Hello Daily AutoCAD readers,

In the third article of our series of articles about solid modeling, I explained about UNION and SUBTRACT and gave an example. And in this article, I will explain more about positioning the solid entities that make up the solid.

Fig.1

You can construct the solid entity that is shown in Fig. 1 by using the primitive entities that you see below (Actually, one of them is not primitive but I will also explain how to make it).

Fig.2

All you have to do is to move the entities that you made by using MOVE command.

Fig.3

As you see in Fig. 3, move the half cylinder to its locations (from middle point to middle point) and merge them by using UNION command. I suggest that you should prefer the easier points to grasp on entities while using MOVE command. Here, I preferred the top middle points.

Fig.4

Now, you must have obtained the solid entity that is shown in Fig. 4. From now on, you can grasp the small cylinder from the center and SUBTRACT it. In the following articles in this series, we will have to re-position more complex entities. In such cases, we will have get use not only MOVE command but also UCS.

Good Bye and have a nice day…
See previous articles of series : See “3D Modeling” chapter in AutoCAD Lessons.

Technorati Tags: AutoCAD, AutoCAD 2008, 3D Modeling, solid modeling, UNION, SUBTRACT

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3D, 3D Modeling, AutoCAD 2008, Autocad