- We're almost ready to really start drawing in our CAD application, but first, let's take a quick look at the common components our geometry will have, as it will be the information we use, both to create the geometry and modify it later on. Here, I have a line, a circle, and a rectangle. If I select each of these, we can see they become dashed, highlighted, and we get a blue box. These blue boxes are called Grips, and they are the bounding information of our shapes. For example, our line has three Grips, one at each endpoint and one at the midpoint.
The circle has five, one at each of the four quadrant points, and one for the center point. The rectangle has eight, four at each of the vertices, and four midpoints. These Grips are tied to the geometry of the shape and abide by the geometric rules of each shape. For example, the midpoint of a line is always equidistant from the two endpoints, so if I click and move one of the endpoints, the midpoint moves accordingly. If you move the midpoint itself, both of the endpoints, and therefore, the whole shape, must move.
The same is true for the circle, as the center point is always the center of the circle. If I move the center point, the circle moves accordingly. I can also click and drag on the quadrants to make a circle smaller or larger. As we work with drawing lines and moving objects, we're constantly asked for reference points for which we can use the geometry of objects already created. These points can be referenced, using what are called Object Snaps, which allow you to literally snap to the appropriate geometry of the objects. These can be typed in any time AutoCAD asks for a point, so we can type in "end" for endpoint, "mid" for midpoint, and so on.
The geometry of the objects we create not only defines the parameters of the shapes, but it also is incredibly useful in modifying the shapes in the future or for creating new objects.
- Accessing palettes
- Changing preferences
- Opening and saving files
- Working with views
- Creating basic geometry: lines, ellipses, splines, and more
- Selecting, moving, copying, and scaling geometry
- Working with layers
- Using gradients
- Creating blocks and dynamic blocks
- Working with references
- Creating layouts
- Annotating drawings
- Plotting and sharing
- Starting in 3D
Skill Level Beginner
1. The Interface
2. File Management
4. Basic Geometry
5. Geometry Tools
6. Modifying Geometry
8. Advanced Objects
11. Plotting and Sharing
12. 3D Basics
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