2009

You can move the constraint space relative to each of the bodies by going to
the constraint's Parent Space or Child Space sub-object level in the modifier
stack, and then using the Move and/or Rotate tools. The space will then
maintain its position and/or orientation relative to the corresponding object
during the simulation.
reactor also provides some quick shortcuts for aligning constraint spaces,
available with each constraint. These are:
■ Align Spaces To Child Body This is the default alignment for all
constraints except Spring, the Stiff Spring variant of Point-Point, and
Point-Path.
■ Align Spaces To Parent Body The constraint space is aligned with the
parent body: The pivot point is positioned at the parent body's pivot point,
and the constraint space takes its orientation from the parent object's local
space.
■ Align Spaces To Child Space Aligns the parent and child constraint spaces
with the child's constraint space. So, for instance, if you move the
constraint space relative to the child, you can use this option to move the
parent's constraint space into alignment with it.
■ Align Spaces To Parent Space Aligns the parent and child constraint
spaces with the parent's constraint space. So, for instance, if you move the
constraint space relative to the parent, you can use this option to move
the child's constraint space into alignment with it.
Certain constraints have additional alignment options:
■ Align Spaces To Each Body (Spring and Point-Point > Stiff Spring only)
This option aligns each local constraint space (and hence the spring
attachment point) with the relevant body, so each body's attachment point
is at its pivot. It also sets the spring length to the current distance between
the nodes. This is the default alignment for springs and stiff springs.
■ Align Parent Space To Path (Point-Path constraint only) This option
aligns the parent space with the local space of the shape used for the
constraint's path. This is the default parent space alignment for the
Point-Path constraint.
Constraints | 3929