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948 Chapter 14: Character Studio
• Adding bulge ang les to the links at places where
real muscles would bulge.
Once the skin reac ts well to the full range of
motions, you can then place the character into a
less demanding pose and it should work perfectly.
Tendons
Tendonstielinkstogether,extendingtheeffectof
moving one link to another link where the tendon
is based. Their effect is similar to that of tendons
in a body.
For example, raising an arm usually stretches the
skin along the same side of the body. To get this
effect using Physique, you could base a tendon
on a spine link, t hen attach it to t he upper arm or
collarbone, so when the arm lifts, the skin around
the torso stretches as wel l.
see
Creating Tendons (page 2–948) for more
information about creating tendons.
See also
Tendons Sub-Object (page 2–998)
Cr e a t in g Ten d on s
Liketendonsinanactualbody, tendons in
Physique (page 2–998)
link one bone to another .
They spread the effect of moving one link to the
skin around a different link. Tendons can improve
the realism of skin movement when it is animated
by Physique.
Basically, a tendon consists of base points that live
on a cross sect ion near t he skin. A base point is
attached to another link on the skeleton that pulls
it.Asthetendonbasepointispulled,itdeforms
the sk in around it. Several parameters control how
much the point is pulled in each direction.
You insert the tendon cross section at the location
where you want the skin to stretch. You then attach
it to the lin k that influences the movement.
Eachlinkcancontainseveraltendoncross
sections, and each control point may be attached
to a separate link. In a practical application,
however, such as in the area below the armpits, you
might have two control points attached to each of
the left and right clavicles.
Procedures
To create and attach a tendon:
1.
Go to the Tendons sub-object level. In the
Selection Level group of the Tendons rollout,
turn on Link.
2. Inaviewport,selectalink.
3. In the Insert Settings group, click to turn on
Insert.
4. In a viewport, position the cursor over the link.
The cursor changes to a small star.
5. Click to create cross sections on the link.
6. Click to tur n off Insert.
Tip: Yo u c a n a l s o r i g h t - c l i c k i n a v i e w p o r t t o
turn off tendon creation.
7. IntheSelectionLevelgroup,turnonCross
Section.
8. U se the Rotate tool to rotate the cross
section so the control points are positioned in
useful places.
9. In the Tendon Parameters group, use the Radius
spinner to scale the c ross section radially so the
control points fall close to the surface of the
skin.