Caption

Car design. Computer-Aided Design (CAD) graphic of a car. The main structure of the car's body is represented by a blue frame. The panels covering this structure, the engine, and the wheels, are represented by yellow lines. Each point on this frame can be represented as a set of coordinates in three dimensions. The three dimensions have been marked in red on this CAD graphic as "X", "Y", and "Z". CAD is an important tool in mechanical design, allowing the vehicle to be viewed from any angle. Changes to the detailed structure may be made rapidly, and the effect on the rest of the design calculated quickly.