8

Envelope Sub-Object 983
Link—Tur n on to selec t l inks in the v iew por ts
and edit the selected link’s envelope parameters.
Forexample,youmightturnonLink,selecta
biceps link, CT RL+click to add the opposite bicep
to the selection, then edit envelope parameters for
both link s at the same time.
Cross S ection—Tur n on to edit envelop e c ross
sections, changing the envelope’s shape and thus
its area of influence.
Forexample,youmightturnonCrossSection,
select a cross section on the inner or outer
boundary of an envelope, and then move or scale
it. You might Non-U niform Scale the cross section
of a collar envelope so it a voids vertices in the chest
area.
Control Poin t—Turn on to edit the control
points on a cross section.
Forexample,youmightturnonControlPoint,
select a point on a cross section of an envelop e,
and move the point to change the envelope’s shape
and area of influence.
Pr eviou s a nd Nex t—Click to move to
the next or previous link, cross section, or control
point, depending on which selection level is active.
Active Blending group
Deformable—When on, enables a deformable
envelope for the selected links. Default=on.
By default, deformable envelopes are shown in red.
Rigid—When on, enables a rigid envelope for the
selected links. Default=off.
By default, rigid envelopes are shown in green.
Impor tant: You can have both a deformable and a rigid
envelope turned on for the same link. Normally, you use
one or the other. By non-uniform scaling the rigid and
deformable envelopes for one link, you can position
oneenvelopeontopoftheother. Forexample,you
could control the shoulder with a rigid envelope and the
armpit with a deformable envelope. Both envelopes can
also be turned off for a link.
Partia l B lending—
Tur ns on p artia l blending for the
selected links. Leave either a deformable or rigid
envelope on, and then turn on Partial Blending.
Physique calculates the weights of each link on
a given vertex. If Partial Blending is
off ,andthe
total weight is less than 1, Physique normalizes
the combined weight to 1. If Partial Blending is
on , the weights are allowed to remain at a value of
less than 1. The remainder is filled in by the root
node, the equivalent of no influence. See
Partial
Blending and Weight Assignments (page 2–944)
for a detailed explanation of how the program
calculates these values.