Graphics Programs Reference
In-Depth Information
Notice that the UCS icon appears in the same plane as the current coordinate system. The
icon will help you keep track of which coordinate system you're in. Now you can see the chair
components as 3D objects.
Next, you'll defi ne a UCS that is aligned with one side of the seat:
1. Click the Manage UCS tool from the Coordinates tool group of the Tool Sets palette (refer
back to Figure 20.2) or type UCSMAN ↵ to open the UCS dialog box (Figure 20.5).
2. Select the Orthographic tab to view a set of predefi ned UCSs.
3. Select Front in the list box. Figure 20.5 shows the orientation of the Front UCS.
FIGURE 20.5
The six predefi ned
UCS orientations
Back
Bottom
Left
Right
Front
The WCS serves as the top view.
4. Click the Options action menu and choose Set Current from the menu to make the Front
UCS current.
5. Click OK to close the dialog box.
The Orthographic tab of the UCS dialog box offers a set of predefi ned UCSs for each of the six
standard orthographic projection planes. Figure 20.5 shows these UCSs in relation to the WCS.
You may notice that there is no top view. The World Coordinate System (WCS) can be used in
place of a top view.
 
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