What the simulation needs to know about a frame in order to fly in it.
The frame graph deliberately knows nothing about mass or atmospheres, and the universe package deliberately knows nothing about ships. This is the join: one lookup table, built when a system is loaded, that answers "if an entity is in this frame, what is pulling on it and where can it go next".
simulation/src/binding.ts:25Members
atmospherereadonly
bodyreadonly
framereadonly
maxSpeedreadonly
The fastest this frame's origin ever moves relative to its parent, m/s — the periapsis speed of its orbit, or 0 for a frame that is pinned.
What a sphere-of-influence check is skipped against. An entity a gap of
g meters outside a body's reach cannot be inside it for at least
g / (its own speed bound + this) seconds, by the triangle inequality, and
that bound is what turns sixty-six Kepler solves a tick into none.
mureadonly
Gravitational parameter of the mass at this frame's origin.
parentreadonly
radiusreadonly
Radius of the attracting body, 0 for a system barycenter.
sphereOfInfluencereadonly
Beyond this the entity is no longer bound here. Infinity for a system.
spinFramereadonly
Rotating frame of the same body, where one exists.