ULodGlspComponent C++ Extension APIs

ULodGlspComponent · API Reference

These APIs do not have Blueprint reflection markup. Use them for custom LOD scheduling, picking, or rendering integration.

LOD Calculation and Scheduling

API	Description
GetLevelFittedByProjectedVoxelError(...)	Selects LOD by projected voxel error in screen space.
GetLevelFittedByScreenPixelQuality(...)	Selects LOD using allowed error = 4 / Quality and returns local units per pixel.
GetLevelFittedAverageSplatScreenSize(...)	Selects LOD by average on-screen Splat radius.
ChangeLevelWithView(...)	Accepts a shared view snapshot and controls whether dynamic filtering is allowed.
NeedsDynamicFilterUpdate(...)	Returns whether the current level needs to be filtered again.
InvalidateViewDependentLod()	Invalidates view-dependent LOD results.
RequestExplicitLodReschedule()	Forces rescheduling even when the level has not changed.
HasPendingExplicitLodReschedule()	Returns whether a forced reschedule is pending.
IsTaskRunning()	Returns whether an LOD task is running.
ShouldUseFullData()	Returns whether the current VR view uses full-data mode.
IsDynamicV2ActiveForCurrentView()	Returns whether the current VR view uses Dynamic V2.

Chunk, Resident Data, and Picking

API	Description
GetChunkBounds()	Returns the current Chunk's local bounds.
GetChunkResourceName()	Returns the cached Chunk name or a fallback name.
GetResidentRenderCenter(...)	Returns the alpha-weighted world-space center of resident Splats.
GetResidentRenderRevision()	Returns the revision of the resident rendering data.
RaycastSplats(...)	Finds the nearest hit in the current CPU-resident Splats.
CopyResidentRenderSnapshot(...)	Copies the internal rendering snapshot; its byte layout is not a stable storage format.

Internal SDK Collaboration

API	Description
GetSplatAssetInterface()	Returns the current asset through ISplatAsset.
GetCollisionAsset()	Returns collision data associated with the asset.
GetCollisionSourceFingerprint()	Returns the collision-source fingerprint.
SupportsLodRenderFeatures()	Always returns true.
HasExplicitSceneSurfaceProxy()	Returns the surface-proxy state supplied by the Actor.
SetRenderFeatureSettings(...)	Receives rendering settings propagated from the Actor.

C++ Example

Calculate and switch LOD using screen-pixel quality:

double LocalUnitsPerPixel = 0.0;
const int32 Lod = Chunk->GetLevelFittedByScreenPixelQuality(
    CameraPosition,
    ViewProjection,
    ViewportSize,
    Chunk->ScreenPixelQuality,
    LocalUnitsPerPixel);

if (Lod != INDEX_NONE && !Chunk->IsTaskRunning())
{
    Chunk->ChangeLevel(Lod);
}

Test the current resident data:

FVector HitCenter;
float HitDistance = 0.0f;
const bool bHit = Chunk->RaycastSplats(
    RayOrigin, RayDirection, 100000.0f, 1.0f,
    HitCenter, HitDistance);

Unreal lifecycle overrides and private functions are outside the documentation scope.

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