8

Adjusting Default Envelope Shape 939
To a djust envelopes ar ound the biped’s pel vis:
The Biped Triangle Pelvis option was used in this model.
Tr iangle Pelvis creates a dditional links from the legs to the
lower spine.
Top: The default envelope from the pelvis to the lower spine
object is too small.
Middle: Mesh appears “scrambled” because the pelvis
doesn’t control all the vertices that surround it.
Bottom: Increasing the envelope size corrects the m esh
problem in the pelvis area.
1. IntheSelectionLevelgroup,turnonLink.
Inaviewpor
t, select the middle link.
2. In the Param
eters g roup, turn on B oth, and
then increase the value of Radial Scale until
the outer envelope just surrounds the mesh in
pelvis are
a.
Note: With Both tur ned on, both the inner and
outer bounds scale together.
3. Increase the Parent Overlap value u ntil the
inner (red) envelope appears through the mesh.
4. If necessary, decrease the Falloff value to
strengthen this envelope.
5. To finish correcting the pelvis area, adjust the
Overlap of the thigh and buttock envelopes.
To select a nd edit cr oss sections:
1.
On the Selection Level rollout, turn on
Cross Section.
2. IntheEnvelopeParametersgroup,turnon
Inner or Outer if you wa
nt to work with cross
sections solely in that part of t he envelope. Turn
on Both to be able to work on both Inner and
Outer cross sect ions
atthesametime.
3. Turn on Select Object on the Main
toolbar , and in a viewport, click the cross
section you want.
As you move the curs
or over a selectable cross
section, it changes to a plus shape, letting you
knowtheobjectatthatlocationisselectable.
By default, selected cross sec tions are yellow.
(You can customi
ze this color with the
Blending
Envelope Display Options dialog (p age 2–976)
.)
You can use CTRL+click to add other cross
sections to the selection set.
4. UseRadialScaletoresizetheselectedcross
section, and th
etransformtoolstomove,
rotate, and scale it.
5. To m o ve to t h e a d j a c e n t c ross
sectionwithinthecurrentbound,clickNext
or Previous.
Tip: You can also use the Control Point level
to individually t r ansform cross sect ion control
points.