8

Cloth Modifier 569
On saving the file, the cache is incorporated into
the MAX file. When Sim On Render is on, the
cache file specified is created and wr itten to, but is
not read from as you change the time slider. The
cachefilemustbe
loaded into the internal cache
file
before you can see it.
Advanced P inching—When on, Cloth tests for cloth
pinched between two parts of the same collision
object.
This option helps with cloth colliding with small
feat ures of the collision objects, such as fingers.
Currently there is a significant performance hit for
high-resolution collision objects.
Group rollout
The Group sub-object rollout is for selecting
groups of vertices and constraining them to
surfaces, collision objects, or other cloth objects.
At the Group sub-object level, all selected objects
that are part of the Cloth simulation are shown
w ith their vertices visible so that you can select
them in an efficient fashion.
When you create or select a group at this sub-object
level, the Group Parameters rollout becomes
available.
Impor tant: The concept of a group for Cloth can be
applied to both the cloth objects and to the collision
objects i n the simulation. And when created, groups can
then be given unique properties. For exam ple, a group
on a collision objec t can have a different collision offset
from the rest of the object. This is a powerful feature
when working with groups.
Note:
You can select groups of vertices explicitly,
with the mouse in the viewports, and you can
also specify a sof t select ion or use a texture map
to select vertices using controls on the Group
Parameters rollout. See
Soft Selection group (page
1–576)
. In addition, named selection set (page
1–85)
toolsareavailableatthislevel.
Mak e Group—Makes a group out of selected
vertices. Select the vertices to include in the group,
and then click this button. Name the group, and it
will then show up in the list below for you assi gn
to an object.
Delete Group—Deletes the group highlighted in
the list.
Detach—Removes any constraint assigned to the
group and sets it back to being unassigned (i.e.,
without any constraint). Any unique properties
assigned to this group wil l remain in effect.
Initialize—Constraints that involve attaching
the vertices to another object (Node, SimNode,