Animating Keyframes >

# 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.

#### Topics in this section

- Working with Expressions in the Channel Editor
- Expression Content
- Vectors
- Functions
- Keywords and Constants
- Simplified Expressions
- Operator Reference
- Function Reference
- Defining Your Own Functions
- Sample Expression Setups