2009

Interface
Modifier Stack
Parent Space At this sub-object level, you can move and rotate the
representations of spin and suspension axes for the chassis. This describes
where on the chassis the wheel is attached and also the directions of the spin
and suspension axes for the chassis. This is defined in chassis space, which
means that if you alter the position or rotation of the chassis the axes will
move as well and maintain their offset rotation and translation with respect
to the chassis. When you assign a chassis to the car-wheel constraint, Chassis
Space’s translation is set to the wheel’s pivot point, the spin axis is aligned to
the wheel’s X axis, and the suspension axis is aligned to its Z axis. If the
car-wheel constraint is single-bodied, then Chassis Space represents the world
orientation and position of the constraint.
Child Space At this sub-object level, you can move and rotate the
representation of the constraint for the wheel. This describes both the location
on the wheel that the constraint considers as its attachment point and the
rotation of the spin axis for the wheel. This is defined in wheel space, which
means that if you alter the position or rotation of the wheel the space moves
as well and maintains its offset rotation and translation with respect to the
wheel. When you assign a wheel body to the Car-Wheel constraint, Wheel
Space’s translation is set to the wheel’s pivot point and the wheel’s spin axis
is aligned to its X axis.
Suspension Rotation This level allows independent rotation of the suspension
axis with respect to the Chassis Space. This means that your suspension axis
doesn’t have to be perpendicular to your spin axis, allowing for a greater range
of constraint setups.
3992 | Chapter 16 reactor