9.5.2

1132 • CHAPTER 22
XPRESSO EDITOR • 1133
Set Driven Keys
Set driven keys provide an easy way to create object interactions without using the XPresso Editor
directly.
A set driven key is a relationship where one parameter controls another. For example, suppose you
want a door to open and close automatically as a character enters a room. The character’s position can
be used to control whether the door is open or closed. The object parameter that does the controlling
is the driver. The parameter that is being controlled is driven. Almost any kind of set-driven relationship
is possible, making it easy to manage complex motions or objects.
To create a set driven key:
 Decide which parameter is the driver and which parameter is driven (the
driver controls the driven parameter).
 Set the driver as follows:
 In the Object manager, select the object of the parameter that you want to
act as the driver.
 In the Attribute manager, right-click (Windows) or Command-click (Mac
OS) the name of the parameter that you want to act as the driver to open its
context menu.
 From the context menu, choose Animation > Set Driver to dene the
parameter as the driver.
 Set the driven parameter as follows:
 In the Object manager, select the object of the parameter that you want to
be driven.
 In the Attribute manager, right-click (Windows) or Command-click (Mac
OS) the name of the parameter that you want to be driven to open its context
menu.
 From the context menu, choose Animation > Set Driven (Absolute) to dene
the parameter as driven. An XPresso tag is added to the driven object in the
Object manager and the driver now controls the driven parameter.
When selecting the driver and driven parameters, you can click individual parameters or parameter
groups.