Why design to pass scene as a parameter into the object's builder, rather than adding scene.add(obj) with scene like threejs?

Questions
1

Why design to pass scene as a parameter into the object’s builder, rather than adding scene.add(obj) with scene like threejs?

2

Hello and welcome!

First of all, one engine can run multiple scenes - Using Multiple Scenes | Babylon.js Documentation

3

Using scene.add(obj) can also support running multiple scenes；

4

No real reason other than requiring one line of code instead of two when creating an object.

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