021c4cbcbf
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>
22 lines
1.3 KiB
C#
22 lines
1.3 KiB
C#
using CultMath;
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using GameCult.Caching;
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// The one fixture that gives a test zone a slope: a body on a parentless orbit (the origin unless `at` says otherwise; call again for more bodies), with the
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// curves a body needs. Gravity is the sum of body wells (GravityField), so a test that wants ground to slide on
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// digs it here and nowhere else. `strength` is the well's c (u^2/s^2) and `coreRadius` its softened core in u; the
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// Roche limit curve sits at 2.5 cores so the body is a valid well.
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internal static class WellFixture
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{
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public static void Dig(CultCache cache, ZonePack pack, PlanetSettings settings, float strength, float coreRadius, float2 at = default)
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{
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settings.BodyRadius = new ExponentialCurve();
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settings.OrbitPeriod = new ExponentialCurve();
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settings.WellStrength = new ExponentialCurve { Constant = strength };
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settings.CoreRadius = new ExponentialCurve { Constant = coreRadius };
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settings.RocheLimit = new ExponentialCurve { Constant = 2.5f * coreRadius };
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var orbit = cache.Upsert(new OrbitData { FixedPosition = at }).Key;
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var body = cache.Upsert(new PlanetData { Name = $"Well {at.x},{at.y}", Orbit = new CultRecordRef<OrbitData>(orbit) }).Key;
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pack.Orbits.Add(new CultRecordRef<OrbitData>(orbit));
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pack.Planets.Add(new CultRecordRef<BodyData>(body));
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}
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}
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