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feat(core): UCG Stage 1 — ObjCell base + CellPortal

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Introduces AcDream.Core.World.Cells namespace with the two foundational
types for the Unified Cell Graph. CellPortal is a readonly struct
unifying the three legacy portal representations; ObjCell is the abstract
base for all traversable cells with the retail id-magnitude IsEnv
discriminator (CObjCell::GetVisible, pseudo_c:308215). Zero consumers;
zero behavior change. 5/5 tests green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-06-02 08:51:55 +02:00
parent bd0244f203
commit 9cb15710be
3 changed files with 111 additions and 0 deletions
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36
tests/AcDream.Core.Tests/World/Cells/ObjCellBaseTests.cs Normal file
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using System.Numerics;
using AcDream.Core.World.Cells;
using Xunit;
namespace AcDream.Core.Tests.World.Cells;
public class ObjCellBaseTests
{
private sealed class StubCell : ObjCell
{
public StubCell(uint id)
: base(id, Matrix4x4.Identity, Matrix4x4.Identity,
Vector3.Zero, Vector3.One,
System.Array.Empty<CellPortal>(), System.Array.Empty<uint>(), false) { }
public override bool PointInCell(Vector3 worldPoint) => false;
}
[Theory]
[InlineData(0xA9B40174u, true)]
[InlineData(0xA9B40005u, false)]
[InlineData(0xA9B40100u, true)]
[InlineData(0xA9B400FFu, false)]
public void IsEnv_DispatchesByLow16Magnitude(uint id, bool expected)
=> Assert.Equal(expected, new StubCell(id).IsEnv);
[Fact]
public void Ctor_StoresBaseProperties()
{
var c = new StubCell(0xA9B40174u);
Assert.Equal(0xA9B40174u, c.Id);
Assert.Equal(Vector3.One, c.LocalBoundsMax);
Assert.Empty(c.Portals);
Assert.Empty(c.StabList);
Assert.False(c.SeenOutside);
}
}