[Marcus Round]

have a look at this file, hope it helps

https://f1.creativecow.net/12368/rickshawarm

note that the layers are not actually parented.

[Marcus Round]

After Effects will not allow you to copy and paste keyframes across multiple layers at the same time.

To do that you need a script, such as this one:
https://aescripts.com/paste-multiple-keyframes/

[Marcus Round]

Thanks Dan,

But I’m not sure I was clear. If I’m reading your code correctly, each expression will output a single number (either the x or y co-ordinate of a point), but I am looking to pick two different points.

After tinkering around, from what I can find the problem with my original code is perhaps to do with the use of arrays in conditional statements.
I tried paring it down to its simplest essence: I made a text layer, and added a point control to the text layer. In the source text, I put this code:

if(effect("Point Control")("Point")==[600,600]){"true"}else{"false"}

Which seems fairly straight-forward, but the point control is set to 600,600 and it still evaluates to “false”. Am I doing something wrong?

In my original code, I am checking if “start” and “end” are equal, and both are arrays.

[Marcus Round]

color = content("Rectangle 1").content("Fill 1").color;

if (rgbToHsl(color)[2] < 0.5) -50 else 50

it converts the Red/Green/Blue values to Hue/Saturation/Lightness and returns a value of -50 or 50 depending whether the Lightness is lesser or greater than 0.5

[Marcus Round]

Thank you both.

[Marcus Round]

Thanks Dan, you’re the man.