Graphics Programs Reference
In-Depth Information
Figure 5.12
Four curves
arranged to cre-
ate the edges for a
surface (left). The
resulting bound-
ary surface formed
from the four curves
(right).
Combining Techniques
You can use certain surfacing techniques in combination to create intricate models. For
example, whenever a curve is required for a surface, you can use an isoparm instead to
create a surface between two existing surfaces.
Try This Take a couple of lofted surfaces, and connect them with a third surface. Figure 5.13
shows two surfaces with two intermediate curves between them. (Notice that the view
panel's option Shading X-ray is turned on so you can see through the shaded surfaces.)
You'll select an isoparm from the first surface (on the left) and then the curve on the left,
the curve on the right, and finally an isoparm on the second surface:
1. Either create two lofted surfaces and curves as shown in Figure 5.13, or load the
Chap_5_Lofting_Exercise_1.ma file from the Lofting_Exercise project on the CD.
2. To select the first isoparm, press F8 for Component Selection mode, and click the
Lines Selection Filter button ( ) in the Status line to allow you to select isoparms.
You can also right-click the surface and choose Isoparm from the marking menu to
enter Component mode for isoparms.
3. Select an isoparm close to the left edge. Press F8 to return to Object Selection mode
(or right-click the first curve and choose Object Mode from the marking menu),
Shift+click the first curve, and then Shift+click the second curve. Press F8 again
or use the marking menu again for Component mode, and Shift+click an isoparm
toward the left edge on the second surface, as in Figure 5.14.
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