2004

378 | Chapter 17 Change Existing Objects
3 Specify the base point for the rotation.
4 Enter r (Reference).
Now define the reference and new angles by selecting the objects you are
aligning.
5 Enter int (Intersection object snap), and select the intersection point (2)
to begin defining the reference angle.
6 Enter end (Endpoint object snap), and select the endpoint of the object
you are rotating (3) to complete the definition of the reference angle.
7 Enter end again, and select the endpoint of the object you are aligning to
(4).
Modify toolbar
Command line
ROTATE
To rotate a 3D object about an axis
1 From the Modify menu, choose 3D Operation ➤ Rotate 3D.
2 Select the object to rotate (1).
3 Specify the start point and endpoint of the axis about which the objects
are to be rotated (2 and 3).
The positive axis direction is from the start point to the end point, and the
rotation follows the right-hand rule (see “Use World and User Coordinate
Systems in 3D” on page 225).
4 Specify the angle of rotation.
object selected
reference angle
specified
new angle specified—
object rotated
1
2
3
4