I am kind of a Houdini newbie struggling through one of my first technical projects. Almost there.

I have a collection of primitives generated by find shortest path.
Points in my scene reference these primitive paths with an @sourceprim attribute.
Each points @sourceprim attribute changes from time to time so it is not static.
The number of points with an @sourceprim reference also changes.

I need add the primitives referenced by each points @sourceprim to a group and remove the ones no longer referenced.

I know how to add the primitives to a group with vex but am getting hung up on how to reference the primitive via the point attribute and then add that to a primitive group.

Hope that makes sense
Any suggestions much appreciated


Jeff

Primitive Wrangle
first input your prims
second input your points with @sourceprim attrib that matches primnum in first input

however if you are gonna be deleting it in a solver then your primmnum will not match sourceprim anymore since after each delete it will change
so you can store sourceprim attrib on prims as well before any deleting happen and then use that to lookup the points

if you just want to reference the primitive via points , you can use attribute promote node

home run! - thank you Tomas

What about making unique primitives with a facet or fuse and promoting the area attrib to points? Then you could run this through a vopsop.