How to go back and forth between Object3D nodes and ROOT Geometry nodes?

[DraTeots]

This is a question rather than a bug and it relates to #303.

jsroot UI have a navigation between ROOT geometry tree and the resulting three.js objects made by TGeoPainter.mjs build function. Jsroot GUI have it here:

Following the screenshot, there are two questions:

1. If I have ROOT nodes path like /wold_volume/DIRC_0/DircModule_0 how I get it on Object3D
2. If I have THREE.js object (e.g. obtained by raytracing), how I can I calculate its root geo node path (as above)?

P.S. I saw there are clones in Object3d and clones array where elements have couple of different IDs but they kind of didn't match.

[linev]

After build() function one gets Object3D with clones assigned to the top element. It is ClonedNodes class which contains compressed description of geometry - see geobase.mjs

Each end element of Object3D hierarchy has custom stack member which identifies element in clones. For instance - get full name:

const fullname = clones.getStackName(obj3d.stack);

If you want access original TGeoNode object, one can do:

const info = clones.resolveStack(obj3d.stack);
console.log(`name ${info.name} obj ${info.obj}`);

If I have ROOT nodes path like /wold_volume/DIRC_0/DircModule_0 how I get it on Object3D

One can try to produce stack based by the name:

const stack = clones.findStackByName(fullname);

If it found - one can use it to select Object3D like:

const obj3d = clones.createObject3D(stack, toplevel); // returns last Object3D
const mesh = clones.createObject3D(stack, toplevel, 'mesh'); // returns Mesh instance assigned to Object3D

Be not confused by method name - it only create new instances if object as third argument is specified.

[linev]

I guess, question was clarified and can be closed