Did this reuse Doom 3 physics engine code?

[Foebane72]

One thing I have noticed about Doom 2016 is how the physics of small objects like skulls and so forth behave very much the same way that Doom 3 did. In fact, it is almost identical in every way. Did they simply reuse the code? It wasn't perfect to begin with.

 

[MadGuy]

Well they used BFG code as a base (I guess).