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feat(phys): UpdatePosition handles multi-part entities

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Multi-part entities cached via RegisterMultiPart's _entityShapes now
recompose all part transforms on UpdatePosition (called when the server
broadcasts UpdatePosition (0xF748) for a moving entity). Legacy
single-shape path preserved unchanged for tests + entities that never
went through RegisterMultiPart.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-05-24 15:21:35 +02:00
parent fca0a13217
commit d5ffb0331b
2 changed files with 63 additions and 5 deletions
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32
tests/AcDream.Core.Tests/Physics/ShadowObjectRegistryMultiPartTests.cs
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@ -161,4 +161,36 @@ public class ShadowObjectRegistryMultiPartTests
Assert.Single(reg.GetObjectsInCell(LbId | 1u),
e => e.EntityId == 42u);
}
[Fact]
public void UpdatePosition_MovesAllPartsWithEntity()
{
var reg = new ShadowObjectRegistry();
const uint movingEntityId = 0xA1u;
var shapes = new[]
{
new ShadowShape(0u, new Vector3(0f, 0f, 0f), Quaternion.Identity, 1f,
ShadowCollisionType.Cylinder, 0.5f, 1f),
new ShadowShape(0u, new Vector3(1f, 0f, 0f), Quaternion.Identity, 1f,
ShadowCollisionType.Cylinder, 0.5f, 1f),
};
reg.RegisterMultiPart(movingEntityId, new Vector3(10f, 10f, 50f),
Quaternion.Identity, shapes, 0u,
EntityCollisionFlags.None, OffX, OffY, LbId);
// Move entity to (50, 10, 50). Parts should be at (50, 10, 50) and (51, 10, 50).
reg.UpdatePosition(movingEntityId,
new Vector3(50f, 10f, 50f), Quaternion.Identity,
OffX, OffY, LbId);
Vector3 expectedPart0 = new(50f, 10f, 50f);
Vector3 expectedPart1 = new(51f, 10f, 50f);
var atNew = reg.AllEntriesForDebug().Where(e => e.EntityId == movingEntityId).ToList();
Assert.Equal(2, atNew.Count);
bool found0 = atNew.Any(e => Vector3.Distance(e.Position, expectedPart0) < 0.01f);
bool found1 = atNew.Any(e => Vector3.Distance(e.Position, expectedPart1) < 0.01f);
Assert.True(found0 && found1,
"Expected both parts at new world positions (50, 10, 50) and (51, 10, 50)");
}
}