Problematic json export of SphereGeometry

Description of the problem

Consider this code :

let g = new THREE.SphereGeometry(1,2,2)
let t = new THREE.Matrix4().makeTranslation(100,0,0)
g.applyMatrix( t )
let jsg = g.toJSON();

We can see the transformation correctly affects the geometry vertices :

console.log( g.vertices.map( v => v.x ) ) 
//  [ 100, 99, 100.5, 100.5, 100 ]

But if we export as json :

console.log( JSON.stringify( jsg ) )

// {
//   "metadata": {
//     "version": 4.5,
//     "type": "Geometry",
//     "generator": "Geometry.toJSON"
//   },
//   "uuid": "5D17605B-7519-4DED-91AC-255C33AE1A9C",
//   "type": "SphereGeometry",
//   "radius": 1,
//   "widthSegments": 2,
//   "heightSegments": 2
// }

I would expect the transformation to be applied to the geometry when exporting to json ; the geometry would be described as vertices/faces.

I am doing something wrong ?

Thanks.

Three.js version

• r87

Browser

• All of them
• [] Chrome
• [] Firefox
• [] Internet Explorer

OS

• All of them
• Windows
• macOS
• Linux
• Android
• iOS

Hardware Requirements (graphics card, VR Device, …)