Function ensureEnvAtlasFromCube

ensureEnvAtlasFromCube(
    cube: BaseTexture,
    scene: Scene,
    onReady: (atlas: Texture) => void,
): Texture
Ensures a 3×2 env atlas exists for a CubeTexture. Returns a cached atlas synchronously when available; otherwise starts (or joins) an async build and invokes onReady when the atlas is usable.
Parameters
- cube: BaseTexture
- scene: Scene
- onReady: (atlas: Texture) => void
Returns Texture
- Defined in packages/babylon.quarks/src/envAtlas.ts:70