Introduction

Abstract

In a society in which the use of information technology is becoming commonplace it is natural that pictures and images produced by electronic means should be increasing in importance as a means of communication. Computer graphics have only recently come to the attention of the general public, mainly through animated drawings, advertisements 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 connection with the space shuttle for example, represent a great and rapid progress. In industry, computer graphic techniques are used not only for the presentation of business data, but also in design and manufacture processes.