What is the meaning of "weight" with drei sampler?

Questions
1

What is the meaning of “the name of the attribute to be used as sampling weight” which is the description of “weight” for drei sampler ? This lacks of simple example.

2

Note that drei’s <Sampler/> is a wrapper around THREE.MeshSurfaceSampler, which has documentation here:

3

Thank you. The code below doesn’t work because of the way nodes are loaded with <primitive…> How I must do that to place the sphere on the fbx object ?


const nodes = useFBX("/example.fbx");

...
return(
<Sampler
      // weight={"position"} // the name of the attribute to be used as sampling weight
      transform={transformInstance} // a function that transforms each instance given a sample. See the examples for more.
      count={16} // Number of samples
    >
<mesh>
<primitive object={nodes} scale={0.1} />
</mesh>
<mesh>
        <sphereGeometry args={[1]} />
        <meshStandardMaterial color="blue" wireframe />
      </mesh>
</Sampler>
4

For future readers, the discussion continues here: