Graphics Programs Reference
In-Depth Information
Chapter 17
Drawing Curves
So far in this topic, you've been using basic lines, arcs, and circles to create your drawings. Now
it's time to add polylines and spline curves to your repertoire. Polylines offer many options for
creating forms, including solid fills and free-form curved lines. Spline curves are perfect for
drawing accurate and smooth nonlinear objects.
In this chapter, you'll learn to do the following:
Create and edit polylines
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Create a polyline spline curve
Create and edit true spline curves
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Mark divisions on curves
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Introducing Polylines
Polylines
are like composite line segments and arcs. A polyline may look like a series of line seg-
ments, but it acts like a single object. This characteristic makes polylines useful for a variety of
applications, as you'll see in the upcoming exercises.
Drawing a Polyline
First, to learn about the polyline, you'll begin a drawing of the top view of the joint shown in
Figure 17.1.
FIGURE 17.1
A sketch of a
metal joint
