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as master. Alternatively, choose a track in Track View or from the Motion
panel > Assign Controller rollout list.
Using the pop-up menu, you can choose only a track at the end of the menu
hierarchy; for example, Transform > Position > X Position. If you choose the
object name from the top of the menu, Reaction Manager lists it as World
Space Position, so that you can use its three-dimensional position in the World
coordinate system to control its slaves.
To use a Position or Rotation track for the master, click Add Master and then
click the track in Track View or the Motion panel > Assign Controller rollout
list. In the latter case, the object must already be selected in the viewports
before clicking Add Master in order for it to show up on the Assign Controller
rollout list. If using Track View, you can open the Track View dialog before
or after clicking Add Master.
TIP If you use Track View or Motion panel to assign a Reaction controller to an
animation track, the object shows up in Reaction Manager without a master
(“Unassigned”). To assign a master, right-click the highlighted “Unassigned” label,
and then choose Replace Master from the context menu. Finally, choose the master
track.
Add Slave Places you in Add Slave mode, letting you assign a slave track
to the currently highlighted master in the Reactions list. Highlight a master
and then click Add Slave. Click an object in a viewport, and then use the
pop-up menu to choose an animation track to use as slave. Alternatively,
choose a track in Track View or from the Motion panel > Assign Controller
rollout list. Available only when a master is highlighted in the Reactions list.
To add multiple slaves, click Add Slave and then press H to open the Pick
Object dialog. Highlight the objects to add, and then click Pick. The pop-up
menu then appears, prompting you to choose an animation track to use as
slave. The same track is used from each object. Alternatively, select the objects
and then use Add Selected (see following).
If multiple masters are highlighted when you add a slave or slaves, the slave
is added to the first master in the list.
If any states are highlighted in the States list, the new slave or slaves are added
to the highlighted states. If no states are highlighted in the States list, Reaction
Manager creates a new state with the added slave or slaves.
Add Selected Lets you add slave tracks to the current master for any
selected objects in the viewports. Opens a pop-up menu from which you can
choose a track. If multiple objects are selected, this track is added as a slave
3238 | Chapter 15 Animation