The use of computer-aided design (CAD) systems always involves the introduction of mathematical concepts. It is important, therefore, for any systems designer to have a good grasp of the mathematical bases used in CAD. The choice of mathematical models in a system also has an effect on the overall quality, although this effect may not always be visible to the final user. Depending on whether Bezier or B-spline functions are used for curves and surfaces, for example, the final user even if not a com- puter scientist will notice a difference. If, for example, one of the control points is...

In a society in which the use of information technology is becoming commonplace it is natural that pictures and images produced by elec- tronic means should be increasing in importance as a means of com- munication. Computer graphics have only recently come to the atten- tion of the general public, mainly through animated drawings, advertise- ments and video games. The quality of the pictures is often such that, unless informed of the fact, people are unaware that they are created with the help of computers. Some simulations, those developed in con- nection with the space shuttle for example,...