12.2 Introduction
Common computer graphics programs, such as Microsoft’s Visio or The Omni Group’s OmniGraffle, allow users to select the shapes they want in their drawing from a palette of available shapes. For simple drawing programs, this palette may include lines, circles, squares, triangles, and other common shapes. For more advanced drawing programs, such as architecture programs or computer-aided design (CAD) programs, the palette may include sophisticated shapes, such as cabinets, bathroom fixtures, or even specific parts for a car. These kinds of drawing programs are typically called object-oriented drawing programs.
Object-oriented drawing programs are easy to use. If your drawing calls for a square, or any other shape, you drag the ...
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