8

744 Chapter 8: Modifiers
Note:
When you apply the Patch Select modifier
andthengotoanysub-objectlevel,the
select-and-transform buttons in the toolbar
are unavailable, and the Select Object button is
automatically activated.
Using X Form M odif ier s to A nimate a
Pat ch S el ection
When you apply a Pa tch Select modifier, there
are no animation controllers assig ned to the
sub-object selection. This means t hat the selection
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 selection. These modifiers prov ide
the necessary cont rollers for animating the effects
of t ransforms. In a sense, they give "whole-object
status" to the sub-object selection.
•
XForm (page 1–942)
Animates transforms directly on a sub-object
selection. Creates a gizmo and center for the
sub-object selection. You can animate both,
withthecenteractingasapivotpointforthe
selection.
•
Linked XForm (page 1–703)
Lets you choose another object to control the
animation. The sub-object selection is linked to
the "control object." When you transform the
control object, the sub-object select ion follows
accordingly.
Procedure
To use t he pa tch s elect modif ier :
1.
Create or select a p atch object.
2. Go to the Modify panel and choose
Patch Select from the modifier list.
3. Selectvertices,handles,edges,patches,or
elements.
4. Add another modifier to affect only the
selection from step 3.
Interf ace
Modifier Stack
Vertex—Selects vertices.
Handle—Selects handles.
Edge—Selects edges.
Pat ch—Selects patches.
Element—Selects elements.
For more information on the stack display, see
Modifier Stack (page 3–802) .