TABLE OF CONTENTS As mentioned earlier in this chapter, you can create a new composite solid or region by combining two or more solids or regions via Boolean operations. Although the term Boolean implies that only two objects can be operated upon at once, AutoCAD lets you select many solid objects in a single Boolean command. There are three basic Boolean operations that can be performed in AutoCAD: Union, Subtraction, and Intersection
The UNION, SUBTRACT, and INTERSECT commands let you select both the solids and regions in a single use of the commands, but solids are combined with solids, and regions combined only with regions. Also, in the case of regions you can make composite regions only with those that lie in the same plane. This means that a single command creates a maximum of one composite solid, but might create many composite regions.
Union is the process of creating a new composite object from one or more original objects. The union operation joins the original solids or regions in such a way that there is no duplication of volume. Therefore, the total resulting volume can be equal to or less than the sum of the volumes in the original solids or regions. The UNION command performs the union operation.
Invoke the UNION command from the Modeling toolbar (see Figure 15-81).
AutoCAD prompts:
Select objects: <i class="emphasis">(select the objects to make one composite object and press</i> ENTER <i...
