Unfolds a shape step by step to a straight line.

To animate a unfolding (or folding) of your paths, simply link the "completion" parameter to a slider and keyframe it from 0 to 100 (or 100 to 0).

With the "Gradually" parameter you can control is the entire shape should unfold at once or make the process directional and start the folding on one end of the path.

Examples

Example Notebook: unfold shape in After Effects with expressionExample Text: unfold shape in After Effects with expressionExample NY Skyline: unfold shape in After Effects with expressionExample Nulti Line Text: unfold shape in After Effects with expression

Unfold iExpression

can be applied to: 
paths
iExpression Bundle: 
Download at aescripts.com

What are iExpressions?

iExpressions are After Effects expressions with an easy to use interface.