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Gravity: one potential per zone owns acceleration and height

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GravityField is the law of one well (logarithmic tail, softened core).
Zone.GetForce and GetHeight sum it over the bodies; GetNormal derives from
the force for ship tilt; Flow and Ship read GetForce. Well strength, core
radius and Roche limit are PlanetSettings curves of mass, height
exaggeration K one global. Deletes GravityAcceleration, GravityReferenceRate,
GravityStrength, the PowerPulse well, GetNormal's finite differences and
BodyData.GravityDepthExponent. Settings.asset carries the calibrated curves.
Tests: PotentialOwnerTests, the moon's moon placement, retired keys over every
BodyData type, a body-derived giant sweep. Not yet built or run (verify job
follows); this commit may not build.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-10-15 04:36:28 +02:00
commit 021c4cbcbf
16 changed files with 433 additions and 171 deletions
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12
Assets/Scripts/ServerShared/Settings.cs
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@ -17,11 +17,21 @@ public class PlanetSettings
public ExponentialCurve GravityRadius;
public ExponentialCurve LightRadius;
public ExponentialCurve BodyRadius;
// The closest a child may orbit its parent, in u, by the parent's mass. Authored like BodyRadius, never per body.
public ExponentialCurve RocheLimit = new ExponentialCurve();
// A body's well, by its mass (GravityField): its strength c in u^2/s^2 (the pull is c / r beyond the core) and its
// softened core radius in u, which must stay inside the RocheLimit curve.
public ExponentialCurve WellStrength = new ExponentialCurve();
public ExponentialCurve CoreRadius = new ExponentialCurve();
// The one global exaggeration of gravity height: height = potential / K, in u/s^2 per unit of height.
public float HeightExaggeration = 1f;
public float AsteroidVerticalOffset = -5f;
public ExponentialLerp AsteroidSize;
public ExponentialLerp AsteroidHitpoints;
public ExponentialLerp AsteroidRespawnTime;
public float GravityStrength;
public float SecureAreaRadiusMultiplier = .45f;
public ExponentialCurve OrbitPeriod;