2004

290 | Chapter 16 Draw Geometric Objects
To set point style and size
1 From the Format menu, choose Point Style.
2 In the Point Style dialog box, select a point style.
3 Under Point Size, specify a size, either relative to the screen or in absolute
units.
4 Choose OK.
Command line
DDPTYPE
To create a point object
1 From the Draw menu, choose Point ➤ Single Point.
2 Specify the point location.
You can snap to a point using the Node object snap.
Draw toolbar
Command line
POINT
Draw Construction Lines (and Rays)
Lines that extend to infinity in one or both directions, known as rays and
construction lines, respectively, can be used as references for creating other
objects. For example, you can use construction lines to find the center of a
triangle, prepare multiple views of the same item, or create temporary
intersections to use for object snaps.
Infinite lines do not change the total area of the drawing. Therefore, their
infinite dimensions have no effect on zooming or viewpoints, and they are
ignored by commands that display the drawing extents. You can move,
rotate, and copy infinite lines just as you can move, rotate, and copy other
objects. You may want to create infinite lines on a construction line layer
that can be frozen or turned off before plotting.
Construction Lines
A construction line (xline) can be placed anywhere in three-dimensional
space. You can specify its orientation in several ways. The default method for
creating the line is the two-point method: you specify two points to define
the orientation. The first point, the root, is the conceptual midpoint of the
construction line, that is, the point snapped to by the Midpoint object snap.
You can also create construction lines in several other ways.
■ Horizontal and Vertical. Create construction lines that pass through a
point you specify and are parallel to the X or Y axis of the current UCS.