Graphics Programs Reference
In-Depth Information
FIGURE 20.64
Samples of
the Normal To
options applied
to the same set
of cross sections
D
R A F T
A
N G L E S
The Draft Angles option affects only the first and last cross sections. This option generates
a smooth surface with added control over the start and end angle. Unlike the Normal To
option, which forces a perpendicular direction to the cross sections, Draft Angles allows
you to set an angle for the surface direction. For example, if you set Start Angle to a value
of 0, the surface will bulge outward from the start cross section, as shown in the first image
of Figure 20.65.
FIGURE 20.65
The Draft
Angles options
Likewise, an End Angle setting of 0 will cause the surface to bulge at the end cross section
(see the second image in Figure 20.65).
The Start and End Magnitude settings let you determine a relative strength of the bulge.
The right image in Figure 20.65 shows a draft angle of 0 and magnitude of 50 for the last
cross section.
C
L O S E
S
U R F A C E
O R
S
O L I D
The Close Surface Or Solid option is available only when the Smooth Fit option is selected.
It causes the first and last cross section objects to be connected so the surface or solid loops
back from the last to the first cross section. Figure 20.66 shows the cross sections at the left,
a smooth version in the middle, and a smooth version with the Close Surface Or Solid
option turned on on the right. The Close Surface Or Solid option causes the solid to become
a tube.
