Script to generate a mask, and recompute it whenever needed

[jamesastro]

I'm working on a script that will generate a mask automatically, and rebuild the mask whenever the enclosing layer changes. For example, suppose my plugin generates a circular mask. I want it to recreate the mask whenver the layer size changes, so that my circular mask doesn't turn into a squished oval.

Do you know if there is a way for a plugin to be notified whenever a layer changes?

[Tomas Sinkunas]

Unfortunatelly, but AE does not provide any DOM listeners for scripts, i.e. there's no way for a script to know if anything changed in AE interface, without manually forcing your script to re-read the data.

Not sure about native C++ plugins though.

However, if it's a mask, why not use createPath() expression, that recalculates when layer size changes instead?

[jamesastro]

Interesting. I didn't know expressions could do that. It sounds like I need to learn more about expressions! Thanks for the tip.