2017

Table Of Contents
Advanced Animation: About Expressions
Use expressions to apply animation dynamically to one or more channels. For example, use expressions to
easily simulate real-world forces such as gravity, momentum, and centrifugal force. Expressions save time
since you can animate one channel, and then refer other channels to the first channel so that the other
channels automatically behave in relation to the first one. You can use arithmetic operators, such as addition
and multiplication, as well as predefined functions to precisely control the behaviour of an animation.
Expressions are available through all modules that use the Channel Editor.
Working with Expressions in the Channel Editor
You can apply, modify and view expressions using the Channel Editor. You can use the copy and link
functionality to quickly apply basic expressions to multiple channels.
WARNING Expressions override interpolation modes and previously set keyframes for a selected channel.
To apply an expression to a channel:
1 In any module menu, click Animation.
The Animation controls appear.
(a) Channel View box (b) Reset Channel button (c) Expressions button
2 From the Channel View box, select Info.
Channel information appears in a tabular grid for easier viewing of expressions and channel details.
From Info view, you can click the Expressions column heading to sort by expressions and view them
more easily.
1240 | Chapter 24 Animating Keyframes