Graphics Programs Reference
In-Depth Information
A
D D I N G
CV
S
T O
A
NURBS S
U R F A C E
The next exercise shows you how you can add additional CVs through the Rebuild option:
1.
Click the surface to select it and then right-click and select NURBS Editing
Rebuild. The Rebuild Surface dialog box appears (see Figure 23.51). You can also type
CVREBUILD
↵ or choose Modify
Surface Editing
NURBS Surface Editing
Rebuild.
FIGURE 23.51
The Rebuild Sur-
face dialog box
2.
In the Control Vertices Count group of the Rebuild Surface dialog box, make sure the In
U Direction option is set to 8 and the In V Direction option is set to 7.
The U direction is along the horizontal curve, while the V direction is along the straight,
vertical curve. If you count the CVs in each row or column, you'll see that they match the
values you entered for U and V.
3.
Click OK. Now you see that many more CVs are available.
Now if you were to move a CV, the surface is able to deform along the Z axis, where it
remained a straight line before.
