2009

The Rag Doll constraint uses the parent body as a reference when defining
the limits for the motion of the child body. For example, when your torso
moves, your arm always moves with it. So when modeling a shoulder joint,
you would usually designate the torso as the parent body and the upper arm
as the child body. You can then specify limits on the arm's movement relative
to the torso, as in the above illustration: The arm is allowed to rotate relative
to the torso within the grey limited cone. You can also limit the child body's
ability to twist.
You restrict how a Rag Doll constraint’s child can move relative to the parent
using the constraint’s
Twist, Cone, and Plane limits on page 3957. As with the
other constraints, the constraint space for the Rag Doll joint is defined in each
body's local space; you use this constraint space to define your limits. The
constraint space is defined as follows:
■ The origin as the attachment point of the constraint between the child
and parent bodies.
Constraints | 3949