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Gravity: a parent's outermost child never hosts a lane (ruling lane-not-outermost); one host filter, an only child pinned

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
soul 2026-10-22 00:44:35 +02:00
commit 74257926b1
3 changed files with 33 additions and 8 deletions
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12
Assets/Scripts/ServerShared/ZoneGenerator.cs
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@ -254,8 +254,7 @@ public static class ZoneGenerator
{
if (laneRandom.NextFloat() >= zoneSettings.LaneProbability) continue;
var lane = zoneSettings.LaneBodyRadii * planetSettings.BodyRadius.Evaluate(host.Mass);
if (swarmHosts.Contains(host) || shaped.Contains(host.Parent)
|| host.SlotInner > host.Distance - 2 * lane || host.SlotOuter < host.Distance + 2 * lane) continue;
if (swarmHosts.Contains(host) || shaped.Contains(host.Parent) || !LaneHost(host, lane)) continue;
shaped.Add(host.Parent);
var hostOrbit = orbitMap[host];
var rail = new OrbitData { Parent = hostOrbit.Parent, Distance = hostOrbit.Distance, Phase = hostOrbit.Phase };
@ -672,6 +671,15 @@ public static class ZoneGenerator
private const uint LaneStream = 0x85EBCA6Bu;
// Whether a placed body can carry a lane of half-width `lane`: its slot holds a band at least that wide on both sides
// (ruling lanes-two-sided-visual-margin), and it is not its parent's outermost child (ruling lane-not-outermost). Place
// stretches the chain to the window, so an outermost child's outer side is the window, not a sibling's spacing; a lane's outer
// band there would reach past every sibling's extent and raise its parent's support, and lanes move nothing else in the zone.
// An only child is its parent's outermost.
public static bool LaneHost(GeneratorPlanet host, float lane) =>
host.Parent.Children.Any(c => c.Distance > host.Distance)
&& host.SlotInner <= host.Distance - 2 * lane && host.SlotOuter >= host.Distance + 2 * lane;
// A laned belt's rocks: the count an annulus of the host's mass at `distance` would draw, over the bands [inner, distance - lane]
// and [distance + lane, outer], each rock in a band by its area and drawn across it as the annulus draws across its width.
public static Asteroid[] LaneRocks(ZoneGenerationSettings settings, ref Random random, float mass, float distance, float lane, float inner, float outer)