The lines tool lets you draw a curved line
that consists of one or more line segments. Each Bézier curve segment
is defined by two data points (end points) and one or two
control points (handles) that you can drag to adjust the arc of the
curve.
A control point, represented as a circle, is connected to
a data point, represented as a square, by a control line. Moving a
control point pulls the curve towards it, and changes the shape of
the curve.
A Bézier curve consists of
three types of data points.
- Symmetrical
- A symmetrical data point has the same line curvature on either
side, and two control lines that move together as a straight line.
- Smooth
- A smooth data point has different line curvatures on either side,
and two control lines that move together as a straight line.
- Corner
- A corner data point has one or two control lines and joins different
line segments.