Creating 3D Geometry - AutoCAD 2011 and AutoCAD LT 2011: No Experience Required - page 862

FiGuRE 16.35 The 3D Rotate gripper
Completing the Windows
When Boolean operations are used, the component objects, called operands, are
not replaced with the resulting object; they just become subobjects of it. You
always have the ability to edit the operands and alter the object itself. Here's how:
1. Copy the existing window frame and glazing, and move the copy in
front of the 5 ′ -0 ″ (1525 mm) window on the south side of the cabin;
then zoom into that window.
2. With the two objects selected, click the 3D Rotate tool in the Modify
panel.
3. At the Specify base point: prompt, click the endpoint of the lower
corner of the frame nearest to the cabin. The 3D Rotate gripper relo-
cates to the specified corner.
4. At the Pick a rotation axis: prompt, click the blue z-axis ring. It
turns yellow to indicate that it is the currently selected axis, and a blue
line is emitted from the 3D Rotate grip tool to identify the pivot axis.
5. Imagine your right hand gripping the blue axis line with your thumb
pointing upward, as in the hand shown in Figure 16.34. This shows
you that a positive rotation, the direction your fingers are pointing
in, is required to rotate the window counterclockwise.
Enter 90 ↵ at the Specify angle start point or type an angle:
prompt (see Figure 16.36). The window rotates 90°.
This window is currently 4 ′ -0 ″ (1220 mm) wide, while the opening is 5 ′ -0 ″
(1525 mm) wide. You can correct the discrepancy by editing the subobjects of
the window frame. Subobjects are selected by holding the Ctrl key down while
selecting an object. Follow these steps:
1. Turn running object snaps off and turn Polar Tracking on.