Adobe After Effects CS4 Bedienungsanleitung PDF herunterladen (Seite 377)

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USING AFTER EFFECTS CS4

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Last updated 12/21/2009

“Text selectors” on page 358

“Set or add keyframes” on page 214

“Preview video and audio” on page 195

Example: Animate text position with expressions

This example uses the textIndex and textTotal attributes with the wiggle expression to animate a line of text.

1 Create a new composition.

2 Create a new text layer.

3 Expand the text layer in the Timeline panel to view the text properties. Add a Position animator group from the

Animate menu.

4 Delete the default Range selector, Range Selector 1.

5 Add an Expression selector by selecting the Add menu, then choosing Selector > Expression. Expand the

Expression selector to reveal its options.

6 Expand the Amount property to reveal the expression. The following expression appears by default:

selectorValue * textIndex/textTotal

7 Replace the default expression with the following expression:

seedRandom(textIndex);

amount=linear(time, 0, 5, 200*textIndex/textTotal, 0);

wiggle(1, amount);

The linear method is used in this example to ramp down the maximum wiggle amount over time.

8 Set the vertical position value. The greater the value, the more the characters wiggle.

9 Preview your composition.

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