2009

Procedures
Example: To make the position of a sphere react to the position of a box:
This procedure shows an alternate way to use a Reaction controller. The
recommended workflow is to do most of the setup in the Reaction Manager
dialog: See
Example: To use the Reaction Manager dialog: on page 3229.
NOTE Objects don't need to be animated to use Reaction controllers. This
procedure starts with animation to make the reaction easier to see.
1 On the left side of the Top viewport, create a box about 30 units on a
side.
2 Animate the box from position (-100,0,0) at frame 0 to position (100,0,0)
frame 100.
3 In the Front viewport, create a sphere slightly above the box. Position
the sphere at (-100,0,50).
4
Go to the Motion panel, and on the Assign Controller rollout,
click the Position track to highlight it.
5
On the Assign Controller rollout, click the Assign Controller button.
6 On the Assign Position Controller dialog, click Position Reaction to
highlight it, and then click OK.
This opens the Reaction Manager dialog on page 3228. The Reactions list
shows that the sphere is assigned as a slave, but no master is assigned. A
Reaction controller uses a master's motion to control any number of
slaves.
7 Right-click the “Unassigned” line at the top of the Reactions list. From
the menu, choose Replace Master.
3224 | Chapter 15 Animation