supportclass/ae-ease-to-gsap-customease

Converts the keyframes of the selected property in After Effects to a set of SVG path commands that can be used directly in GreenSock's CustomEase plugin

ae-ease-to-gsap-customease's Issues

Doesn't work with eases that curve up and to the right.

Example ease that causes the failure:

Explanation

SVG's y-coordinates are inverted from AE's. Turns out that in writing this script, I only tested with ease curves that go down and to the right, which winds up being what GSAP's CustomEase expects.

When the ease goes up and to the right, the resulting SVG is the opposite, and CustomEase winds up assuming that we're trying to do something wacky and gives us a normalized output that we don't want.

Solution

This script needs to handle normalizing the SVG path data into a coordinate space and orientation that will always be what CustomEase expects.

More info: https://greensock.com/forums/topic/16271-customease-might-not-be-properly-normalizing-svg-path-data/#entry71667

Detect when an ease curve is identical to a stock GSAP ease

If a given ease curve is identical (or perhaps very close) to any of the stock GSAP eases, the script should detect that and notify the user. CustomEases can be expensive to instantiate, and using a stock ease such as Power3.easeOut or Back.easeInOut or what-have-you will be more performant and easier to maintain.

Use eslint-config-aftereffects

Thanks to @runegan for the heads up!

https://www.npmjs.com/package/eslint-config-aftereffects

Tests

Given that this is a functional library that takes input and generates consistent output, tests can be written for it.

The tricky part will be writing a test harness that shims/mocks all the ExtendScript globals. Perhaps this work has already been done somewhere else?

Only run on selected keyframes

Currently, the script will always run on all keyframes for the selected property (or properties). It would be nice if the script only looked at the specific keyframes that the user currently has selected.

the curve points are wrong from the script

when I use the script ,the result are 3 dimensions .so i don't know how to resove it.