Hot loading C++ game code

Coincidentally, I've been digging deep into Filament over the past couple of weeks as a replacement for Unity (I just need 3D rendering without all the doo-dads that come with a full game engine). I'm guessing from the submitter's username that he actually works on Filament too.

The library is presented as a physically-based renderer, but call render() every 16ms and you've got 60fps rendering (provided your shaders/materials/etc aren't too heavy). It's not a drop-in replacement for general game rendering (e.g. I don't think there's LOD support) but if you know the constraints of your scene upfront then it's perfectly feasible (as the link shows).

There's also built-in support for gLTF animations (and manually animating bones/morph targets), which is what I'm doing. I assume you'd need to implement the logic yourself if you're using other model formats.