How to get prim id to scattered points based on matching id attribute?

[milstein.ben]

Hey,

I have a bunch of moving curves that appear and disappear (meaning the prim id keeps changing), and I scatter points on them which I'm using a solver to kill at the right time but therefore they become static and I want to use an attributeInterpolate to track the point back to their curve.

The problem is that the attributeInterpolate is asking for a sourceprim id but as I said above the the prim id keeps changing.

I was able to create a unique integer attribute for the primitives which then is inherited by the scattered points. how can I now get the prim id from the curves to the scattered points based on a matching attribute?

I tried an attribute wrangle but I'm really new to vex and this is what I wrote which doesn't really work haha.

i@sourceprim = int idtoprim(1, id);

first input is the points, second input is the curves.

Thanks 

Edited October 6, 2020 by milstein.ben