9

Editing Point Sub-Objects 1123
You can also use the Detach button to create a new
NURBSobjectthatisacopyofacurveorsurface
sub-object.Todoso,selectthecurveorsurface,
and click to turn on Copy before you click Detach.
Adialogisdisplayed,whichletsyouenteraname
for the new object. The original curve or surface
sub-objectremainspartoftheNURBSobjectyou
were editing, but the copied curve or surface is
now a NURBS object of its own.
Relational—This toggle affects dependent objects.
When off, detaching a dependent sub-object
makes it an independent object. For example,
detachingaUloftconvertsittoaCVsurface.
When on, detaching a dependent sub-object also
detaches the objects it depends on, so the object
remains dependent. For example, detaching a U
loft also detaches the curves that define it.
Editing Point Sub-Objects
Modify panel > Select NURBS object or sub-objec t. >
Point sub-object level > Select point sub-objects.
Modify panel > Select NURBS object or sub-objec t. >
Right-click. > To o ls 1 (upper-lef t) quadrant > Sub-objects
> Point > Select point sub-objects.
This topic describes the cont rols for point
sub-objects. A rollout labeled Point contains the
point sub-object controls for NURBS models. In
addition to the P oint rollout described here, the
Point sub-object level displays the Soft Selection
rollout (page 1–1147).
Pr ocedur es
To tr ansf orm point s ub-objects:
1.
A t the Point sub-object level, select one or more
points.
Thesub-objectselectiontoolsarethesameas
for other kinds of sub-objects. You can also use
the H key while the Keyboard Shortcut Override
toggle (page 3–872) is on. See Sub-Object
Selection (page 1–1084).
The Selection group box, described under
"Interface" later in this topic, provides
some additional options for selecting P oint
sub-objects.
2. Turn on Move or another transform and then
drag in a viewport to transform the selection.
Theshapeofthemodelchangesasyou
interactively transform the points.
Rotate and Scale are useful only when you’ve
selected multiple points.
Tips
•
The Lock Selection Set button is useful
when you transform NURBS point sub-objects.
You can make a selection in one viewport, click
Lock Selection Set (or press the
Spacebar ),
andthentransformtheselectioninadifferent
view por t.
•Whenyoumovepointsub-objects,movethem
as systematically as possible to avoid "getting
lost."
• Onsurfaces,avoidmovingpointssotheycross
over or under adjacent points. This can create
odd-looking warps or overlaps in the surface.
To Shif t +Clone a point sub-object:
•HolddownShif t while you transform the
point.
This works only for points that lie on curves
or surfaces, independent point (page 1–1219)
sub-objects, and curve point (page 1–1220) or
surface point (page 1–1222) sub-objects that
lie on the curve or surface (that is, that aren’t
displaced).
To use the k eyboard to select point sub-objects:
Yo u c a n s e l e c t p o i n t s u b - o b j e c t s u s i n g t h e Ctrl
key and the arrow keys. The arrows traverse the
sub-objects in the order they were created. To do
so, follow these steps: