Bonchellon
a95b299680
Editor plugin that detects geometrically-identical sibling StaticMeshes across a level, rebases each placement onto one canonical mesh with a corrected transform (W' = D * W, verified by exact vertex matching), and can collapse groups into HISM. Native Slate tool panel + BlueprintCallable UOptimizerSubsystem. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
// Copyright IHY.
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#pragma once
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#include "CoreMinimal.h"
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#include "EditorSubsystem.h"
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#include "OptimizerTypes.h"
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#include "OptimizerSubsystem.generated.h"
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class UStaticMesh;
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class UStaticMeshComponent;
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/**
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* Editor subsystem driving the Mesh Optimizer pipeline. The Editor Utility Widget calls these:
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* 1. ScanLevel -> dry-run plan (sibling groups + per-placement corrected transforms)
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* 2. ApplyUnify -> reassign every sibling placement to its canonical mesh with the fixed transform
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* 3. BuildHISM -> collapse each group into one HierarchicalInstancedStaticMesh
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* Steps 2 and 3 each run inside a single undoable transaction. BuildHISM is independent of ApplyUnify
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* (it uses the canonical mesh + planned transforms directly).
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*/
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UCLASS()
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class OPTIMIZEREDITOR_API UOptimizerSubsystem : public UEditorSubsystem
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{
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GENERATED_BODY()
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public:
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/** Dry run: scan the level, group sibling meshes, plan corrected transforms. Mutates nothing. */
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UFUNCTION(BlueprintCallable, Category = "Optimizer")
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FOptimizerScanResult ScanLevel(const FOptimizerScanSettings& Settings);
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/** Reassign all non-instanced sibling placements to their canonical mesh + corrected transform. Returns count changed. */
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UFUNCTION(BlueprintCallable, Category = "Optimizer")
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int32 ApplyUnify();
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/** Build one HISM actor per group from the planned transforms. Returns number of HISM actors created. */
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UFUNCTION(BlueprintCallable, Category = "Optimizer")
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int32 BuildHISM(bool bDestroyOriginals = true);
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/** Discard the current plan. */
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UFUNCTION(BlueprintCallable, Category = "Optimizer")
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void ClearPlan();
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UFUNCTION(BlueprintCallable, Category = "Optimizer")
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bool HasPlan() const;
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private:
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/** One placement of a mesh in the level (a component, or one instance inside an ISM/HISM). */
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struct FPlacement
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{
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TWeakObjectPtr<UStaticMeshComponent> Component;
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int32 InstanceIndex = INDEX_NONE; // >= 0 when this is an instance inside an ISM/HISM
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TWeakObjectPtr<UStaticMesh> Mesh;
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FTransform World = FTransform::Identity;
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FTransform PlannedWorld = FTransform::Identity;
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bool bNeedsTransformFix = false;
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bool bShearRejected = false;
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bool bInstanced = false; // inside an ISM/HISM -> ApplyUnify can't swap it (HISM-only)
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};
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/** A sibling group: distinct meshes that share geometry, collapsed onto one canonical. */
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struct FGroup
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{
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TArray<TWeakObjectPtr<UStaticMesh>> Members;
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TWeakObjectPtr<UStaticMesh> Canonical;
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TArray<FPlacement> Placements;
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float MaxDeviation = 0.0f;
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bool bHasMirrored = false;
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bool bHasScaled = false;
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bool bMaterialMismatch = false;
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int32 ShearRejected = 0;
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};
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TArray<FGroup> Groups;
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FOptimizerScanSettings LastSettings;
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FOptimizerScanResult BuildResultView() const;
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};
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