e65644cb33
The walk-order submission layer over the existing RHI (plan section FW2): - OrderedDrawStream: append-only walk-ordered draw commands (GroupKey + transform + per-instance data + WalkDrawStage + cell provenance), struct-of-arrays with one lockstep Reset (#193 shape). The PortalPunch stage exists but has no FW2 submission path - the submitter throws on it; punch emission lands with FW3 wiring. - WbDrawDispatcher.OrderedStream partial: per-instance-first emission (the deferred-alpha shape - command i owns instance i, walk order survives into the indirect array), each SSBO section written once, then one DrawIndirectRangeRhi call per maximal merge run. Runs are built by pure-CPU BuildOrderedMergeRuns and may never span a stage, pipeline-bucket, or cull boundary; ValidateMergeRun re-checks every emitted run and throws (the campaign fail-loud rule). Nothing is sorted, reordered, or dropped: N commands in, N indirect commands out, covered exactly once. - WorldDepthContract: retail world depth verified verbatim from the decomp - Render::zfuncVal @0x00820e1c = 0x2, SetDepthBufferMode @0x005a2d10 writes the enum directly as D3DRS_ZFUNC so the value IS D3DCMP_LESS, applied by the surface-state applier @0x0059c80a with Z-write toggled by blend; the LESSEQUAL sites are GameSky::Draw-local. Seven world pipeline sites now cite the named constant (no value changes). - Plan updated: FW1 status block + gate amendment (the ten pose-stamped retail traces supersede re-expressing the old-builder replay fixtures; those retire with the old builder at FW4 and their scenario classes re-verify at the FW3/FW4 connected gates). Known FW2 scope notes recorded in the code: the building-detail overlay replay is production wiring (FW3); the _drawCullModes scratch may not interleave with a mid-flight RetailAlphaQueue scope (FW3 sequencing constraint). The pixel A/B equivalence proof rides FW3's cutover toggle where a walk-driven scene first exists. Suites: full Release build 0 warnings; Walk lane 154/1 skip; hermetic 6,714/0 (+27 new). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
47 lines
2.6 KiB
C#
47 lines
2.6 KiB
C#
using AcDream.App.Rendering.Gpu;
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namespace AcDream.App.Rendering;
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/// <summary>
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/// Campaign FW stage FW2: the one depth-compare operator every world-space
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/// pipeline uses, named instead of repeated as a literal at each of the
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/// world's own pipeline-creation sites.
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///
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/// <para><b>Why <see cref="GpuCompareOp.Less"/>, not
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/// <see cref="GpuPipelineDescription"/>'s/<c>GpuDepthState</c>'s own
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/// <c>LessOrEqual</c> convention default:</b> the GL-era world frame ran under
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/// <c>GL_LESS</c> and never called <c>glDepthFunc</c> to change it, so every
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/// world-space renderer inherited <c>GL_LESS</c> by omission rather than by
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/// design. <c>LessOrEqual</c> would flip which of two exactly-coplanar retail
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/// surfaces wins the depth test — visible wherever terrain meets a road or a
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/// building footing, or wherever two retail-authored polygons share a plane.
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/// FW2's decomp verification (plan §FW2, read 2026-08-30) confirms retail's
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/// own world raster state is <c>D3DCMP_LESS</c>: the .data default
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/// <c>Render::zfuncVal</c> @0x00820e1c is <c>0x2</c>, and
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/// <c>RenderDeviceD3D::SetDepthBufferMode</c> @0x005a2d10 writes that enum
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/// value DIRECTLY as <c>D3DRS_ZFUNC</c> (render state 0x17) — the enum IS
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/// <c>D3DCMPFUNC</c>, so <c>0x2 = D3DCMP_LESS</c>. The surface-state applier
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/// @0x0059c80a–0x0059c866 applies it to all world geometry with Z-write
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/// toggled by blend state (on for opaque, off for blended), exactly this
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/// pipeline set's per-variant <c>depthWrite</c>. The <c>DEPTHTEST_LESSEQUAL</c>
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/// sites in the decomp are SKY-local (<c>GameSky::Draw</c> @0x00506ff0, drawn
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/// at 4× zfar) — never world state. So <c>Less</c> is not merely "what the
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/// port happened to inherit" — it is retail's actual world depth-compare
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/// operator, now named as a citable contract instead of a bare literal
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/// repeated at each call site.</para>
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///
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/// <para>Scope: WORLD-SPACE geometry only (terrain, EnvCell shells, entity
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/// meshes, particles, portal punches, the directional shadow caster/receiver
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/// pair). The two <c>RetailDetail</c> pipelines
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/// (<see cref="RetailDetailTextureContract"/>'s <c>Equal</c>/<c>LessOrEqual</c>
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/// pair, used by the building-detail overlay replay) are a documented
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/// exception with their own citation and are untouched by this contract.</para>
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/// </summary>
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internal static class WorldDepthContract
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{
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/// <summary>Retail's world-space depth-compare operator. See the type
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/// doc comment for the full citation; every world pipeline site should
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/// reference this constant rather than spelling <c>GpuCompareOp.Less</c>
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/// again.</summary>
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public const GpuCompareOp WorldCompare = GpuCompareOp.Less;
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}
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