Chapter 2 Two-dimensional drawing primitives for CAD
2.1 Introduction and origins of graphic displays on computer
As alluded to in Chapter 1, CAD dates back several decades ago and continues to gain momentum in terms of usage and facilities. Computer graphics (CG) was first developed as a visualization tool, mainly for use by scientists and engineers in the private sector, government and research centres. Because of the increased demands, companies were established to develop specific CAD tools for different applications in many fields of engineering and science. Research institutions and universities also came on board, not only to utilize the CAD systems for training but also to advance and develop other alternatives. ...
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