1488ec62b7
Per Phase A.5 spec §4.9.3 audit: opaque + ClipMap pass uses DepthMask(true); AlphaBlend / Additive / InvAlpha pass uses DepthMask(false), restored after. Audit confirmed correct in WbDrawDispatcher.Draw. IsOpaquePublic shim already present. Add WbDispatcherDepthMaskTests: 5-case Theory that pins the partition so future regressions surface immediately. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
39 lines
1.6 KiB
C#
39 lines
1.6 KiB
C#
using AcDream.App.Rendering.Wb;
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using AcDream.Core.Meshing;
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using Xunit;
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namespace AcDream.Core.Tests.Rendering.Wb;
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/// <summary>
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/// A.5 T21: lock in the depth-write attribution per translucency kind.
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/// <para>
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/// <c>WbDrawDispatcher.Draw</c> uses a two-pass structure:
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/// <list type="bullet">
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/// <item>Opaque pass — <c>DepthMask(true)</c>: writes depth so that
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/// later transparent geometry sorts correctly against solid surfaces.</item>
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/// <item>Transparent pass — <c>DepthMask(false)</c>: reads depth but
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/// does NOT write it, so alpha-blended surfaces don't occlude each
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/// other by Z-fighting.</item>
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/// </list>
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/// The partition that decides which pass a batch enters is
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/// <see cref="WbDrawDispatcher.IsOpaquePublic"/>:
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/// <c>Opaque</c> and <c>ClipMap</c> go to the opaque pass (depth write);
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/// <c>AlphaBlend</c>, <c>Additive</c>, <c>InvAlpha</c> go to the
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/// transparent pass (no depth write).
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/// </para>
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/// </summary>
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public sealed class WbDispatcherDepthMaskTests
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{
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[Theory]
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[InlineData(TranslucencyKind.Opaque, true)] // opaque pass — depth write
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[InlineData(TranslucencyKind.ClipMap, true)] // foliage — depth write (binary alpha / A2C)
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[InlineData(TranslucencyKind.AlphaBlend, false)] // transparent — no depth write
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[InlineData(TranslucencyKind.Additive, false)]
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[InlineData(TranslucencyKind.InvAlpha, false)]
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public void IsOpaquePartition_ImpliesDepthWriteAttribution(
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TranslucencyKind kind, bool expectsDepthWrite)
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{
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bool isOpaque = WbDrawDispatcher.IsOpaquePublic(kind);
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Assert.Equal(expectsDepthWrite, isOpaque);
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}
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}
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