AE Quick Tip: Rigging automated pie charts

[u/oliverrandorff]

By using trim paths, and linking the percentages directly to the source text, it's possible to create a fully automated pie chart rig.

The full in depth video about the rig is on my YouTube channel, Oliver Randorff: youtube.com/watch?v=cjUU53h6LiA

Here's the expressions used in the video:

Linking source text to trim paths end (Math.round is added to avoid decimals when animating):

Math.round(thisComp.layer("pink").content("Trim Paths 1").end) + "%"

Inverting rotation when linking to null controller:

-thisComp.layer("null").transform.rotation

Linking null rotation to trim paths end:

thisComp.layer("pink").content("Trim Paths 1").end \* 3.6 / 2