Chapter 3

2D Geometric Modeling

Computer aided design (CAD) system is a very strong and useful tool when you require high precision or complex rational shapes in drawing or modeling. To effectively use CAD system to construct computer models, you need to understand how CAD system functions (how objects are represented in the computer) and the procedures to construct what you want. Because there are many ways to represent objects in the computer, you need to know each of the ways. Now you will learn the principles of 2D modeling to get familiarize with the concepts of the CAD environment. 2D CAD model is the most primitive kind of computer model.