boxCollider.js

mesh.traverseAncestors(function (parent) {
    parent.updateMatrixWorld(true);
})

var worldScale = mesh.getWorldScale();
var worldRotation = mesh.getWorldQuaternion();

var boxWidth: json.userData.size[0] * worldScale.x;
var boxHeight: json.userData.size[1] * worldScale.y;
var boxDepth: json.userData.size[2] * worldScale.z;

var offset: (new THREE.Vector3()).fromArray(json.userData.center)
    .multiply(worldScale)
    .applyQuaternion(worldRotation);