Chapter 24 - Boolean Operations

Abstract

This chapter discusses ways to create designs that feature openings and holes as well as complex unions and intersections. The functionality, referred to as Boolean operations, is very important for advanced 3D modeling in both architectural and mechanical design. Three Boolean operations are discussed, namely, union, subtract, and intersect. All three Boolean operators can be accessed via typing, cascading menus, a toolbar and the Ribbon. The union operation fuses solids or regions together into one object. Subtract is a frequently used command, and it is quite indispensable in 3D work. In AutoCAD, this is the only way to take away material to create an empty space. Intersect command creates a new shape out of the overlapping parts of other shapes and can be used to create some interesting objects. Furthermore, this chapter presents a practice drawing to create a basic 3D model of two building walls, complete with a door and a window opening. Although this model is quite simple, it contains many of the important elements needed to create an entire building in 3D, the differences being only the amount of pieces present and some minor refinements.