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288 Chapter 5: Creating Geometry
Spline steps can be either adaptive or manually
specified. The method used is set by the state of
theAdaptivecheckbox.Themainuseformanual
int erpolation is to create splines for morphing
or other operations where you must have exact
control over the number of vertices created.
Optimi ze—When on, removes unneeded steps
from st raight segments in the spline. Default=on.
Note: Optimize is not available when Adapt ive is
on.
Optimizewasusedtocreatesplineinthislathedobject.
Adaptive—When on, automatically sets the
number of steps for each spline to produce a
smooth curve. Straight segments always receive
0 steps. When off, enables manual inter polation
control using Optimize and Steps. Default=off.
Selec tion rollout
Provides controls for turning different sub-object
modes on and off, working with named selections
and hand les, display settings, and information
about selected entities.
When you first access the Modify panel with
an editable spline selected, you’re at the Object
level, with access to several funct ions available
as described in
Editable Spline (O bject) (page
1–290)
. You can toggle the sub-object modes and
access relevant functions by clicking sub-object
buttons at the top of the Selection rollout.
You can work with parts of shapes and splines
using shape sub-object selection of the Editable
Spline object. C licking a button here is the same
as selecting a sub-object type in the Modifier List.
Click t he button again to turn it off and return to
object selection level.
Vertices—Define points and curve tangents.
Segments—Connect vertices.