9.5.2

572 • CHAPTER 10
STRUCTURE MENU • 573
Mirror
Using the Mirror tool, points and polygons can be mirrored. This tool functions in point or polygon
mode. In point mode, only the selected points are mirrored (without their surfaces). If no points are
selected, all points are mirrored. In polygon mode, the selected surfaces are mirrored. If no surfaces
are selected, all surfaces are mirrored.
Mirror can also be applied to splines. The selected points are mirrored as a new segment.
Mirror functions interactively. This means you can control the mirroring directly with the mouse; to
choose which axis is to be used for mirroring, click and drag until you see the axis you want, then
release the mouse button.
Attribute manager settings
Coordinate System
Selects the coordinate system for the tool. In all the modes below, remember to keep the mouse
button pressed. You will then be able to choose the mirror axis by dragging it with the mouse to where
you want the mirroring to occur. When you release the mouse button, the mirroring is applied.
Object
In this mode, the object is mirrored about the object axes. You can set the mirror axis using the mouse
by clicking directly on an object point. The mirror axis automatically locates itself on the nearest point.
The object is then mirrored exactly through this point. You do not necessarily have to be in point
mode; the points are also located in this way in polygon mode. The object mode also allows the input
of numeric values (see Value).
World
This mode is the same as object mode, except that the element is mirrored over the selected world
axis. Like the object system, the world mode also allows the input of numeric values (see Value ).