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484 Chapter 20: Managing Scenes and Projects
• Multiply Derived S cale—(The default.) When
chosen, scaling for the selected mappings is
basedonboththeXYZsettingsinthisgroup,
and calculat ions f rom the Derive Scale Between
Chains group and the FK Retargeting Extent
group (if that is used).
X/Y /Z—You can use these fields to explicitly set
the scaling factor for the currently highlighted
mappings.
Scale Origin group
Incoming—Choose the incoming object f rom
which to derive the scaling origin. This is a
drop-down list obtained from the list of incoming
nodes.
Current—Click to display a Select dialog and chose
the current object from which to derive the scaling
origin. The dialog shows all currently selected
objects.
Typically, you set these two to be the incoming
root node and current root node, whose motion
tracks are a lready mapped.
Derive Scale Between Chains group
Resulting Scale Factor—Displays the scale
factor derived from the Scale Origin and
Incoming/Current Chain settings. Check this
value to see that it matches the apparent difference
in prop ortion between the objects or characters
you are retargeting.
Incoming Chain—Thesecontrolssettheincoming
IK or FK chain to use in calculating the Scale
Factor.
•
Start—Choose the start of the incoming chain.
This is a drop-down list obtained from the list
of incoming nodes.
When retargeting character animation,
typically you choose the top of the incoming
character’s leg; for example, the thigh.
•
End—Choose the end of the incoming chain.
This is a drop-down list that is restricted to
children of the incoming Start object.
When retargeting character animation,
typically you choose the end of the incoming
character’s leg; for example, the toe.
Current Chain—These controls set the incoming IK
or FK chain to use in calculating the Scale Factor.
•
Start—Click to display a Select dialog and
choose the start of the current chain. The dialog
shows a ll cur rently selected objects.
When retargeting character animation,
t ypically you choose the top of the current
character’s leg (using the same side as you used
for the incoming chain).
•
End—Choose the end of the current chain. This
is a drop-down list that is restricted to children
of the cur rent Start object.
When retargeting character animation,
typically you choose the end of the current
character’s leg.
If a character’s legs are symmetrical, which is
usually the case, you only need to calculate the
retargeting scale for one leg, and then Set that value
to both. If the character’s legs are not symmetrical,
you need to calculate values for both legs, and also
use t he FK Extents controls (described b elow).
FK Retargeting Extent group
WhenthecurrentmodelusesIK,3dsMaxknows
theextenttoretargetbecauseitisdefinedbythe
IK solution. But if the cur rent model uses FK,
you should specify the extent of retargeting. For
example, mapping rotation animation from a
long leg to a short leg with different link lengths
requires that the short leg’s foot be chosen to
retarget so it ends up meeting the floor in the same
way the long leg does. In order for 3ds Max to
know how far up the chain from the foot to do the
retargeting, the parent of the desired chain (for