GameCult/Aetheria
Watch
9
0
Fork
You've already forked Aetheria
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

FloatingBodyTests: pin Ship.Update's gravity line through a real ship in a real well

Browse source 
Ship at +x in an empty zone with a slope: velocity after Update(delta) equals the
3035230b ship law scaled by delta * 60, at 1/60 and 1/30. Fails on `-=` and on a
changed delta factor.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-10-07 18:49:20 +02:00
commit 6299627b72
1 changed files with 52 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

52
tests/Aetheria.Shared.Tests/FloatingBodyTests.cs
View file

@ -212,4 +212,56 @@ public sealed class FloatingBodyTests : IDisposable
}
}
// Ship.Update's own gravity line, through the real ship and a real zone (no planets: the zone's well alone
// gives a slope). The expectation is built from the zone's own normal and the 3035230b ship law, so flipping
// the sign or changing how delta enters the line fails here, not only the Zone function's pin above.
private Ship ShipAt(float x, out Zone zone)
{
var cache = AetheriaStores.Open(Path.Combine(_root, Guid.NewGuid().ToString("N") + ".cc"), catalogWritable: true);
_caches.Add(cache);
var hullShape = new Shape(5, 5);
foreach (var cell in hullShape.AllCoordinates) hullShape[cell] = true;
cache.Upsert(new HullData { Name = "Skiff", HullType = HullType.Ship, Shape = hullShape, Durability = 10, Mass = 1000 });
cache.FlushAsync().Wait();
var settings = new GameplaySettings
{
DefaultEntitySettings = new EntitySettings(),
Tiers = new[] { new RarityTier { Name = "Common", Quality = .5f, Rarity = 0, Color = new float3(1, 1, 1) } },
QualityPriceModifier = new ExponentialLerp()
};
var items = new ItemManager(cache, new ProvenanceLedger(), settings, _ => { });
var planets = new PlanetSettings { ZoneDepth = 1000, ZoneDepthExponent = 1, GravityStrength = 1 };
zone = new Zone(items, planets, new ZonePack { Radius = 1000 }, new GalaxyZone { Name = "Test Zone", Owner = null }, null);
var design = cache.GetByName<HullData>("Skiff");
var hull = new EquippableItem
{
Data = cache.RefOf<ItemData>(design), Durability = design.Durability,
Lot = items.Lots.Add(new Lot { Design = cache.RefOf<ItemData>(design), Origin = new Attributed(), Quality = .5f, Roles = new List<RoleFill>() })
};
var ship = new Ship(items, zone, hull, new EntitySettings());
zone.Entities.Add(ship);
ship.LookDirection = float3(0, 0, 1);
ship.Activate();
ship.Position = float3(x, 0, 0);
return ship;
}
[Fact]
public void AShipInAWellIsPulledTowardItByTheLawPerSecond()
{
foreach (var delta in new[] { 1f / 60f, 1f / 30f })
{
var ship = ShipAt(400f, out var zone);
var normal = zone.GetNormal(ship.Position.xz);
var push = LegacyPushPerFrame(new float2(normal.x, normal.z), zone.Settings.GravityStrength) * (delta * 60f);
Assert.True(push.x < 0f, "the well must pull a ship at +x toward the centre");
ship.Update(delta);
var tolerance = Math.Max(1e-6f, length(push) * 1e-4f);
Assert.InRange(ship.Velocity.x, push.x - tolerance, push.x + tolerance);
Assert.InRange(ship.Velocity.y, push.y - tolerance, push.y + tolerance);
}
}
}