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Drawing Objects

Although most AutoCAD drawings consist of elementary object types such as those discussed in previous chapters, objects that provide the capability to draw complex shapes also are needed—especially when you need to draw smooth, asymmetrical curves beyond what can be achieved with the basic and elliptical arc commands.

Actually, two distinct types of curves can be produced in AutoCAD, each with different commands. The first type of curve can be created with the Polyline command. Polylines are a step above the primary commands because they offer a greater degree of flexibility and can be made up of continuous segments. Polylines, by default, are linear objects that can be converted to represent a curve. They are typically used where multiple lines or arc segments would be tedious to edit as compared to editing a single polyline object. An example of when a polyline might be used to portray a curve would be contour lines on a topographical map.


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