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Zone.PopulatedRadius: the extent of the populated area, owned by the zone

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The largest over bodies of the root orbit's offset from the origin, every orbit Distance
along the chain, and the body's Roche limit: a static bound on where any body can be,
computed once at construction and independent of Pack.Radius. Presenters read it.
Builds; the Unity side follows in the next commit.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-10-16 04:13:43 +02:00
commit ecb165624d
2 changed files with 147 additions and 0 deletions
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25
Assets/Scripts/ServerShared/Zone.cs
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@ -211,6 +211,8 @@ public class Zone
belt.Value.Periods[i] = PeriodAround(beltParent, belt.Value.Data.Asteroids[i].Distance, beltOrbit);
}
PopulatedRadius = ComputePopulatedRadius();
// Aetheria gravity (target invariant zone-valid-before-tick): every orbit is placed at the pack's time
// when the zone is built, so each well, light and body pose read before the first Update is where the
// body is. Velocity stays zero until the first Update differences two placed positions.
@ -736,6 +738,29 @@ public class Zone
// reference. GetHeight sums with it and the renderer's lowering (GravityLowering) hands it to the shader unchanged.
public float WellReference(Planet body) => GravityField.Potential(body.WellStrength, body.RocheLimit, Pack.Radius);
// The extent of the populated area, from the zone's origin: owned here; presenters read it, nothing authors it. A static
// bound on where any body can be, so it holds at every time and reads nothing the pack's Radius decides: for each body,
// the root orbit's offset from the origin, plus every orbit Distance along its chain to the root, plus its Roche limit.
public float PopulatedRadius { get; }
private float ComputePopulatedRadius()
{
var radius = 0f;
foreach (var body in PlanetInstances.Values)
{
var reach = body.RocheLimit;
var key = body.BodyData.Orbit.Key;
while (key.IsSet() && Orbits.TryGetValue(key, out var orbit))
{
if (orbit.Data.Parent.IsSet()) reach += orbit.Data.Distance;
else reach += length(orbit.Data.FixedPosition);
key = orbit.Data.Parent.Key;
}
radius = max(radius, reach);
}
return radius;
}
public float GetHeight(float2 position) => GetHeight(position, _time);
// The field at a time: each well sits where its body's rail puts it then. The sim reads it at _time, a presenter at