xrfragment/src/3rd/js/three/util/collision.js

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xrf.getCollisionMeshes = () => {
let meshes = []
xrf.scene.traverse( (n) => {
if( !n.userData.href && !n.userData.src && xrf.hasNoMaterial(n) ){
meshes.push(n)
}
})
return meshes
}