866 square, let's go and put a loop cut in now. 66 00:04:19.866 --> 00:04:23.866 So Control and R and then left-click, and then it enables 67 00:04:23.866 --> 00:04:27.866 this slide. And as I mentioned before, it is a proportional 68 00:04:27.866 --> 00:04:31.866 slide, and you can see it goes more and more 69 00:04:31.866 --> 00:04:35.866 at an angle, as it goes towards the left or the right. Now 70 00:04:35.866 --> 00:04:39.866 in the middle,um, it's 0, and on 71 00:04:39.866 --> 00:04:43.866 the left it's -1 and on the right it's 1, and we can 72 00:04:43.866 --> 00:04:47.866 see that edge slide in the lower left-hand side. 73 00:04:47.866 --> 00:04:51.866 It's going all the way, as I say, down to -1 and up to 1. 74 00:04:51.866 --> 00:04:55.866 In this case, I want to put it bang in the middle, so I'm going to hit the 0 key 75 00:04:55.866 --> 00:04:59.866 and just press Enter, and that fixes it in that location. Now one 76 00:04:59.866 --> 00:05:03.866 of the great things, when you're cutting up any mode with the Loop 77 00:05:03.866 --> 00:05:07.866 Cut is, you can actually place geometry on top of one another. 78 00:05:07.866 --> 00:05:11.866 So if I go and create another loop cut now, with Control 79 00:05:11.866 --> 00:05:15.866 and R, and we can just see it there. If I move it 80 00:05:15.866 --> 00:05:19.866 across and bang it straight up against the previous 81 00:05:19.866 --> 00:05:23.866 cut and then select, well actually apply 82 00:05:23.866 --> 00:05:27.866 that change, there's extra geometry on top of 83 00:05:27.866 --> 00:05:31.866 one another, at the moment. Now I can use the 3D Manupulator 84 00:05:31.866 --> 00:05:35.866 now, just to pull that out, and we can see, if I switch on 85 00:05:35.866 --> 00:05:39.866 face mode that there are three separate faces. So it's great being able 86 00:05:39.866 --> 00:05:43.866 to put geometry on top of itself, without 87 00:05:43.866 --> 00:05:47.866 worrying about it too much. Now remember, if you've done this the model can 88 00:05:47.866 --> 00:05:51.866 become very messy, so make sure you do it with intent and 89 00:05:51.866 --> 00:05:55.866 do something with it immediately, rather than just leaving it, otherwise it's going to 90 00:05:55.866 --> 00:05:59.866 cause you confusion later on. One final thing to mention, 91 00:05:59.866 --> 00:06:03.866 if you're doing this type of thing and you've got Proportional 92 00:06:03.866 --> 00:06:07.866 Editing turned on. So the shortcut for that is O, so you 93 00:06:07.866 --> 00:06:11.866 might have hit O by accident or indeed enabled it 94 00:06:11.866 --> 00:06:15.866 down here. Now, one of the things you will notice when Proportional Editing 95 00:06:15.866 --> 00:06:19.866 is turned on, is if I do the same thing again 96 00:06:19.866 --> 00:06:23.866 and put one on top of the other and then try and 97 00:06:23.866 --> 00:06:27.866 move it, ah there's not an extra bit of 98 00:06:27.866 --> 00:06:31.866 there's no extra geometry created. And you also get this circle on the screen, 99 00:06:31.866 --> 00:06:35.866 so that's a good clue that you're in Proportional Editing mode, when you start moving 100 00:06:35.866 --> 00:06:39.866 things. We'll go through that actual tool later on, 101 00:06:40.000 --> 00:06:43.366 but just to make you aware at the moment, it's almost the same as if you've had 102 00:06:43.366 --> 00:06:47.366 merging your vertices turned on, when doing that 103 00:06:47.366 --> 00:06:51.366 thing there. So make sure you've not go Proportional Editing turned 104 00:06:51.366 --> 00:06:55.366 on, if you're doing this type of action, and you're going to need that 105 00:06:55.366 --> 00:06:57.166 in the challenge coming up! 106 00:06:57.933 --> 00:07:01.400 It's challenge time! I'd like you to create 107 00:07:01.400 --> 00:07:05.400 a ramp for our steps, using the Loop Cut and Slide 108 00:07:05.400 --> 00:07:09.400 feature. It just needs to be on one side of the pyramid for this 109 00:07:09.400 --> 00:07:13.400 exercise, and we're going to be creating the ramp needed 110 00:07:13.400 --> 00:07:14.900 for some stairs. 111 00:07:14.900 --> 00:07:18.900 And to give you an idea of the end result I'm going for, it's 112 00:07:18.900 --> 00:07:22.900 a parallel set of steps like this. It just makes creating the 113 00:07:22.900 --> 00:07:26.000 steps going up easier later on. 114 00:07:26.000 --> 00:07:28.600 Pause the video now and give that a go! 115 00:07:31.600 --> 00:07:35.600 Welcome back! How did you guys get on? Now, before we hop over 116 00:07:35.600 --> 00:07:39.600 into Blender, what I need to make sure is that you're not skipping ahead. I 117 00:07:39.600 --> 00:07:43.600 really must impress the importance of trying out these challenges yourself, 118 00:07:43.600 --> 00:07:47.600 and if you're not able to do it, put the owe-ness back on me, 119 00:07:47.600 --> 00:07:51.600 your instructor, your tutor. If you're having difficulties, 120 00:07:51.600 --> 00:07:55.600 if something wasn't clear enough for you to be able do this challenge, then I 121 00:07:55.600 --> 00:07:59.600 need to modify these videos to make sure it is very clear for you. 122 00:07:59.600 --> 00:08:03.600 So without further ado, let's hop straight on over 123 00:08:03.600 --> 00:08:05.066 into Blender! 124 00:08:05.200 --> 00:08:09.200 So we've already made one loop cut down the middle 125 00:08:09.200 --> 00:08:13.200 of our model and divided it in two. 126 00:08:13.200 --> 00:08:17.200 We need to make another one, so I'm just going to go 127 00:08:17.200 --> 00:08:21.200 Control and R and line it up there. 128 00:08:21.200 --> 00:08:25.200 And I'm just going to move the mouse, at this point, and I'm going to ram it up against this one 129 00:08:25.200 --> 00:08:29.200 and put those two edges literally on top of one another. 130 00:08:29.200 --> 00:08:33.200 Now once I've done that, I can now control 131 00:08:33.200 --> 00:08:37.200 where those edges are in our model. 132 00:08:37.200 --> 00:08:41.200 So I'm going to hold.. I'm going to press G and I'm just going to move it. If you moved 133 00:08:41.200 --> 00:08:45.200 it the wrong way, the model will go a funny color. And now 134 00:08:45.200 --> 00:08:49.200 I've moved this out, and I only want it moving in... 135 00:08:49.200 --> 00:08:53.200 I'm looking down here, towards the bottom-left, the y axis, I'm going to press y 136 00:08:53.200 --> 00:08:57.200 and that's locked it into this axis. Now, 137 00:08:57.200 --> 00:09:01.200 I want to move it, by the looks of it, by about 1 and 1/2. 138 00:09:01.200 --> 00:09:05.200 I'm going to type in 1.5 and press 139 00:09:05.200 --> 00:09:09.200 Enter. Now I can do the same thing with this 140 00:09:09.200 --> 00:09:13.200 edge loop, but I'm going to have to select the edge loop first. I'm going to hold down Alt 141 00:09:13.200 --> 00:09:17.200 and select it. Then, I'm going to grab it, 142 00:09:17.200 --> 00:09:21.200 moving it only in the Y axis, by 143 00:09:21.200 --> 00:09:25.200 1.5? No, - 1.5! 144 00:09:25.200 --> 00:09:29.200 So -1.5, 145 00:09:29.200 --> 00:09:33.200 there we go! So that's created some fixed points at the top 146 00:09:33.200 --> 00:09:37.200 and the bottom, that we can link up. And the final thing is to 147 00:09:37.200 --> 00:09:39.400 create our ramp, so I'm going to 148 00:09:40.233 --> 00:09:44.233 I'm going to select these bottom two vertices. 149 00:09:44.233 --> 00:09:48.233 I'm going to hold down Shift to select multiple vertices. I'm going 150 00:09:48.233 --> 00:09:52.233 to, still holding down Shift, I'm going to press these two vertices here, 151 00:09:52.233 --> 00:09:56.233 and then, I'm going to press the F key to 152 00:09:56.233 --> 00:10:00.233 generate a face. Now that face is inside our model. 153 00:10:00.233 --> 00:10:04.233 I'm going to now change the view to Wireframe, 154 00:10:04.233 --> 00:10:08.233 and that also has a shortcut key, which is Z. 155 00:10:08.233 --> 00:10:12.233 By pressing Z, when you've not got anything selected, moving, rotating, 156 00:10:12.233 --> 00:10:16.233 etc. it will in fact switch to Wireframe Mode. And we can see 157 00:10:16.233 --> 00:10:20.233 underneath, that ramp is ready for use. 158 00:10:20.233 --> 00:10:24.200 How did you guys get on? 159 00:10:24.433 --> 00:10:28.433 I will see you guys in the next lecture, where we're going to use that ramp 160 00:10:28.433 --> 00:10:32.433 as the base for our steps.