9

Patch Select Modifier 751
Preserve group
Maintains clean sep aration at the face level
between material and smoothness boundaries.
Material Boundaries—Prevents face collapse across
material boundaries. Default=off.
Smooth B oundar ies —Optimizes an object and
maintain its s moothing. When tur ned on, a l lows
only faces that share at least one smo othing group
to collapse. Default=off.
Update group
Update—Updates the viewports with the current
optimization settings. Available only w hen Manual
Update is turned on.
Ma nual Update—Enables the Update button. When
turned off, Opt imize works as it does by defau lt,
updating the viewport display dynamically.
Note: When using Manual Update, if you make any
changes that cause the reevaluation of the stack,
the existing optimization display disappears. Click
theUpdatebuttonagaintorestoreit.
The Renderer ignores the optimization display
in the viewport, using the Opt imize settings,
regardless of the state of the Manual Update.
Last Optimize Status group
Displays numerical results of optimization with
exact before-and-after counts for vertices and
faces.
Pa tch S elect M odi f ier
Make a selection. > Modify panel > Modifier List > Patch
Select
Make a selection. > Mod ifiers menu > Selection M odifiers
>PatchSelect
The Patch Select modifier lets you pass a
sub-object selection up the stack to subsequent
modifiers. It provides a superset of the selec tion
functions available in the Edit Patch modifier (page
1–638). You can select vertices, edges, patches,
and elements. You can a ls o change the select ion
from sub-object level to object level.
Note: When you apply the Patch Select modifier
and then go to any sub-object level, the
select-a nd-transform buttons in the toolbar
are unavailable, and the Select Object button is
automatically activated.
Using X For m M odif ier s to Ani mate a
Patch S electi on
When you apply a Patch Select modifier, there
are no animation controllers assigned to the
sub-object selection. This means that the selec tion
has no way to "carry" the transform information
needed for animation.
To animate a sub-object selection using Patch
Select, apply either an XForm or Linked XForm
modifier to the selec tion. These modifiers provide
the necessary controllers for animating the effects
of transforms. In a sense, they give "whole-object
status" to the sub-object selec tion.
• XForm (page 1–959)
Animates transforms directly on a sub-object
selection. Creates a gizmo and center for the
sub-object select ion. You can animate both,
with the center acting as a pivot point for the
selection.
• Linked XForm (page 1–712)
Lets you choose another object to control the
animation. The sub-object selection is linked to
the "control object." When you t ransform t he
control object, the sub-object selection follows
accordingly.
Procedure
To use the patch select modifier:
1.
Create or select a patch object.