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Editing solid models

From: AutoCAD 2011: Migrating from Windows to Mac

Video: Editing solid models

Once you've create a 3D model using the Mac edition of AutoCAD, you'll find that you can make changes to it using the same tools available on the Windows version. In this lesson, we're going to look at the workflow behind editing a model using grips and gizmos. I'm going to start by creating a solid primitive. So, let's make sure the modeling tool set as current. I'd like to create a box. I'll pick a point on screen to get started. I'd like to create a 6 ? 6 ? 6 cube. So I'm going to right-click and select the Cube option.

Editing solid models

Once you've create a 3D model using the Mac edition of AutoCAD, you'll find that you can make changes to it using the same tools available on the Windows version. In this lesson, we're going to look at the workflow behind editing a model using grips and gizmos. I'm going to start by creating a solid primitive. So, let's make sure the modeling tool set as current. I'd like to create a box. I'll pick a point on screen to get started. I'd like to create a 6 ? 6 ? 6 cube. So I'm going to right-click and select the Cube option.

Then I'll come down and lock my Ortho. I'll enter a value of 6 and press Return. Let's do one more thing. I'm going to come down and click the button to expand the status bar such that I can see the 3D settings. Now if your 3D running object snaps are turned on at this point, you can turn those off for now, because we won't be using those in this lesson. One way I can edit 3D geometry is through the use of grips. If I select this, notice I have several grips to choose from.

I have a grip that controls the length, one that controls the width, and one up here that controls the height. Now, I'm just free picking points on-screen to make these changes. I could also enter specific measurements if I want them. For instance, if I select this grip, I'll press the Tab key to access the field that controls the overall length. I'll set this to 5 and press Return. When I'm finished, I'll press Escape. If I wanted to make even more specific changes to this geometry, I can use the Ctrl key.

As I hold the Ctrl key down and move my cursor over this part, notice how different areas are highlighting. I'm going to click to select this face and AutoCAD displays the Move Gizmo. I can use this gizmo to move the face in the direction of the X, Y or Z axis. I'm going to select the X axis and I'll pull this out 2 units and I'll press Return. When I'm finished, I'll press Escape. In addition to the faces, I can also modify edges or vertices.

I'm going to Ctrl+click the top edge of this block. Notice that only the edge is selected this time. Once again, I can use the Move Gizmo to make a change. I'm going to select the Z axis and I'll pull this down 2 units. To adjust a vertex, I'll Ctrl+click on an endpoint. I'm going to pull this up 1 unit. Once again when I'm finished, I'll press Escape. If I want even more control, I can use this flyout to apply a filter to my selection.

If I select Edge filtering for example, I don't even need to use the Ctrl key. I can simply click on an edge to select it. I'm going to select this edge. I'll grab the Y axis. I'll pull it out to here. Notice the Edge filtering stays on until you come down and turn off the Subobject filtering. The flyout next to the Filters lets me select a different gizmo. Notice that in addition to Move, I also have a Rotate and Scale Gizmo. This means when I'm working on my 3D geometry, I can move, scale, or rotate any face, edge, or vertex on my part.

These tools aren't just for solids, they also work with surfaces and 3D mesh objects. Knowing what we know now, I'm going to pan this drawing over. Let's make some design changes to this mechanical part. Now this part was created using several solid primitives that have been union together to create a single object. Let's start by making this ridge smaller and we'll move it down 0.5 units. To do that, I'll hold down my Ctrl key. Notice as I pass my cursor over the part, AutoCAD remembers the primitives that were used to construct this geometry.

I'll select this ridge. This was created as a cylinder. Notice I have access to all of the grips. I'm going to select this grip and I'm going to turn off my running object snaps momentarily. I'll pull this grip in a distance of 0.25 and I'll press Return. Then I'll grab the Z axis and I'll push this ridge down 0.5 units. When I'm finished, I'll press Escape. Let's try something else, maybe I'd like to remove this chamfer.

To do that, I'll hold my Ctrl key and click to select it and then I'll press the Delete key to take it away. Take a look at the slot that runs vertically through the part. I'd like this slot to be twice as wide on the top as it is on the bottom. To do that, I'm going to use an Edge filter. I'll select this edge. I don't want to move this edge. Let's change this to a Scale Gizmo. I will then click at the base of the gizmo and I'll enter a scale factor of 2 and press Return.

When I'm finished, I'll click Escape. I will also turn off my Subobject filtering. Let's try modifying the drilled hole. Instead of running side-to-side, I'd like the hole to be drilled from the front to the back of the part. To make that change, I'll hold my Ctrl key and I'll select the hole. I will then switch to the Rotate Gizmo. By default, your objects will rotate around the center of the gizmo. I'd like this hole to rotate around the center of the part.

So I'm going to turn my running object snaps back on momentarily. I'll right-click on the gizmo and select Relocate. I'll snap this to the center of this cylinder. I will then select the blue ribbon and I'll rotate this hole 90 degrees. When I'm finished, I'll press Escape. Now on occasion this may happen. There is actually nothing wrong with the part. This is just a visual issue. If this happens, one way to correct it is by saving the drawing and then reentering it and everything is fine.

Something else you can try is a Command+Z to undo and then apply the change again. I'm going to hold my Ctrl key and I'll select the hole. Let's right click. We'll relocate the gizmo to the center of the cylinder. I'll select the ribbon. I'll rotate this 90 degrees and press Return. When I'm finished, I'll click Escape. When it comes to editing a 3D model, it's easy to see that the workflow is the same between the Windows and Mac platform. The only real difference is where we access our settings.

On the Mac platform, you'll find many of your favorites down here in the status bar.

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AutoCAD 2011: Migrating from Windows to Mac

35 video lessons · 4025 viewers

Jeff Bartels
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