mylingo3d/src/display/utils/measure.ts

Lingo3D is a React/Vue 3d game development framework that ships with a complete visual editor

import { Object3D, Vector3 } from "three"
import { box3 } from "./reusables"

const cache = new Map<string, Vector3>()

export default (gltf: Object3D, src: string) => {
    if (cache.has(src)) return cache.get(src)!

    const measuredSize = new Vector3()
    box3.setFromObject(gltf).getSize(measuredSize)
    Object.freeze(measuredSize)

    cache.set(src, measuredSize)
    return measuredSize
}