That's my basic question. i tried set the parent to be the Person in the Custom Unity Asset /Control , there is a Section Parent Atom, and i selected the Person but the Hairpin/clip is not attached and following the head
To add on what Geraldo says, you can't parent to vertices, only "nodes/sockets".
Stopper has a plugin for that, but it can get quite expensive if you have a lot of them:
This plugin sets an object's position to a vertex on a person atom's skin, clothing, or hair. It needs to load the vertex positions from GPU buffers, which is slow. Expect performance to suffer to some degree (especially if using multiple)...
"Parent Atom" is a setting mostly used for SubScenes, when you want that atom to exist only if the Parent Atom is on the scene as well, and has nothing to do with the movement of your character.
For that, you select the CUA you want, go to Control. Then Select Link To From Scene, choose the Person Atom you want and Link To "head", and not "headControl". In the menu below, set Position and Rotation to "Parent Link".
Please keep in mind that the CUA will be "floaty", like it's only following the Person's head and not properly attached. To fix that you'll want to use this plugin loaded in scene/session to make sure the CUA is fixed to the head.
To add on what Geraldo says, you can't parent to vertices, only "nodes/sockets".
Stopper has a plugin for that, but it can get quite expensive if you have a lot of them:
This plugin sets an object's position to a vertex on a person atom's skin, clothing, or hair. It needs to load the vertex positions from GPU buffers, which is slow. Expect performance to suffer to some degree (especially if using multiple)...