2011

Setting Expressions Examples
The following examples will show you some of the ways expressions can be
used to save time in building your animations. You can create an expression
for one channel and use the same expression for other channels so that the
other channels automatically behave in relation to the first one.
Example: Using Linked Attributes to Drive Animation
This example consists of a simple animation where the Photo Lab red channel
Gain attribute drives the Radial Ramp tool's Y Center attribute—see
Setting
Keys Manually
on page 676, Radial Ramp Tool on page 426, and Processing
Images with Photo Lab
on page 646.
NOTE It is assumed that you currently have the Player, Schematic, and Composition
Browsers open. With the focus on Schematic, use Ctrl + N (Windows and Linux)
or Cmd + N (Mac OS) to create a new composition.
To create an animation where the Photo Lab's red channel Gain attribute
drives the Radial Ramp's Y Center position attribute:
1 From the Tools tab, drag the Radial Ramp tool from the Image Generation
folder to the dependency graph in the Schematic view.
2 Drag the Photo Lab tool from the Color Correction folder to Schematic
and place it after the Radial Ramp tool.
The dependency graph should look like this.
3
4 In the Player controls, change the composition's total number of frames
to 100.
Setting Expressions Examples | 733