2009

This places you in a Pick mode where you can choose a motion track
from any object in the scene to act as master.
8 In any viewport, click the box (Box01).
A pop-up menu appears.
9 From the pop-up menu, choose Transform > Position > X Position.
The “Unassigned” text is replaced by a master track labeled “Box01 / X
Position”.
Also, a new state, State01, appears in the States list.
This is an example of the basis of the control mechanism used by the
Reaction controller: For each master/slave combination, you can specify
any number of states defined by values for the master and slave tracks.
The first state, created automatically when you added the master, specifies
that when the box is at -100 on the X axis, the sphere should be at
(-100,0,50). In this case, you're controlling three parameters (the sphere
position on all three axes) with one (the box position on the X axis).
More typically you'd use one-to-one master/slave-parameter ratios.
NOTE Reaction Manager also defines a state automatically when you assign
a new slave to a master.
Reaction Controllers | 3225