What is the best approach for Directional Gravity and AI Navigation on rotating platforms

Hi there,

I’m using the Unreal Engine since 4.4 version. Now I am facing a great challenge. I have to create a system that will support directional gravity and also work perfectly with the AI navigation system. Modifying the engine’s source code is not a problem. Looking for a C++ solution, not Blueprint.

Worst case scenario that must be supported:

  • Players fight onboard a large
    spaceship against enemy AI agents,
    using grenades, ranged weapons, laser
    rifles etc.
  • In most cases said spaceship will move and rotate, and won’t be static
  • The spaceship will substitute the entire level from the player’s
    perspective, the persistent level
    will have only space background
    effects, procedurally generated
    asteroid fields and sometimes a
    background star or planet, thus the
    spaceships are 95% of the gameplay
  • There will be more such spaceships with interiors, fighting each other
  • Gravity will be generated by spaceship’s gravity engine, gravity
    fields will be tied to spaceship’s
    rotation, and must be handled
    properly by AI agents, too
  • In a zero-gravity environment, players may turn on their spacesuit’s
    boosters to move or rotate freely
  • This solution must work decently on a procedurally generated spherical
    planets - voxel landscapes
  • Number of enemy AI agents will not exceed 30 at a time
  • Must work with networking, client-side glitches must be avoided

As far as I know, this is not supported by Unreal Engine by default. I will have to implement it on my own, I guess. Directional gravity for players and rigid bodies itself is trivial to implement, the problem is - it must work properly with AI and networking, and that’s my question here. How to handle that properly? I’ve googled it already with no luck. All I find is a directional gravity, without AI navmesh advice. Navmesh was designed for fixed Z-gravity and static levels. Should I use it, modify it or seek different solutions?

Thank you!