8

Display Controls for NURBS Models 1119
Procedure
To use nonrelational NURBS surfaces:
1.
Make sure Relational Stack is off and Shaded
Lattice is chosen.
2. Set up your modifiers and animation.
3. If your model has only independent CV
surfaces,youcanrenderitnow. Ifithas
relational surfaces such as blends or lofts, then
before you render, choose the NURBS model at
the bottom of the stack, and tur n on Relational
Stack.
When you return to the top of the modifier
stack, performance is slower but dependent
surfacesareaccurate.ThemodifiedNURBS
modellooksdifferentthanitdidwiththe
nonrelational stack. Usually the difference in
appearance isn’t g reat, but the nonrelational
stack can show anomalies such a s cracks
between Blend surfaces.
Dis play Contr ols f or NUR B S
Models
Modify panel > Select NURBS object. > General rollout
> Display group, Surface Display group, and NURBS
Creation Toolbox button
Modify panel > Select NURBS objec t. > Right-click in
viewport. > Display commands on the Tools 1 (upper-left)
quadrant of the quad m enu
The check boxes on the General rollout for a
NURBS curve or surface control how the object
is displayed in viewports. If all check boxes are
turned off, the NURBS object is invisible (except
for the white bounding-box indicators displa yed
in shaded viewports when the object is selected).
An additional rollout,
Display Line Parameters
(page 1–1120)
, contains controls for how surfaces
display in v iewports.
Interf ace
Display group
Lattices—When on, displays control lattices in
yellow lines. (You can change the lattice color using
the
Colors p anel (page 3–843) of the Customize
UserInterfacedialog.)TheCurveCVandSurface
CV sub-object levels also have a local Display
Lattice toggle, which overrides this global setting
at the sub-object level. The Cur ve CV and Surface
CV settings are independent. In other words, at
the sub-object level you can turn on the lattice for
an object’s curves but not its surfaces, or vice versa.
Keyboard shortcut (while Keyboard Shortcut
Override Toggle is on): CTRL+L
At the object level, this shortcut is equivalent to
turning Lattice on or off. At the sub-object level,
CTRL+L overrides the setting of L attice, toggling
the local Display L attice setting.
Curves—When on, displays curves.
Keyboard shortcut (while Keyboard Shortcut
Override Toggle is on): CT RL+SH IFT+C
Surf aces—When on, displays surfaces.
Keyboard shortcut (while Keyboard Shortcut
Override Toggle is on): CT RL+S HIF T+S
Dependents—When on, displays dependent
sub-objects.
Keyboard shortcut (while Keyboard Shortcut
Override Toggle is on): CTR L +D