A skin_binding defines the offsets and weights that relate a skin (geometry) to a skeleton (a collection of nodes).
| Name | Description | Default | Required | 
|---|---|---|---|
| node | A string representing the URI of the root node to bind to. | None | yes | 
| geometry | A string representing the URI of the geometry to bind. | None | yes | 
| vertex_count | An int representing the number of vertices expected in the mesh geometry. | 0 | yes | 
| joints | An array of weighted_joint objects defining the binding. | None | no | 
| selection_sets | A named_string_map that provides a one to one mapping from face groups to nodes. | None | no | 
{
    "node" : "#hips",
    "geometry" : "#speedy",
    "vertex_count" : 2045,
    "joints" :
    [
        weighted_joint,
        weighted_joint
        ...
    ],
    "selection_sets" :
    [
        named_string_map,
        named_string_map,
        named_string_map
        ...
    ]
}