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756 Chapter 13: reactor
axes are defined in the child bo dy’s space, which
means that if you alter the position or rotation of
the child, the space moves as well and maintains
its offset rotation and translation with respect to
the child. When you assign a child body to the
constraint, the Child Space axis is positioned so
that it goes through the child body pivot point,
and the axes are aligned with the child body’s local
space: The prismatic sliding axis is aligned with
the child’s Z axis.
Propertie s rollout
Paren t—When on, the constraint has two bodies
and you can designate an object to be the parent
body. When off, the constraint is single-bodied
and the point occupied by the Parent Space
sub-object is the p arent.