Convenience: builds a WeatherEmitter and immediately adds its mesh to parent -- accepts either a Scene or an Object3D (they don't share a base class, only this add() shape).
WeatherEmitter
parent
Scene
Object3D
add()
Convenience: builds a
WeatherEmitterand immediately adds its mesh toparent-- accepts either aSceneor anObject3D(they don't share a base class, only thisadd()shape).