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Added dynamic mesh updating in asset editor preview #4

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Added dynamic mesh updating in asset editor preview #4

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f20128a
Updated the OnFocusViewport to focus on the actual mesh component in …
vahabahmadvand Jan 10, 2026
bf48a91
Add dynamic mesh updating in asset editor preview
vahabahmadvand Jan 10, 2026
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18 changes: 18 additions & 0 deletions Source/AssetEditorTemplateEditor/Private/AssetEditor/SimpleAssetEditorToolkit.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,9 @@ void FSimpleAssetEditorToolkit::InitAssetEditor(const EToolkitMode::Type Mode, c

// Create viewport widget
PreviewViewportWidget = SNew(SSimpleAssetViewport, SharedThis(this), CreatePreviewScene());

// Once the PreviewScene is constructed, then update the mesh
PreviewScene.Get()->UpdateMesh(SimpleAsset->PreviewMesh);

const TSharedRef<FTabManager::FLayout> Layout = FTabManager::NewLayout("SimpleAssetEditorLayoutv1.0")
->AddArea
Expand Down Expand Up @@ -163,6 +166,8 @@ void FSimpleAssetEditorToolkit::RegisterTabSpawners(const TSharedRef<FTabManager

TSharedRef<IDetailsView> DetailsView = PropertyEditorModule.CreateDetailView(DetailsViewArgs);
DetailsView->SetObjects(TArray<UObject*>{ SimpleAsset });

DetailsView->OnFinishedChangingProperties().AddSP(this, &FSimpleAssetEditorToolkit::OnFinishedChangingAssetProperties);

InTabManager->RegisterTabSpawner("SimpleAssetDetailsTab", FOnSpawnTab::CreateLambda([=](const FSpawnTabArgs&)
{
Expand Down Expand Up @@ -196,6 +201,19 @@ TSharedRef<SDockTab> FSimpleAssetEditorToolkit::SpawnTab_Viewport(const FSpawnTa
return SpawnedTab;
}

void FSimpleAssetEditorToolkit::OnFinishedChangingAssetProperties(const FPropertyChangedEvent& Event)
{
// If there are more properties, you can check the property name
//const FProperty* const ChangedProperty = Event.Property;

USimpleAsset* SimpleAssetObject = Cast<USimpleAsset>(GetEditingObject());

if (SimpleAssetObject)
{
PreviewScene.Get()->UpdateMesh(SimpleAssetObject->PreviewMesh);
}
}


void FSimpleAssetEditorToolkit::OnClose()
{
Expand Down
7 changes: 4 additions & 3 deletions Source/AssetEditorTemplateEditor/Private/AssetEditor/SimpleAssetPreviewScene.cpp
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Expand Up @@ -16,12 +16,10 @@ FSimpleAssetPreviewScene::FSimpleAssetPreviewScene(ConstructionValues CVS, const
//Hide default floor
SetFloorVisibility(false, false);

UStaticMesh* PreviewMesh = LoadObject<UStaticMesh>(NULL, TEXT("/Engine/EngineMeshes/Cube.Cube"), NULL, LOAD_None, NULL);
FTransform PreviewMeshTransform (FRotator(0, 0, 0), FVector(0, 0, 0), FVector(1.0f, 1.0f, 1.0f ));

{
PreviewComponent = NewObject<UStaticMeshComponent>(GetTransientPackage());
PreviewComponent->SetStaticMesh(PreviewMesh);
PreviewComponent->bSelectable = true;

AddComponent(PreviewComponent, PreviewMeshTransform);
Expand All @@ -36,6 +34,9 @@ FSimpleAssetPreviewScene::~FSimpleAssetPreviewScene()
void FSimpleAssetPreviewScene::Tick(float InDeltaTime)
{
FAdvancedPreviewScene::Tick(InDeltaTime);
}


void FSimpleAssetPreviewScene::UpdateMesh(UStaticMesh* PreviewMesh)
{
PreviewComponent->SetStaticMesh(PreviewMesh);
}
3 changes: 1 addition & 2 deletions Source/AssetEditorTemplateEditor/Private/AssetEditor/SimpleAssetViewport.cpp
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Expand Up @@ -49,8 +49,7 @@ void SSimpleAssetViewport::OnFocusViewportToSelection()
{
SEditorViewport::OnFocusViewportToSelection();

/* TODO: Replace with PreviewMeshComponent->Bounds */
const FBoxSphereBounds Bounds = FBoxSphereBounds();
const FBoxSphereBounds Bounds = PreviewScene->PreviewComponent->Bounds;
TypedViewportClient->FocusViewportOnBounds( Bounds, false );
}

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2 changes: 2 additions & 0 deletions Source/AssetEditorTemplateEditor/Public/AssetEditor/SimpleAssetEditorToolkit.h
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Expand Up @@ -43,6 +43,8 @@ class FSimpleAssetEditorToolkit : public FAssetEditorToolkit, public FNotifyHook

TSharedRef<SDockTab> SpawnTab_Viewport(const FSpawnTabArgs& Args) const;

void OnFinishedChangingAssetProperties(const FPropertyChangedEvent& Event);

private:

USimpleAsset* SimpleAsset;
Expand Down
2 changes: 2 additions & 0 deletions Source/AssetEditorTemplateEditor/Public/AssetEditor/SimpleAssetPreviewScene.h
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Expand Up @@ -17,6 +17,8 @@ class FSimpleAssetPreviewScene : public FAdvancedPreviewScene

virtual void Tick(float InDeltaTime) override;

void UpdateMesh(UStaticMesh* PreviewMesh);

TSharedRef<FSimpleAssetEditorToolkit> GetEditor() const
{
return EditorPtr.Pin().ToSharedRef();
Expand Down