9
742 Chapter 13: reactor
Properties rollout
Par ent—When on, the Rag Doll has two bodies
and you can designate an object to be the parent
body.Whenoff,theSpringissingle-bodiedand
thepointoccupiedbytheParentSpacesub-object
is the parent.
Youassigntheparentobjectbyclickingthisbutton
andthenselectingarigidbodyfromanyviewport.
Thereafter the button d isplays the name of the
parent body.
Child—Displays the name of the second rigid body
attached to the Rag Doll. You assign the child
object by clicking this button and then selecting a
rigid body from any viewport.
Align S paces To—Use these options to align the
bodies’ local constraint spaces. You can find
out more about each option in Working With
Constraint Spaces (page 2–726).
Lock Rel a ti ve Tra n sf or m —When on, the relative
transform between the child and parent constraint
spaces is locked: If you move either space in the
viewport, the other space moves along with it.
Strength group
Strength/Tau—Gover n the impulses applied to
the constraint’s bodies in order to maintain the
constraint, and so how strongly the constraint
works to restrict their movement. You can find out
more about these parameters in Strength and Tau
(page 2–735).
Limits group
Twist Min—The minimum rotation about the twist
axis the constraint allows between the reference
and attached objects’ constraint spaces. For
example, if Min=–5 then, with respect to the
constraint spaces, the child cannot rotate more
than 5 degrees counterclockwise about the twist
axis.
Twi st Max—The maximum rotation about the
tw ist axis the constraint allows b e tween the
reference and attached objects’ constraint spaces.
Forexample,ifMax=5then,withrespecttothe