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Station and belt kinds are seeded: the pick hashes the zone seed and the place in generation order, not a minted key

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Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
soul 2026-10-23 01:21:02 +02:00
commit 37a8110907
6 changed files with 54 additions and 40 deletions
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13
Assets/Scripts/ServerShared/ZoneData.cs
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@ -134,10 +134,11 @@ public class FieldKindData
// Mining Cut 3 (Q16 B): the one owner of which kind a belt is.
public static class FieldKinds
{
// A weighted pick among the catalog's kinds, by a stable hash of the belt's key: the same belt and the same
// catalog always give the same kind. Kinds are ordered by key so the pick does not depend on store order.
// A weighted pick among the catalog's kinds, by a stable hash of the belt's site: the same site and the same
// catalog always give the same kind. Generation names a belt by the zone's seed and the belt's place in generation
// order (never by the key the cache mints, which differs every run); a belt saved without a kind is named by its key. Kinds are ordered by key so the pick does not depend on store order.
// Unset when the catalog has no kind with positive weight.
public static CultRecordRef<FieldKindData> Assign(CultRecordKey field, CultCache catalog)
public static CultRecordRef<FieldKindData> Assign(string site, CultCache catalog)
{
var kinds = catalog.GetAll<FieldKindData>()
.Where(kind => kind.GenerationWeight > 0f)
@ -146,7 +147,7 @@ public static class FieldKinds
.ToArray();
if (kinds.Length == 0) return default;
var pick = field.Value.StableHash() / 4294967296.0 * kinds.Sum(kind => (double) kind.Weight);
var pick = site.StableHash() / 4294967296.0 * kinds.Sum(kind => (double) kind.Weight);
foreach (var kind in kinds)
{
if (pick < kind.Weight) return new CultRecordRef<FieldKindData>(kind.Key);
@ -157,10 +158,10 @@ public static class FieldKinds
// Gives a belt with no kind its kind and saves it; a belt that has one keeps it, whatever the catalog now says.
// Generation (ZoneGenerator) and first load (Zone) both call this, so there is one assignment rule.
public static void Ensure(CultRecordKey field, AsteroidBeltData belt, CultCache cache)
public static void Ensure(string site, AsteroidBeltData belt, CultCache cache)
{
if (belt.Kind.IsSet()) return;
belt.Kind = Assign(field, cache);
belt.Kind = Assign(site, cache);
if (belt.Kind.IsSet()) cache.Upsert(belt);
}
}