ABSTRACT
In this chapter the authors introduce the fundamentals of each and the application of the computerized descriptive geometry (CDG) processes. They utilize a CDG graphics package designed with parametric equations of lines. The solution can be documented by modifications of past solutions stored in the computer-aided design and drafting workstation. This situation of creating a new design by modifying an already existing design is a good candidate for CDG. CDG uses the various types of plane surfaces used in descriptive geometry. Since in theory, every plane in CDG can be extended to infinity, every plane surface displayed may therefore be extended until it intersects at least two of the three coordinate planes. CDG contains the working relationships for constructive geometry: the point, line, and plane combinations that can be displayed in engineering problem solving. CDG can deal with tangent planes and solids, intersection of planes and solids, and development of solids using surfaces, respectively.
