mylingo3d/src/display/utils/getActualScale.ts

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

import { Vector3 } from "three"
import { onAfterRender } from "../../events/onAfterRender"
import MeshItem from "../core/MeshItem"

const cache = new WeakMap<MeshItem, Vector3>()

export default (target: MeshItem) => {
    if (cache.has(target)) return cache.get(target)!.clone()

    const result = target.nativeObject3d.scale
        .clone()
        .multiply(target.outerObject3d.scale)

    cache.set(target, result.clone())
    onAfterRender(() => cache.delete(target), true)

    return result
}