Join Shaun Bryant for an in-depth discussion in this video Using EXTRUDE to create 3D solids, part of AutoCAD: Tips & Tricks.
- [Instructor] We're now going to look at another AutoCAD tip and trick from lynda.com. We're going to have a look now at the extrude command in AutoCAD. Now extrude is a wonderful command because it transitions between 2D and 3D drafting. So we've got a new drawing open for you here. You can download that from your lynda.com exercise files to follow along with the video. Now you may recognize this if you've actually done the region command tip and trick in our recent tips and tricks on lynda.com, and what we've got here is an AutoCAD region if I hover over it there.
It's a region and it's on the layer region, and we've developed that region so that we can extrude it in a 3D environment to become a 3D solid. Right now it is a flat 2D region in a flat 2D drawing. So how do we move into a 3D environment and extrude our region to make it into a 3D solid? Well it's actually quite easy, and you don't have to move into 3D drafting. You can stay in your 2D settings in AutoCAD, no problem at all to do this.
So, let's have a look now at looking at this, so that we can actually see our region being extruded with a value to make it into a 3D solid. First thing we need to do is we need to look at either the view cube over here, which is in the top view right now on the view cube there; or we go over here and look at our view control which says top as well. So if I click on top there, there's all my different views available to me. Now all of these views here are also available on the view key.
So if I just hit escape there a moment and go over here, can you see if I hover over the view cube, I can hover over a corner. I can hover over the top view and watch the view cube when I go back the view control here and select Southwest isometric. Can you see the view cube changes in accordance with that view? If I went for something like the Southeast isometric, that flips it round. Just going to zoom out slightly, just so we can see our little region there that we've created. Let's just zoom and pan a little bit.
Now I'm not actually going to go into any 3D workspaces or anything at all. I'm just going to type the extrude command by typing the word extrude. It's as simple as that. There's the extrude command there on the suggestion menu. It now asks me to select basically the object I want to extrude. Now it has to be a closed profile. It could be a poly line. It could be a closed poly line. It could be a closed spline. In this case, it's my region I've got sitting in my red region. So if I select that now and then press enter to confirm that selection, I can now convert that to a 3D solid.
So there's my extrude. Can you see I'm extruding it upwards, and I've got the direct entry there on the dynamic input. So I'm going to put in there, let's say 500. So it's 500 units high, press enter. As if by magic, that is now a 3D solid. You can see it right there, and I'm in the 2D wire frame visual style and I've extruded. Now, what happens if I now look at this and put this on a different layer? So if I select it like that, put it on a different layer.
It's on the objects layer right now. If I put it on the region layer, it goes red like any other object does So an extruded 3D solid can be put on its own layers as well. I'll just hit escape there and obviously undo that layer now because it needs to be on the object layer because it's any object now. It's not a region anymore. So what we've got there is an extruded 3D solid from our region from our AutoCAD 2D drawing.
Skill Level Intermediate
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