Long question short: Changing Minecraft's Gravity via Code: StackOverflow, Math, Physics, or SciFi&Fantasy?
So, some quick background on the question I want to answer. The Minecraft world is generally depicted as a large cube (which, of course, doesn't make physical sense anyway, concentration of mass and all that), but, assuming it is a cube, I want to write a modification that employs accurate gravity. It does not need to be a perfect model, Newtonian is fine, furthermore, I have to apply force vectors as well as cancel out minecraft's preexisting gravity, which is a bit odd.
So, as you can see, I'm quite split. I am writing code to implement physics, using math in a fantasy world. So, what site do I use? I get the feeling it would be on topic here, since I am trying to be accurate to real-world physics, but then is the question of how to cancel the preexisting gravity also on-topic? I don't have any specific difficulties with the code, as I'm fairly well-versed, so I assume stack overflow is a no go, furthermore, there are too many other parts to my question for it to fit on math, and I see nothing in SciFi&Fantasy's on-topic guidelines that match this question, so that only leaves physic, but the on-topic page for physics specifically states that made-up physics is off-topic. I, however, want to apply real physics to a made-up world... would that make this on-topic?
Anyway, I just wanted to make sure what I'm asking is allowed... maybe there's another site this would be even more suited for. Regardless, any help is appreciated!