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feat(stats): stat VoxelForge -- make tile skipping and the column memo observable

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The plugin had ZERO stat counters, so every claim this refactor makes was
harness-only: "skipped correctly" and "skipped nothing" render identically.
CODEX-TASK-001 and -002, executed by Codex (gpt-5.6-luna xhigh), reviewed
against the source.

Eight DWORD counters in a new stat group:
  GenerateTileResult -- TilesClassified / SkippedAllSolid / SkippedAllAir / Meshed
  ClassifyTile bAnyCave exit -- TilesOpStackSolid / TilesOpStackAir
  FSurfaceColumnSource::GetColumn -- ColumnMemoHit / ColumnMemoMiss

The op-stack counters are separate from the lumped skip counters on purpose:
ClassifyTile also proves AllSolid on its hand-written bedrock-gap path with no
strate opted in, so the lumped number cannot show a before/after. The op-stack
pair is zero BY CONSTRUCTION until a strate ticks the flag.

GetColumn is instrumented and deliberately NOT fixed -- the instrument and the
fix in one build would make each other unreadable.

Verified against UE_5.7 Stats.h rather than assumed (first stats use in this
plugin, no in-repo precedent): all four macro arities, and INC_DWORD_STAT ->
FThreadStats::AddMessage, so the worker-thread safety both sites need holds by
mechanism. Not built -- Jahni builds.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Fr0zka
2026-08-16 16:01:26 +02:00
parent 7909c4f2ca
commit eb317d9933
7 changed files with 131 additions and 1 deletions
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Source/VoxelForge/Public/VoxelStats.h
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// VoxelStats.h
// Per-frame runtime counters for tile classification and meshing.
// Compteurs runtime par frame pour la classification et le meshing des tuiles.
#pragma once
#include "Stats/Stats.h"
DECLARE_STATS_GROUP(TEXT("VoxelForge"), STATGROUP_VoxelForge, STATCAT_Advanced);
DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Tiles Classified"), STAT_VoxelForgeTilesClassified, STATGROUP_VoxelForge, VOXELFORGE_API);
DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Tiles Skipped All Solid"), STAT_VoxelForgeTilesSkippedAllSolid, STATGROUP_VoxelForge, VOXELFORGE_API);
DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Tiles Skipped All Air"), STAT_VoxelForgeTilesSkippedAllAir, STATGROUP_VoxelForge, VOXELFORGE_API);
DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Tiles Meshed"), STAT_VoxelForgeTilesMeshed, STATGROUP_VoxelForge, VOXELFORGE_API);
DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Tiles Operator Stack Solid"), STAT_VoxelForgeTilesOpStackSolid, STATGROUP_VoxelForge, VOXELFORGE_API);
DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Tiles Operator Stack Air"), STAT_VoxelForgeTilesOpStackAir, STATGROUP_VoxelForge, VOXELFORGE_API);
DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Column Memo Hits"), STAT_VoxelForgeColumnMemoHit, STATGROUP_VoxelForge, VOXELFORGE_API);
DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Column Memo Misses"), STAT_VoxelForgeColumnMemoMiss, STATGROUP_VoxelForge, VOXELFORGE_API);